maoling opened a new pull request #1528:
URL: https://github.com/apache/zookeeper/pull/1528
- Apply this patch, we can export ZooKeeper version as prometheus metric.
For example:
```
leader_unavailable_time_sum 0.0
# HELP zk_version_info ZooKeeper version info
# TYPE zk_version_info gauge
zk_version_info{version="3.7.0-SNAPSHOT",revision_hash="b761b77a3bf8cd02edaad88a33bafbc8b6c65be4",built_on="2020-11-07
08:03 UTC",} 1.0
# HELP ensemble_auth_success ensemble_auth_success
```
- more details in the
[ZOOKEEPER-3982](https://issues.apache.org/jira/browse/ZOOKEEPER-3982)
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