Lahiru, IMO autoscaler needs to build up its own information model, on top of topology model. This is applicable for all Stratos components.
On Wed, Oct 23, 2013 at 11:57 AM, Lahiru Sandaruwan <[email protected]>wrote: > Hi Nirmal, > > Autoscaler needs the service id for finding cluster. Otherwise it has to > traverse through all services to find it. Please add service id to the > event. > > Thanks. > > > On Mon, Oct 21, 2013 at 1:50 PM, Nirmal Fernando > <[email protected]>wrote: > >> >> >> >> On Mon, Oct 21, 2013 at 1:25 PM, Lahiru Sandaruwan <[email protected]>wrote: >> >>> Hi Nirmal, >>> >>> Nice work! >>> >>> On Sun, Oct 20, 2013 at 11:46 PM, Nirmal Fernando < >>> [email protected]> wrote: >>> >>>> Hi All, >>>> >>>> I've successfully integrated Stratos LB and WSO2 CEP (selected CEP >>>> engine). >>>> >>>> Load balancer and CEP is communicating via Observer pattern, where a >>>> statistics collector in LB acting as the subject and CEPs act as Observers. >>>> Stats collector periodically notifies all the registered observers, so that >>>> they can act upon changes. I'm committing the changes soon. >>>> >>>> Now, when I load Stratos LB, CEP emits periodical aggregated statistics >>>> on requests in flight at LB level, to a topic. >>>> >>>> Following are few aggregated stats emitted by CEP: >>>> >>>> >>>> {"average_requests_in_flight":{"cluster_id":"c1","value":"78.66666666666667"}} >>>> >>>> {"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"0.17776829680194836"}} >>>> >>>> {"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.0666637038353851"}} >>>> >>> >>> Hope above three are separate events sent to the topic >>> "summarized_stat_topic". Autoscaler will get these and keep latest values >>> against cluster "c1". >>> >> >> Lahiru, yes correct. (summarized-health-stats topic) >> >>> >>> Thanks. >>> >>>> >>>> >>>> {"second_derivative_of_requests_in_flight":{"cluster_id":"c1","value":"-0.004444888953094816"}} >>>> >>>> {"gradient_of_requests_in_flight":{"cluster_id":"c1","value":"0.04444246922359006"}} >>>> {"average_requests_in_flight":{"cluster_id":"c1","value":"9.5"}} >>>> >>>> >>>> >>>> -- >>>> Best Regards, >>>> Nirmal >>>> >>>> Nirmal Fernando. >>>> PPMC Member & Committer of Apache Stratos, >>>> Senior Software Engineer, WSO2 Inc. >>>> >>>> Blog: http://nirmalfdo.blogspot.com/ >>>> >>> >>> >>> >>> -- >>> -- >>> Lahiru Sandaruwan >>> Software Engineer, >>> Platform Technologies, >>> WSO2 Inc., http://wso2.com >>> lean.enterprise.middleware >>> >>> email: [email protected] cell: (+94) 773 325 954 >>> blog: http://lahiruwrites.blogspot.com/ >>> twitter: http://twitter.com/lahirus >>> linked-in: http://lk.linkedin.com/pub/lahiru-sandaruwan/16/153/146 >>> >>> >> >> >> -- >> Best Regards, >> Nirmal >> >> Nirmal Fernando. >> PPMC Member & Committer of Apache Stratos, >> Senior Software Engineer, WSO2 Inc. >> >> Blog: http://nirmalfdo.blogspot.com/ >> > > > > -- > -- > Lahiru Sandaruwan > Software Engineer, > Platform Technologies, > WSO2 Inc., http://wso2.com > lean.enterprise.middleware > > email: [email protected] cell: (+94) 773 325 954 > blog: http://lahiruwrites.blogspot.com/ > twitter: http://twitter.com/lahirus > linked-in: http://lk.linkedin.com/pub/lahiru-sandaruwan/16/153/146 > > -- Best Regards, Nirmal Nirmal Fernando. PPMC Member & Committer of Apache Stratos, Senior Software Engineer, WSO2 Inc. Blog: http://nirmalfdo.blogspot.com/
