Masterzen's Blog

Journey in a software world…

Introducing Mysql-snmp!

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Thanks to Days of Wonder the company I work for, I’m proud to release in Free Software (GPL):

mysql-snmp – monitor a MySQL server with SNMP

History

At Days of Wonder, we’re using MySQL for almost everything since the beginning of the company. We were initially monitoring all our infrastructure with mon and Cricket, including our MySQL servers.

Nine months ago I migrated the monitoring infrastructure to OpenNMS, and at the same we lost the Cricket MySQL monitoring (which was done with direct SQL SHOW STATUS LIKE commands).

I had to find another way, and since OpenNMS excels at SNMP, it was natural to monitor MySQL through SNMP. My browsing crossed this blog post. At about the same time I noticed that Baron Schwartz had released some very good MySQL Cacti Templates, so I decided I should cross both project and started working on mysql-snmp on my free time.

Hopefully, Days of Wonder has an IANA SNMP enterprises sub-number (20267, we use this for monitoring our game servers), so the MIB I wrote for this project is hosted in a natural place in the MIB hierarchy.

What’s this?

It’s a Net-SNMP perl subagent that connects to your MySQL server, and reports various statistics (from show status or show innodb status, or even replication) through SNMP.## But wait, there’s more, there’s OpenNMS support!

If you followed this blog from the very start, you know we’re using OpenNMS to monitor Days of Wonder infrastructure. So I included the various OpenNMS configuration bit to display nice and usable graphs, inspired by the excellent MySQL Cacti Templates.

Here are some examples:

InnoDB transactions

InnoDB Buffer Pool

So, I want it! Where should I look?

The code is hosted in my github repository, and everything you should know is in the mysql-snmp page on my site.

If you use this software, please do not hesitate to contribute, and/or fix bugs :–)

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