Docker Janitor

Simple docker cleaner for images, volumes, networks and containers. Written as a maintenance utility that relays inside as a container or a standalone binary.

You can specify time interval to cleanup, time delay in which container is safe after creation and give a filter list to exclude specific image names or tags from being deleted.

Usage

Binary, package

• You can download the latest release and run binary as is:

  docker-janitor -interval 1h -freshness 30m -clear-images

• TODO Add package instructions after goreleaser integrations

Docker

Or use docker image. To run it ad-hoc (once and exit):

docker run \
  --name=docker-janitor
  -e ONCE=true \
  -e CLEAR_IMAGES=true \
  -e EXCLUDE_TAGS=latest,stable,5.22 \
  -e FRESHNESS=30m \
  -v /var/run/docker.sock:/var/run/docker.sock -d houstonheat/docker-janitor:latest

To run the latest version in a standalone host you can use docker-compose example file:

docker-compose -f deploy/janitor-compose.yml up -d

Command line flags

Name	Environment Variable Name	Description
-once	ONCE	Execute cleaning just once
-debug	DEBUG	Set log level to debug
-dry-run	DRY_RUN	Do not change anything
-clear-containers	CLEAR_CONTAINERS	Clear unused containers, same as docker container prune
-clear-networks	CLEAR_NETWORKS	Clear unused networks, same as docker network prune
-clear-volumes	CLEAR_VOLUMES	Clear unused volumes, same as docker volume prune
-clear-images	CLEAR_IMAGES	Clear unused images, same as docker image prune -a without any filters
-exclude-fullnames	EXCLUDE_FULLNAMES	Comma separated list of images fullnames (repo[:port]/path:tag) to exclude from cleaning (e.g. -exclude-names registry.domain:9000/path/name:v1.0.0). This option only makes sense when -clear-images flag is set
-exclude-names	EXCLUDE_NAMES	Comma separated list of images names (repo[:port]/path) to exclude from cleaning (e.g. -exclude-names registry.domain/path/name,path/name/,ubuntu,myimage). This option only makes sense when -clear-images flag is set
-exclude-tags	EXCLUDE_TAGS	Comma separated list of images tags to exclude from cleaning (e.g. -exclude-tags latest,stable,5.22). This option only makes sense when -clear-images flag is set
-freshness	FRESHNESS	Freshness will keep images that were created in the given time period (default 1h)
-interval	INTERVAL	Interval to check on unused elements (default 12h). This option only makes sense when the -once flag is not set.

Development

Project

• TODO add development instructions

Testing

# The most common case: run all tests
go test -v ./...

Contributing

Easiest way to contribute is to provide feedback! Create an issue or ping houston_heat_ on Twitter. Any contributions you make are greatly appreciated:

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'houstonheat/docker-janitor#issue_number | Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

License

Distributed under the MIT License. See LICENSE for more information.

Contact

@houston_heat_ - [email protected]

Project Link: https://github.com/houstonheat/docker-janitor

TODO

• Add unit tests for:
  • boolean flags
  • docker package