mirror of
https://codeberg.org/hyperreal/techne
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89 lines
1.9 KiB
Org Mode
89 lines
1.9 KiB
Org Mode
#+title: Btrbk
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#+setupfile: ../org-templates/page.org
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** On the host machine
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#+begin_quote
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Run these commands as root
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#+end_quote
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Add a system user for btrbk:
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#+begin_src shell
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useradd -c "Btrbk user" -m -r -s /bin/bash -U btrbk
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#+end_src
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Setup sudo for btrbk:
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#+begin_src shell
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echo "btrbk ALL=NOPASSWD:/usr/sbin/btrfs,/usr/bin/readlink,/usr/bin/test" | tee -a /etc/sudoers.d/btrbk
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#+end_src
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Create a subvolume for each client:
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#+begin_src shell
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mount /dev/sda1 /mnt/storage
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btrfs subvolume create client_hostname
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#+end_src
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** On each client machine
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Create a dedicated SSH key:
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#+begin_src shell
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mkdir -p /etc/btrbk/ssh
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ssh-keygen -t ed25519 -f /etc/btrbk/ssh/id_ed25519
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#+end_src
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Add each client's SSH public key to ~/home/btrbk/.ssh/authorized_keys~ on the NAS machine:
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#+begin_src shell
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ssh-copy-id -i /etc/btrbk/ssh/id_ed25519 btrbk@nas.local
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#+end_src
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Create ~/etc/btrbk/btrbk.conf~ on each client:
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#+begin_src shell
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transaction_log /var/log/btrbk.log
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snapshot_preserve_min latest
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target_preserve 24h 7d 1m 1y
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target_preserve_min 7d
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ssh_user btrbk
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ssh_identity /etc/btrbk/ssh/id_ed25519
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backend btrfs-progs-sudo
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snapshot_dir /btrbk_snapshots
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target ssh://nas.local/mnt/storage/<client hostname>
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subvolume /
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subvolume /home
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snapshot_create ondemand
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#+end_src
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Create directory to store btrbk snapshots on each client machine:
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#+begin_src shell
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mkdir /btrbk_snapshots
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#+end_src
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Create ~/etc/systemd/system/btrbk.service~:
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#+begin_src systemd
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[Unit]
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Description=Daily btrbk backup
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[Service]
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Type=simple
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ExecStart=/usr/bin/btrbk -q -c /etc/btrbk/btrbk.conf run
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#+end_src
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Create ~/etc/systemd/system/btrbk.timer~:
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#+begin_src systemd
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[Unit]
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Description=Daily btrbk backup
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[Timer]
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OnCalendar=*-*-* 23:00:00
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Persistent=true
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[Install]
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WantedBy=timers.target
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#+end_src
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Alternatively, create a shell script to be placed under ~/etc/cron.daily~:
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#+begin_src shell
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#!/usr/bin/env bash
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set -e
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/usr/bin/btrbk -q -c /etc/btrbk/btrbk.conf run >/dev/null
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#+end_src
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