7+

Question 1

A ‘PodSelector’ field in a network policy maps to what?

Answer 1

A label within a pod

Question 2

‘app’ is defined where?

Answer 2

Within deployment manifest

Question 3

____ volumes create storage on a node when the pod is assigned to the node. The storage disappears when the pod leaves the node.

Answer 3

EmptyDir

Question 4

How does a PVC bind to a PV?

Answer 4

via the ‘storageClassName’

Question 5

kubectl command to view the stdout of a container?

Answer 5

logs

Question 6

kubectl command to perform a shell command on the container?

Answer 6

exec

Question 7

pod securityContext spec fields

Answer 7

1. runAsUser

2. fsGroup

Question 8

resources fields

Answer 8

1. request (memory, cpu)

2. limits (memory, cpu)

Question 9

how to export pod descriptor and save to file?

Answer 9

kubectl get pod [podname] -n [namespace] -o yaml –export > nginx-pod.yml

Question 10

add to delete commands

Answer 10

–grace-period=0 –force

Question 11

some debugging options for a bad pod

Answer 11

kubectl get pods -n [namespace]

kubectl top pods -n [namespace]

kubectl logs [podname] -n [namespace]

Question 12

how to remove extraneous info from yaml output?

Answer 12

add –export after -o yaml

Question 13

what is caveat of ‘export’ flag?

Answer 13

It removes the ‘namespace’ from the pod manifest, so you will have to specify the namespace when you kubectl apply

Question 14

how to change image of deployment?

Answer 14

kubectl set image deployment/[deployment] imageName=image

Question 15

how to see rollout status?

Answer 15

kubectl rollout status deployment/[deploymentname]

Question 16

how to undo a rollout?

Answer 16

kubectl rollout undo deployment/[deploymentName]

Question 17

how do you get a deployment to target specific pod/s

Answer 17

via the selector.matchLabels value in the deployment spec

Question 18

what is a nodeport?

Answer 18

It is the publicly accessible port exposed by the service. Part of service spec (when type is NodePort)

Question 19

what is a containerport?

Answer 19

The exposed port of a container. (part of container spec in pod)

Question 20

how to switch cluster context?

Answer 20

kubectl config set-context –current –namespace [namespace]

Question 21

how to write a pod manifest via kubectl?

Answer 21

kubectl run nginx –image=nginx –dry-run=client -o yaml > pod.yaml

Question 22

dry run flag?

Answer 22

–dry-run=client