telefonica/zookeeper-prometheus repository overview

⁠zookeeper with prometheus exporter

The image is based on confluentinc/cp-zookeeper⁠, check its Docker Hub page⁠ for more information regarding the base.

This image includes the following extensions:

• Adds the following environment variables:

  • CMD_ZOOKEEPER_SERVER_ID: includes a command that will be executed at run time and whose output will be assigned to the variable ZOOKEEPER_SERVER_ID. This is useful when the identifier of the server is only known at run time.

      services:
        zookeeper:
          image: telefonica/zookeeper-prometheus
          environment:
            # Use part or an environment variable (the HOSTNAME in the example) to get the server id
            CMD_ZOOKEEPER_SERVER_ID: "echo $((${HOSTNAME##*-}+1))"
    

    Copy

  • CUSTOM_INIT_SCRIPT: includes a command that will be executed at run time, before Zookeeper starts.

• Adds the tool zk-ensemble-ready to wait until a Zookeeper ensemble is ready checking that all nodes are either leader or follower. Run zk-ensemble-ready -h for more information.
• Loads the Prometheus JMX exporter⁠ as a -javaagent. It exposes a /metrics HTTP endpoint on port 7071.

⁠build

$ docker build -t telefonica/zookeeper-prometheus:<tag> .

Tags must follow the convention x.y.z-N where x.y.z matches the Confluent base image tag and N is our build number.

⁠override the filter

Mount a config or replace the file in the following path:

/etc/zookeeper/zookeeper-jmx-exporter.yml