Last active
September 27, 2024 02:02
-
-
Save wdullaer/76b450a0c986e576e98b to your computer and use it in GitHub Desktop.
Cleanup unused Docker images and containers
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
# Cleanup docker files: untagged containers and images. | |
# | |
# Use `docker-cleanup -n` for a dry run to see what would be deleted. | |
untagged_containers() { | |
# Print containers using untagged images: $1 is used with awk's print: 0=line, 1=column 1. | |
# NOTE: "[0-9a-f]{12}" does not work with GNU Awk 3.1.7 (RHEL6). | |
# Ref: https://github.com/blueyed/dotfiles/commit/a14f0b4b#commitcomment-6736470 | |
docker ps -a | tail -n +2 | awk '$2 ~ "^[0-9a-f]+$" {print $'$1'}' | |
} | |
untagged_images() { | |
# Print untagged images: $1 is used with awk's print: 0=line, 3=column 3. | |
# NOTE: intermediate images (via -a) seem to only cause | |
# "Error: Conflict, foobarid wasn't deleted" messages. | |
# Might be useful sometimes when Docker messed things up?! | |
# docker images -a | awk '$1 == "<none>" {print $'$1'}' | |
docker images | tail -n +2 | awk '$1 == "<none>" {print $'$1'}' | |
} | |
# Dry-run. | |
if [ "$1" = "-n" ]; then | |
echo "=== Containers with uncommitted images: ===" | |
untagged_containers 0 | |
echo | |
echo "=== Uncommitted images: ===" | |
untagged_images 0 | |
echo | |
echo "=== Dangling volumes: ===" | |
docker volume ls --filter dangling=true -q | |
exit | |
fi | |
if [ -n "$1" ]; then | |
echo "Cleanup docker files: remove untagged containers and images." | |
echo "Usage: ${0##*/} [-n]" | |
echo " -n: dry run: display what would get removed." | |
exit 1 | |
fi | |
# Remove containers with untagged images. | |
echo "Removing containers:" >&2 | |
untagged_containers 1 | xargs --no-run-if-empty docker rm --volumes=true | |
# Remove untagged images | |
echo "Removing images:" >&2 | |
untagged_images 3 | xargs --no-run-if-empty docker rmi | |
# Remove dangling volumes | |
echo "Removing volumes:" >&2 | |
docker volume prune -f | sed '/Total reclaimed space/d' |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
docker images -q | xargs docker rmi