Maxim Khutornenko created AURORA-894:
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Summary: Server updater should watch healthy instances
Key: AURORA-894
URL: https://issues.apache.org/jira/browse/AURORA-894
Project: Aurora
Issue Type: Task
Components: Scheduler
Reporter: Maxim Khutornenko
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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