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An OpenShift administrator needs to trigger a rollback of a Deployment to its previous working revision after a failed update. Which oc command should be used?
The correct command to rollback a Deployment to its previous revision is oc rollout undo deployment/my-app. This command reverts the Deployment to the last successful revision.
A developer has created a Kustomization file that applies a namespace prefix and some patches to base Kubernetes manifests. How can the developer apply these manifests to an OpenShift cluster using standard oc tooling without installing standalone Kustomize?
The `oc apply -k ./directory` command uses the integrated Kustomize support in the oc CLI to build and apply the Kustomization. This is the standard way to apply Kustomize manifests in OpenShift without installing standalone Kustomize.
A DeploymentConfig in OpenShift has a Rolling strategy defined. Which parameter in the strategy configuration controls the maximum number of pods that can be created above the desired replica count during the update?
In OpenShift's DeploymentConfig Rolling strategy, maxSurge specifies the maximum number of pods that can be created beyond the desired replica count during an update. This allows the deployment to temporarily exceed the desired number of replicas to ensure zero downtime. For exam…Read full explanation
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