mirror of
https://github.com/linuxkit/linuxkit.git
synced 2025-10-31 13:41:19 +00:00
89 lines
2.2 KiB
Bash
Executable File
89 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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set -e
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##
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#
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# script to remove all older linuxkit images
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# see usage() for usage and functionality
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#
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usage() {
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cat >&2 <<EOF
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$0 [-n] <base> <versions>
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Prune any images that start with <base> except the <versions> most recent versions.
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[-n] = dry-run, but report what it would remove and leave.
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Examples:
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$0 linuxkit 2
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will remove all versions of any image starting with linuxkit except for the 2 most recent of each
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would match "linuxkit/foo" and ALSO "linuxkitprojects/foo"
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$0 linuxkit/ 2
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will remove all versions of any image starting with linuxkit/ except for the 2 most recent of each
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would match "linuxkit/foo" but NOT "linuxkitprojects/foo"
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$0 linuxkit/sshd 3
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will remove all versions of linuxkit/sshd except for the 3 most recent
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EOF
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}
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# backwards compatibility
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dryrun=false
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if [ "$1" = "-n" ]; then
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dryrun=true
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set -- "$2" "$3"
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fi
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# sufficient arguments
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if [ $# -ne 2 ] ; then
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usage
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exit 1
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fi
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imagebase="$1"
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versions="$2"
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unversions=$(( $versions + 1))
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# make sure the imagebase is good
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case "$imagebase" in
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# has a slash in it
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*/*)
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testimage="$imagebase*"
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;;
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# no slash in it
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*)
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testimage="$imagebase*/*"
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;;
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esac
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# find all of our images
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IMAGELIST=$(docker image ls --filter=reference="$testimage"':*' --format '{{.Repository}} {{.Tag}} {{.CreatedAt}}')
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# find unique names for all images
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uniqueimages=$(echo "$IMAGELIST" | awk '{print $1}' | sort | uniq)
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# now go through each image, find the list
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for img in $uniqueimages; do
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# get the unique list of each, and sort by date
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sortedlist=$(echo "$IMAGELIST" | grep -w $img | sort -k 3,3 -r)
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# now split
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tokeep=$(echo "$sortedlist" | head -$versions | awk '{printf "%s:%s\t",$1,$2; $1=$2=""; print $0}')
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todelete=$(echo "$sortedlist" | tail -n +$unversions | awk '{print $1":"$2}')
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todeletedates=$(echo "$sortedlist" | tail -n +$unversions | awk '{printf "%s:%s\t",$1,$2; $1=$2=""; print $0}')
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echo "$tokeep" | while read i; do
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echo "KEEP\t$i"
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done
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if [ -n "$todeletedates" ]; then
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echo "$todeletedates" | while read i; do
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echo "DELETE\t$i"
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done
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if ! "$dryrun"; then
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docker image rm $todelete
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fi
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fi
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done
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