Ch at 20:27, 4 November 2019

2019-11-04T20:27:30Z

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[[Backup|⇐ Backup]]

==Using <tt>rsnapshot</tt>==

<tt>rsnapshot</tt> is a utility that makes incremental backups and minimises disk space use by using Linux hardlinks

;Install <tt>rsnapshot</tt>
<tt>
:sudo apt-get update
:sudo apt-get upgrade
:sudo apt-get install rsnapshot
</tt>

;Configure <tt>rsnapshot</tt>
:edit <tt>/etc/rsnapshot.conf</tt>
::set root path to e.g.
<tt>
:::snapshot_root /var/lib/rsnapshot/
</tt>
::end ensure we have the following command paths set
<tt>
:::cmd_cp /bin/cp
:::cmd_rm /bin/rm
:::cmd_rsync /usr/bin/rsync
:::cmd_ssh /usr/bin/ssh
:::cmd_du /usr/bin/du
</tt>
::set up the backup intervals to e.g.
<tt>
:::retain alpha 6
:::retain beta 7
:::retain gamma 4
:::#retain delta 3
</tt>
::set the <tt>rsync</tt> args
<tt>
:::rsync_short_args -a
:::rsync_long_args --delete --numeric-ids --relative --delete-excluded
</tt>
::and set the <tt>rsync</tt> exclude file (see [[Using rsync]]),
::If intending to backup locally exclude the path to localhost backups, e.g. <tt>/var/lib/rsnapshot</tt>
::e.g.
<tt>
:::exclude_file /PiBackup_exclude.txt
</tt>
::edit the backup point list, e.g.
<tt>
:::backup / localhost/
</tt>

;Configure <tt>cron</tt>
:add scripts to the <tt>/etc/cron.daily, /etc/cron.weekly and /etc/cron.monthly</tt> directories
::of the form
<tt>
:::#!/bin/sh
:::test -x /usr/bin/rsnapshot || exit 0
:::/usr/bin/rsnapshot alpha
</tt>
::substituting the appropriate backup interval name configured above, e.g. alpha, beta, gamma

;Can keep a mirror on another server by using rsync
::we keep hard links (which rsnapshot relies on) and use numeric-ids so that users aren't mapped from server1's user namespace to server2's
:<tt>rsync -aHv --delete-delay --numeric-ids --exclude-from=/<excludefile>.txt / <dest> >> /<logfile>.log</tt>
::this could be tagged onto the end of the <tt>/etc/cron.daily/rsnapshot</tt> cron job

Using rsnapshot - Revision history

Ch at 20:27, 4 November 2019