91 lines
2.5 KiB
Bash
91 lines
2.5 KiB
Bash
#!/bin/bash
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##
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# Sync with remote server and create Btrfs snapshots
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#
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# This scripts uses rsync to sync remote directories with a local copy
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# After every successful sync a readonly Btrfs snapshot of this copy is
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# created
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#
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# This script requires root privileges for creating Btrfs snapshots.
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# Consider using public key authentification with SSH to allow root
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# logins on remote machines:
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#
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# On remote side:
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# echo "PermitRootLogin without-password" >> /etc/ssh/sshd_config:
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#
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# On local side:
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# sudo ssh-keygen
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# sudo cat /root/.ssh/id_dsa.pub | ssh user@remote 'cat >> /root/.ssh/authorized_keys'
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#
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# @copyright 2013 Steffen Vogel
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# @license http://www.gnu.org/licenses/gpl.txt GNU Public License
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# @author Steffen Vogel <info@steffenvogel.de>
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# @link http://www.steffenvogel.de
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##
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##
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# This script is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# any later version.
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#
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# This script is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this script. If not, see <http://www.gnu.org/licenses/>.
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##
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function usage {
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echo "Usage: $(basename $0) SOURCE DEST"
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echo
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echo " SOURCE a path to the subvolume to backup"
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echo " DEST a path to the backup destination"
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exit 1
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}
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set -e
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if [ $# -ne 2 ]; then
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echo -e "invalid args!"
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echo
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usage
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fi
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DATE=$(date +%F_%H-%M-%S)
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SRC=$1
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DEST=$(readlink -f $2)
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if ! btrfs sub show $DEST/.current &> /dev/null; then
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if [ -d $DEST/.current ]; then
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echo -e "destination directory exists and is not a valid btrfs subvolume!"
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echo
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usage
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else
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btrfs sub create $DEST/.current
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fi
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fi
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# rsync options
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OPTS="--archive --acls --xattrs"
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OPTS+=" --progress --human-readable"
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OPTS+=" --delete --delete-excluded"
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OPTS+=" --exclude /dev/"
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OPTS+=" --exclude /proc/"
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OPTS+=" --exclude /sys/"
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OPTS+=" --exclude /tmp/"
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OPTS+=" --exclude /run/"
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OPTS+=" --exclude /mnt/"
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OPTS+=" --exclude /media/"
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OPTS+=" --exclude /lost+found/"
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# sync with remote
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rsync $OPTS $SRC $DEST/.current/
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# create new readonly snapshot
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btrfs subvolume snapshot -r $DEST/.current $DEST/$DATE
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# create symlink to latest snapshot
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ln -sf $DATE latest
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