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1. 35 Figure 21 Operations that is possible to execute with the Icaro Cloud Simulator 37 Figure 22 Principal page of the dataCenter creation ii a7 iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 4 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Figure 23 Entity that is possible to add in a dataCenter i 38 Figure 24 Creation form of a hostMachine group i 40 Figure 25 Creation form of a MonitorInfo entity 4 Figure 26 Creation form of a LocalNetwork ENtity ii 42 Figure 27 Creation form of a LocalStorage entity 42 Figure 28 Single field on which insert URI of a SharedStorage n 43 Figure 29 Creation forms of ExternalStorage Firewall and Router groups 44 Figure 30 Creation form of a SharedStorage entity i 45 Fisure 51 Active C reateXME BUON 45 Figure 32 Page of creation of XML file relative to a dataCenter entity 46 Figure 33 Form for the sending of a new dataCenter to KB 46 Figure 34 Message of successful sending to KB
2. cesses 57 Figure 49 Creation form of a Creator ENtity iii 58 Figure 50 Exception generated if two creations with same URI and different information are liu M 59 Figure 51 KB message to notify the missing icaroService necessary to XLMS 209 604 922 0 TRIN OT E E TE E 60 Figure 52 Creation form of a ServiceMetric entity iii 60 Figure 53 Button to choose the simulation to 1011 62 Figure 54 Page of the real time simulation eene 62 Figure 55 DataCenter simulation with graphs of CPU Memory and Storage 62 Figure 56 Simulation page with form to add VirtualMachineS 63 Figure 57 Simulation page with form to add BusinessConfiguration 63 Figure 58 Alert message shows when there are not real data collected for fast simulation 64 Figure 59 Web page where it 1s possible to see the real data collected and manage the COME COTO gfe EE ED TET 64 Figure 60 Example of a chart relative to real data collected 65 Figure 61 In this page it 15 possible to associate one pattern to each VirtualMachine to SIG NET 65 Figure 62 Charts of the real data collected at the same time from all resource
3. nnne i GAFCRIEECIU Sia EU Tm 3 1 OW OM saio lat 3 2 CORO 3 3 DO 3 4 SI LA LU E UCI e R 4 dSeg ence Dafne atri 4 1 Composite Component in Icaro Cloud Simulator 4 2 Add a new panel to Create a DataCenter web page 4 3 Create a New DataCenter XML File 4 4 Sendthe DataCenter XML File to KB 4 5 Fetch information of a DataCenter i SEES UU cu MR 5 1 REAI UIE cm cola 5 2 Fast SIMONA TION anioni 6 JISFERAMEWOrK sarai 6 1 Nebbie VES uuo iran 7 1 Holes 7 2 Create a Da ACC CU ces tera te cette oes ee na 7 2 1 FIO SU IVC IC ai Todd Montor O scr E 21 ov Ria Tol eR REUS 7201 3 44 Store nn 7 2 1 4 Shared Storage 7 2 2 External Storage Firewall 0 224 4544 nee er 7 2 3 eue e ee ee 7 2 3 1 Exception in XML file generation 7 3 Create a BusinessConfiguration 7 3 1 Choose iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O ere s H LLL A 2 x y i ge Eri x eu ta A genit EB
4. Unione Europea l SN Regione Toscana Pa um 9 sate lo Cloud Simulator Design User Manual and Test Versione O 1 Data 16 09 2014 ProgettoiCaro La piattaforma cloud perl accelerazione delbusiness delle PMI toscane CUP 6408 3012 2011 026000074 COMPUTER GROS liberologico com UNIVERSIT DEGLI STUDI FIRENZE DINFO DIPARTIMENTO DI INGEGNERIA DELL INFORMAZIONE CircleG Technology amp Mind D3 27 3 Cloud Simulator design user manual and test Informazioni sul documento ID Deliverable 3 27 3 fa sii ee rois MR Distribuzione Riservato Pubblico otis PR Riferimenti soggetto che approva Controllo delle revisioni Oggetto Numero Data 16 09 2014 Nota di riservatezza Il presente documento sar utilizzato esclusivamente ai fini del progetto ICARO ha carattere riservato e non potr quindi essere divulgato se non in seguito ad esplicita autorizzazione scritta da parte dell ATS salvo il caso in cui di richieste di ottemperare ad obblighi di legge o a richieste di pubbliche autorit iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 2 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Index 1 Cloud Simulator Requirements 2 Cloud Simulator Domain Model
5. iii 13 Figure classes are tbe CONC ina 14 Figure 8 Class DataCenerViewer and its methodS 15 Figure 9 lt gt 16 Figure 10 Example of one method containing the values to fill the attributes of a CC 18 Figure 11 Sequence diagram that show how to add a panel to the dataCenter form 20 Figure 12 Sequence diagram that show how the XML file of a DataCenter is create 22 Figure 13 Example of one method that converts an object to an XML element the code 1s Suni 29 Figure 14 Sequence diagram that show how the XML file of a DataCenter is sent to the KB 23 Figure 15 Comparison between get and fetch methods to retrieve a DataCenter by the iud 26 Figure 16 Sequence diagram that show how one DataCenter is fetched from the KB 2 Figure 17 Sequence diagram that shows how 1s performed the real time simulation 30 Figure 18 Sequence diagram that shows how is performed the fast simulation 32 Figure 19 Model 2 structure of a typical J2EE application 34 Ficure 20 Model 2 siructure WiN SE
6. gt Send to nagiosService CPU AVG file OK Send nagiosService Physical Memory lLsed file OK gt Send to nagiosService Disk Usage file OK Figure 63 Page of fast simulation where it is possible to see the log of simulated entity iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 66 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 7 6 Analyze Metrics Through this operation it is possible to analyze the metrics that are present in the KB As mentioned in section 8 3 1 Choose DataCenter to use this operation it is necessary to choose and to load form the KB the DataCenter that the user want analyze Once the DataCenter is loaded the user is redirected on the web page in Figure 64 Figure 64 Web page that allow to analyze the metrics in the SM It is possible to note in the figure on the left the list of HostMachines and VirtualMachines contained in the DataCenter selected in the previous page On the list it is possible to select the VirtualMachines and the HostMachines for analyzing the metrics Once the entity are selected the user must insert start date and end date of the period that he want analyze Clicking the button Metrics the charts of Figure 64 are created If two selected entities are the same metric then the data will be grouped in a single chart and a curve will be shown for e
7. Entities that it is possible to add on a virtualMachine To see how to add those entities and for details about information to be included it is possible to consult the sections 8 2 1 1 Monitor Info 8 2 1 2 Local Network e 8 2 1 3 Local Storage as the form and the information to be included not vary with respect to the entities that it is possible to add on a HostMachine The only change is that the URI of a virtualStorage is generated automatically compared to URI of a LocalStorage generated manually urn cloudicaro VirtualStorage Test OneHost HMO1 VMO2 VSO As the creation form of a DataCenter also this form show a yellow alert which informs the user about what entities must be included to enable the Next button This button allows you to go to the next page to create the new BusinessConfiguration The Clear button allows resetting the page erasing all information inserted and all form added to principal form The Back link allows redirecting to web page of choice of a DataCenter in the case that user should change the chosen DataCenter with another contained in the KB or should change the KB previously chosen iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 52 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O 4 OW D3 27 3 Cloud Simulator design user manual and test e Chose the DataCenter on which create the new BusinessConfiguration and created VirtualMach
8. Figure 16 Sequence diagram that show how one DataCenter is fetched from the KB iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 27 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test The Load button calls the LoadDataCenter method in the DataCenterController class that in turn call the fetchDataCenterByURI method Figure 15 in the DataCenterDAO class which at the first step retrieves the basic information of the DataCenter as mentioned above and then it tries to retrieve information about the associated entities To retrieve information of the associated entities such as HostMachine the fetch method in the DataCenterDAO class calls the method that returns the URI list of the entities of type that is considered for all URI in this list it is called the fetch in the respective DAO of the type that is considered Each of these fetch methods work as described for the fetchDataCenterByURI method in a manner that retrieve all the entities associated with the principal entity in this case a DataCenter and other entities associated with the second entities and so on In case of entities that do not have any entity associated such as MonitorInfo NetworkAdapter and LocalStorage only the method get is called as it possible to see in Figure 15 and it can also see the difference between these entities and for example the VirtualMa
9. Once sent the RRD files to Nagios it is possible to see the charts created by the values contained in these files with the Supervisor amp Monitor tool iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 33 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test 6 JSF Framework Java Server Faces https docs oracle com javaee 7 tutorial jsf intro htm BNAPH is a framework for the realization of web applications it provides to programmer tools for the realization of user interfaces and for the management of the navigation flow of the application in the first case it offers a set of default component ready to use and in the second case using an event logic It is composed basically by e Asetof API to represent and to manage the state of the interface components to handle the events generated by these components and to validate data inserted by the user e A specific tag library to insert in the web pages the interface components The management logic of the application is delegated to the Backing Bean specific annotated Java classes that presents a series of data member associated to the various interface components containing dynamic information to represent on the page or on the pages to manage or accountable to receive information that is inserted by the user through the associated component i e a form
10. 8 createXportERDxmlF ila iA A H 11 create qlosrrdGescripthonF rom snl E H i 12 nagiosRr Description i s iind values from xpartErd with nagioshind description intonation i E i loop for all values to simulate al values to simulate E i 14 ea fileHame valueDate value i 15 command command pag i F pe e us currenterkLoadiHost variabla i create miDeseriptionForRfADirdPileltame smlFilehName cunentivalue unit currentTime machineltame rma amp chinelP nagiosServiceDesc pas sendERRDTaNagiasServenworkingEDirectory hasc s resource E 18 send RRD files to Nagios server with JSch library and the scp command E i 20 change the page b inform ine user Of the simaulalicrn progress i i 22 retresh 21 sat Sampler orHbiinamevyorkingDirectary ndPHostdachine resource maxiimitfesource hosthtachine statini values i z 33 ereat ARDAF Malara stantate step im 4 command commandtCreaate i i loop Tor all values t simulate 25 updarteFFD mdr filename valueDate value 27 reatexmiDescnptiont ar RR Diraf eame xmlFilel nme Current alu unit currentTime MachineMame machine nagiosSericeDesc I 20 sandRRDToHagioszerver workingDirectory hag OS resource 28 sand RRD filas te Nagios server with JSeh library and sep command i 40 change the page to inform the user af the simulation progress f 31 refresh Fig
11. R N Calheiros M A S Netto C sar A F De Rose and R Buyya 5 Software Practice and Experience Vol 43 p 595 612 17 MDCSim A multi tier data center simulation platform Seung Hwan Lim Bikash Sharma Gunwoo Nam Eun Kyoung Kim and Chita R Das New Orleans IEEE 2009 Cluster Computing and Workshops IEEE International Conference on 18 CSIM Development Toolkit for Simulation and Modeling Online http www mesquite com 19 Modeling and Simulation Frameworks for Cloud Computing Environment A Critical Evaluation A Bashar iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 69 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O
12. Returning to the previous operations the method startSimulation in the DataCenterSimulationRealTime class in addition to start the HostMachineSimulator threads it also starts another thread based on the class DataCenterSimulatorMonitor with this class the system can show charts for all the workloads calculated by each HostMachineSimulator iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 29 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Ul Controller Thread Thread Thread Thread GaussianGenerator dataCenterSimulationRealTime xhtml DataCenterSimulationRealTime DataCenterSimulatorMonitor HostMachineSimulator VirtualMachineSimulator IcaroServiceSimulator user Guest 1 click Start See a start 4 initSubThreads i i D 6 initSubThreads i l i li LLL 8 updateWorkload l 3 generate random value i 10 update variables Il i 11 updateWorkload I m 12 get workload values 13 update variables i i 14 updateWorkload li l m 15 get workload values 16 update variables a 17 startMonitor i Lal 18 start 19 updateAllCartesianChartModel 20 get workload values 21 update charts g EE m i 22 inserting charts l Figure 17 Sequence diagram that shows how is performed the real time simulation iC
13. This value is compared with the limit inserted in the following field iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 57 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test e limit indicates the conditions that must be respected by memories in the KB respect to value inserted in the previous field value The values that can be chosen are Greater Less o Equal and they match with gt lt e e dependsOn naturally the same metric can be measured on more resources contained in the cloud platform and in this field must be inserted the resource of interest to respect SLAgreement clause At the moment it is possible to choose between Host and Virtual Machine 7 3 3 3 Creator An icaroApplication can be associated to its Creator For this the following information must be inserted in the form of Figure 49 e urn cloudicaro User URI of the Creator e name name of the Creator e email email of the Creator EE 1 Creator urn cloudicaro User admin name Administrator email admin icaro it Figure 49 Creation form of a Creator entity This entity is similar to LocalNetwork entity seen in the previous sections this last is inserted to create automatically the NetworkAdapter entities and to associate them with the entities that are connected at that network furthermore the system checks if two LocalNetwork with t
14. XmlSparglTolcaroService TS UASA SSL Pr 0 icaroApplicationList lt 58 F i USEN Java Class Java Class Java Class XmliSparqiTolcaroApplication oAp plicationDAO BusinessConfiguration pele fe ui rA L BEREG L 2 Use O ApicaroTenantlist 1 1 USB9 TTT USB Java Class 3 Java Class IcaroTenant BusinessConfigurationDAO VE RR XmlSparqIToBusinessConfiguration x r I USB 1 USE Java Class Java Class XmlSparglTolcaroTenant IcaroTenantDAO pU use o ERE O Figure 7 DAO classes architecture There is also a method to retrieve the list of objects contained in a parent entities instead that only the URI for each entity are retrieved simple information as name and identifier and are not retrieved information about associated entities So this method is useful when a user does not want to retrieve iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 14 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test information about a single entity contained in the list that is returned but he would like to retrieve only the information which is faster to retrieve The previous method uses another method present in DAO classes the method that retrieves simple information about a single
15. ances DropDownMenu Java Class StaticAttributesRepository i Java Class Java Class DataCenterDAO lt DynamicAttributesRepository 5 7 E D use et 0 listDropDownltem Java Class DropDownltem Java Class CCUtility ee use use use use se wee eee eee wees ee whe eS SS SS SS SSS SSS SSF EERE Java Class Java Class ava Llas VirtualMachineViewer Java Class Java Class Java CI eMe i DataCenterViewer ServiceMetricViewer BusinessConfigurationViewer le R J gt lt 0 1 serviceMetricController 9 1 dataCenterController 0 1 y businessConfigurationController 0 1y virtualMachineController Java Class Java Class Java Class Java Class ServiceMetricController DataCenterController BusinessConfigurationController VirtualMachineController ed _ _ lt __t ___ MMMMMM XX M Mm oi i Fi a dataCenterController 9 4 virtualMachineController 0 1 Figure 3 Viewer class architecture Similarly also the methods that remove panels are created with the same rule prefix removePanel the name of the entity associated with that panel and the name of the entity associated with parent panel from which will be removed the chosen panel In
