71 lines
2.2 KiB
Bash
Executable file
71 lines
2.2 KiB
Bash
Executable file
#!/usr/bin/env sh
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if [ -z "$DOCKER" ]; then
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DOCKER=docker
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fi
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echo_and_run() {
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echo "$@"
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"$@"
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return $?
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}
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backup() {
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volume="$1"
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target="$(realpath "$2")"
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target_dir="$(dirname "$target")"
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target_name="$(basename "$target")"
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test -z "$("$DOCKER" volume ls | grep "$volume")" && { echo "Error: No such volume, aborting" >&2; exit 1; }
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test -z "$target_dir" && { echo "Error: No base folder found for target=$target" >&2; exit 2; }
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test -z "$target_name" && { echo "Error: No target name found for target=$target" >&2; exit 3; }
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"$DOCKER" run --rm \
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--mount="type=volume,source=$volume,destination=/data,ro=true" \
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--mount="type=bind,source=$target_dir,destination=/data2" \
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busybox /bin/sh -c \
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"cd /data/ && tar cf '/data2/$target_name' ./* && chown $(id -u):$(id -g) /data2/$target_name"
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}
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restore() {
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target="$(realpath "$1")"
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target_dir="$(dirname "$target")"
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target_name="$(basename "$target")"
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volume="$2"
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test -z "$("$DOCKER" volume ls | grep "$volume")" && { echo "Error: No such volume, aborting" >&2; exit 1; }
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test -z "$target_dir" && { echo "Error: No base folder found for target=$target" >&2; exit 2; }
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test -z "$target_name" && { echo "Error: No target name found for target=$target" >&2; exit 3; }
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set -x
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"$DOCKER" run --rm \
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--mount="type=volume,source=$volume,destination=/data" \
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--mount="type=bind,source=$target_dir,destination=/data2" \
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busybox /bin/sh -c \
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"cd /data/ && rm -rf ./* && tar xf '/data2/$target_name'"
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set +x
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}
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backup_all() {
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"$DOCKER" volume ls \
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| awk '!/^[a-z]+ +[0-9a-f]+$/ && (NR>1) {print $2}' \
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| while read -r volume_name; do
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echo "$volume_name -> $volume_name.tar"
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backup "$volume_name" "$volume_name.tar"
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done
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}
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restore_all() {
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for tarball in "$@"; do
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volume_name="${tarball%.tar}"
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echo "$volume_name -> $volume"
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if ! "$DOCKER" volume inspect "$volume_name" 1>&2 2>/dev/null; then
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echo "Error: no such volume $volume_name" >&2
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exit 4
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fi
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restore "$tarball" "$volume_name"
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done
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}
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"$@"
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