joshuaalewis/docker-janitor

This containers performs continuous cleanups on unused Docker resources on the host

docker-janitor

This containers performs continuous cleanups on unused Docker resources on the host.

Basically it performs docker system prune --all from time to time.

Usage

• To run it on a standalone host
  • docker run -v /var/run/docker.sock:/var/run/docker.sock getsoma/janitor
• To run on all hosts of a Swarm Cluster
  • docker-compose.yml

version: '3.5'

services:
  janitor:
    image: getsoma/janitor
    build: .
    deploy:
      mode: global
    environment:
      - SLEEP_TIME=86400
      - UNUSED_TIME=24h
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock```

docker stack deploy --compose-file docker-compose.yml janitor

ENV

• SLEEP_TIME: time in seconds between janitor script runs (default: 86400 - once a day)
• SKIP_RANDOM_BACKOFF: On the first run, the container will sleep randomly between 0 and SLEEP_TIME before entering the loop (random backoff) so that the hosts won't run this script at the same time, possibly causing unecessary global pressure on the cluster (default: false)
• UNUSED_TIME: min age of resource creation before being pruned (default: 24h).