Nova is one of the central services of OpenStack, and it is also one of the largest in terms of lines of code. It's also worth noting that Nova is one of the oldest OpenStack projects, and it has seen a lot of changes and development over the years. Nova leverages and interacts with many of the other OpenStack services. As a result, isolating and troubleshooting problems with Nova can be challenging, but in this chapter, we will give you the necessary tips to be successful.
When troubleshooting Nova, it helps to follow a series of steps as you seek to isolate the problems you may encounter. In this chapter, we will work through each of the following topics step by step as we troubleshoot Nova:
Checking the services
Checking the database
Checking the authentication settings
Checking the Glance integration
Checking the Neutron integration