hangc0276 opened a new pull request #10803: URL: https://github.com/apache/pulsar/pull/10803
### Motivation After upgrade zookeeper version to 3.6.2 in #8590 and removed AspectJ based metrics for ZooKeeper in #10533, the zookeeper's prometheus metric has lost if we start zookeeper by `bin/puldar-daemon start zookeeper`. Due to zookeeper 3.6.0+ has add internal prometheus metric provider, so we can turn on by default in pulsar. ### Modification 1. turn on zookeeper prometheus metric provider by default in `conf/zookeeper.conf` and use 8000 as default port sync with old zookeeper metric port 2. add grafana panel for new zookeeper metrics 3. remove old prometheus metric provider in `ZooKeeperStarter` and `ConfigurationStoreStarter`. 4. update reference-metric.md doc -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
