Amrit Sarkar commented on SOLR-13055:

SOLR-11126 has already introduced the above-stated checks as part of 
_HealthCheckHandler_ with endpoint *{{/admin/health}}*. 

This handler is not mentioned in the documentation and hence I missed it. I 
will comment on the Jira to add appropriate docs.

Closing this JIRA, we can open a new one for enhancements. 

> Introduce check to determine "liveliness" of a Solr node
> --------------------------------------------------------
>                 Key: SOLR-13055
>                 URL: https://issues.apache.org/jira/browse/SOLR-13055
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Amrit Sarkar
>            Priority: Minor
>              Labels: cloud, native
> As the applications are becoming cloud-friendly; there are multiple probes 
> which are required to verify availability of a node.
> 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.
> Solr should also support such probes out of the box as an API or otherwise to 
> make things easier. In this JIRA, we are tracking the necessary checks we 
> need to determine if a node is  'liveliness', in all modes, standalone and 
> cloud.

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