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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDDS-1668) Add liveness probe to the example k8s resources files
Date Mon, 15 Jul 2019 21:13:00 GMT

    [ https://issues.apache.org/jira/browse/HDDS-1668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16885626#comment-16885626
] 

Anu Engineer commented on HDDS-1668:
------------------------------------

Cherry-picked to 0.4.1

 

> Add liveness probe to the example k8s resources files
> -----------------------------------------------------
>
>                 Key: HDDS-1668
>                 URL: https://issues.apache.org/jira/browse/HDDS-1668
>             Project: Hadoop Distributed Data Store
>          Issue Type: Sub-task
>            Reporter: Elek, Marton
>            Assignee: Elek, Marton
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.5.0, 0.4.1
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> In kubernetes resources we can define livebess probes which can help to detect any failure.
If the define port is not available the pod will be rescheduled.
> We need to add the liveness probes to our k8s resource files.
> Note: We shouldn't add readiness probes. Readiness probe is about the service availability.
The service/dns can be available only after the service is restarted. This is not good for
us as:
>  * We need DNS resolution during the startup (See OzoneManager.loadOMHAConfigs)
>  * We already implemented retry in case of missing DNS entries



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