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130 lines
3.6 KiB
130 lines
3.6 KiB
8 years ago
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#!/bin/bash -e
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function get-volumes() {
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local vols=""
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for vol in ${*}; do
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local vf=$(docker inspect -f '{{.HostConfig.VolumesFrom}}' ${vol} | sed -n 's,^\[\(.*\)\]$,\1,p')
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if test -n "$vf"; then
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vols+=" "$(get-volumes $vf)
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fi
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vols+=" "$(docker inspect -f '{{.Config.Volumes}}' ${vol} | sed -n 's,^map\[\(.*\)\]$,\1,p' | sed 's,:[^ ]*,,g')
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done
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echo ${vols} | tr '[ ]' '[\n]' | sort | uniq | tr '[\n]' '[ ]'
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}
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backup=""
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volumes=""
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infile=""
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tofile=""
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toserver=""
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tocontainer=""
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while test $# -gt 0; do
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case "$1" in
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(-h|--help)
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cat <<EOF
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$0 -b [OPTIONS]
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OPTIONS:
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-b, --backup <container> name of the docker container to backup
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-v, --volume <volume> add volume path to backup from container
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-a, --auto automatically detect volumes to backup from container
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-i, --in-file <file> take already existing backup file to import
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-s, --to-server <server> copy backup to docker instance on ssh server
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-c, --to-container <container> write backup into container on ssh server
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-o, --to-file <file> write backup to file
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DESCRIPTION:
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Take docker backups and copy them to a file or restore them into a
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docker instance on an ssh target server.
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Note: Use ssh key exchange to prevent password query.
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Note: Only volume paths are backed-up correctly
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EXAMPLE:
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$0 -b wordpress -a -o /tmp/wordpress.bak.tar.bz2
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$0 -i /tmp/wordpress.bak.tar.bz2 -c wordpress
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$0 -b backup-test -a -s server -c backup-test
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EOF
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exit 0
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;;
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(-b|--backup)
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shift
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backup="$1"
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;;
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(-i|--in-file)
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shift
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infile="$1"
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;;
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(-o|--to-file)
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shift
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tofile="$1"
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;;
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(-s|--to-server)
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shift
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toserver="$1"
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;;
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(-c|--to-container)
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shift
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tocontainer="$1"
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;;
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(-a|--auto)
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if test -z "$backup"; then
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echo "**** Error: --auto first requires --backup, try $0 --help" 1>&2
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exit 1
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fi
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volumes+=" "$(get-volumes $backup)
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;;
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(-v|--volume)
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shift
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volumes+=("$1")
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;;
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(*)
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echo "**** Error: unknown argument $1, try $0 --help" 1>&2
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exit 1
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;;
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esac
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if test $# -eq 0; then
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echo "**** Error: missing argument, try $0 --help" 1>&2
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exit 1
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fi
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shift
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done
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if test -n "$backup"; then
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if test -z "${volumes}"; then
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echo "**** Error: no volumes to backup, try $0 --help" 1>&2
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exit 1
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fi
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elif test -z "$infile"; then
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echo "**** Error: no input source specified, try $0 --help" 1>&2
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exit 1
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fi
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if test -n "$toserver"; then
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if test -z "$tocontainer"; then
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echo "**** Error: no target container specified, try $0 --help" 1>&2
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exit 1
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fi
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elif test -z "$tofile" -a -z "$tocontainer";then
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echo "**** Error: no target specified, try $0 --help" 1>&2
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exit 1
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fi
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(
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if test -n "$backup"; then
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docker run --rm -i -w / --volumes-from $backup ubuntu tar cjP ${volumes}
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elif test -n "$infile"; then
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cat "$infile"
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fi
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) | (
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if test -n "$toserver"; then
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ssh $toserver docker run --rm -i -w / --volumes-from $tocontainer ubuntu tar xjP
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elif test -n "$tocontainer"; then
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docker run --rm -i -w / --volumes-from $tocontainer ubuntu tar xjP
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elif test -n "$tofile";then
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cat > "$tofile"
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fi
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)
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