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<h1 class="post-title">MySQL backup script</h1>
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<time class="post-date" datetime="2016-03-13T00:00:00&#43;01:00">
13 March 2016
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<p>I wrote a MySQL database backup script a while back. I known they are more than enough of them already floating around the internet, but hey, I figured I&rsquo;d share it here anyway.</p>
<h2 id="the-script">The script</h2>
<p>For the script to work, you&rsquo;ll need to edit a few variable to match your configuration.</p>
<ul>
<li><code>BACKUPDIR</code> is the path of the directory where you want your backups to be stored.</li>
<li><code>BACKUPUSR</code> is the user that will connect to MySQL to dump the databases. It should have access to all you databases without needing a password.</li>
<li><code>EXCLUDELIST</code> is a list of databases that should not be backed-up. Leaving it as is is probably fine.</li>
</ul>
<pre><code class="language-bash">#!/bin/bash
BACKUPDIR=&quot;/home/user/backup&quot;
BACKUPUSR=&quot;user&quot;
EXCLUDELIST=&quot;^Databases$|^information_schema$|^mysql$|^performance_schema$&quot;
sqlbk() {
for each in $(mysqlshow | awk '/[[:alnum:]]/{print $2}'); do
if [[ $each =~ $EXCLUDELIST ]]; then
true
else
mysqldump $each | bzip2 &gt; ${BACKUPDIR}/${each}.sql.bz2
chown ${BACKUPUSR}: ${BACKUPDIR}/${each}.sql.bz2 &amp;&amp; chmod 600 ${BACKUPDIR}/${each}.sql.bz2
fi
done
}
[[ -e /etc/init.d/mysql ]] &amp;&amp; sqlbk
</code></pre>
<p>I personnaly have this script running once a week, in my user&rsquo;s personnal crontab (editable using the <code>crontab -e</code> command) :</p>
<pre><code>## WEEKLY DATABASE BACKUP
@weekly /home/user/bin/backupdb
</code></pre>
<h1 id="conclusion">Conclusion</h1>
<p>You&rsquo;ve probably noticed that the script erases the previous backup when a new one is made.</p>
<p>I don&rsquo;t need to keep multiple versions of the same database backup on my servers because they are all saved remotely on a daily basis using <a href="http://rsnapshot.org/">Rsnapshot</a>. I&rsquo;ll probably write an article on the subject in the future.</p>
<p>As usual, feedback is always appreciated !</p>
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