drone-gc is a simple daemon that periodically removes unused docker resources. The garbage collector is optimized for continuous integration systems. It uses an lrfu algorithm to control the size of your image cache, while retaining the most frequently used images.

Installation:

docker run -d \
  --volume=/var/run/docker.sock:/var/run/docker.sock \
  --env=GC_DEBUG=true \
  --env=GC_CACHE=5gb \
  --env=GC_INTERVAL=5m \
  --restart=always \
  --name=gc drone/gc

Configuration:

GC_DEBUG

Enable debug mode

GC_DEBUG_PRETTY=false

Pretty print the logs

GC_DEBUG_COLOR=false

Pretty print the logs with color

GC_IGNORE_IMAGES

Comma-separated list of images to ignore. Supports globbing.

GC_IGNORE_CONTAINERS

Comma-separate list of container names to ignore. Support globbing.

GC_INTERVAL=5m

Interval at which the garbage collector is executed

GC_CACHE=5gb

Maximum image cache size

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