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https://issues.apache.org/jira/browse/HDFS-16940?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Vaughan updated HDFS-16940:
---------------------------------
    Description: 
Provide HTTP endpoints that report the current status of the API server when 
running in dynamic environments.  Using Kubernetes as an example, this would 
include `/livez` and `/readyz` endpoints.  These endpoints would be distinct, 
covering specific cases:
 * `livez` would indicate if the server is up and running.  A service can be up 
but not ready to to cover it's assigned duties.  As an example, a JournalNode 
could be up, but unformatted or unsynchronized.
 * `readyz` would indicate that the server ready.  Following the same example, 
once a JournalNode is synchronized it can act as part of the  JournalNode 
quorum, supporting other services.

  was:Provide HTTP endpoints that provide 


> Provide HTTP API health endpoints to simplify monitoring
> --------------------------------------------------------
>
>                 Key: HDFS-16940
>                 URL: https://issues.apache.org/jira/browse/HDFS-16940
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>    Affects Versions: 3.4.0, 3.3.9
>            Reporter: Steve Vaughan
>            Assignee: Steve Vaughan
>            Priority: Major
>
> Provide HTTP endpoints that report the current status of the API server when 
> running in dynamic environments.  Using Kubernetes as an example, this would 
> include `/livez` and `/readyz` endpoints.  These endpoints would be distinct, 
> covering specific cases:
>  * `livez` would indicate if the server is up and running.  A service can be 
> up but not ready to to cover it's assigned duties.  As an example, a 
> JournalNode could be up, but unformatted or unsynchronized.
>  * `readyz` would indicate that the server ready.  Following the same 
> example, once a JournalNode is synchronized it can act as part of the  
> JournalNode quorum, supporting other services.



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