whale-linter is a cross-platform Dockerfile linter.

• Python 3.2, 3.4, 3.5
• Debian wheezy, jessie, stretch

Note : You should use a specific tag (like jeromepin/whale-linter:0.0.7) instead of (implicit) latest

docker run -it --rm -v /path/to/Dockerfile:/Dockerfile jeromepin/whale-linter

pip install whale-linter

and to upgrade :

pip install --upgrade whale-linter

usage: whale-linter [-h] [-i RULE] [-v] DOCKERFILE
A simple non professional Dockerfile linter
positional arguments:
  DOCKERFILE            The Dockerfile to lint
optional arguments:
  -h, --help            Show this help message and exit
  -i, --ignore RULE     Rule to ignore
  -v, --version         Print version

Here is the list of all rules checked by whale-linter.

Do not hesitate to create a new issue if you have an idea for a new/incomplete rule.

Rules are ordered as follows :

• WL1xxx : Critical errors

• WL2xxx : Bad practices

• WL3xxx : Enhancements

Jerome Pin (@jerome_pin) <jerome@jeromepin.fr>

MIT. See LICENCE file.