[jira] [Assigned] (AURORA-894) Server updater should watch healthy instances

["Stephan Erb (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AURORA-894?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Erb reassigned AURORA-894:
----------------------------------

    Assignee: Stephan Erb  (was: Maxim Khutornenko)

> Server updater should watch healthy instances
> ---------------------------------------------
>
>                 Key: AURORA-894
>                 URL: https://issues.apache.org/jira/browse/AURORA-894
>             Project: Aurora
>          Issue Type: Epic
>          Components: Scheduler
>            Reporter: Maxim Khutornenko
>            Assignee: Stephan Erb
>              Labels: 2015-Q2
>
> Instead of starting the {{minWaitInInstanceRunningMs}} (aka {{watch_secs}}) countdown when an instance reaches RUNNING state, the updater should rely on the first successful health check instead. This will potentially speed up updates as the {{minWaitInInstanceRunningMs}} will no longer have to be chosen based on the worst observed instance startup/warmup delay but rather as a desired health check duration according to the following formula:
> {noformat}
> minWaitInInstanceRunningMs = interval_secs x num_desired_healthchecks x 1000
> {noformat}
> where:
>   {{interval_secs}} - https://github.com/apache/incubator-aurora/blob/master/docs/configuration-reference.md#healthcheckconfig-objects
>   {{num_desired_healthchecks}} - the desired number of OK health checks to observe before declaring an instance updated successfully
>   
> The above would allow every instance to start watching interval depending on the individual instance performance and potentially exit updater earlier. This feature requires AURORA-279.



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