16. docs oracle com javaee 7 tutorial jsf el htm GJDDD which provides an important mechanism for enabling the presentation layer web pages to communicate with the application logic e Use of the Converters and Validators in every Input Text of the web pages https docs oracle com javaee 7 tutorial jsf page core htm GJCUT To render this description as simple as possible classes are grouped by functions that they implement The domain model is not described another time see chapter 3 for the description 3 1 Viewer Classes with Viewer suffix are responsible to interact with web pages adding and removing everything is visible on the web application such as buttons panels and input text Icaro Cloud Simulator allows insertion of information about entities described in the ontology This is achieved via panel containing form where users can insert information On the web page where is possible to create a data center each panel represents a group of entities that are indicated by the name of the panel for example a panel with name 1 groupHostMachine allow defining information about a group of host machines that have all the same features CPU RAM OS etc The viewer classes allow the addition and the removal of panels for insert more information or delete them if they are incorrect These classes are obviously associated to classes that are responsible for the control those with suffix Controller In fact any information inserted
17. two methods of the Navigator class beginConversation and goToDataCenter The first method allows starting a new conversation to keep the beans declared to be ConversationScope https docs oracle com javaee 7 tutorial cdi basic008 htm GJBBK alive until the conversation is not closed The second method simply sets a Boolean variable to true and a string variable to Create a DataCenter these variables are used in the web page to show or to hide buttons and links based on iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 18 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test which web page is shown at the user Boolean variable and to set the proper title on the navigation bar String variable The new page is loaded and the user can choose in the drop down menu shown in Figure 23 what is the entity that he wants to add at the dataCenter Assuming that the user click to add a HostMachine panel system calls the AddPanelGroupHostMachine method on the class DataCenterViewer In this method there is a call to method setFirstPanel of CCUtility class that needs as parameters e indexPanel The index of panel that the system will add at the end of this operation e panelDataCenterBody The parent panel where the new panel will be added e groupHostMachine The name of the entity associated to the new panel e dat
18. CC must be inserted dynamically through the java classes and not directly on the xhtml pages and it can be done with insertion of information about attributes to set in the CC and the filename of the file where the CC is saved If a panel of first level is taken as example the attributes that can be inserted are e idCC indicates the id to associate at the whole CC e indexPanel indicates the index that has the panel in the CC It is necessary to remove the correct parent panel and to add o to remove a child panel e titlePanel the title that is shown on the header of the panel e removeAction method that performs the removal of the whole CC e listinputlP list of inputText that allow inserting and checks address IP correctness e listlnputDate list of inputText that allow inserting and checks date correctness e listlnputEmail list of inputText that allow inserting and checks email correctness e listlnputText list of inputText that allow inserting text e listinputNumber list of inputText that allow inserting number e listinputSelectOneMenu list of selectOneMenu that allow selecting a value from a menu e listinputSelectOneMenuDynamic list of selectOneMenu that allow selecting a value from a menu difference to previous is how the menu is filled e listDropDownMenu list of DropDownMenu that should allow the choice of entities to add at the entity associated with the current CC e objectLinkToPanel indic
19. LocalNetwork e identifier identifier of the LocalNetwork GE LocalNetwork networkAddress 192 168 0 0 subMetMask 255 255 2550 urn cloudicaro LocalNetwork LNetO1 name LocalNetworkTest identifier LNT Figure 26 Creation form of a LocalNetwork entity 7 2 1 3 Local Storage This entity behaves exactly as the entity monitorlnfo each created entity will be inserted in each HostMachine of the group is being generated Each LocalStorage entity unlike monitorInfo will have an own URI automatically calculated by the system considering DataCenter and HostMachine within which is situated and number of LocalStorage created in a HostMachine group urn cloudicaro LocalStorage Test 012 HMO1 LSO The information that must be inserted in the form of Figure 27 is e name name of the LocalStorage e identifier identifier of the LocalStorage e diskSize size in GB of disk in LocalStorage a 1 LocalStorage name localStood 1 identifier LS01 disksize 7000 Figure 27 Creation form of a LocalStorage entity iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 42 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 7 2 1 4 Shared Storage Unlike other entities associated to a HostMachine SharedStorage entity is not completely defined in the form of the creation of HostMachine group In this form the user can only
20. are composed by SLActions that represent the actions undertake from the system when the clauses of SLAMetric are not respected Figure 48 In Figure 48 it is possible to see that the SLObjective entity has not their fields but it is a simple container for entities SLAction and SLMetric The information that can be inserted in a SLAction entity is iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 56 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test e name name of the action that is executed if the SL Metric constraints are not respected e CallURI if the action that must be executed it can be called through an URI in this field this last must be inserted The information that can be inserted in a SL Metric entity is e name the name of the metric that is stored in the KB and it is under control to respect this SLAgreement e unit unit of measure that is associated to follow field named value m 1 SLAgreement startTtime 2014 01 01T00 00 endTime 2014 12 31T23 598 a SLObjective EE 1 SL Action name send an Email callURI http www example com m 1 Metric name avgCPUPerc unit percentual value 30 Limit Less dependsOn urn cloudicaro HostMachine TES T 00 Figure 48 Creation form of SLAgreement relative entities e value the value that must be respected
21. associated to a single entity generated by this form name name of the SharedStorage identifier identifier of the SharedStorage diskSize size in GB of the disk contained by SharedStorage Create XML If all information requested by the yellow alert present in Figure 22 are inserted the button CreateXML is active Figure 31 the alert disappears and it is possible to perform the creation of the XML file that represents the DataCenter relative to entered information Add gt Create XML urn cloudicaro DataCenter TEST 012 hasName Data Center Test 012 hasldentifier DTC012 Figure 31 Active CreateXML button Once the button CreateXML is pressed if there is no problem see following paragraph the system is redirect to web page in Figure 32 iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 45 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Ud Visualize XML DC Create a BusinessConfiguration SendToKB Download XML Back lt xml version 1 0 encoding UTF 8 standalone no gt IDOCTYPE rdf RDF ENTITY owl http www w3 0rg 2002 07 owW ENTITY xsd http www w3 0rg 2001 XMLSchema gt lt ENTITY rdfs I http www w3 0rg 2000 01 rdf schema ENTITY raf http www w3 0rg 1999 02 22 rdf syntax ns gt lt ENTITY icr http www cloudicaro it cloud_ontology core
22. entity and returns an object instead a list of objects In the end there is a method that starts with the prefix fetch and that retrieves all the possible information present in the KB associated with desired entity This method can explain the visible associations in Figure 7 in fact when the information about a DataCenter is requested the class DataCenterDAO retrieve simple information about DataCenter entity and then it calls method to fetch information on class HostMachineDAO In turn HostMachineDAO retrieve simple information about HostMachine entity and then it calls method to fetch information on class VirtualMachineDAO and so on Jaya Class DataCenterDAO tgetUEIDatacenterListBylkB ipOfkB String qetDataCenterListByKB ipOfkKB String tgetDataCenterByURl pOfKB String uribataCenter String tfetchDataCenterByURl ipOTKB String uribataCenter String Figure 8 Class DataCenerViewer and its methods There are classes that have more fewer than 4 methods Those that have more methods such a UserDAO or IcaroServiceDAO it is due to the structure of ontology in fact the entities User and caroService can be considered in more than one parent entities User can be part of BusinessConfiguration IcaroApplication or IcaroTenant and caroService can be part of caroApplication or VirtualMachine In these classes there are two additional methods for each parent entity more first Those that have fewer methods such a M
23. file generation How it is written in the section 8 2 1 2 Local Network the web application e Will check that no exist two LocalNetwork inserted with the same URI but with different information e Will check if the availability of IP addresses of each LocalNetwork is able to satisfy the request of IP addresses base on the number of entity that must have a NetworkAdapter to access a determined LocalNetwork As mentioned in the section 8 2 1 4 Shared Storage the application iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 47 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test e Check if a SharedStorage URI inserted in the creation form of a HostMachine group matches to a SharedStorage effectively created If the previous checks performed by the application fail so error messages are generated to inform the user that inserted data are wrong These messages are generated in a new page from which is possible to return to that where it is possible to insert data so that it is feasible to change the data and avoiding generation of new exceptions Exception The Local Network urn cloudicaro LocalNetwork LNet01 is too little for the hosts connected in it Figure 36 Exception generated if a localNetwork does not have enough IP addresses If the inserted LocalNetwork has not enough IP addresses for all the entities th
24. gt lt ENTITY app http www cloudicaro it cloud_ontology applications gt gt D lt rdf RDF xmins app http www cloudicaro it cloud_ontology applications xmins foaf http xmins com foaf 0 1 xmins icr http www cloudicaro it cloud_ontology core xmins xsi http www w3 org 2001 XMLSchema instance xsi schemaLocation http www w3 org 1999 02 22 rdf syntax ns schema icaro kb dataCenter xsd xmins rdf http www w3 org 1999 02 22 rdf syntax ns gt icr DataCenter rdf about urn cloudicaro DataCenter TEST 012 icr hasName Data Center Test 012 lt icr hasName gt lt icr hasidentifier gt DT C01 2 lt icr hasidentifier gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM01 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM02 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM03 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM04 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM05 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM06 gt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM07 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM08 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM09 gt lt icr hasPart rdf resource urn cloudicaro HostMachine TEST 012_HM010 gt lt icr DataCenter gt lt ic
25. in the middle between a viewer and a controller 6 1 Facelets For the definition of the structure of the pages of a Web application can be used several templating languages JSF provides the standard JSP however can also be used XML based languages such as Facelets https docs oracle com javaee 7 tutorial jsf facelets htm GIEPX The life cycle of Java Server Faces is composed of several phases and unlike JSP which processes the elements of a page in the order in which these appear JSF organizes them in a complex tree structure These differences lead to a series of incompatibility linked to the fact that the components operated by JSP are displayed in order of appearance within while those of the page JSF as defined by the phase iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 35 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 Ay c OM Auc oracio pat proie c D lt D3 27 3 Cloud Simulator design user manual and test ane RenderResponse Facelets is created to replace the JSP page creation overcoming such incompatibilities With Facelets using the tools offered by JSF it is possible to create custom interface components and place them within the pages calling them with the associated tags These components can in turn be combined to create new ones or can be collected in real libraries reusable in other applications iCaro La piattafo
26. insert the URI of a SharedStorage to associate it at each HostMachine of the group that is generating through the field visible in Figure 28 urn cloudicaro SharedStorageVolume Figure 28 Single field on which insert URI of a SharedStorage In the following sections it is described where it is possible to define such entity and the controls that are executed so that a SharedStorage URI inserted in the form of the creation of a HostMachine group it is equal to a really created sharedStorage 7 2 2 External Storage Firewall Router The forms to insert entities ExternalStorage Firewall and Router are identical The only difference is in the ExternalStorage form with an additional entry on dropDown menwu this entry is relative to insertion of SharedStorage entity described in the previous section For this similarity the forms are described together and they are shown in Figure 29 For these entities it is valid what claimed for HostMachine to speed the insertion of the entities of testing DataCenter in the form is not inserted a single entity at a time but it is inserted information about a group of entities to create single entity automatically Naturally to create a group with dimension 1 it is equal to create a single entity The information that must be inserted to create these entities e prefixName name that must have the entity is being created As the entity HostMachine the text inserted will represent the prefix of the nam
27. irewall yy 0 Java Class Java CI GroupE xternalStorage GroupFirewall s e Virtu dittatori 0 1 yj businessConfiguration GroupVirtualMachine localNetworkList localNetworkList Java Class m LocalNetwork Java Clas BusinessConfiguration localNetwork 0 1 Figure 5 Controller class architecture There are many differences between the classes in Figure 6 These differences are due to the different type of information that a user can insert on web application In fact when a user would like to create a DataCenter he can insert information about groups of entities such as ExternalStorage Router Firewall and HostMachine and for this reason in the class DataCenterController are present methods to create each entity from information about the group whereas is possible to add a BusinessConfiguration only in an existing DataCenter and therefore it is necessary the method oadDataCenter which allows retrieving information about DataCenter salved on KB At last the method called simulate is responsible to start a simulation Java Class BusinessConfigurationController Java Class DataCenterController controllnputtonsistencyi tcreateDatac enterxML createDataCenter tcreateBusinessConfiguratioriML i tgetxmlkEdfoOfBusinessCanfigurationFromServert tsendxmlEdfoOfBusinessConfiguration Talk Br createHostMachine tcreateF irewall tcreateE xternal
28. must be generated e minValue the minimum value that the metric can assume e maxValue the maximum value that the metric can assume e finalValue the last value that the metric must assume It can be a value outside of the interval minValue maxValue e from start date of the metrics e to end date of the metrics The period of generation of metrics is a dummy period and metrics will be generated all instantly to be sent to the KB 7 4 1 Create XML Concerning the creation of the XML file of the ServiceMetrics inserted and the page that is accessed once created this file you can see 8 2 3 Create XML on the creation of the XML file of a datacenter The only changes are that in the navigation bar is not present the link to create a new BusinessConfiguration since the system are creating service metrics the REST API that is called for the inclusion of the ServiceMetrics in the KB is different and the generated XML file contains all ServiceMetrics instead of generating a single XML for each ServiceMetric 7 5 Simulate DataCenter This operation allows to simulating the functioning of a cloud platform to e Automatically generate metrics in a different way to the previous described e Study the behavior of the cloud platform during the insertion of new BusinessConfiguration in particular when are inserted new VirtualMachine and IcaroService The simulation can be performed in two ways e Real Time the simulation time is the
29. of a new DataCenter 47 Figure 35 Message of unsuccessful sending to KB of a new DataCenter 47 Figure 36 Exception generated if a localNetwork does not have enough IP addresses 48 Figure 37 Exception generated if two localNetwork with same URI and different IDTOPDBOLOD Ale INI RR RR CR E E oM M REMISE OMM CMM E 48 Figure 38 Exception generated if a SharedStorage associated to a HostMachine it is not Created in one BXEernalstOEd PO Loic irritare 48 Figure 39 Insertion of the IP Address and the port of a working KB 49 Figure 40 List of DataCenter contained in the KB achievable at 192 168 0 106 8080 49 Figure 41 Creation form of a VirtualMachine group 50 Figure 42 Entities that it is possible to add on a virtualMachine 52 Figure 43 Principal creation page of a Business Configuration iii 53 Figure 44 Creation form of an IcaroApplication entity eese 54 Figure 45 Entities that is possible to add on an Icaro Application 54 Figure 46 Creation form of an IcaroService entity ii 55 Figure 47 Entities that is possible to add on an Icaro Service 56 Figure 48 Creation form of SLAgreement relative entities
