[jira] [Created] (HBASE-26296) Make it easier to orchestrate rolling upgrades

["Bryan Beaudreault (Jira)" <ji...@apache.org>]

Bryan Beaudreault created HBASE-26296:
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             Summary: Make it easier to orchestrate rolling upgrades
                 Key: HBASE-26296
                 URL: https://issues.apache.org/jira/browse/HBASE-26296
             Project: HBase
          Issue Type: Improvement
            Reporter: Bryan Beaudreault


In order to orchestrate rolling upgrades, we need a way to query VersionInfo on a per-server basis. Currently I can see version exposed in two ways:
 * One can hit the /dump endpoint, but this creates a ton of extra output and is not machine parseable.
 * One can call Admin.getClusterMetrics() with Option.HBASE_VERSION, but the resulting response only has a single getHBaseVersion() which only represents the version for the active HMaster

We could make it a lot easier to orchestrate rolling upgrades if we exposed the VersionInfo details for all servers in the cluster. At a minimum I think we could add it to the /jmx response, but it would also be very helpful to add it to Admin.



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