Moving From Kubernetes to OpenShift

Question 1

File updated by oc login

Answer 1

~/.kube/config

Question 2

What is the structure of ~/.kube/config

Answer 2

1) Clusters (name, server, insure)
2) Contexts (server, namespace, user)
2) Users (name, token)

Question 3

Command for inspecting login contexts

Answer 3

oc config get-contexts

Question 4

Command to switch login contexts

Answer 4

oc config use-context

Question 5

Command to create a login contexts

Answer 5

oc config set-context

Question 6

Using kubectl CLI and the provided manifest, to create a namespace

Answer 6

kubectl create -f ns.yml

Question 7

Using kubectl find the ingresses in a namespace

Answer 7

kubectl get ingresses.v1.networking.k8s.io

Question 8

Using kubectl apply customization

Answer 8

kubectl apply -k overlays/prod

Question 9

Content of kustomization.yml that changes the image tag of a deployment

Answer 9

Question 10

In one single command display list of deployments, pods, and services

Answer 10

oc get deployments,pods,services

Question 11

Using jq, identify the container image specified by the deployment

Answer 11

oc get deployment/hello -o json | jq ‘.spec.template.spec.containers[0].image’

Question 12

Using jsonpath, identify the container image specified by the deployment

Answer 12

oc get deployment/hello -o jsonpath=’{.spec.template.spec.containers[].image}{“\n”}’

Question 13

Duplicate an image in quay.io

Answer 13

skopeo copy \
docker://quay.io/redhattraining/versioned-hello:v1.0 \
docker://quay.io/your_account/versioned-hello:latest

Question 14

Import the image from quay.io, and enable periodically scheduled imports.

Answer 14

oc import-image \
quay.io/your_account/versioned-hello:latest –confirm –scheduled

Question 15

Add a stream trigger to a deployment

Answer 15

oc set triggers deployment/hello \
–from-image versioned-hello:latest -c hello

Question 16

Verify if a deployment has a stream trigget

Answer 16

oc get deployment/hello -o json | \
jq ‘.metadata.annotations’