30. same as the user Through this simulation it will be studied the behavior of the cloud during the insertion of new BusinessConfiguration iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 61 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test e Faster in this case the simulation time is not the same as the user the simulation time depends on the computing power of the system Start date and end date are selected and in this period are automatically generated the metrics for all entities of the previous chosen DataCenter The choice between the simulations can be done through the button visible in Figure 53 After choosing one of the two types of simulation the user is redirected on the page of choice of the DataCenter where it is possible to choose which DataCenter simulate To have information about this page it possible to see the section 8 3 1 Choose DataCenter Real Time Simulation Faster Simulation Figure 53 Button to choose the simulation to perform 7 5 1 Real Time Simulation The page that allows simulating a DataCenter is visible in Figure 54 Simulate Data Center urn cloudicaro DataCenter TES T 002 Real Time Create a BusinessConfiguration Back urn cloudicaro HostMachine TEST 002_HM01 VM 5 urn cloudicaro HostMachine TEST 002_HM02 VM urn cloudicaro HostMachine TEST 002_HM03 VM Figur
31. then he clicks the button Send it will call the method sendXmIRdfOfDataCenter in the DataCenterController class The method hides the form where the user has just inserted the information and then it calls the method sendXmlToKb on the KBDAO class passing as principal parameter the string that represents the XML file to send the KB This last method in turn calls the method sendString on the RestAPI class because as mentioned the XML file has been transformed into a string To insert the string in the KB it is necessary to perform an httpRequest of type PUT at the RestAPI exposed by the KB the httpResponse that is returned from the httpRequest is used to fill the fields in an object of the class responseMessageString This object is returned back through methods calls to DataCenterController class and according the values contained by the object a success or a failure panel is shown to the user to inform him of the result of the insertion 4 5 Fetch information of a DataCenter This section describes the operations performed to fetch the information about a selected DataCenter that are shown in the sequence diagram in Figure 16 The whole sequence diagram starts when the system shows the user the web page of choice of the DataCenter once that the user selects a DataCenter this last is fetched from the KB with the information about each entity associated with the DataCenter On the dataCenterChoice jsf page is shown to the user an Inpu
32. this case however the parameters to pass are more than two the id of parent panel the id of panel to remove and the respective indices When a panel is removed the methods which delete it perform the removal of all children of that panel avoiding reference to a nonexistent panel Java Class DataCenterViewer addPanelGroupHostMachine t addPanelGroupExtemalStorage addPanelGroupFirewall addPanelGroupRouteri removePanelGroupHostMachinefidPanelToRemove String indexPanelToRemove int removePanelGroupExternalStorage idPanelToRemove String indexPanelToRemove int removePanelGroupFirewall idPanelToRemove String indexPanelloRemove int removePanelGroupRouter idPanelToRemove String indexPanelToRemove int taddPanelLocalNetworkGroupHostMachine htmlPanelParent HtmlPanelGroup indexPanelParent int addPanelLocalNetworkGroupExternalStorage htmlPanelParent HtmlPanelGroup indexPanelParent int taddPanelLocalNetworkGroupFirewall htmlPanelParent HtmlPanelGroup indexPanelParent int addPanelLocalNetworkGroupRouter htmlPanelParent HtmlPanelGroup indexPanelParent int removePanelLocalNetworkGroupHostMachinefidPanelParent String idPanelloRemove String indexPanelParent int indexPanelToRemove int removePanelLocalMetworkGroupExternalStorage idPanelParent String idPanelloRemove String indexPanelParent int indexPanelToRemove int removePanelLocalNetworkGroupFirewall idPanelParent String idPanelToRe
33. uti waa creates updates Servlet lavaBean Request dispatches control to f accesses Response Figure 19 Model 2 structure of a typical J2EE application Furthermore specific methods can be present to be invoked in response to an event generated by one of the element of the interface for example through a selection of a link or the click on a button The JSF applications are structured according to MVC paradigm in particular according to the so called Model 2 variant A generic Model 2 application requires the presence of a single centralized controller that receives all requests submitted by the user via the web browser interprets them interacts with the data model and determines to which view pass the control and if the generated output is correct each view can if it is necessary interact with the model to retrieve the necessary data In typical Model 2 applications made with platform J2EE the role of the controller is delegated to a servlet the model consists of normal Java classes and JavaBean In addition for example to any classes dedicated to interaction with the Database and the views are realized through JSF pages as shown in the diagram in Figure 19 In a JSF application the views are represented by the tree components associated to each page consisting of the components used in the same page a specific iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 34 di 69 CUP
34. 1 ID data center ICARO URI DTG002 ID Data Center Test 002 URI DTCO12 ID Data Center Test 012 URI DTCO12 ID Data Center Test 011 URI DTC1 ID Data Center Test URI DTC1 ID Data Center Test URI DTG 11 sett ID TEST DISIT 11 settembre URI DTG015 ID Data Center Test 015 URI DTG016 ID Data Center Test 016 URI DTCO017 ID Data Center Test 017 URI DTCO018 ID Data Center Test 018 URI DTG019 ID Data Center Test 019 URI DTG020 ID Data Center Test 020 URI dc01 ID data center ICARO URI DGC disit ID data center DISIT URI DTG021 ID Data Center Test 021 DTC022 ID Data Center Test 022 Figure 40 List of DataCenter contained in the KB achievable at 192 168 0 106 8080 If this KB is not that desired it is possible to change the inserted data clicking on the button Change iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 49 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 Acton D3 27 3 Cloud Simulator design user manual and test a If the user wants to know HostMachine VirtualMachine and IcaroService in one of the DataCenter in the list he must press the button Load once selected the desired DataCenter Once that the entities of a DataCenter are shown the user can decide to create a BusinessConfiguration on the selected DataCenter he can perform this operation clicking the button Next to access the form of insertion of a new BusinessConfigurat
35. 2012 Vol 62 p 1263 1283 5 Cloud computing simulators A detailed survey and future direction A Ahmed and A S Sabyasachi Guargon IEEE 2014 Advance Computing Conference IACC 2014 IEEE International pp 866 872 6 The Glasgow Raspberry Pi Cloud A Scale Model for Cloud Computing Infrastructures F P Tso D R White S Jouet J Singer and D P Pezaros 2013 Distributed Computing Systems Workshops ICDCSW 2013 IEEE 33rd International Conference on p 108 112 7 CloudSim a toolkit for modeling and simulation of cloud computing environments and evaluation of resource provisioning algorithms R N Calheiros R Ranjan A Beloglazov C A F De Rose and Rajkumar Buyya 1 New York Wiley Press 2011 Software Practice and Experience SPE Vol 41 pp 23 50 ISSN 0038 0644 8 Study and Comparison of CloudSim Simulators in the Cloud Computing R Malhotra and P Jain 4 2013 SIJ Transactions on Computer Science Engineering and its Applications CSEA Vol 1 pp 111 115 9 iCanCloud A Flexible and Scalable Cloud Infrastructure Simulator A N fiez J L V zquez Poletti A C Caminero G G Castan J Carretero and M Llorente 1 s l Springer 2012 Journal of Grid Computing Vol 10 p 185 209 10 DCSim A data centre simulation tool for evaluating dynamic virtualized resource management M Tighe G Keller M Bauer and H Lutfiyya 2012 The 6th International DMTF Academic Alliance Work
36. 46 is shown the form to insert information about caroServices entity e monitorlPAddress IP Address belonging to caroService on which monitoring is performed e name name of IcaroService e identifier identifier of caroService e processName the name of the process with which the caroService is executed in a VirtualMachine e username username to access caroService e password password to access Icaro Service e typeOfService in this field the choice is constrained to the types of services that allow the execution of caroApplication in iCaro cloud platform The user is responsible to choose those services that allow execution of an caroApplication GD 1 IcaroService monitoriPAddress 192 168 0 254 name icaroService Test identifier ICT processName Service Test username root password XXXX typeOfService AxcpGridNode m supportedLanguage C la monitorState Enabled m runsOnVM urn cloudicaro VirtualMachine TES T OneHo Pa Figure 46 Creation form of an IcaroService entity iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 55 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test e supportedLanguage it is possible to choose which language is supported from the IcaroServices The choice is constrained to languages that will support the Icaro cloud platform e monitorState it shows if the moni
37. 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test servlet called Faces Servlet plays a role of front controller it receives the client requests and it pass the control to the correct view updating the values of the bean properties that have changed due to interaction of the user or the user are inserted some data The servlet is responsible to invoke the validators of the various components in order to control the correctness of information inserted by the user and to execute the ActionListeners associated to components that have generated some kind of event Controller Request _ Action SN E Handlers amp VI acesServle Event ff ol 1 Listeners 44 P Component Business j Model Objects i Component lt JavaBaans i Tree i EJB DO A Delegates avaBears wA Converters Dac Validators a Response Reina Resources 4 lavabeans Property Files s XML View Madal Figure 20 Model 2 structure with JSF The controller role is therefore subdivided between Faces Servlet and various listener as it is shown in Figure 20 Each view can interact with the model through the methods of its backing bean to which are delegated all the operations of data retrieval and data handling The bean therefore plays a role of mediator between the view and the application model with functionality that can be seen
38. Firewall firewallElement setAttributeNS NameSpaceRepository RDF getURI NameSpaceRepository RDF getPrefix about firewall getUri firewallelement appendChild XmlUtility createSimpleTextElement nameSpace documentParent hasName firewall getHasName firewallelement appendChild XmlUtility createSimpleTextElement nameSpace documentParent hasldentifier firewall getHasldentifier Element hasMonitorInfoElement documentParent createElementNS nameSpace getURI nameSpace getPrefix hasMonitorInfo for MonitorInfo monitorlnfo firewall getHasMonitorlnfoList if monitorlnfo null hasMonitorlnfoElement appendChild MonitorlnfoToXmlRdf createMonitorlnfoElement nameSpace documentParent monitorlnfo return firewallElement Figure 13 Example of one method that converts an object to an XML element the code is simplified It is called the method finishAndCleanDocumentXmlRdf when all the objects are transformed in XML element and added to the XML RDF document The method is responsible to add the header of the XML file finish and to escape some character written incorrectly and unnecessary At the end of the previous operations the whole document is validated in the web application before to send it to the KB and because so it is possible to avoid the multiple requests that there would be validating the XML file directly by the KB If the operation of validation does not throw any exception
39. GroupFirewall GroupExternalStorage Java Class Data Center localStorageLis hostMachineList Java Class et List Java Class LocalStorage jc 935 0C8 2 0398 5 HostMachine ee m routerList Java Class Router externalStorageList sharedStorageVolumeList X0 Java Class Java Class ExternalStorage g SharedStorageVolume E ACH g lt Java Class Firewall 0 y virtualMachineList 0 yy hasNetworkAdapterList Java Class _i Java Class l Java Class Java Class Java Class g 4 Java Class GroupVirtualMachine vitualStorageList VirtualStorage ke hasVirtualStorageList VirtualMachine M3SNetWorkAdapterList NetworkAdapter SLAction gt SLMetric 422 0 lt 0 E ET nn at ni 2 lt Ae SsIActionList 0 4iMetricList 0 icaroServiceList Java Class Java Class IcaroService ke IcaroApplication SLObjective pn icaroServiceList pn Java Class w GroupServiceMetric icaroApplicationList Java Class BusinessConfiguration 0 slObjectiveList 0 Java Class SLAgreement siAgreementList Eo Java Class User creatorList icaroTenantList Java Class IcaroTenant TT Figure 1 Domain model under Icaro Cloud Simulator iCaro La piattaforma cloud per l accelerazione de
40. HostMachine and not a single HostMachine it was considered appropriate not to include the same IP address for each HostMachine Entering data on local network which leads the HostMachine group and application e automatically generate IP addresses to be associated with the NetworkAdapter of each HostMachine e check that no two LocalNetwork inserted with the same URI and different data e Check that the availability of IP addresses of each LocalNetwork is able to meet the request of IP addresses based on the number of entities that must have a NetworkAdapter to access a specific LocalNetwork The data of each local network can be inserted through the form of Figure 26 entering the following data e networkAddress the address of LocalNetwork which is being created e subNetMask the subnet mask of LocalNetwork which is being created With this value the system can know how much IP address it is possible to generate in the new LocalNetwork iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 41 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O T sf Au eee a n A T D3 27 3 Cloud Simulator design user manual and test e urn cloudicaro LocalNetwork as just seen for the data center also in this case it must be inserted the variable part of the URI of LocalNetwork Such variable part must be unequivocal respect to other LocalNetwork e name name of the
41. HostMachine group is possible to associate an entity SharedStorage but this last must be defined in an ExternalStorage If a SharedStorage associated to a HostMachine group does not coincide with a SharedStorage created in an ExternalStorage the exception in Figure 38 is generated 7 3 Create a BusinessConfiguration As mentioned in section 8 2 3 Create XML it is possible to create a BusinessConfiguration directly from the visualization web page of a new DataCenter just created In this case the web page redirects the user directly to the form where is possible to create a BusinessConfiguration Instead clicking on the button Create a BusinessConfiguration at the top in the navigation bar on homepage Figure 21 the web application redirects the user to an intermediate page where is possible to choose a DataCenter contained in the KB in which to perform an insertion of a new BusinessConfiguration 7 3 4 Choose DataCenter In this page it is feasible to insert the IP Address and the port Figure 39 at which it is possible to find a working KB Choose dataCenter AddressiP Port Ok Back Figure 39 Insertion of the IP Address and the port of a working KB If the inserted data are correct a list of DataCenters present on KB is shown as in Figure 40 Load Choose dataCenter 192 168 0 106 8080 Change DC cegi dev ID data center CGI development URI provaCheckMode ID DataCenterDiProvaCheckMode URI dc0
42. NAGIOS server The values taken from the XML file are added to create the workloads of the HostMachines and to create also in this case the RRD files If the simulation period chosen by the user is less than the pattern period then only the first values are taken to simulation else the pattern is replicated a number of times necessary to cover the entire simulation period In this type of simulation the main problem is how to write the RRD files in fact this type of file is dependent of the file system and a RRD file written in Windows cannot be read in Linux iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 31 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test J EI IE Controller a Thread Dec T Dradac entersimulaltionk aster jS 5 Datacentercontraller DataCenterSimulatore ester map RRDp XmliRrdCaonwerber user Guest i i gt 1 liek Ett i t i z simulate 3 start i i H la loop for all Hosthtachine H i i 4 on Li moPrvimualvachine resource unit maxLimit esource VirualMachine statData currentvvorkLoadHost i Fra eraBte RR RD rdP fileName startDate step I command commandereate tn Toc getPatter value pathicHF attem resource sample To Simulates i fis ereatePatterm ValueF romFile xmlFile sampleTo Simulate i
