Summary

The OpenStack telemetry service is similar to other services when it comes to troubleshooting. A wise course of action is to check the various Ceilometer processes that we discussed in the previous sections. You will also want to confirm the successful operation of your message bus, of which Ceilometer will make heavy use. One unique dependency introduced by Ceilometer is the MongoDB database. You can confirm successful configuration and operation of Mongo using the tips discussed in this chapter. It is also worth noting that each service that you want to use with Ceilometer will need to be configured to send its metering data to Ceilometer. Finally, the Ceilometer command-line tool comes with several useful commands that can be leveraged when troubleshooting OpenStack telemetry as well as most of the other OpenStack services. In the next chapter, we will explore some tips to avoid emergency troubleshooting by watching our cluster's performance availability and reliability.