Automatically deploy Dell OMSA with Puppet

I’m pretty sure that nowadays every sysadmin out there still managing bare metal hardware and in particulary Dell servers know and use Open Manage Server Administrator (OMSA), which is a very nice and convenient software. The problem with OMSA is that it can be a little cumbersome to install, with all it’s repos and packages (especially on not-officially-supported distros like Ubuntu, Debian or CentOS). As a Puppet user I am, I was looking for a decent module to install the most recent OMSA version on all my machines, but I didn’t find any.

So, I wrote this brand new Open Manage Server Administrator puppet module!

It sports Ubuntu & CentOS support, granular package install and SNMP integration.
If you want the SNMP integration, be sure that your /etc/snmp/snmpd.conf contains this lines:

view systemview included .
view systemview included .
smuxpeer .
smuxpeer .

As I said in the module’s README, you can enable all of these lines through Puppet snmp module only if you use this PR, otherwise you won’t have the second smuxpeer line (whose OID is the StorageServices one).

So, after installing the OMSA module with SNMP support, you can for example easily check all your hardware with this Zabbix template or, if you are a Nagios user, with this plugin


Monitor NDB memory usage with Nagios

We are planning to put online a MySQL NDB Cluster soon (more on this in another post), and one thing you have to do before putting anything in production is to monitor it for problems. In the case of a NDB cluster, you should care about monitoring your limited resources – basically because is a in-memory database – and be alerted when your developers are filling up the dedicated tablespace.

You can do this in two ways: performing a SELECT on the ndbinfo database through the MySQL interface to NDB or parsing the ndb_mgm output. I prefer the latter because maybe I’m using another frontend to the data (native NDB API, memcached etc) and I don’t want to maintain a MySQL server frontend just to check how much space I still have free.

So, you can use this script on GitHub

to parse its output and know if your tablesapce is OK, warning or critical. Feel free to post any comment, fork it and send patches! :)