43. Sequence Diagram In this chapter are reported the most significant sequence diagrams to show how the classes described in the previous chapters and the web pages interact with each other 4 1 Composite Component in Icaro Cloud Simulator In the JSF framework Chapter 7 it is possible to create a Composite Component CC so that it is feasible to have a new desired tag representing an object that is frequently used in the developed system In IcaroCloudSimulator there are CCs for the panels that are added on the web pages of creation of DataCenter BusinessConfiguration and VirtualMachine The CCs are organized in the folder WebContent resources panelComponent that contains one folder for each page that uses the CCs In each of these folders there is one CC for every level of panels that must be in the three web pages of creation in the DataCenter and VirtualMachine web page the maximum level of panel is two and therefore there are two CCs in the sub folders dataCenter and virtualMachine and in the businessConfiguration web page the maximum level of panel is five and therefore there are five CCs in the sub folder businessConfiguration To add a CC in a web page the simplest way is to insert the associated tag directly on the page but this is a static insertion and in the IcaroCloudSimulator the insertion must be dynamic and it must leave to user the control on how many panels there are in a determined moment on the current web page To do this the
44. Storage tcreateFE outer controllocalNetwork tgetxmlEdfoOfDatacenterFromsServer tsendxmlEdfOfDatac enterrTok Br tloadDatac enter simulate Figure 6 Two examples of controller classes 3 3 DAO Classes with DAO suffix are responsible to retrieve entities from KB In these classes there are not methods that allow adding entities in the KB because the addition of entities to KB is merely an operation of XML file generation and it is performed by the controller classes In the DAO classes there are methods that consent to interrogate the KB with SPARQL query and getting desired information about entities In Figure 7 is possible to see the associations between DAO classes Starting to DataCenterDAO this class whose methods are shown in Figure 8 can access only to DataCenter entity information or can access to information about HostMachine entities The first access is a simple SPARQL query iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 13 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test whereas the second access is formed by the first simple SPARQL query followed by other queries that attempt to retrieve information about other entities and in this case about HostMachines Analyzing methods present in each class is possible to understand because there is need of all the associations in Figure 7 E
45. a DataCenter paid J 3 beginConversation i 4 goToDataCenter i E 5 click Add nameEntity E 6 addPanelGroup nameEntity i i i 7 setFirstPanel indexPanel panelDataCenterBody group nameEntity dataCenter i 8 create nameEntity HostMachine ExternalStorage Router Firewall 11 Insert valueExpression for ListDro nameList Date Email IP Number SelectOneMenu Text 16 Insert valueExpression for Listinput nameList nameList 18 check existence getGroup nameEntity ListlInput nameList SelectOneMenuDynamic SelectOneMenuDynamicListener 20 Insert valueExpression for Listinput nameList 21 includeCompositeComponent htmiPanelParent panelComponent dataCenter firstPanel xhtml indexPanel mapValueExpression m 22 return 23 controlForButtonCreateXML 25 refresh 24 panel Inserted Figure 11 Sequence diagram that show how to add a panel to the dataCenter form iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 20 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 4 3 Create a New DataCenter XML File In the Figure 12 there is the sequence diagram that explains the operations that must be performed to create correctly the XML file of a DataCenter As first operation the user must press the button CreateXML after he inse
46. aCenter The name of the principal entity associated with the current web page The CCUtility class is so called because it is useful to fill the attributes of the CCs and to add it in the current web page In fact once that the method setFirstPanel is called this creates a map that associates the name of an attribute contained in the CC to the value that the attribute must have To fill the map the method checks on the class StaticAttributesRepository the existence of some method containing the name of entity associated to the panel that must be added The methods in StaticAttributeRepository class are named in such a way that it is possible to simply associate them to the attributes of the CCs see Figure 10 If the method exists none exception is generated and the name of the method is associated with the correct attribute presents in the CC For example in the stage of filling the attributes of the CC of groupHostMachinePanel the method setFirstPanel through the method setDefaultAttributes that in turn uses the method setOneStaticAttribute checks if there is a method named getGroupHostMachineListInputText in the class StaticAttributeRepository as it is possible to see in Figure 10 this method exists and its name is inserted in the map associated to the istinputText attribute In Figure 11 it is possible to see the interactions between the classes and the control operations performed at first for the attribute istDropDownMenu then for a
47. ach DAO class has similar methods to DataCenterDAO In fact in each class there is a method such as getURIDataCenterListByKB that allow retrieving a list of URI of desired entities present in the parent entity For example the parent entity of a HostMachine is the DataCenter and in the class HostMachineDAO there is the method getURIHostMachineListbyDataCenter Java Class Data Center i use ee se l i 0 yy hostMachineList Java Class X Class Java Class XmlSparqlToDataCenter lt Dz See EP dtd asina MR A Md HostMachine Use _ l rn i lt 58 LSBs lt Re FTE V ERNEUT RIE R ROL FeO ANDES RIETI S ARE TET lt 57 0 WwirtualMachineList MET Java Class Java Class Java Class VirtualMachine lt HostMachineDAO XmlSparqiToHostMachine e use E I e PC eee a ce na usen cL l ES 0 J icaroServiceList Java Class a Java Class XmlSparglToVirtualMachine Lc Virtu gt IcaroService CE TTT use E i ioaroServiceList p USB umuumummumumuuummumuuuumumuumumumumuumumumuuumumumumummuuumumumuuumummumumm n Java Class Java Class es Java Class i i E lt LSPbs IcaroApplication iii Ic AU SCIVICE JPA SEPP eee
48. ach entity in Figure 64 there are 3 curves because 3 selected entities are the same metric KBSIM CPU AVG 5min The button Reset Zoom take back the chart to its original resolution The Filled checkBox fills the underlying area of each curve that in Figure 64 is transparent The Stacked checkBox sums the contributions of each curve realizing a graph with accumulated data The last three buttons Hourly Daily e Monthly are used to scale the graph resolution to have a better view on the trend data iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 67 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 8 References 1 Cloud computing state of the art and research challenges Q Zhang L Cheng R Boutaba s l Journal of Internet Services and Applications Vol 1 pp 7 18 2 Cloud computing Issues and challenges T Dillon C Wu and E Chang Perth IEEE 2010 Advanced Information Networking and Applications AINA 2010 24th IEEE International Conference on pp 27 33 3 Challenges towards Elastic Power Management in Internet Data Centers J Liu F Zhao X Liu and W He Montreal Quebec Canada s n 2009 Workshop on Cyber Physical Systems WCPS 4 GreenCloud A Packetlevel Simulator of Energy aware Cloud Computing Data Centers D Kliazovich P Bouvry S U Khan 3 s l Journal of Supercomputing
49. achineSimulator icaroServiceSimulatorList Jo Java Class kearoServiceSimulator gaussianGeneratorStorage w0 1 0 1 Java Class 0 1 Lr tt GaussianGenerator ke gaussianGeneratorCPU gaussianGeneratorMemory Figure 9 Simulator Classes Architecture The right part of the Figure 9 represents the classes that perform the real time simulation there are a central class DataCenterSimulationRealTime that is responsible to start they are runnable classes one HostMachineSimulator for each host machine presents on the data center that must be simulated a HostMachineSimulator class that is responsible to start one VirtualMachineSimulator for each virtual machine presents on the data center that must be simulated and so on until the IcaroServiceSimulator class that is responsible to randomly generate the workload values Furthermore there are a DataCenterSimulatorMonitor class that is responsible to update the CartesianChartModel which class is associated to chart viewed from the user and a DataCenterMetricSender class whose purpose is to send the metrics calculated on the generated values to the KB In future the metrics must be sent to the NagiosServer as the metrics generated by the fast simulation iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 16 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 4
50. alMachine that must be simulated see Figure 61 If the user does not associate any pattern to some VirtualMachine the patterns are associated randomly to the VirtualMachine without a pattern Simulate Data Center TEST 022 Faster 2015 03 19 10 16 06 7 nagios nagios 192 168 0 103 22 usr local pnp4nagios var perfdata Simulate Back an hostTest0120141118T152919 VirtMach0420141118T160123 VirtMach0520141118T160123 carene VirtMach0120141118T160123 Choose Pattern Choose Parem Choose Pattern hoosi Patern Choose Pattern Figure 61 In this page it is possible to associate one pattern to each VirtualMachine to simulate iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 65 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test When the user clicks on the Choose Pattern button a modal dialog is shown to the user where he can choose the pattern viewing the chart related to the pattern that he is choosing are shown the charts related to the patterns of all resources collected from one machine at the same time see Figure 62 Simulate Data Center TEST 022 Faster 2015 03 19 12 19 40 7 nagios nagios 192 168 0 103 22 usr local pnp4nagios var perfdata Simulate Choose Pattern for VirtMach0120141118T160123 20150318T164634 eclap bp64net eclap eu runningQ192 168 0 132 SNMP WIN V
51. aro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 30 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O Ay c Pa M c PL quae ior pat res c D3 27 3 Cloud Simulator design user manual and test The refresh time is chosen by the user but knowing that a HostMachineSimulator updates its workload each four seconds it does not make sense to go below this threshold DataCenterSimulatorMonitor thread can extract the values of the HostMachine workload because when it was started the DataCenterSimulationRealTime class passes to it the list of the HostMachineSimulator threads started Furthermore the user can decide in any moment to send metric of the generated workload to the KB inserting the KB address IP and Port and the sampling period In the future works these metrics will be sent to the Nagios Server as RRD files Round Robin Database and pressing the button SendToKB The system when the button is clicked calls the method startSendToKB in the DataCenterSimulationRealTime class that starts one thread based on the DataCenterMetricSender class This thread at the period indicated by the user samples the workload values from all HostMachineSimulator and VirtualMachineSimulator running threads creates the XML file with all the necessary information needed to the KB to insert correctly the metrics To improve the performances before are sampled the metrics of all the resources simulat
52. asAuthUserPassword Insert password of host Figure 10 Example of one method containing the values to fill the attributes of a CC In Figure 10 it is possible to see an example of a method contained in the StaticAttributeRe pository class This method is responsible to create the list of inputText that accept every type of text that must be present in the panel of the entity GroupHostMachine InputTextHtml5 is a class that is useful to fill the attributes of a CC representing a Bootstrap style InputText contained in the panel For this class the first string is the label that must have the InputText the second string is the name of the field contained in the object indicates by the objectLinkToPanel that must be filled with the value inserted in this InputText and the last string is the placeholder that is shown if nothing is inserted in the InputText 4 2 Add a new panel to Create a DataCenter web page The sequence diagram in Figure 11 is an example that represents how it is possible to add a new panel in an existing form in this case a dataCenter form and it shows how the methods of a viewer class work to perform this operation Furthermore the few operations that must be performed each time that the user changes page are shown The operation starts when the user click the link Create a DataCenter on the page home jsf and he is redirected on the page dataCenter jsf This page at the generation of the event preRenderView calls
53. at are associated to the network then the exception in Figure 36 is generated Exception The Local Network urn cloudicaro LocalNetwork LNet01 has NetworkAddress 192 168 0 1 has SubNetMask 255 255 255 0 There is another Local Network with the same URI but has NetworkAddress 192 168 0 0 has SubNetMask 255 255 255 0 Figure 37 Exception generated if two localNetwork with same URI and different information are inserted If a user wants that two HostMachine groups are in the same LocalNetwork he must insert in each group the same LocalNetwork and the same data If during this insertion the two LocalNetwork have the same URI they will be considered the same network from the application and IP addresses and subNetMask should be the same to not generate the exception in Figure 37 Exception There is a problem with consistency of inserted informations Check the URI of SharedStorageVolume of ExternalStorage and the URI of useShareStorage property of HostMachine Figure 38 Exception generated if a SharedStorage associated to a HostMachine it is not created in one ExternalStorage iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 48 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test As the previous the last exception that can be generated checks that data inserted in two different form matches between them At each
54. ataCenter dataCenter getHostMachineList add hostMachineDAO fetchHostMachineByURI ipAddressOfKB uriHostMachine LocalNetworkDAO localNetworkDAO new LocalNetworkDAO for String uriLocalNetwork localNetworkDAO getURILocalNetworkListByDataCenter ipAddressOfKB uriDataCenter 1 dataCenter getLocalNetworkList add localNetworkDAO fetchLocalNetworkWithUsedIPByURI ipAddressOfKB uriLocalNetwork return dataCenter Figure 15 Comparison between get and fetch methods to retrieve a DataCenter by the URI iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 26 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Q allo Controlero Repository Class aPersisitence Persistence Persistence aPersistence aPersistence aPersistence Fersisitence Utility Utility Converters X dataCenterChoice jst DataCenterControlter DynamicAttributeRepository HostMachineDAO MonitorinfoDAG NetworkAdapterDAO LocalStorageDAO VirtualMachineDAO KBDAO ReslAPI HtlpClient XmlSparglToDataCenter user Guest 1 1 1 eventually changes P Address of KS 2 click OK 21 chooses a dataCantar on list L 22 click toag 3 invertiPinserted 23 loadDataCenter etDataC antarChoiceSelactOneManu 18 datacenter st 19 InputTextSelectOneMe
55. ates the object that must be filled with the information inserted in the current panel iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 17 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test e bindingToBody creates a binding between an object in the Viewer classes and the current CC to add new child To avoid the creation of one method for each panel that can be inserted in the web page and to avoid method duplication due to possibility that one panel can be added to two or more different parent panel the creation of CC is performed as described in section 5 2 Note that StaticAttributeRepository and DinamicAttributeRepository classes are created to group all the possible values for the attributes in one single point to maintain and to change them more efficiently public List lt InputText gt getGroupHostMachineListInputText return new ArrayList lt InputText gt Arrays asList new InputTextHtml5 prefixName hasPrefixName Insert prefixName of host new InputTextHtml5 prefixIdentifier hasPrefixIdentifier Insert prefixIdentifier of host new InputTextHtml5 CPUType hasCPUType Insert the type Model of each CPU in the host new InputTextHtml5 domain isInDomain Insert domain of host new InputTextHtml5 username hasAuthUserName Insert username of host new InputTextHtml5 password h
56. ble V1 0 K K K K View View View View iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 64 di 69 D3 27 3 Cloud Simulator design user manual and test In the Figure 59 it is possible to see how the collected real data are shown they are divided in tabs based on the day in which they are collected in each tab there is one panel for each checked machine and in this last panel there is a variable number of panel In fact in the first tab there are four sub panel one for the data with period one day one for the data with period seven days one for the data with period 30 days and one for the meta data In the second tab there is only one sub panel that for the data with period one day due to the fact that the collection is performed each day at the same time and the data with period seven days are collected each seven days i e each seven tabs eclap co db gt running l 1428 68 15 5HMP WIN CPU AVG 13 13 14 15 18 17 El Avg 2 9887 Last 19 2006 Max 4 59769 A Average D warning to B critical 0 Default Template Command clveck snap lead pl Figure 60 Example of a chart relative to real data collected The user can click on the View buttons to view the charts associated to the real data collected see Figure 60 If the real data are present in the file system the fast simulation can be performed and it is possible to associate one pattern to each Virtu
