Show OpenShift Version
[kni@bastion ~]$ oc get clusterversion
NAME VERSION AVAILABLE PROGRESSING SINCE STATUS
version 4.6.4 True False 6d2h Cluster version is 4.6.4
Accessing the Web Console
Once your deployment is complete, you can use the following command to determine the web console url
[kni@bastion ~]$ oc whoami --show-console
https://console-openshift-console.apps.ocp.lab.localdomain
By default, your username for the console is kubeadmin, use the command below to obtain your password. Note, your cluster directory may not be clusterconfigs however this is the default
[kni@bastion ~]$ cat clusterconfigs/auth/kubeadmin-password
KLNf6-JEjPC-A6cha-PJfftWorking with Nodes
Show nodes.
[kni@bastion ~]$ oc get nodes
NAME STATUS ROLES AGE VERSION
master-0 Ready master,worker 6d3h v1.19.0+9f84db3
master-1 Ready master,worker 6d3h v1.19.0+9f84db3
master-2 Ready master,worker 6d3h v1.19.0+9f84db3
Show baremetal hardware nodes.
Oops I have errors..
[kni@bastion ~]$ oc get bmh -n openshift-machine-api
NAME STATUS PROVISIONING STATUS CONSUMER BMC HARDWARE PROFILE ONLINE ERROR
master-0 OK externally provisioned ocp-d9z87-master-0 ipmi://10.1.99.2:6230 true
master-1 OK externally provisioned ocp-d9z87-master-1 ipmi://10.1.99.2:6231 true
master-2 OK externally provisioned ocp-d9z87-master-2 ipmi://10.1.99.2:6232 true
worker-0 error registration error ipmi://10.1.99.2:623 true Failed to get power state for node c8105b63-3697-419c-9cab-fdfa9985411a. Error: IPMI call failed: power status.
worker-1 error inspecting ipmi://10.1.99.2:6234 true Introspection timeout
Delete a baremetal node.
[kni@bastion ~]$ oc delete bmh worker-0 -n openshift-machine-api
baremetalhost.metal3.io "worker-0" deleted
Working with Projects
Show Current Project
[kni@bastion ~]$ oc project
Using project "openshift-machine-api" on server "https://api.ocp.lab.localdomain:6443".Create a New Project
[kni@bastion ~]$ oc new-project testproject
Now using project "testproject" on server "https://api.ocp.lab.localdomain:6443".Change Current Project
If the project does not already exist, you will get an error
[kni@bastion ~]$ oc project testproject
Now using project "testproject" on server "https://api.ocp.lab.localdomain:6443".Show Status of Current Project
[kni@bastion ~]$ oc status
In project testproject on server https://api.ocp.lab.localdomain:6443
You have no services, deployment configs, or build configs.
Run 'oc new-app' to create an application.
Delete a Project
[kni@bastion ~]$ oc delete project testproject
project.project.openshift.io "testproject" deleted
List all Projects
[kni@bastion ~]$ oc get projects
NAME DISPLAY NAME STATUS
default Active
kube-node-lease Active
kube-public Active
kube-system Active
openshift Active
openshift-apiserver Active
openshift-apiserver-operator Active
--trunc--Working with Pods
Show all Pods in a Particular Namespace
oc get pods will shows you the pods in your current namespace. Use -n to specify a pod by name. Use -A to specify all pods.
[kni@bastion ~]$ oc get pod -n openshift-dns
NAME READY STATUS RESTARTS AGE
dns-default-64gcs 3/3 Running 0 4d1h
dns-default-dttgz 3/3 Running 0 4d1h
dns-default-jwmdx 3/3 Running 0 4d1h
Wide listing of Pods in a Particular Namespace
-o wide allows you to see the pod IP address and the node where it is running.
[kni@bastion ~]$ oc get pods -n openshift-console -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
console-65c4b9c45b-gts2h 1/1 Running 0 4d 10.129.0.58 master-1 <none> <none>
console-65c4b9c45b-jqrhp 1/1 Running 0 4d 10.128.0.44 master-0 <none> <none>
downloads-65c97dd5b9-mwpfd 1/1 Running 0 4d1h 10.129.0.53 master-1 <none> <none>
downloads-65c97dd5b9-np5hh 1/1 Running 0 4d1h 10.130.0.40 master-2 <none> <none>
Show Pod Resource Usage
The command below will allow you to see number of Cores and Memory used per pod. Measured in millicores (# of host cores * 1000) and bytes.
[kni@bastion ~]$ oc adm top pods -A
NAMESPACE NAME CPU(cores) MEMORY(bytes)
openshift-apiserver apiserver-c95cd4bfd-92h9s 20m 207Mi
openshift-apiserver apiserver-c95cd4bfd-kfkd7 22m 243Mi
openshift-apiserver apiserver-c95cd4bfd-nbm26 24m 227Mi
openshift-apiserver-operator openshift-apiserver-operator-54ff4fb46f-jnxzn 16m 98Mi
openshift-authentication oauth-openshift-8bcb6778d-lnqvj 4m 49Mi
openshift-authentication oauth-openshift-8bcb6778d-svffg 3m 37Mi
openshift-authentication-operator authentication-operator-5687669dcd-5vrmk 29m 102Mi
openshift-cloud-credential-operator cloud-credential-operator-5bc7bbcdc5-w2hwt 2m 98Mi
openshift-cluster-machine-approver machine-approver-6bbc78c46b-mmzdf 0m 49Mi
openshift-cluster-node-tuning-operator cluster-node-tuning-operator-57d7f9b947-xkrd8 0m 25Mi