Hi Shaheedur, Cartridge group used to specify what are the cartridges/groups need to be grouped together and the behavior among the children of that group. That's how we have grouped the cartridge/groups together. The behaviors of a group can be startupDependency, termiation Behaviour and scale dependents. When you decide that a bunch of cartridges can be grouped together based on their functionality, you can define a group and specify these behaviors. This behavior will be specified in a cartridge group w.r.t the children of that group. Please note that since we have recursive group support, you can define a cartridge group inside a cartridge group as well as i mentioned earlier.
Why we have defined separate cartridge group definition rather than directly defining cartridge group inline in the application is that the re-usability. If you define a cartridge group definition, then it can be used in multiple application. In that case, if you are to have a group in your application, you will have to define at-least one cartridge group definition by having these behaviors in recursive manner. Then you can use that cartridge group in your application and provide dynamic information such as alias, how many group instances and etc (these i believe dynamic information which can be differed from application to application). You can find sample carriage groups in https://github.com/apache/stratos/tree/master/samples/cartridges-groups Thanks, Reka On Tue, Mar 17, 2015 at 11:38 AM, Shaheedur Haque (shahhaqu) < [email protected]> wrote: > Reposting to main mailer… > > > > *From:* Shaheedur Haque (shahhaqu) > *Sent:* Tuesday, March 17, 2015 10:29 AM > *To:* [email protected] > *Subject:* What is a Cartridge Group in Stratos 4.1.0? > > > > Hi, > > > > I am trying to define the application shown below, but am getting this > exception: > > > > TID: [0] [STRATOS] [2015-03-17 10:09:21,282] ERROR > {org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver} - Cartridge > group not found: [group-name] blade-0x0 > > java.lang.RuntimeException: Cartridge group not found: [group-name] > blade-0x0 > > at > org.apache.stratos.autoscaler.applications.parser.DefaultApplicationParser.parseGroups(DefaultApplicationParser.java:563) > > at > org.apache.stratos.autoscaler.applications.parser.DefaultApplicationParser.buildCompositeAppStructure(DefaultApplicationParser.java:315) > > … > > > > I’d not heard of a cartridge group, so I Iooked in > https://docs.google.com/document/d/1AYLAAXySvh24JZw0NQixlKg4yX8jqD3Vtc_Pz-zmHaw, > only to see a (new?) reference to such an object, with no data. I > eventually found > https://cwiki.apache.org/confluence/display/STRATOS/4.1.0+Sample+Cartridge+Group+Definition. > However, ignoring the obvious errors/obsolete items, this seems completely > redundant w.r.t to the Application definition. So what is this object for? > How do I get rid of the error? > > > > Thanks, Shaheed > > > > P.S. This is the Application, note that “blade-0x0” is in the outermost > group, and the output is sorted by key: > > > > { > > "application_template_id": "system", > > "components": { > > "cartridges": [], > > "groups": [ > > { > > "alias": "blade-0x0", > > "cartridges": [ > > { > > "cartridgeMax": 10, > > "cartridgeMin": 1, > > "subscribableInfo": { > > "alias": "cartridge1-1x0", > > "artifactRepository": { > > "privateRepo": true, > > "repoPassword": "c-policy-2", > > "repoUrl": " > http://xxx:10080/git/default.git";, > > "repoUsername": "user" > > }, > > "autoscalingPolicy": "economyPolicy", > > "deploymentPolicy": "static-1" > > }, > > "type": "cartridge1" > > }, > > { > > "cartridgeMax": 10, > > "cartridgeMin": 1, > > "subscribableInfo": { > > "alias": "cartridge2-1x0", > > "artifactRepository": { > > "privateRepo": true, > > "repoPassword": "c-policy-2", > > "repoUrl": " > http://xxx:10080/git/default.git";, > > "repoUsername": "user" > > }, > > "autoscalingPolicy": "economyPolicy", > > "deploymentPolicy": "static-1" > > }, > > "type": "cartridge2" > > } > > ], > > "groups": [ > > { > > "alias": "slice-1x0", > > "cartridges": [ > > { > > "cartridgeMax": 10, > > "cartridgeMin": 1, > > "subscribableInfo": { > > "alias": "cartridge-proxy-2x0", > > "artifactRepository": { > > "privateRepo": true, > > "repoPassword": "c-policy-1a", > > "repoUrl": " > http://xxx:10080/git/default.git";, > > "repoUsername": "user" > > }, > > "autoscalingPolicy": "economyPolicy", > > "deploymentPolicy": "static-1" > > }, > > "type": "cartridge-proxy" > > }, > > { > > "cartridgeMax": 10, > > "cartridgeMin": 1, > > "subscribableInfo": { > > "alias": "cisco-sample-vm-2x0", > > "artifactRepository": { > > "privateRepo": true, > > "repoPassword": "c-policy-1b", > > "repoUrl": " > http://xxx:10080/git/default.git";, > > "repoUsername": "user" > > }, > > "autoscalingPolicy": "economyPolicy", > > "deploymentPolicy": "static-1" > > }, > > "type": "cisco-sample-vm" > > } > > ], > > "groups": [], > > "max": 1, > > "min": 1, > > "name": "slice-1x0" > > } > > ], > > "max": 2, > > "min": 1, > > "name": "blade-0x0" > > } > > ] > > } > > } > > > > > -- Reka Thirunavukkarasu Senior Software Engineer, WSO2, Inc.:http://wso2.com, Mobile: +94776442007