57. chine entity When the DataCenter is loaded with all the associated entities it is shown at the user that can choose another DataCenter or he can press the Next button to pass to another operation which will be performed in the chosen DataCenter iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 28 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 5 Simulation The classes that perform the simulation are described in the section 4 4 and in this chapter will be detailed the operations that must be performed to simulate the chosen DataCenter in the two kinds of simulation offers by Icaro Cloud Simulator 5 1 Real time simulation In this type of simulation the values are generated in real time so five minutes of the simulation correspond to five minutes of metrics that it is possible to insert in the KB At the moment to realize this simulation one thread is created for each entity involved in the simulation i e each thread for each HostMachine each VirtualMachine and each IcaroService Missing the models to represent the workload of the entities It is a future work the mechanism that at the moment allows the simulation is the following that it is possible to see in Figure 17 e When the user presses the button Start the system calls the method startSimulation of the class DataCenterSimulationRealTime e This method
58. cking on button Add is possible to add further entities optional or mandatory to file creation Figure 42 to BusinessConfiguration The button Clear which is positioned at the top on the navigation bar in Figure 23 allows resetting all filled forms once pressed will not be possible to recover the data inserted The button Back which is positioned at the top right on the navigation bar in Figure 23 allows returning to web page in which it is possible to change information about VirtualMachines iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 53 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test From this point is shown how is possible to add entities to BusinessConfiguration starting from IcaroApplication entity that it is mandatory to the creation of XML file 7 3 3 IcaroApplication The form that allows adding an caroApplication entity to BusinessConfiguration is visible in Figure 45 mS 1 IcaroApplication name IcaroApplicaton Test identifier IAPP capacity a typeOfApplication Joomla Figure 44 Creation form of an IcaroApplication entity The information that must be inserted is e name name of caroApplication e identifier identifier of caroApplication e capacity generic capacity of each caroApplication e typeOfApplication it is possible to choose what kind of caroApplication mu
59. e followed by a number that identify the group itself and the entity in the group e prefixldentifier identifier that must have the entity is being created As the entity hostMachine the text inserted will represent the prefix of the identifier followed by a number that identify the group itself and the entity in the group e model the mode p es Cisco xxxx WesternDigital 12345 of the entities that is being created e Entity the number of entity that the user want create with the features inserted in other e monitorState it shows if the monitor is on or off on each HostMachine It is possible to choose between these values Enabled indicates a working monitor and Disabled indicates a no working monitor iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 43 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test 1 GroupExternalStorage Monitor Info prefixName ExtStoTest Local Network prefixidentifier EST Shared Storage model Seagate External Storage 15 monitorState Enabled 1 GroupFirewall Monitor Info prefi xName FireWi Local Network prefixidentifier FT model Cisco Firewall J monitorState Enabled z mE 1 GroupRouter Monitor Info prefixName Route Local Network prefixidentifier RT model NetGear Router 12 monitorState Enabled Figure 29 Creation for
60. e 54 Page of the real time simulation In the page it is possible to see some panel that will be filled with graph once that the simulation start At each panel is associated a HostMachine and in the header is indicated how many VirtualMachine are present in the HostMachine relative to that panel To start the simulation the user must clicking on the button Start When the simulation is started in the page appear the graphs relative to simulation data and the button on the navigation bar are modified as in Figure 55 J RS f MALA emm a cere Figure 55 DataCenter simulation with graphs of CPU Memory and Storage iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 62 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test In the three graphs it is possible to see the trend of the simulated data of CPU Memory e Storage related to a single HostMachine Charts are updated every 5 seconds with auto refresh of the page The button Stop allows stopping instantly the simulation The form that follows the Stop button allows choosing a KB by inserting IP address and port of a running KB and the time by which the simulated data is sampled and sent to be included in the choice KB The timestamp that will be inserted in the metrics sent to KB is reported at the tim
61. e that these are sampled Figure 56 Simulation page with form to add VirtualMachines The button Create a BusinessConfiguration if clicked at the moment shows a form for the insertion of VirtualMachine Figure 56 and then a form for the insertion of BusinessConfiguration Figure 57 The control logic that allows adding the entities dynamically to the simulator must be projected yet Figure 57 Simulation page with form to add BusinessConfiguration 7 5 2 Fast Simulation This type of simulation is useful when the user needs a tool to replicate past data of a real DataCenter in a selected simulated DataCenter This simulation runs in a different way respect to the operation of Create ServiceMetrics iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 63 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test RR e Generates the metrics for all entities belonging to the selected dataCenter rather than generates them for a single entity e Generates the metrics with a period of 5 minutes instead to distribute them evenly in the indicated period e tis not provided limits to values that can be assumed form the metric and it is not present a final value e The metrics are taken from real data previously collected If any real data is collected IcaroCloudSimulator shows the alert message which is possible to
62. ed and after only one XML file are sent to the KB 5 2 Fast simulation In this type of simulation the values are generated as quickly as possible depending on the machine where the IcaroCloudSimulator is executed The values in this case are generated from real data that are collected from various machine Host and Virtual of a real DataCenter with the periods of one day seven days and 30 days and that are saved in XML files The user can see and associate a real pattern to one VirtualMachine whose workload must be simulated to associate a pattern to a VirtualMachine means that all the values simulated for the VirtualMachine for all resources as CPU disk and storage are taken from the XML collected at the same period from the same VirtualMachine so that it is possible to maintain the correlation between the workloads of different resources If the user does not associate any pattern to one or more VirtualMachines then the patterns are randomly chosen between those collected When the user clicks the button start the system calls the method simulate in the DataCenterController class that initializes one thread based on the class DataCenterSimulatorFaster see Figure 18 The thread for each VirtualMachine contained in the DataCenter takes the values from XML file containing the pattern associated by the user or randomly to the VirtualMachine that must be simulated and with these values it creates a RRD file so that it can be read by the
63. ed on the form in Figure 23 will be generated the following URI urn cloudicaro HostMachine Test 012 HMO1 urn cloudicaro HostMachine Test 012 HMO2 urn cloudicaro HostMachine Test 012_HM010 Other fields must be filled with following information e prefixName prefix name of all HostMachine that will be created by this form At the prefix as do for the URI will be added a final number indicating the HostMachine in the group e prefixldentifier prefix identifier of all HostMachine that will be created by this form At the prefix as do for the URI will be added a final number indicating the HostMachine in the group e CPUType the type of CPU that is installed in each HostMachine of the group e g Intel Xeon e domain domain within which are situated the host machines At the moment when this document is written the KB accepts as value for domain DCO1 Figure 24 e username the username to access at the host machines It will be inserted identical for all the HostMachine in the group e password the password to access at the host machines It will be inserted identical for all the HostMachine in the group e di Host number of HostMachine that will be created with all features inserted in the other fields e CPU number of CPUs in each HostMachine e CPUSpeed speed in GHz of each CPUs inserted in the previous field e memorySize size of principal memory RAM in GB in each HostMachine e capacity generic capacity of eac
64. etsendForm rue 5 reest amp evenlually changes KB Address IP E i 8 senimiRgfomataCemterToKB 9 hideSendF arm ho sandimT Bp PUT ipOfKB dataCanter locallnDataCenter created lmiRdiDataCentor 11 bene SIN PUT OMAP wtar pass ciis UngioSend pocketing charset 2112 putRequestBasicAuth httpClient restAPIURI user pass typeOtString charset 13 execute hltgPr LE responseMessageString g Bescesssisesessessicesscesssscessresersssss a die iii i 15 esponseMessagestnng T 20 see into about send i e ok emor Figure 14 Sequence diagram that show how the XML file of a DataCenter is sent to the KB iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 25 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Taking the information from the KB to create the list of the DataCenter it is performed as follows e The getURIDataCenterListByKB method is called to retrieve the list of the URI of each DataCenter contained in the indicated KB e Forall URI in the previously created list it is called the method getDataCenterByURI that retrieves only simple information about the DataCenter That does not involve other entities as it is possible to see in Figure 15 Only name and identifier are retrieved o The query to send
65. for each HostMachine contained in the chosen DataCenter starts a thread based on the HostMachineSimulator class e Each HostMachineSimulator thread for each VirtualMachine contained in the HostMachine associated to this thread starts a thread based on the VirtualMachineSimulator class e Inturn each VirtualMachineSimulator thread for each IcaroService run in the VirtualMachine associated to this thread starts a thread based on the IcaroServiceSimulator class This last class is responsible to generate the workload for each IcaroServiceSimulator thread every second it updates the three variables that represents the CPU the memory and the storage workloads respectively in Mhz GB and in GB with random values generate by three Gaussian Generators In the future works it will be replaced by another generator At the moment the simulator does not consider the workload caused by the OS or the hypervisor Each VirtualMachineSimulator thread every two seconds updates its three variables which represent the workload adding the workload generated by the IcaroServiceSimulators associated to IcaroServices that run in the VirtualMachine associated to the considered VirtualMachineSimulator In a similar way each HostMachineSimulator thread every four seconds updates its three variables adding the workload generated by the VirtualMachineSimulators associated to VirtualMachines contained in the HostMachine associated to the considered HostMachineSimulator
66. group is sited that is this field indicates the URI of HostMachine where the VirtualMachine group runs iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 51 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test NEL e isStoredOn indicates where the VirtualMachine group is stored in the HostMachine selected in the previous field It is possible to choose either a LocalStorage or a VirtualStorage associated to previous selected HostMachine As for the HostMachine also in this case is not necessary to insert the URI of every VirtualMachine of the group Being a multiple entry the URI is generated automatically and it is based on the name of DataCenter and the HostMachine where the VirtualMachine is sited the number of VirtualMachine contained by the group For example if a VirtualMachine group is generated with the information contained in the form of Figure 41 the URI that will be generated urn cloudicaro VirtualMachine Test OneHost_HM01_VMO1 urn cloudicaro VirrualMachine Test OneHost HMO1 VMO2 urn cloudicaro VirtualMachine Test OneHost HMO1 VMO5 As for the other entities also for the VirtualMachine is possible to associate sub entities as MonitorInfo LocalNetwork e VirtualStorage Figure 42 1 VirtualMachine Monitor Info externallPAddress Local Network monitoringlPAddress Virtual Storage Figure 42
67. guration in the KB is different 7 3 4 1 Exception in XML file generation In the previous section it was stated that the web application must check if two creators are inserted to e g one on the businessConfiguration and one on icaroApplication e Avoid that two user exist with same URI and different name and or email In the case that the check fails i e two Users Creators exist with the same URI and different name and or email The message in Figure 50 is shown Exception The User urn cloudicaro User admin has Name Administrator has Email admin icaro it There is another User with the same URI but has Name Admin has Email admin icaro it Figure 50 Exception generated if two creations with same URI and different information are inserted The user read the message can return to previous page to make necessary changes to avoiding that error message is already shown 7 3 4 2 Exception in XML file insertion to KB As mentioned at the beginning of section 8 3 3 1 Icaro Service each IcaroApplication needs services to work and if these services are not inserted then the system will warn user through red alert message to this lack Such messages unlike the exceptions that are generated by the system are generated during the insertion of the file within the KB as they concern the rules included in the KB and not in the XSD SCHEMA for generating XML file iCaro La piattaforma cloud per l accelerazione del business del
68. gure 25 and the information that must be included is e metricName name of the metric that SM must keep under control e arguments whatever it may be useful to control performed by e warningValue value that can trigger actions to prevent problems if reached by the metric e criticalValue value that can trigger actions to prevent problems if reached by the metric e maxCheckAttemps number of attempts that must be performed on the value of the metric before taking corrective action iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 40 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test e monitorState it shows if the monitor is on or off on this Monitorlnfo It is possible to choose between these values Enabled indicates a working monitor and Disabled indicates a no working monitor e checkMode it shows how the control must be performed It possible to choose two values Passive e Active a 1 Monitorinfo metricName avgCPU arguments nessuno warningValue 85 criticalValue 70 maxCheckAttemps 20 monitorState Enabled checkMode Passive Figure 25 Creation form of a MonitorInfo entity 7 2 1 2 Local Network Each host machine can have one or more network adapter they vary according to number of local network to which host machine is connected Given that the system will generate a group of
69. h HostMachine e operatingSystem operating system installed in each HostMachine e monitorState it shows if the monitor is on or off on each HostMachine It is possible to choose between these values Enabled indicates a working monitor and Disabled indicates a no working monitor iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 39 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O T i PEE Au i Ta D3 27 3 Cloud Simulator design user manual and test 1 GroupHostMachine Monitor Info prefixName hostTest Local Network prefixidentifier HSTT Local Storage CPUType Intel Xeon INE ONIS domain DCO01 username root passw ord MALE Host 10 CPU dz CPUSpeed 2500 memory Size 128 capacity 100 operatingSystem Red Hat monitorState Enabled Figure 24 Creation form of a hostMachine group Each HostMachine can has associated entities and in the following sections it is possible to see what entities can be added 7 2 1 1 Monitor Info This entity represents useful information for the SM that must monitor the metrics of real host machine present on data center With the creation of the group of host machine at each HostMachine belonging to group will be associated an own Monitorlnfo entity with the same information of the other The form for the insertion of a monitorlnfo entity is what it can be seen in Fi
