openshift¶

This content pack provides pieces to build Openshift clusters.

Troubleshooting commands¶

oc get nodes oc get pods oc get clusteroperators oc get clusteroperator monitoring oc get events -n openshift-authentication --sort-by='.metadata.creationTimestamp' oc get multiclusterhub -n open-cluster-management oc describe multiclusterhub multiclusterhub -n open-cluster-management oc adm top nodes

oc get clusterversion oc describe clusterversion

Upgrading¶

oc adm upgrade --to=4.15.36

Testing OpenShift¶

Deploy a test hello application¶

The following assumes a configured KUBECONFIG.

# Create a new project
oc new-project hello-openshift

# Create the deployment
kubectl create deployment hello-node --image=registry.k8s.io/e2e-test-images/agnhost:2.43 -- /agnhost serve-hostname

# Inspect the app to verify the port:
oc get pods
oc rsh deployment/hello-node netstat -tlnp

# Expose the correct port
oc expose deployment hello-node --port=9376

# Expose the service
oc expose service hello-node

# Find the route
oc get route hello-node -n hello-openshift
NAME         HOST/PORT                                        PATH   SERVICES     PORT   TERMINATION   WILDCARD
hello-node   hello-node-hello-openshift.apps.asdf.k8s.local          hello-node   9376                 None

# Verify the route works
curl hello-node-hello-openshift.apps.asdf.k8s.local
hello-node-8dd54cb99-bq5q5

# Scale the deployment
oc scale deployment hello-node --replicas=3
oc get pods
for i in {1..10}; do printf "%s\n" $(curl -s hello-node-hello-openshift.apps.asdf.k8s.local); sleep 1; done

# Cleanup

# Delete the deployment
oc delete deployment hello-node

# Delete the service
oc delete service hello-node

# Delete the route
oc delete route hello-node

# Delete the project
oc delete project hello-openshift

Ideas¶

Status Event, drpcli events post
Cron trigger