[HBASE-14517] Show regionserver's version in master status page

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.2.0, 1.3.0, 2.0.0
• Component/s: monitoring
• Hadoop Flags: Reviewed

Release Note

Adds server version to the listing of regionservers on the master home page.

if a cluster where the versions deviate, at the bottom of the 'Version' column on the master home page listing of 'Region Servers', you will see a note in red that says something like: 'Total:10 9 nodes with inconsistent version'

• Assignee: Shaohui Liu
• Reporter: Shaohui Liu
• Created: 30/Sep/15 05:30
• Updated: 01/Jul/22 21:38
• Resolved: 09/Oct/15 22:15

Description

In production env, regionservers may be removed from the cluster for hardware problems and rejoined the cluster after the repair. There is a potential risk that the version of rejoined regionserver may diff from others because the cluster has been upgraded through many versions.

To solve this, we can show the all regionservers' version in the server list of master's status page, and highlight the regionserver when its version is different from the master's version, similar to HDFS-3245

Suggestions are welcome~