70. he same URI have also the same information In fact when the data is inserted in this form a user entity is generated and this last will be associated to other entity to realize the property hasCreator Furthermore if the inserted user is a creator for two caroApplication then the system must control that don t exist two User with the same URI and different name and email In the previous section are described the information and the entities necessary to creation of an entity caroApplication in a BusinessConfiguration Beyond such entity it is possible to add in a BusinessConfiguration the entities SLAgreement and Creator whereas such entities have the same form of entities that it is possible to add to an icaroApplication it is recommended to see the previous sections to know how insert such information in the form iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 58 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test 7 3 4 Create XML Concerning the creation of the XML file of the BusinessConfiguration inserted and the page that is accessed once created this file you can see 8 2 3 Create XML on the creation of the XML file of a DataCenter The only changes are that in the navigation bar is not present the link to create a new BusinessConfiguration and the REST API which is called for the inclusion of the BusinessConfi
71. he values are replicated by the past values collected from real hostMachines present in a real dataCenter These differences explain the architecture in Figure 9 The left part of the Figure 9 represents the classes that perform the fast simulation there are a central class DataCenterSimulationFaster that is responsible of the simulation a NagiosServer class that contains information about the host where the simulated values will be sent and a DataCenter class that represents the data center that must be simulated NagiosServer 39losServer DataCenterMetricSender 1 0 1 Java Class Java Class z gt dataCenterSimulator 0 1 nagiosServer 0 1 0 1 dataCenterMetricSender cartesianChartModelStorageList a Java Class DataCenterSimulationRealTime Java Class c Java Class c lt cartesianChartModelCPUList dataCenterSimulatorMonitor DataCenterSimulatorMonitor gt CartesianChartModel 0 1 _ m sprona 0 Java Class ne e 5 Java Class dataCenterController DataCenterSimulatorFaster le dataCenterSimulatorF aster em 0 1 i T cartesianC 0 hostMachineSimulatorList w0 Java Class 0 HostMachineSimulator Le DLL hostMachineSimulatorList rpes ses dataCenter y 0 1 Jaya Class DataCenter virtualMachineSimulatorListy 0 Java Class VirtualM
72. in the group e Virtual number of VirtualMachine that will be created with all features inserted in the other fields e CPU number of CPUs in each VirtualMachine e CPUReservation minimum speed in MHz reserved for each CPU that is inserted in the previous field e CPULimit maximum speed in MHz reserved for each CPU that is inserted in the previous field This limit can be set according of how much CPU is used by all VirtualMachine present in a HostMachine e memorySize indicates the maximum theoretical memory physically present in the HostMachine that can be used from every VirtualMachine on the group e memoryReservation indicates the minimum memory physically present in the HostMachine reserved for every VirtualMachine on the group This memory is always available for each VirtualMachine and it does not depend on the other VirtualMachine that runs on the same HostMachine e memoryLimit indicates the maximum practical memory physically present in the HostMachine that can be used effectively by the VirtualMachine This value depends on how much memory is used from the other VirtualMachine that runs on the same HostMachine e operatingSystem number of CPUs in each VirtualMachine e monitorState it shows if the monitor is on or off on each VirtualMachine It is possible to choose between these values Enabled indicates a working monitor and Disabled indicates a no working monitor e arePartOf indicates where the VirtualMachine
73. in the panel is passed to these classes to generate the XML file after a check on the data entered As already mentioned in each viewer class are present methods that add panels Each of this method has a particular name as it s possible to see in Figure 4 formed by the prefix addPanel the name of the entity associated with that panel and the name of the entity associated with parent panel If an entity is associated with the principal panel the name of parent panel is null and it is not inserted on the name For example GroupHostMachine is a principal entity and the method that can add a panel for this entity is addPanelGroupMachine Instead Monitorinfo is a secondary entity and must be specified in which panel it must be inserted this information can be extracted from the parameters passed to function the object htmlPanelParent that represents as the name suggests the parent panel on which the new panel must be added and the index of it iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 10 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Java Class InputTextHtml5 use Java Class InputText E LU EE use listSelectOneMenu Java Class i NES InputTextSelectOneMenuks lessssssssssecasasne _ rrrr r i a a use iss Java Class
74. ine on which insert caroService it is explained how to create a BusinessConfiguration through the form that it is possible see in Figure 43 Create a BusinessConfiguration Clear Add gt Greate XML Icaro Application sLAgreement ate XML button you must Creator oApplication to BusinessConfiguration urn cloudicaro BusinessConfiguration TEST 007 hasName Business Configuration Test 007 hasldentifier BCOO7 hasContracild C123456789 Figure 43 Principal creation page of a Business Configuration Through the form of Figure 43 it is possible to insert information about a BusinessConfiguration e urn cloudicaro BusinessConfiguration the KB is realized through an ontology and in this kind of database each entity is unequivocally identified by URI With regard to BusinessConfiguration the URI prefix is always the same but the final part is variable and it can be chosen by the user inserting it in this field e hasName name of BusinessConfiguration e hasldentifier identifier of BusinessConfiguration e hasContractld represents the id of associated contract to BusinessConfiguration This id is useful to know the user that signed the BusinessConfiguraion As it is possible to see in Figure 32 this information is not sufficient for creation of a BusinessConfiguration the yellow alert indicates the other entities that must be inserted necessarily to create the BusinessConfiguration XML file that is being created Cli
75. ion N B When the user clicks on the button Next it is considered as current dataCenter on which to insert the new BusinessConfiguration the last that was retrieved through the button Load To select a DataCenter from the list without clicking the button Load it does not retrieve the DataCenter and it is considered as current DataCenter the last DataCenter for which the button Load is pressed For this reason when the list of dataCenter appears the button Next is not visible until a dataCenter is loaded from KB 7 3 2 Create Virtual Machine Once a DataCenter is chosen and retrieved from the KB it is possible to create the new BusinessConfiguration To do this uppermost the VirtualMachines at which the services should be installed must be Add VirtualMachine Next To activate the next button you must Add to each virtualMachine at least one virtualStorage 1 VirtualMachine Monitor Info externallPAddress Local Network monitoringlPAddress Virtual Storage prefixName VirtMachT prefixidentifier VMT domain DCO1 username root password XXXX Virtual 9 CPU 1 CPUReservation 800 CPULimit 2000 memorySize 6 memoryReservation 1 memoryLimit 2 operatingSystem Ubuntu monitorState Enabled arePartOf urn cloudicaro HostMachine TEST 012 HMOS isStoredOn urn cloudicaro LocalStorage TEST 012 HMOS LSO Figure 41 Creation form of a VirtualMachine group iCaro La piattaforma cloud pe
76. ke object associated to view and it is the same for the simulator classes described in the following sections An example about methods that user can find in the controller classes is possible to see it in Figure 6 iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 12 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Java Class VirtualMachine Java Class Java Class CartesianChartModel Series ChartSeries Java Class mE AnalyzeMetricsMenuTree o 0 i inscia 0 catasianChart Made virtualMachineList Java Class VirtualMachineController mapLocalNetworkController mapLocalNetworkController Java Class 0 LocalNetworkController Ld _ 14 amp gt sr irtualMachine Controller Java Class BusinessContigurationController _ _ rm dataCenterCntrollerq 0 1 Java Class dataCenterController_ Java Class 0 LN uL p AnalyzeMetricsController 0 1 DataCenterController dataCenterController Lidl groupHostMachineList groupExtemalStorage yO dataCenter yo 1 0 J groupRouter 0 0 1 Java Class Java Class Data Center GroupRouter dataCente Jaya Class AnalyzeWorkl oadController GroupHostMachine groupF
77. l business delle PMI toscane Pagina 8 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test nana d aT PhysicalThing is a J lt Con AxcpScheduler CLD js a StorageServer A Ab lisa IcaroApplicationModule AxcpGridNode y is ApacheWebServer ApacheTomcat a m WebApplicationServer 3 js a HttpBalancer OperativeSystem P is a AR dum S 4 U a lt Administrator Figure 2 Ontology under Knowledge Base iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 9 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 P m AE ta A IR a prin a e m E sd D3 27 3 Cloud Simulator design user manual and test 3 Architecture In this chapter is described the architecture of classes belonging to Icaro Cloud Simulator The framework JSF was used see chapter 7 to develop this system because it allows e A separation between the application logic and the presentation layer e To write the system with Java and so it is possible to find some useful library to perform operations required by the tool e Simple develop of the web interface with reusable component called Composite Component https docs oracle com javaee 7 tutorial jsf advanced cc htm GKHXA e Use of the Expression Language https
78. le PMI toscane Pagina 59 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Error Response Code 400 Reason Bad Request Check IcaroAp ication needs cardinality Application urn cloudicane XLMS TEST 007_07 not needs exactly 1 oT icrapacheTom iat has o check IcarcAppiicalion needs cardinality Application funnicicudicare LMS TEST D07_0 app ALMS does nol meeds exactly 1 of icr AxcpScheduler has 0 check IcareApplicalion needs cardinalily Application urn cloudicaroxLME TEST O007 Mapp ALMS does nol needs exactly 1 of icr MySQL has 0 check Icaro amp pplication needs someValuesFrom Application urn cloudicaro XLMS TEST 007 0 app XLMS does not needs min 1 of icr AxcparidHode has Figure 51 KB message to notify the missing icaroService necessary to XLMS icaroApplication For this reason the system show a message like the one in Figure 51 in response to the attempt to send an XML file containing a BusinessConfiguration to the KB In the file there is an icaroApplication of type XLMS without the needed services 7 4 Create ServiceMetrics This operation allows creating a predefined number of metrics that must be associated with a determined entity e g a HostMachine or a VirtualMachine deciding the period in which they are to be distributed The values that should have d
79. ll the attributes whose name starts with listInput before those that are in the StaticAttributesRepository and after those that are in the DynamicAttributesRepository Once the map is filled the method includeCompositeComponent is called and it is responsible to retrieve the file xhtml containing the CC to fill the attributes in the CC with the values contained in the map and to add the CC created in the parent panel At the end of this chain of operations and calls the DataCenterViewer class checks if all panels necessary to create a DataCenter XML file are inserted in the web page with the method controlForButtonCreateXMLand in any case the web page is refreshed to show the new panel to the user If the control succeeds then the necessary panels are inserted and the button CreateXML is enabled to allow the user to create the XML file with the inserted information The operations to create the XML file are described in the next section iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 19 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Ul Ul Controller Controller Controller Repository Class Repository Class Object home jsf dataCenter jsf Navigator DataCenterViewer CCUtility StaticAttributesRepository DynamicAttributesRepository mapValueEspression Map user Guest j 1 click Create
80. llowing information about the desired dataCenter e urn cloudicaro DataCenter the KB is realized through an ontology and in this kind of database each entity is unequivocally identified by URI With regard to DataCenter the URI prefix is always the same but the final part is variable and it can be chosen by the user inserting it in this field iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 37 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test e hasName in this field is possible to insert the name that the user want to assign to the data center that is being created e hasldentifier it is possible to associate an identifier to data center and user can do it using this field As it is possible to see in Figure 22 this information are not sufficient to create a DataCenter the yellow alert indicates other entities that necessarily must be inserted to create a representative XML file of just created DataCenter Clicking on button Add is possible to add further entities optional or mandatory to file creation Figure 23 to DataCenter The button Clear which is positioned at the top on the navigation bar in Figure 23 allows resetting all filled forms once pressed will not be possible to recover the data inserted The button Back which is positioned at the top right on the navigation bar in Figure 23 allows returni
81. move String indexPanelParent int indexPanelToRemove int tremovePanelLocalNetworkGroupRouter idPanelParent String idPanelToRemove String indexPanelParent int indexPanelToRemove int addPanelMonitorinfoGroupHostMachine htmlPanelParent HtmlPanelGroup indexPanelParent int addPanelMonitorinfoGroupExternalStorage htmlPanelParent HtmlPanelGroup indexPanelParent int addPanelMonitorinfoGroupFirewall htmlPanelParent HtmlPanelGroup indexPanealP arent int taddPanelMonitorinfoGroupRouer htmlPanelParent HtmlPanelGroup indexPanelParent int removePanelMonitolnfoGroupHostMachine idPanelParent String idPanelToRemove String indexPanelParent int indexPanelToRemove int removePanellonitorinfoGroupeExternalStorage idPanelParent String idPanelToRemove String indexPanelParent int indexPanelToRemove int removePanelMaonitarlnfoGroupFirewall idPanelParent String idPanelToRemove String indexPanelParent int indexPanelToRemove int removePanelMaonitorInfoaGroupRouter idPanelParent String idPanelToRemove String indexPanelParent int indexPanelToRemove int Figure 4 Class DataCenerViewer and its methods iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 11 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O AA z lc Pa m C PL qn ao ior pat res c D3 27 3 Cloud Simulator design user manual and test lt a Each panel that is possible to add at the web
82. ms of ExternalStorage Firewall and Router groups For entities that can be added as Monitorinfo and LocalNetwork it is possible to see the description in the previous paragraphs about entities associated to HostMachine more precisely the paragraphs 8 2 1 1 Monitor Info and 8 2 1 2 Local Network 7 2 2 1 Shared Storage As already seen in 8 2 1 4 Shared Storage it is possible to associate to each HostMachine a SharedStorage inserting in the creation form of a HostMachine group the URI of a SharedStorage In ExternalStorage form it is possible to create the entity SharedStorage because this last must necessary be part of an ExternalStorage The form for the creation of this entity is in Figure 30 iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 44 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test aM 1 SharedStorage urn cloudicaro SharedStorageVolume SharsStorage01 name sharedSto01 identifier S501 diskSize 5000 Figure 30 Creation form of a SharedStorage entity As it is possible to see the data inserted are the same of an entity LocalStorage with the addition of the URI necessary to associated it to a HostMachine The data that must be inserted are 7 2 3 urn cloudicaro SharedStorageVolume URI of the SharedStorage that it can be associated to a HostMachine Each ExternalStorage will be
83. n of these last entities in the method createHostMachineElement are called the methods createMonitorInfoElement and createNetworkAdapterElement that perform insertion as the method createHostMachineElement iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 21 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Ul Controllers Utility Class Object Converter Converters Converters Utility Ul Controllers dataCenter jsf DataCenterController XmIRdfCreator documentXmiRdf Document iDataCenterToXmIRdf HostMachineToXmIRdf nameE ntity T oXmIR df XmlUtility visualizeXmlIDataCenter jsf Navigator user Guest 1 click Create XML 2 createDataCenterXML 3 controllnputConsistency Jd createDataCenter nameEntity ra HostMachine ExternalStorage 5 create nameEntity Firewall pE Router 6 createDataCenterXmIR df dataCenter 1 1 1 1 1 1 1 1 1 1 1 D 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 7 create T 8 createRdfElement 9 appendChild rdfElement 10 createDataCenterElement nameSpace dataCenter 11 dataCenterElement 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D 1 1 1 1 1 1 1 1 1 1 1 D 1 1 1 1 1 1 nameEntity Exte
