[
https://issues.apache.org/jira/browse/SOLR-14210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17023298#comment-17023298
]
Jan Høydahl commented on SOLR-14210:
------------------------------------
I created SOLR-14216 for turning off authentication for healt check.
> Introduce Node-level status handler for replicas
> ------------------------------------------------
>
> Key: SOLR-14210
> URL: https://issues.apache.org/jira/browse/SOLR-14210
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: master (9.0), 8.5
> Reporter: Houston Putman
> Priority: Major
>
> h2. Background
> As was brought up in SOLR-13055, in order to run Solr in a more cloud-native
> way, we need some additional features around node-level healthchecks.
> {quote}Like in Kubernetes we need 'liveliness' and 'readiness' probe
> explained in
> [https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/n]
> determine if a node is live and ready to serve live traffic.
> {quote}
>
> However there are issues around kubernetes managing it's own rolling
> restarts. With the current healthcheck setup, it's easy to envision a
> scenario in which Solr reports itself as "healthy" when all of its replicas
> are actually recovering. Therefore kubernetes, seeing a healthy pod would
> then go and restart the next Solr node. This can happen until all replicas
> are "recovering" and none are healthy. (maybe the last one restarted will be
> "down", but still there are no "active" replicas)
> h2. Proposal
> I propose we make an additional healthcheck handler that returns whether all
> replicas hosted by that Solr node are healthy and "active". That way we will
> be able to use the [default kubernetes rolling restart
> logic|https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#update-strategies]
> with Solr.
> To add on to [Jan's point
> here|https://issues.apache.org/jira/browse/SOLR-13055?focusedCommentId=16716559&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16716559],
> this handler should be more friendly for other Content-Types and should use
> bettter HTTP response statuses.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org
For additional commands, e-mail: issues-h...@lucene.apache.org
