135 lines
4.6 KiB
Markdown
135 lines
4.6 KiB
Markdown
# borgwrapper
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Wrapper to simplify backups with borgbackup
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# Installation
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Put the [script](src/borgwrapper) somewhere practical
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cp borgwrapper /usr/local/bin/borgwrapper
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chown root. /usr/local/bin/borgwrapper
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chmod 750 /usr/local/bin/borgwrapper
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# Configuration
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By default borgwrapper expects the configuration to be located at `/etc/borgwrapper/config`.
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An example configuration file is included in [config.example](src/config.example).
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Ensure restrictive permissions on this file as it exposes the passphrase.
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chown root. config
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chmod 600 config
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## Special files
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To be able to dump special files there are a few things that need to be done.
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### Installed package list
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Must have the package **apt-mark** installed.
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### MySql Dump
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Must have the package **mysqldump** installed.
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Must have `.my.cnf` configuration file in `/root` directory.
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Create `.my.cnf` in `/root` directory:
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[mysql]
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user="root"
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password="mysql-root-password"
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[mysqldump]
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user="root"
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password="mysql-root-password"
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Change permissions of `.my.conf`:
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chmod 600 /root/.my.conf
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# Scheduling
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## systemd
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Copy the example systemd [unit files](systemd/) to `/etc/systemd/system/`. Then for each
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configuration file in `/etc/borgwrapper/<config_name>` do:
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systemctl enable borgwrapper-backup@<config_name>.timer
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systemctl enable borgwrapper-verify@<config_name>.timer
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systemctl start borgwrapper-backup@<config_name>.timer
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systemctl start borgwrapper-verify@<config_name>.timer
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The included systemd files are set up using a daily schedule. If you want to
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take backups more often than that you can either change the `Timer` parameters
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directly in the systemd timer files, or if you only want to override them for
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some of the backups you can add per-config overrides by using
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systemctl edit borgwrapper-backup@<config>.timer
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and add the wanted overrides. Here is an example where you run a backup 4 times
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a day (every 6 hours). See the manual for systemd.timer for more information on
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the `OnCalendar` format.
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[Timer]
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OnCalendar=00/6:00
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RandomizedDelaySec=0
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The output will land in
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/etc/systemd/system/borgwrapper-backup@<config>.timer.d/override.conf
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You can just drop files in the directory directly too, without editing via
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systemctl. This is better suited for configuration management systems.
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You can view the backup logs with:
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journalctl -xu borgwrapper-backup@<config_name>
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journalctl -xu borgwrapper-verify@<config_name>
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If you want to run the tasks manually outside the timers you can just start them like usual
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services:
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systemctl start borgwrapper-backup@<config_name>
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systemctl start borgwrapper-verify@<config_name>
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## Cron (use only if systemd is not available)
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# Run the backup daily
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23 1 * * * /usr/local/bin/borgwrapper backup
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# Verify the backups once a month
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40 17 23 * * /usr/local/bin/borgwrapper verify
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# Borg server preparation
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Install borg and then
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adduser --system --group --shell /bin/bash borg
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mkdir /home/borg/.ssh
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chown borg. /home/borg/.ssh
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mkdir /srv/borg
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chown borg. /srv/borg
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chmod 755 /srv/borg
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Generate the needed passwordless ssh-keys as root (the user you run the backup as) on the client
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ssh-keygen
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Copy the content of the generated public key from `/root/.ssh/<key>.pub` to `/home/borg/.ssh/authorized_keys` on the server, with
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some restrictions so it looks something like this:
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command="borg serve --restrict-to-path /srv/borg/<hostname>",no-pty,no-agent-forwarding,no-port-forwarding,no-X11-forwarding,no-user-rc ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDeCInOLjv0hgzI0u1b/p4yYnCEV5n89HIXF1hrLor+ZQ7lSUii21tpn47Aw8RJJAjfDCwCdQ27MXjpzNelBf4KrlAiN1K3FcnGGIiE3XFNoj4LW7oAjzjFgOKC/ea/hXaCI6E8M/Pn5+MhdNN1ZsWNm/9Zp0+jza+l74DQgOE33XhSBjckUchqtBci7BqoCejy2lVvboFA231mSEpPValcKmG2qaNphAkCgAPjtDOx3V6DGQ8e7jfA2McQYxfju6HlpWPUx/li6VJhRa5huczfJ3J/sdfu123s/lgTW4rG5QNng1vt1FOIZ/TkaEsPt2wzD2Qxdwo70qVts3hrd+r root@client
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# Usage
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## Initialize backup repo
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borgwrapper init
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## Backup
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borgwrapper backup
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## Verify backups
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borgwrapper verify
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## Run other borg commands
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### Wrapped and easy
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Use `exec <borg arguments>`. `BORG_REPO` is exported to the environment so use `::` when the repo
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argument is required.
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Examples:
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borgwrapper exec mount :: /mnt
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borgwrapper exec list
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### Borg directly
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Run in subshell if you do not want the passphrase stored in the current shell after the command have exited.
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Examples:
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(. /etc/borgwrapper/config; export BORG_PASSPHRASE; borg mount "$BORG_REPO" /mnt)
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(. /etc/borgwrapper/config; export BORG_PASSPHRASE; borg list "$BORG_REPO")
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