84. na end pul es Pagina 3 di 69 D3 27 3 Cloud Simulator design user manual and test ia 7 3 2 Create Virtual Machine 50 7 3 3 ICAO DD HCAUIOM MER A 54 5 s EI igo pcm m 55 7 3 3 2 SLAgreement SLObjective SLAction e 5 6 56 rcc MEG us en 58 7 3 4 Bre io iu Ieee eer 59 7 3 4 1 Exception in XML file generation ri 59 7 3 4 2 Exception in XML file insertion to KB 59 7 4 Create ServiceMetrics aces 60 7 4 1 TAS I E E 61 2 5 Simulate DataCenter E EE EEE 61 7 5 Misc NIIS Uie RTT P 62 7 5 2 FASE SI ACA ENO ee 63 7 6 Aman ze ARTS a a eee eee 67 MEE uu NE 68 Figure Index Figure 1 Domain model under Icaro Cloud Simulator i 8 Figure 2 Ontology under Knowledge Base 9 Figure 5 Viewer class arc hileclUTE is ccsenncsnccsscnenatnsthavedansvsssisnende ronzio rinite 11 Figure 4 Class DataCenerViewer and its methods 11 Controller class arc HOTEL ici noto 13 Figure 6 Two examples of controller classes
85. ned In this form it is possible to insert the IP address and the port at which is possible to find the API REST exposed from the KB to perform the insertion of a dataCenter iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 46 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test lt If the sending to KB of the DataCenter XML file succeeds the panel in Figure 34 is shown Done Response Code 200 Reason OK message SM 00001 53db68f255eaa DTCO012 Figure 34 Message of successful sending to KB of a new DataCenter If the sending to KB of the DataCenter XML file fails for any reason the panel in is shown Exception org apache http conn HttpHostConnectException Connect to 192 168 0 28 8080 192 168 0 28 failed Connection timed out connect Figure 35 Message of unsuccessful sending to KB of a new DataCenter The Back link redirect to creation web page of a DataCenter where are shown the data previously inserted that can be modified Once those changes are made a new XML file is generated and the web page in Figure 32 is newly reloaded The Create a BusinessConfiguration link serves to create an entity BusinessConfiguration on the DataCenter that has just generate To know how to create a BusinessConfiguration with the web application it is possible to see the chapter 8 3 7 2 3 1 Exception in XML
86. ng at Home to choose another operation to execute with the web application Create a Data Center Clear Back Add Create XML Host Machine External Storage ate XML button you must Firewall Machine to DataCenter Houter urn cloudicaro DataCenter TEST 012 hasName Data Center Test 012 hasldentifier DTC012 Figure 23 Entity that is possible to add in a dataCenter From this point is shown how is possible to add entities to DataCenter starting from HostMachine entity that it is mandatory to the creation of XML file 7 2 1 Host Machine To speed insertion of information the form of the creation of HostMachine entities Figure 24 allows inserting groups of hostMachine instead to insert of each single HostMachine Unlike inserted information about the dataCenter in this case is not necessary the insertion of the HostMachine URI being a multiple insertion the URI is generated automatically and it is based on the data center where are situated the host machines the number of the group which is created and iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 38 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test the number of host machines present in the group For example if a group of HostMachine is generated with information inserted on the form in Figure 24 in a DataCenter generated with information insert
87. nuL ist 24 fetchDataCenterByUriipOIKB uriDataCente G getURIDatac ercerLiscEyKB ipOfKB loop oreach unDataCenter 7 gatDataCenterByUr pOfKB unDataCar tgr Fa B executeQuery oOfKB select 9 queryKB pOfKB query j 10 receiveSuingirestAPIURI user pass typeOtContent charset I One repeat of sequence 7 17 25 same as 7 15 rasponsaMessageString 14 rasponseMessageSting 16 createDataCenter result uriDataC enter 17 dataCenter 12 execute htpGet i 13 htipResponse yi LL e ii KB uriDataCenter Ore repeat of sequence 7 17 t 26 gelURiHosiMachineListByDataCenter ipOXB urOsLaCente m 27 uriHosUv achneL st loop foreach uridostivachina 28 lelcbHestMachinsEyURl oOIK8 uiHoastMachine H 28 getFostMachineByUR IpOQKB unHostMachine One repeat of sequence 7 17 for Monitorinio 30 same as 7 One repeat ot 2 sequence 7 17 for gt NetworkAdapter 32 same as 7 30 getMonitorintoListByEntity ipO lt B urHcstiMachina 32 getNeworkAdapterLisiByEntinyipOnB uriHostachine 36 getURiVirtuatMachineListByHostMachine ipO KB uridostWacbing loop foreach urlVirvalMachine 38 fetch VirtuaMachineR One repeat of sequence 28 40 lor Virtus Machine 33 MrtualMacnine 40 nostMachine 38 sama as 28 41 dataCenter P s retresh i 44 click Next
88. olumes eclap bp64net eclap eu runningQ192 168 0 132 SNMP WIN CPU AVG 120 100 80 g e 60 40 20 0 0 12 13 14 15 16 17 18 12 13 14 15 16 17 18 S 56 6690 kMB Last 56 6970 kMB Max 56 5344 kMB Average E CPU Avg 945 0278 m Last 12484 6429 m Max 1624 9318 m Average O Warning 82540 O warning 70 B Critical 92857 B Critical 80 Default Template Default Template Command check snmp storage Command check snmp load pl bps lt 14 15 16 17 18 El In 4 4967 Mbps Last 15 0271 Mbps Max 4 5977 Mbps Average O Warning 800000000 W Critical 900000000 18 Physical Memo 2 0278 kMB Last 2 9706 kMB Max 2 1923 kMB Average O Warning 3998 Intel R PRO 1000 MT Network Connection 2 In E Critical 4498 check snmp int Command check snmp int pl Default Template Command check snmp storage Figure 62 Charts of the real data collected at the same time from all resources of a one machine Then the user must insert the start data of the simulation the number of days that must be simulated and it must click the button Simulate The metrics will be created instantly and then they are sent to Nagios server the web page shows to the user two panel with respectively the progress and the log of simulation Figure 63 Progress of simulation Log of simulation gt Simulate virtualMachine VirtMach0120141118T160123 gt Sending to nagiosService file of virtualMachine VirtMach0120141118T160123
89. on persistent e R4 Business configurations should be created over an existing data center contained in KB that is the system should allow a choice of one data center contained in the KB over which to generate a business configuration e R5 The system should allow analysis of metrics which are contained in KB and are associated with host and virtual machines e R6 The system should allow the collection of data related to real working Host Machines From these data should be extracted patterns to obtain models of workload for using them during simulation e R7 The system should provide two types of simulation o A fast simulation in which is possible to select entities host and virtual machine that are to be simulated and to which should be possible associate one of the models generated at point R6 o Simulated data must be written in an RRD file and must be sent to NAGIOS server so that another tool can calculate on simulated data as well as real data the High Level Metrics to save in KB o A real time simulation in which is possible to generate new patterns from those calculated at point R6 The user should be capable to modify and to add entities to simulated data center for example with the addition of new virtual machines These changes are necessary for analyzing workload generated on the real data center from such modifications 2 Cloud Simulator Domain Model The domain model used by this cloud simulator is based on the
90. onitorInfoDAO or NetworkAdapterDAO it is due in the same way to the structure of ontology in fact the entities MonitorInfo and NetworkAdapter have not a visible URI and cannot be considered as stand alone entities rather these entities can be retrieved only knowing the parent entity that contains them In these classes there are not the methods using the URI as parameter When a query response is returned it is in XML SPARQL form and it is necessary a converter utility to perform conversion from XML to object In the system the converter utility is contained in the class whose name start with the prefix Xm Sparg To and the rest indicates the entity converted by the class iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 15 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 Em SUE il fa 1 he read gem ei D3 27 3 Cloud Simulator design user manual and test en 3 4 Simulator The web application allows simulating the behavior of a dataCenter in two ways a fast simulation and a real time simulation At the moment the difference between the simulations is not merely on the time of the simulation but also on how the values are generated In fact in the real time simulation the values are randomly generated at the level of IcaroService and they are added to make the workload of the virtualMachine where the IcaroServices run In the fast simulation ina different way t
91. ontology under the KB For this reason many entities are similar if not equal to those contained on KB except for few entities that have been created to simplify development of the simulator In detail the classes that begin with word Group are used to take the data inserted by a user on the forms and with these to create a determinate number indicated by a user on the forms of an object whose name is indicated by the rest of the name of the creator class eliminating the word Group i e GroupHostMachine is the class responsible to create object of class HostMachine While the ontology is represented Figure 2 in hierarchical schema the domain model Figure 1 highlights the associations from the classes A very important association to note is one that associates the VirtualMachine class to IcaroService class with this association is possible to connect the part of the ontology domain model describing business configuration to part describing data center This association allows connection from perspective of the virtual things to perspective of the physical things iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 7 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test Java Class localNetworkList ipa localNetworkList 0 Java Class Java Class Java Class Java Class GroupHostMachine GroupRouter
92. page is generated using the composite component templates that are possible to define in a simple XHTML file In Icaro Cloud Simulator is saved one composite component for each level of panels that it should be possible to create in a determined web page For example on the web page of creation of data center there are two levels of panel the first level is represented by panels associated with entities that start with prefix Group and the second level is represented by panels associated with entities MonitorInfo and LocalNetwork So in ICS there is a folder called datacenter containing two composite components called respectively firstPanel xhtml and secondPanel xhtml In a composite component is possible to define the structure of the component and the attributes that should be used to add it to a web page The class CCUtility associated to all viewer classes search in the repository classes the methods that can fill attributes of composite component see section 5 1 This architecture is designed to make the composite component as flexible as possible in each composite component is possible to add a no predetermined number of input text of each type input text for IP input text for email etc simply defines methods in the repository class that return list of input text and then to associate this list to relative attribute in the composite component Not all attributes are mandatory so if an entity does not require a type of input text jus
93. r HostMachine rdf about urn cloudicaro HostMachine TEST 012_HM01 gt lt icr hasName gt hostTest01 lt icr hasName gt lt icr hasidentifier gt HSTT01 lt icr hasidentifier gt lt icr hasCPUCount rdf datatype amp xsd positivelnteger gt 32 lt icr hasCPUCount gt lt icr hasCPUSpeed rdf datatype 8 amp xsd decimal gt 2500 lt icr hasCPUSpeed gt lt icr nasCPUType gt Intel Xeon lt icr hasCPUType gt lt icr hasMemorySize rdf datatype amp xsd decimal gt 128 lt icrhasMemorySize gt icr hasl ocalStoraae Figure 32 Page of creation of XML file relative to a dataCenter entity In this web page is visible a text area that contains the generated XML file this text is not modifiable but it is selectable to be copied in any other application as a text editor Clicking on the button Download XML the XML file is automatically sent to the browser that the user are using to access the web application and it is possible to open it directly or download it on the own computer The downloaded file is a simple text file with xml extension and it has a filename datacenterYYYY MM DDTHH MM SS showing what is the entity contained in the XML in this case a DataCenter and the timestamp of when the file is sent to the browser Send DataCenter To KB http 192 168 0 106 8080 IcaroKB api dataCenter Figure 33 Form for the sending of a new dataCenter to KB Clicking on the button SendToKB the form in Figure 33 is ope
94. r l accelerazione del business delle PMI toscane Pagina 50 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test The VirtualMachines can be inserted through the form in Figure 41 which has many fields equal to those present in the creation from of a HostMachine group but there are some different The information contained in the fields are described here e externallPAddress IP Address that is shown by VirtualMachine towards the outside of the local network and which can be used to access it e monitoringlPAddress IP Address belonging to VirtualMachine on which monitoring is performed e prefixName prefix name of all VirtualMachine that will be created by this form At the prefix as do for the URI will be added a final number indicating the VirtualMachine in the group e prefixldentifier prefix identifier of all VirtualMachine that will be created by this form At the prefix as do for the URI will be added a final number indicating the VirtualMachine in the group e domain domain within which are situated the VirtualMachines At the moment when this document is written the KB accepts as value for domain DCO1 Figure 41 e username the username to access at the VirtualMachine It will be inserted identical for all the VirtualMachine in the group e password the password to access at the VirtualMachine It will be inserted identical for all the VirtualMachine
95. rma cloud per l accelerazione del business delle PMI toscane Pagina 36 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test 7 User guide In this chapter is described how to use Icaro Cloud Simulator 7 1 Home When a user access to the web application that realize Icaro Cloud Simulator he can see a blank page with a navigation bar where he can choose what operation he wants to perform between those present Figure 21 Create a DataCenter Create a BusinessConfiguration Create ServiceMetrics Simulate DataCenter Analyze Metrics Collect Data Figure 21 Operations that is possible to execute with the Icaro Cloud Simulator 7 2 Create a DataCenter Create a Data Center Clear Back Add gt Create XML To activate the create XML button you must Add at least one hostMachine to DataCenter um cloudicaro DataCenter TEST 012 hasName Data Center Test 012 hasldentifier DTC012 Figure 22 Principal page of the dataCenter creation The principal part of each cloud platform is the data center and it is necessary to have a tool that allows insertion in the KB of a new DataCenter which is possible to analyze This operation can be performed using the link Create a DataCenter present on the start navigation bar Once click on the operation link the user accesses to the web page shown in Figure 22 With the form of Figure 22 is possible to insert the fo
96. rnalStorage Firewall Router LocalNetwork 20 validateXML schemaXsd 22 createdXmlR df 21 No throw exception etCreatedXmIRdfDataCenter Ja setOkXmlRdf true 25 visualizeXmIDataCenter 26 redirect 27 goToVisualizeXMLDataCente Figure 12 Sequence diagram that show how the XML file of a DataCenter is create iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 22 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test In the Figure 13 there is one example of the methods that create XML Element In this case the code is cleaned from the code that is not necessary to explain what operations are performed by these methods As mentioned there is a part in the method where is appended the information that can be represented as a string such as the name and the identifier of the considered entity and there is a part where are appended other entities calling the method associated to them in this case the Monitorlnfo entity The order of insertion of the information is performed as indicated in the XML Schema so it is possible have elements of different type alternated between them public static Element createFirewallElement final Namespace nameSpace final Document documentParent final Firewall firewall Element firewallElement documentParent createElementNS nameSpace getURI nameSpace getPrefix
