mirror of
https://codeberg.org/hyperreal/techne
synced 2024-11-01 14:23:06 +01:00
90 lines
2.6 KiB
Org Mode
90 lines
2.6 KiB
Org Mode
|
#+title: Btrfs
|
||
|
|
#+setupfile: ../org-templates/page.org
|
||
|
|
|
||
|
|
** Setup encrypted external drive for backups
|
||
|
|
*** Prepare the external drive
|
||
|
|
#+begin_src shell
|
||
|
|
sudo cryptsetup --type luks2 -y -v luksFormat /dev/sda1
|
||
|
|
sudo cryptsetup -v luksOpen /dev/sda1 cryptbackup
|
||
|
|
sudo mkfs.btrfs /dev/mapper/cryptbackup
|
||
|
|
sudo mkdir /srv/backup
|
||
|
|
sudo mount -o noatime,compress=zstd:1 /dev/mapper/cryptbackup /srv/backup
|
||
|
|
sudo restorecon -Rv /srv/backup
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
*** Setup ~/etc/crypttab~
|
||
|
|
#+begin_src shell
|
||
|
|
sudo blkid -s UUID -o value /dev/sda1 | sudo tee -a /etc/crypttab
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
Add the following line to ~/etc/crypttab~:
|
||
|
|
#+begin_src shell
|
||
|
|
cryptbackup UUID=<UUID of /dev/sda1> none discard
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
*** Setup ~/etc/fstab~
|
||
|
|
#+begin_src shell
|
||
|
|
sudo blkid -s UUID -o value /dev/mapper/cryptbackup | sudo tee -a /etc/fstab
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
Add the following line to ~/etc/fstab~:
|
||
|
|
#+begin_src shell
|
||
|
|
UUID=<UUID of /dev/mapper/cryptbackup> /srv/backup btrfs compress=zstd:1,nofail 0 0
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
Reload the daemons:
|
||
|
|
#+begin_src shell
|
||
|
|
sudo systemctl daemon-reload
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
Mount the filesystems:
|
||
|
|
#+begin_src shell
|
||
|
|
sudo mount -av
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
*** btrfs-backup script
|
||
|
|
#+begin_src bash
|
||
|
|
#!/usr/bin/env bash
|
||
|
|
|
||
|
|
LOGFILE="/var/log/btrfs-backup.log"
|
||
|
|
SNAP_DATE=$(date '+%Y-%m-%d_%H%M%S')
|
||
|
|
|
||
|
|
# Check if device is mounted
|
||
|
|
if ! grep "/srv/backup" /etc/mtab >/dev/null; then
|
||
|
|
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Backup device is not mounted." | tee -a "$LOGFILE"
|
||
|
|
notify-send -i computer-fail "Backup device is not mounted"
|
||
|
|
exit 1
|
||
|
|
fi
|
||
|
|
|
||
|
|
create_snapshot() {
|
||
|
|
if ! btrfs subvolume snapshot -r "$1" "${1}/.snapshots/$2-$SNAP_DATE" >/dev/null; then
|
||
|
|
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Error creating snapshot of $1" | tee -a "$LOGFILE"
|
||
|
|
notify-send -i computer-fail "Error creating snapshot of $1"
|
||
|
|
exit 1
|
||
|
|
else
|
||
|
|
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Create snapshot of $1: OK" | tee -a "$LOGFILE"
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
send_snapshot() {
|
||
|
|
mkdir -p "/srv/backup/$SNAP_DATE"
|
||
|
|
if ! btrfs send -q "${1}/.snapshots/$2-$SNAP_DATE" | btrfs receive -q "/srv/backup/$SNAP_DATE"; then
|
||
|
|
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Error sending snapshot of $1 to /srv/backup" | tee -a "$LOGFILE"
|
||
|
|
notify-send -i computer-fail "Error sending snapshot of $1 to /srv/backup"
|
||
|
|
exit 1
|
||
|
|
else
|
||
|
|
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Send snapshot of $1 to /srv/backup: OK" | tee -a "$LOGFILE"
|
||
|
|
fi
|
||
|
|
}
|
||
|
|
|
||
|
|
# Create root and home snapshots
|
||
|
|
create_snapshot "/" "root"
|
||
|
|
create_snapshot "/home" "home"
|
||
|
|
|
||
|
|
# Send root and home snapshots
|
||
|
|
send_snapshot "/" "root"
|
||
|
|
send_snapshot "/home" "home"
|
||
|
|
#+end_src
|
||
|
|
|
||
|
|
Move/copy the script to ~/etc/cron.daily/btrfs-backup~.
|