Initial troubleshooting and logging

When you start troubleshooting issues with Ceph, you will first need to determine which Ceph component is causing the issue. This component can sometimes be clearly labeled in a ceph health detail output or a status command, but other times, it will require some further investigation to discover the actual issue. Verifying a high-level cluster's status can also help you determine whether there is just a single failure or an entire node failure. It's also wise to validate that something in your configuration could possibly be attributed to the issue, such as a configuration that is not recommended or a piece of hardware in the environment that is misconfigured. Various recipes in this chapter will help narrow these issues down, but let's begin by looking at a high-level overview of our cluster and what these commands can tell us...