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<h1 class="post-title">MySQL backup script</h1>
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<section class="post-meta">
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<time class="post-date" datetime="2016-03-13T00:00:00+01:00">
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13 March 2016
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<section class="post-content">
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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’d share it here anyway.</p>
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<h2 id="the-script">The script</h2>
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<p>For the script to work, you’ll need to edit a few variable to match your configuration.</p>
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<ul>
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<li><code>BACKUPDIR</code> is the path of the directory where you want your backups to be stored.</li>
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<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>
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<li><code>EXCLUDELIST</code> is a list of databases that should not be backed-up. Leaving it as is is probably fine.</li>
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</ul>
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<pre><code class="language-bash">#!/bin/bash
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BACKUPDIR="/home/user/backup"
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BACKUPUSR="user"
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EXCLUDELIST="^Databases$|^information_schema$|^mysql$|^performance_schema$"
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sqlbk() {
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for each in $(mysqlshow | awk '/[[:alnum:]]/{print $2}'); do
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if [[ $each =~ $EXCLUDELIST ]]; then
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true
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else
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mysqldump $each | bzip2 > ${BACKUPDIR}/${each}.sql.bz2
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chown ${BACKUPUSR}: ${BACKUPDIR}/${each}.sql.bz2 && chmod 600 ${BACKUPDIR}/${each}.sql.bz2
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fi
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done
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}
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[[ -e /etc/init.d/mysql ]] && sqlbk
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</code></pre>
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<p>I personnaly have this script running once a week, in my user’s personnal crontab (editable using the <code>crontab -e</code> command) :</p>
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<pre><code>## WEEKLY DATABASE BACKUP
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@weekly /home/user/bin/backupdb
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</code></pre>
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<h1 id="conclusion">Conclusion</h1>
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<p>You’ve probably noticed that the script erases the previous backup when a new one is made.</p>
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<p>I don’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’ll probably write an article on the subject in the future.</p>
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<p>As usual, feedback is always appreciated !</p>
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<h4><a href="https://www.captainark.net/">Antoine Joubert</a></h4>
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<p>Geek | Gamer | TV Shows Aficionado</p>
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