Jay Brown
112 lines
3.1 KiB
Bash
Executable File
112 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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# cleanup.docker.images.sh
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#
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# Removes old Docker images, keeping only the newest image per repository.
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# Images are sorted by creation date, and only the most recent per repo is retained.
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#
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# Usage:
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# ./cleanup.docker.images.sh [--dryrun]
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#
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# Options:
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# --dryrun Show what would be deleted without actually deleting
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#
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# Returns:
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# 0 on success
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# 1 on error
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set -euo pipefail
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DRYRUN=false
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# Parse arguments
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for arg in "$@"; do
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case $arg in
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--dryrun)
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DRYRUN=true
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shift
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;;
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--help|-h)
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echo "Usage: $0 [--dryrun]"
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echo ""
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echo "Removes old Docker images, keeping only the newest per repository."
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echo ""
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echo "Options:"
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echo " --dryrun Show what would be deleted without actually deleting"
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echo " --help Show this help message"
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exit 0
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;;
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*)
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echo "Unknown option: $arg"
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echo "Use --help for usage information"
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exit 1
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;;
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esac
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done
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# Get images to delete: all but the newest per repository
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# Format: repository|tag|id|created
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# Sort by repo, then by date descending (newest first)
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# Skip the first (newest) for each repo, output the rest
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get_images_to_delete() {
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docker images --format '{{.Repository}}|{{.Tag}}|{{.ID}}|{{.CreatedAt}}' | \
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grep -v '<none>' | \
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sort -t'|' -k1,1 -k4r | \
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awk -F'|' 'seen[$1]++ {print $1"|"$2"|"$3}'
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}
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# Get unique image IDs from the list
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get_unique_ids() {
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awk -F'|' '{print $3}' | sort -u
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}
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echo "Scanning Docker images..."
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echo ""
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IMAGES_TO_DELETE=$(get_images_to_delete)
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if [ -z "$IMAGES_TO_DELETE" ]; then
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echo "No old images to clean up. Each repository has only one image."
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exit 0
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fi
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# Count images
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IMAGE_COUNT=$(echo "$IMAGES_TO_DELETE" | wc -l | tr -d ' ')
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UNIQUE_IDS=$(echo "$IMAGES_TO_DELETE" | get_unique_ids)
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UNIQUE_COUNT=$(echo "$UNIQUE_IDS" | wc -l | tr -d ' ')
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if [ "$DRYRUN" = true ]; then
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echo "=== DRY RUN MODE ==="
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echo "The following images would be deleted ($IMAGE_COUNT tags, $UNIQUE_COUNT unique images):"
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echo ""
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printf "%-50s %-35s %s\n" "REPOSITORY" "TAG" "IMAGE ID"
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printf "%-50s %-35s %s\n" "----------" "---" "--------"
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echo "$IMAGES_TO_DELETE" | while IFS='|' read -r repo tag id; do
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printf "%-50s %-35s %s\n" "$repo" "$tag" "$id"
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done
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echo ""
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echo "Run without --dryrun to delete these images."
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else
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echo "Deleting $IMAGE_COUNT image tags ($UNIQUE_COUNT unique images)..."
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echo ""
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DELETED=0
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FAILED=0
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for id in $UNIQUE_IDS; do
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if docker rmi "$id" 2>/dev/null; then
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((DELETED++)) || true
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else
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# Try force removal if normal removal fails
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if docker rmi -f "$id" 2>/dev/null; then
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((DELETED++)) || true
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else
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echo "Warning: Could not delete image $id (may be in use)"
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((FAILED++)) || true
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fi
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fi
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done
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echo ""
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echo "Cleanup complete: $DELETED deleted, $FAILED failed/skipped"
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fi
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