Notes on common management commands of openshift

oc status--- check current namespace status

oc project ibm-common-services --- switch to the namespace/project ibm-common-services

oc get pods -o wide --- list all pods in current namespace in details,-o wide flags to view the pod IP address and the node where the pod is located.

READY  --- means how many containers in this pod are considered ready
STATUS --- RUNNING: the Pod has been bound to a node, and all of the containers
have been created. At least one container is still running, or is in the 
process of starting or restarting.
       --- Completed:inside pod’s container process has been successfully 
           completed and no more process left for completion.
       --- PENDING:The Pod has been accepted by the Kubernetes cluster, but 
           one or more of the containers has not been set up and made ready to
           run. This includes time a Pod spends waiting to be scheduled as well
           as the time spent downloading container images over the network.
       --- Unknown:For some reason the state of the Pod could not be obtained. 
           This phase typically occurs due to an error in communicating with 
           the node where the Pod should be running.
       --- Failed:All containers in the Pod have terminated, and at least
           one container has terminated in failure. That is, the container
           either exited with non-zero status or was terminated by the system.

oc get pods --field-selector=status.phase=Succeeded -n ibm-common-services --- list all Completed pods

oc get pod --no-headers --all-namespaces -o wide| grep -Ev '([[:digit:]])/\1.*R' | grep -v 'Completed' --- This command can filter out the problematic pod

oc get pod my-pod -o yaml --- Get a pod's YAML, Later, if jsonpath Specify only what you want to list , The expression after the equal sign can be read first pod yaml Content

oc adm top pods -n ibm-common-services --- display CPU, memory and storage usage statistics about pods

oc logs -f <pod_name> -c <container_name> --- View the log for a specific pod

oc exec ibm-cpd-wkc-operator-59f7d8cd45-nds4n -- ls -ahl /var/log --- List log files and subdirectories contained in /var/log within a pod

oc rsh ibm-cpd-wkc-operator-59f7d8cd45-nds4n --- start a remote access into a pod.If a pod has multiple containers, oc rsh defaults to the first container unless -c <container_name> is specified.

oc cp <local_path> <pod_name>:/<path> -c <container_name> --- Copy a file to a pod.

oc cp <pod_name>:/<path> -c <container_name><local_path> --- Copy a file from a pod.

oc get pods ibm-cpd-wkc-operator-59f7d8cd45-nds4n -o jsonpath='{.spec.containers[*].name}' --- list all container names defined in a pod spec.

oc get pod -l icpdsupport/addOnId=wkc --- list wkc related pods only

oc get ibmcpd ibmcpd-cr -o yaml > ibmcpd-cr.yaml  export pod yaml file

oc apply -f ibmcpd-cr.yaml --overwrite=true  to update pod yaml file

oc get pods -l component=zen-watcher  List the same label All of the pod

oc delete pods -l component=zen-watcher  Delete Hit the same label All of the pod

Ongoing update

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