initial
This commit is contained in:
13
README.md
13
README.md
@@ -1,3 +1,12 @@
|
||||
# btrfs-backup
|
||||
Use BTRFS Snapshots For Backups
|
||||
===============================
|
||||
|
||||
Scripts for using btrfs snapshot feature in backups.
|
||||
Try: btrfs-snapshots.sh --help
|
||||
|
||||
Setup daily btrfs snapshot of all mounted subvols in `/etc/fstab`:
|
||||
|
||||
sudo cp btrfs-snapshots.sh /etc/cron.daily/btrfs-snapshots
|
||||
|
||||
If you want hourly bakups, just enter:
|
||||
|
||||
sudo cp btrfs-snapshots.sh /etc/cron.hourly/btrfs-snapshots
|
||||
|
82
btrfs-snapshots.sh
Executable file
82
btrfs-snapshots.sh
Executable file
@@ -0,0 +1,82 @@
|
||||
#!/bin/bash -e
|
||||
|
||||
BTRFS_VOLUMES=${BTRFS_VOLUMES:-$(awk '!/^#/ && $3=="btrfs" {print $2}' /etc/fstab | tr '\n' ' ' | sed 's, $,,')}
|
||||
TMP_MNT=${TMP_MNT:-/var/tmp/btrfs-backup}
|
||||
|
||||
vols=()
|
||||
del=
|
||||
dryrun=0
|
||||
while test $# -gt 0; do
|
||||
case "$1" in
|
||||
(-h|--help) cat <<EOF
|
||||
$0 [OPTIONS]
|
||||
|
||||
OPTIONS
|
||||
|
||||
-h, --help show this help
|
||||
-n, --dry-run execute dry run, do not backup, just show commands
|
||||
-p, --path <path> add a path that contains a btrfs (sub-) volume
|
||||
(defaults to: ${BTRFS_VOLUMES})
|
||||
-m, --mnt <path> temporary mount point (default: ${TMP_MNT})
|
||||
|
||||
not yet implemented:
|
||||
|
||||
-d, --del <days> delete snapshots older than given number of days
|
||||
|
||||
ENVIRONMENT
|
||||
|
||||
BTRFS_VOLUMES specify all volume pathes (instead of -p)
|
||||
TMP_MNT temporary mount point (instead of -m)
|
||||
|
||||
DESCRIPTION
|
||||
|
||||
Creates a snapshot for all btrfs volumes specified. Snapshot is named
|
||||
from the subvol name or if there is no subvol, from the path by
|
||||
appending -snapshot-YYYY-MM-DD-HH-mm.
|
||||
|
||||
EOF
|
||||
exit;;
|
||||
(-n|--dry-run) dryrun=1;;
|
||||
(-p|--path) shift; vols+=( "$1" );;
|
||||
(-m|--mnt) shift; TMP_MNT="$1";;
|
||||
(-d|--del) shift; del="$1";;
|
||||
(*) echo "ERROR: unknown option $1, try $0 --help" 1>&2
|
||||
exit 1;;
|
||||
esac
|
||||
if test $# -lt 1; then
|
||||
echo "ERROR: missing argument, try $0 --help" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
shift
|
||||
done
|
||||
|
||||
BTRFS_VOLUMES=${BTRFS_VOLUMES:-$(awk '!/^#/ && $3=="btrfs" {print $2}' /etc/fstab)}
|
||||
TMP_MNT=${TMP_MNT:-/var/tmp/btrfs-backup}
|
||||
|
||||
test -d "${TMP_MNT}" || mkdir -p "${TMP_MNT}"
|
||||
for fs in ${BTRFS_VOLUMES}; do
|
||||
device=$(mount | awk '$3=="'$fs'" && $5=="btrfs" {print $1}')
|
||||
subvol=$(mount | awk '$3=="'$fs'" && $5=="btrfs" {split(substr($6, 2, length($6)-2), res, ","); for (r in res) {if (res[r]~/^subvol=/) {sub(/^subvol=/,"" , res[r]); print res[r]}}}')
|
||||
if test -n "$subvol"; then
|
||||
name=${subvol}
|
||||
else
|
||||
if test "$fs" = "/"; then
|
||||
name="@root"
|
||||
else
|
||||
name=${fs#/}
|
||||
name=${name%/}
|
||||
name=${name//\//-}
|
||||
fi
|
||||
fi
|
||||
target="${name}-snapshot-$(date +%Y-%m-%d-%H-%M)"
|
||||
if test $dryrun -eq 1; then
|
||||
echo btrfs subvolume snapshot "${TMP_MNT}${subvol}" "${TMP_MNT}/${target}"
|
||||
else
|
||||
if mount | grep -q " on $TMP_MNT type "; then
|
||||
sudo umount "$TMP_MNT"
|
||||
fi
|
||||
sudo mount "$device" "$TMP_MNT"
|
||||
sudo btrfs subvolume snapshot "${TMP_MNT}${subvol}" "${TMP_MNT}/${target}"
|
||||
sudo umount "$TMP_MNT"
|
||||
fi
|
||||
done
|
Reference in New Issue
Block a user