Cinder provides a persistent block storage service for OpenStack. The service is not overly complex, but there are a few things that can cause it to break. There will likely come a time when you need to troubleshoot Cinder. In this chapter, you learned how to troubleshoot the Cinder processes, check the log files, and confirm the authentication settings. We also looked at how to troubleshoot Cinder and RabbitMQ, and finally, we looked at some common Cinder errors. With the tools and tips presented in this chapter, you should be well on your way to solving the common Cinder issues that come your way. In the following chapter, we will work with Swift, OpenStack's object storage.