97. rted the minimum information to enable the button without this basic information the XML file does not pass the control against the XML Schema When the button is pressed the system calls the createDataCenterXML method in the DataCenterController class which in turn check with the method controlInputConsistency if there is a possible inconsistency between a SharedStorage URI inserted in the form of a HostMachine group and the relative entity SharedStorage that must be inserted in the form of an ExternalStorage group If there is an inconsistency then a message is shown to the user to inform him of the error else the method createDataCenterXML continues with the other operations The next operation is performed by the method createDataCenter which with the information contained in the form filled by the user creates the objects relative to the entities indicated in the form if in the form the user has decided to have 1000 HostMachines then in this method 1000 objects of the class HostMachine are created and they are associated to the correct DataCenter object which is also created from this method These objects which are created by the last operation are reachable from the DataCenter object containing all of them and for this reason this last object is passed to the createDataCenterXmlRdf method that is responsible to create the XML RDF file this method is in the utility class called XmlRdfCreator The method createDataCenterXmIRdf a
98. s first step creates the object documentXmlRdf to which will be appended elements created later the element RDF is added at the beginning because it contains the root tag lt rdf RDF gt and the namespace which will be used by the following elements After the rdfElement are added the elements relative to the objects contained in the DataCenter object The creation of the element DataCenter is different to the other elements the method createDataCenterElement of the DataCenterToXmlRdf class inserts in the element only the information that can be represented as a string in this case the name the identifier and the URI The other information that requires more than one row in the DataCenter element as the information about the HostMachine the ExternalStorage the Firewall and so on is inserted with calls to create nameEntity Element methods contained in the nameEntity ToXmlRdf class where nameEntity can be ExternalStorage Firewall Router LocalNetwork and HostMachine In each of these methods is created an element with the information that can be represented as a string and the information relative to other sub entities contained in the considered entity for example in the method createHostMachineElement of the class HostMachineToXmlRdf are inserted in the HostMachine tag the information that can be represented as a string CPU Memory username etc and the information about entities as MonitorInfo and NetworkAdapter To perform the insertio
99. s of a one MAMI air i 66 Figure 63 Page of fast simulation where it 1s possible to see the log of simulated entity 66 Figure 64 Web page that allow to analyze the metrics in the SM 67 iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 5 di 69 CUP 6408 30122011 026000074 ICARO_Template_Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test Legenda Acronimi e sigle Acronimo Dettaglio Sigla Supervisor amp Monitor iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 6 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test 1 Cloud Simulator Requirements e R1 The system should allow simple and fast generation of all entities connected to a data center or a business configuration It should be possible therefore the insertion of information related to these entities and with these data the generation of an XML file described syntactically by the schema provided by KB e R2 The system should allow simple and fast generation of entities related to ServiceMetric to consent study of other tools that analyze the KB e R3 Forall entities generated as XML the system should allow saving files in local in the device that is used to access the system Furthermore it should be possible sending the XML file to KB in order to make informati
100. see in Figure 58 and the green button Collect Data that if clicked by the user redirect him to the page where it is possible to start the collection of real data Simulate Data Center TEST 022 Faster Attention Pattern files not found Please collect data Figure 58 Alert message shows when there are not real data collected for fast simulation nagios nagios 192 168 0 103 22 usr local pnp4nagios var perfdata Collect Data Simulate Once the user presses the button StartCollect the system starts to retrieve the real data from the Nagios server through the RestAPI offers by the Supervisor amp Monitor tool The real data are collected with periods of one day seven days and 30 days until the user clicks the button StopCollect these operations continues to work also when the browser is closed Collect Data Username test Password 12345 IPAddress 192 168 0 109 201412157084442 Host eclap eu db running 192 168 0 13 Period 1day Metric S Metric S Metric S Metric S MP_W MP_W MP_W CPU_AVG Volumes Physical Memory Used Net Traffic StopCollect Get XML Ok Get XML Ok Get XML OK Get XML OK Get PNG O Get PNG O Get PNG O Get PNG O Figure 59 Web page where it is possible to see the real data collected and manage the collection operations CUP 6408 30122011 026000074 ICARO Template Delivera
101. shop on Systems and Virtualization Management Standard and the Cloud 11 CloudAnalyst A CloudSim based Visual Modeller for Analysing Cloud Computing Environments and Applications B Wickremasinghe R N Calheiros and R Buyya s l IEEE Computer Society 2010 24th International Conference on Advanced Information Networking and Applications AINA p 446 452 12 The Network Simulator Ns2 Online 2010 http nsnam isi edu nsnam index php Main Page iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 68 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test 13 Introduction of Cloud Computing and Survey of Simulation Software for Cloud M Aggarwal 13 2013 TIJ s Research Journal of Science amp IT Management Vol 2 2251 1563 14 CloudNetSim Simulation of Real Time Cloud Computing Applications T Cucinotta and Santogidis A Paris s n 2013 4th International Workshop on Analysis Tools and Methodologies for Embedded and Real time Systems WATERS 15 NetworkCloudSim Modelling Parallel Applications in Cloud Simulations S Kumar Garg and R Buyya Melbourne IEEE CS Press 2011 Proceedings of the 4th IEEE ACM International Conference on Utility and Cloud Computing 16 EMUSIM an integrated emulation and simulation environment for modeling evaluation and validation of performance of Cloud computing applications
102. st be inserted The applications present on the list are those that can be instanced in cloud Icaro platform As for the previous entities also in this case is not necessary to insert the URI of the caroApplication but this is not due to multiple entry The URI of an caroApplication is created with information about type of application BusinessConfiguration within which the application is inserted and the number of IcaroApplication contained in the BusinessConfiguration OO 1 IcaroApplication Icaro Service name IcaroApplicatt icaro Tenant identifier IAPP SLAgreement Creator capacity 89 typeOfApplication Joomla g Figure 45 Entities that is possible to add on an Icaro Application iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 54 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 ES PE ai a ul Wu ETE a D3 27 3 Cloud Simulator design user manual and test T If an IcaroApplication is inserted with information in Figure 45 and in Figure 43 the URI will be generated as urn cloudicaro Joomla Test 007 0 As it is possible to see in Figure 45 a user can add further entities to an caroApplication 7 3 3 1 Icaro Service Every caroApplication needs some services to work and if these services are not inserted then alert messages are generated by the system to inform the user of this problem see 8 3 4 2 In Figure
103. t does not create the method in the repository class Differences between Dynamic and Static repository class depend on when the lists of attributes are created static repository can create the lists at every time because they are predefined in the code and dynamic repository creates the lists after a precise operation and at run time This solution is necessary to make composite components dynamic If the panels must be fixed on the web page and if they are associated each to one entity the composite components can be inserted with a simple tag definition in the principal xhtml file 3 2 Controller Classes with Controller suffix are responsible to interact with classes belonging to the domain in a manner to create the objects associated with entities inserted from a user on the web pages obviously before is executed a check on the inserted information Once these objects are created it is possible to write an XML file to save information that is in the objects sending it directly to KB via RestAPI or downloading it on the computer Furthermore these classes must be able to retrieve information about entities that are requested by a user from the KB and they perform this operation using DAO classes present on the system These classes are important because the other classes that implement different functions must access them to catch the information about entities For example the viewer classes must access their respective controller to ta
104. tText containing the IP address and the port of the default KB if these data are incorrect the user can change them and then he can press the button OK When the button is pressed it calls the method nvertlPInserted that inverts the Boolean value in the class DataCenterController of a variable indicating if the IP address is inserted At the same time the web page tries to retrieve the list of the DataCenters contained in the indicated KB with a call to the method getDataCenterChoiceSelectOneMenu in the class DynamicAttributeRepository The web page will show information about the DataCenter as the name and the identifier of each DataCenter in the SelectOneMenu that it must create To retrieve this information in addition to the URI it is necessary that the method getDataCenterChoiceSelectOneMenu calls the method getDataCenterListByKB whose purpose is to retrieve the list of the DataCenters contained in the KB with information that does not involve other entities in this way is retrieved the necessary information without useless queries iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 24 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test O j T Controller Persistence Utllity aUtilty DataCenterController KBDAO RestAPI httpClient 1 click Send To KB 2 showSendForm 3 s
105. then the string that represent the XML document is inserted in a determined variable of the class DataCenterController associated to the TextArea where the user is redirected If an exception is generated then the user is also redirect to the same page but he will not see the TextArea but a message that informs him on the error occurs the variable that chooses from the two pages is the variable okXmlRdf in the DataCenterController 4 4 Send the DataCenter XML File to KB If the user has performed the operations described in the previous chapter he should be in the web page visualizeXMLDataCenter jsf where it is possible to send the generated DataCenter XML file to the KB so that a new DataCenter entity is created in the ontology It is possible to see the sequence diagram of this operation in the Figure 14 To perform this new operation the user must press the button SendToKB that as first step will show a new form where the user can insert information about the KB to which the XML file must be sent as IP address and port of the KB It is supposed that every KB in different machine has the same RestAPI name and this information is not modifiable The user confirms or changes the information iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 23 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test that there is in the form and
106. to the KB is created and it is executed calling the method queryKB on the RestAPI class o The query response is returned in XML SPARQL and the information contained is parsed to create a DataCenter object with the method createDataCenter in the class XmlSparglToDataCenter e Each retrieved DataCenter is inserted in a list and it is returned by the getDataCenterListByKB method The getDataCenterChoiceSelectOneMenu method uses the list of the DataCenter to create a menu where the user can choose one of the DataCenter contained in the KB once that he chooses the DataCenter he must press the button Load to retrieve the chosen DataCenter from the KB and view the entities contained in it public DataCenter getDataCenterByURI final String ipAddressOfKB final String uriDataCenter String select select hasName hasIdentifier where uriDataCenter gt rdf type icr DataCenter uriDataCenter gt icr hasName hasName uriDataCenter gt icr hasIdentifier hasIdentifier String result executeQuery ipAddressOfkB select return XmlSparglToDataCenter createDataCenter result uriDataCenter public DataCenter fetchDataCenterByURI final String ipAddressOfKB final String uriDataCenter DataCenter dataCenter getDataCenterByURI ipAddressOfKB uriDataCenter HostMachineDAO hostMachineDAO new HostMachineDAO for String uriHostMachine hostMachineDA0 getURIHostMachineListByDataCenter ipAddressOfKB uriD
107. tor is on or off on each caroServices It is possible to choose between these values Enabled indicates a working monitor and Disabled indicates a no working monitor e runsOnVM it indicates the VirtualMachine in which it is executed the caroService The choice is constrained to VirtualMachines inserted at the previous step It is possible to see in Figure 47 that a user can add further entities to an caroService entity In fact it is feasible a MonitorlInfo entity a TCPPort entity and an UDPPort entity To see information about monitorlnfo entity it is in 8 2 1 1 Monitor Info The other two entities contain simply a numeric field where the user can insert the TCPPort number and or UDPPort number to which the caroService replies END 2 IcaroService Monitor Info monitoriPAddress TCP Port name IcaroSeni UDP Port Figure 47 Entities that is possible to add on an Icaro Service 7 3 3 2 SLAgreement SLObjective SLAction e SLMetric As planned in the KB at each IcaroApplication can be associated a SLAgreement and this entity can be inserted through the form in Figure 48 The information that can be inserted in a SLAgreement entity is e startTime indicates when the SLAgremment begins to be valid e endTime indicates when the SLAgremment ends to be valid The SLAgreement is unequivocal for each caroApplication and only one can be created but it is possible to add to such entity an undefined number of SLObjective which
108. ure 18 Sequence diagram that shows how is performed the fast simulation iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 32 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 0 D3 27 3 Cloud Simulator design user manual and test To avoid this problem it is possible to use rrd4j library https code google com p rrd4j but there is the problem that the files written with this library must be read with the same library and Nagios does not use this library So in IcaroCloudSimulator is used the library java rrd that manages the RRD files with command line operations through rrdtool It is possible a workaround to read RRD files written in Windows by Nagios dumping the RRD files to XML sending these files to Nagios and dumping the XML back to RRD files in the server The main problem of this solution is the increased dimension of the XML file dumped respect to the original RRD file In the end the best solution is to run IcaroCloudSimulator in a Linux machine To send the RRD file and the description XML file each RRD file must have one XML associated that contains meta information about the RRD in the Nagios server IcaroCloudSimulator used the JSch library http www jcraft com jsch that allows SSH connection to another host and allows execution of command through this secure connection it is possible to copy the file created locally to the Nagios server with the scp command
109. uring that period and the final value which must be inserted in the last metric This operation can be useful if a user want to check correct detection of problems for example related to an overrun of the limits imposed by the SLA through the metrics included in KB Add ServiceMetric Create XML QU 1 ServiceMetric urientity Insert uri of the entity associated with metric name Insert name of the metric unit Insert the unit of metric serviceMetric Insert the number of service metric to generate min value Insert the minimum value assumed from the metric max value Insert the maximum value assumed from the metric final value Insert the final value assumed from the metric from Insert date and time in which the metric started or will start to Insert date and time in which the metric ended or will end Figure 52 Creation form of a ServiceMetric entitv iCaro La piattaforma cloud per l accelerazione del business delle PMI toscane Pagina 60 di 69 CUP 6408 30122011 026000074 ICARO Template Deliverable V1 O D3 27 3 Cloud Simulator design user manual and test For the creation of the metrics the form that must be filled is that of Figure 52 and the necessary information is as follows e uriEntity URI of the entity to which the metrics automatically generated are referred e name name of all metrics e unit unit of measure that must be associated to values inserted e serviceMetric the number of metrics that

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