We’ve recently decided to supplement the temperature monitoring provided by the UPS units in our IDFs with Raspberry Pis and DHT22s. There’s a nice article on setting them up to pipe data into Zabbix, the monitoring system we use at work, so this is incredibly useful to us.
We use CentOS here, so converting from Raspbian to CentOS wasn’t too tricky, although the Zabbix agent is only available in the un-official, un-QAed armv7hl EPEL repository. Again, nothing too tough here. Not something I’d want on a critical system, perhaps, but if the agent stops working, at least we’ll get alerts. 😉
The problem arose when I went to install Puppet, which we use for long-term configuration maintenance. It turns out that the CentOS 7 OS repository for armv7hl doesn’t include Ruby, which Puppet requires. Now, I’m currently trying to rebuild a Ruby 2.3 RPM on the Raspberry Pi so that I can get Puppet installed. Will post updates here (including a link to the RPM) once I get it figured out.