Docker JMX exporter for Prometheus

Essentially another dockerised JMX Exporter image, this uses alpine-java and dumb-init to provide a relatively small image (approx 130Mb) and includes a released version of jmx_exporter from the maven central repository

Available on Docker hub

Building docker image

docker build -t sscaling/jmx-prometheus-exporter .

Running

docker run --rm -p "5556:5556" sscaling/jmx-prometheus-exporter

Then you can visit the metrics endpoint: http://127.0.0.1:5556/metrics (assuming docker is running on localhost)

Configuration

By default, the jmx-exporter is configured to monitor it's own metrics (as per the main repo example). However, to provide your own configuration, mount the YAML file as a volume

docker run --rm -p "5556:5556" -v "$PWD/config.yml:/opt/jmx_exporter/config.yml" sscaling/jmx-prometheus-exporter

The configuration options are documented: https://github.com/prometheus/jmx_exporter

Environment variables

Additionally, the following environment variables can be defined

• SERVICE_PORT - what port to run the service (if you don't like 5556)
• JVM_OPTS - any additional options, Xmx etc.
• CONFIG_YML - override the location of config.yaml (default: /opt/jmx_exporter/config.yml which monitors jmx exporter's jvm)

Using with Prometheus

Minimal example config:

global:
 scrape_interval: 10s
 evaluation_interval: 10s
scrape_configs:
 - job_name: 'jmx'
   static_configs:
    - targets:
      - 127.0.0.1:5556