In this chapter, you learned:
There are several personas in the OpenStack ecosystem, and Red Hat has used the Domain Operator persona to define the use cases and operations for this course. Your role may include the responsibilities of more than one persona.
OpenStack can be managed using the openstack unified command-line client, or with the browser-based Dashboard.
Launching an instance requires a minimum of three items specified; the image, the flavor, and the network.
OpenStack has many services including Compute, Image, Orchestration, Identity, Networking, and Object Store.
There are three predefined roles for nodes in an OpenStack deployment; control, compute, and ceph-storage. The predefined roles are collections of related services, however you can create a custom role by combining services in a way that suits your needs.
To ensure high availability of services, there are some minimum node numbers for certain roles. You should have a minimum of three control nodes, and three ceph-storage nodes if you are using Ceph. Compute node capacity should allow for at least a single node failure. That is, if you need N compute nodes to support your workload, you should deploy N+1 compute nodes.
Click CREATE to build all of the virtual machines needed for the classroom lab environment. This may take several minutes to complete. Once created the environment can then be stopped and restarted to pause your experience.
If you DELETE your lab, you will remove all of the virtual machines in your classroom and lose all of your progress.