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<!DOCTYPE html>
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<title>Monitoring MySQL restarts with PowerShell - Sipmann</title>
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<h1><b><a href="https://www.sipmann.com/monitoring-mysql-restarts-with-powershell.html" title="Permalink to Monitoring MySQL restarts with PowerShell">Monitoring MySQL restarts with PowerShell</a></b></h1>
<h5>
<i class="fa fa-calendar"></i><time class="w3-opacity" datetime="2020-12-21T13:30:00-03:00"> Mon 21 December 2020</time>
</h5>
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<p><p>Hey folks, it's time for another PowerShell script. If you haven't seen the other ones, check the links below.</p>
<ul>
<li><a href="https://www.sipmann.com/en/monitoring-mysql-replication-with-powershell.html">Monitoring MySQL replication with PowerShell</a></li>
</ul>
<p>Well, this one it's a pretty simple script, but again, if your customer doesn't have a Zabbix server or doesn't allow you to setup one to do the monitoring, a set of scripts can be handy. We start executing some basic query <code>SHOW GLOBAL STATUS LIKE 'Uptime'</code>, with that we'll get exactly what we're looking for.</p>
<p>If for some reason, the command fails (watch for the "global" variable called <code>$lastExitCode</code>), we send an e-mail telling you about that connection problem.</p>
<p>And then, we get to the part where we parse the value, this one is pretty similar to the parse we did on the first post about using PowerShell to monitor MySQL. But we basically look for the Value line, split it by space and then parse the second position to an integer. And then all we have to do is check if the uptime is lower than our threshold, if it is we send an e-mail.</p>
<div class="highlight"><pre><span></span><code><span class="nv">$MailFrom</span> <span class="p">=</span> <span class="s1">'maurio[at]sipmann.com'</span>
<span class="nv">$MailTo</span> <span class="p">=</span> <span class="s1">'mauricio[at]sipmann.com'</span>
<span class="nv">$MysqlHost</span> <span class="p">=</span> <span class="s1">'127.0.0.1'</span>
<span class="nv">$MysqlUser</span> <span class="p">=</span> <span class="s1">'root'</span>
<span class="nv">$MysqlPass</span> <span class="p">=</span> <span class="s1">'123'</span>
<span class="nv">$data</span> <span class="p">=</span> <span class="p">$(</span><span class="n">mysql</span> <span class="n">-h</span> <span class="nv">$MysqlHost</span> <span class="n">-u</span> <span class="nv">$MysqlUser</span> <span class="n">-p</span><span class="s2">"$MysqlPass"</span> <span class="n">-e</span> <span class="s2">"SHOW GLOBAL STATUS LIKE 'Uptime' \G"</span><span class="p">)</span>
<span class="cm"><# Unable to execute the sql Command #></span>
<span class="k">if</span> <span class="p">(</span><span class="nv">$lastExitCode</span> <span class="o">-eq</span> <span class="n">1</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">Send-MailMessage</span> <span class="n">-To</span> <span class="nv">$MailTo</span> <span class="n">-From</span> <span class="nv">$MailFrom</span> <span class="n">-Subject</span> <span class="s1">'Connection problem'</span> <span class="n">-bodyAsHtml</span> <span class="s2">"Connection problem on host ${MysqlHost}"</span> <span class="n">-Credential</span> <span class="nb">Get-Credential</span> <span class="n">-SmtpServer</span> <span class="s1">'smtp.office365.com'</span> <span class="n">-Port</span> <span class="n">587</span> <span class="n">-UseSsl</span>
<span class="n">exit</span>
<span class="p">}</span>
<span class="nv">$UpTime</span> <span class="p">=</span> <span class="no">[int]</span><span class="p">((</span><span class="nv">$data</span> <span class="p">|</span> <span class="nb">Where-Object</span> <span class="p">{</span> <span class="nv">$_</span> <span class="o">-match</span> <span class="s1">'Value:'</span> <span class="p">})</span> <span class="n">-split</span> <span class="s1">'\s+'</span><span class="p">)[</span><span class="n">2</span><span class="p">]</span>
<span class="cm"><# If the uptime is lower then 20 minutes #></span>
<span class="k">if</span> <span class="p">(</span><span class="nv">$UpTime</span> <span class="o">-lt</span> <span class="n">1200</span><span class="p">)</span> <span class="p">{</span>
<span class="nb">Send-MailMessage</span> <span class="n">-To</span> <span class="nv">$MailTo</span> <span class="n">-From</span> <span class="nv">$MailFrom</span> <span class="n">-Subject</span> <span class="s2">"MySQL Restarted"</span> <span class="n">-bodyAsHtml</span> <span class="s2">"MySQL host ${MysqlHost} restarted less than 20 minutes ago"</span> <span class="n">-Credential</span> <span class="nb">Get-Credential</span> <span class="n">-SmtpServer</span> <span class="s1">'smtp.office365.com'</span> <span class="n">-Port</span> <span class="n">587</span> <span class="n">-UseSsl</span>
<span class="p">}</span>
</code></pre></div>
<p>This script (and the other ones I use) is available at my GitHub <a href="https://github.com/sipmann/PowerShellScripts">here</a>. Keep in mind that the ones on the GitHub repo, are a little different from here.</p></p>
</div>
<hr>
<section class="w3-padding" id="translations">
<h4>Translations:</h4>
<ul>
<li><a href="../pt/monitoring-mysql-restarts-with-powershell.html">pt - Monitorando restarts do MySQL com PowerShell</a></li>
</ul>
</section>
<hr>
<section class="w3-padding" id="related-posts">
<h4>Related Posts:</h4>
<ul>
<li><a href="https://www.sipmann.com/mysql-dual-password-functionality.html">Changing a MySQL user password across multiple application instances without downtime</a></li>
<li><a href="https://www.sipmann.com/monitoring-mysql-replication-with-powershell.html">Monitoring MySQL Replication Status with PowerShell</a></li>
<li><a href="https://www.sipmann.com/cloud-not-open-connection-java-mysql-hibernate.html">Could not open connection with MySQL and Hibernate</a></li>
</ul>
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