[jira] [Created] (HBASE-30473) Expose Master switch states as numeric metrics

["Junegunn Choi (Jira)" <ji...@apache.org>]

Junegunn Choi created HBASE-30473:
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             Summary: Expose Master switch states as numeric metrics
                 Key: HBASE-30473
                 URL: https://issues.apache.org/jira/browse/HBASE-30473
             Project: HBase
          Issue Type: Improvement
          Components: master, metrics
            Reporter: Junegunn Choi
            Assignee: Junegunn Choi


h2. Problem

Operators can disable cluster-wide services through HBase shell switches, but most switch states are not exported as metrics. For example, {{cleaner_chore_switch false}} disables HFile and WAL cleaning, and operators must run {{cleaner_chore_enabled}} to check that state. A monitoring system cannot directly detect that the cleaner was left disabled. The balancer exports {{tag.isBalancerActive}} as a string tag in a separate metrics source.

h2. Proposed Fix

Expose nine numeric gauges under {{Hadoop:service=HBase,name=Master,sub=Server}}:

- {{balancerEnabled}}
- {{normalizerEnabled}}
- {{splitEnabled}}
- {{mergeEnabled}}
- {{cleanerChoreEnabled}}
- {{catalogJanitorEnabled}}
- {{snapshotCleanupEnabled}}
- {{replicationPeerModificationEnabled}}
- {{rpcThrottleEnabled}}

Use {{1}} for enabled and {{0}} for disabled. {{rpcThrottleEnabled}} reports {{-1}} when quota support is enabled but the quota manager is not ready.




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