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https://issues.apache.org/jira/browse/HADOOP-15562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16523941#comment-16523941
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Íñigo Goiri commented on HADOOP-15562:
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This should support other services like:
* The Router: we should be available to check the state of the Router.
* The Observer Namenode: we should be able to redirect to both Active and
Standby.
> Add Software Load Balancing support for Hadoop services
> -------------------------------------------------------
>
> Key: HADOOP-15562
> URL: https://issues.apache.org/jira/browse/HADOOP-15562
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Giovanni Matteo Fumarola
> Priority: Minor
>
> We put HA services behind Software Load Balancers (SLBs), so the SLB only
> redirects to the Active components (e.g., active Namenode).
> SLBs usually rely on the return code of an endpoint to determine if a service
> is available to serve requests.
> Currently, one can use already existing interfaces like JMX to check the
> status of the service.
> However, there is a need to do the mapping between the JMX values and the
> state of the service.
> We should provide an interface (potentially REST) to check for particular JMX
> (or a new ones) values and report a particular HTTP code (e.g., 200).
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