In this chapter, you learned the importance of monitoring your Ceph cluster and its supporting infrastructure. You should also have a good understanding of the various components that you should monitor and some example tools that can be used. We covered some of the PG states that, in conjunction with a monitoring solution will allow you to understand the current status of your Ceph cluster. Finally, we deployed a highly scalable monitoring system comprising collectd, Graphite, and Grafana, which will enable you to create professional looking dashboards to show the status and performance of your Ceph cluster.

In the next chapter, we will look at ways to tune the performance of you Ceph cluster, this leans heavily on being able to capture performance stats, which you should now be able to do following this chapter.