Now that we have a shiny installation of Graphite and Grafana to look at, we need to put some data into it to be able to generate some graphs. collectd is a well respected metric collection tool, which can output metrics to Graphite. The core collectd application is very minimal, and it relies on a series of plugins to collect metrics and forwards them onto applications such as Graphite for storage.
Before we start collecting metrics from our Ceph nodes, let's install collectd on the same VM as where we installed Graphite and Grafana. We will do this to gain a better understanding of collectd and the process required to configure it. We will then use Ansible to install and configure collectd on all of our Ceph nodes, which would ...
