Red Hat OpenShift

Commands

Command	Used for...	Notes
oc whoami	See who you are logged in as
oc login	Log in to the cluster	Defaults to using a web login, but user/pass can be provided over the command line
oc new-project	Create a new project (namespace)
oc describe	Get detailed information on a resource instance
oc explain	Get documentation on a resource object
oc api-resources	Get a list of all API resources	--api-group can be used to limit to certain API groups
oc adm top	Get resource usage on pods and similar	--sum will show a sum of resource usage
oc events	Get high-level logs	Helpful for things like image pull or pvc issues
oc debug	Open a shell session in the pod or node	Uses the first container by default, but as a copy; can also be used to log in to physical nodes
oc attach -it	Connect and create an interactive session with a pod
oc image	Get info about an image
skopeo list-tags	List all tags for a given image
skopeo inspect	Get image info like env variables and tags

Commands to avoid using:

Command	Used for	Use instead	Because
oc run	Create a single pod

Important Resource Types

• statefulset
• replica

Resource	Description	Useful for...	OS Only?

Anki Questions

1. What is <resource>?
2. What command should be used to <action>?
3. Where is <resource> useful compared to similar ones?