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Run cAdvisor when using Docker Compose

cAdvisor has long been a favorite monitoring tool of mine. I’m using Docker Compose for local testing and have begun including a cAdvisor in my docker-compose.yaml files.

cadvisor:
  restart: always
  image: google/cadvisor:${CADVISOR_VERSION}
  container_name: cadvisor
  # command:
  # - --prometheus_endpoint="/metrics" # Default
  volumes:
    - "/:/rootfs:ro"
    - "/var/run:/var/run:rw"
    - "/sys:/sys:ro"
    - "/var/snap/docker/current:/var/lib/docker:ro" #- "/var/lib/docker/:/var/lib/docker:ro"
  expose:
    - "8080"
  ports:
    - 8080:8080

I’d not realized until recently, that cAdvisor also surfaces a Prometheus metrics endpoint and so, if you do follow this path and you’re also using Prometheus, don’t forget to add cAdvisor to your Prometheus targets.

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