Exam (elaborations)
CKAD TEST 1 QUESTIONS AND ANSWERS CORRECT
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Exam of 7 pages for the course CKAD at CKAD (CKAD TEST 1)
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CKAD TEST 1Command to start a pod - answerkubectl run nginx --image=nginx --restart=Never
Command to change image of a pod - answerkubectl set image pod/nginx
nginx=nginx:1.7.1
Sequence to ping a pod from busybox - answerkubectl run busybox --image=busybox --
restart=Never --rm -it -- sh
# / wget -O- <pod_ip>:80
#/ exit
Output nice yaml from a resource - answerkubectl get pod nginx -o yaml --export
Get logs of a previous version of a pod - answerkubectl logs nginx -p
Attach a process to a running pod - answerkubectl exec -it nginx -- /bin/sh
Set an environment variable from command line - answerkubectl run nginx --
image=nginx --env=var1=val1
Multi-container pod - answerkubectl run busybox --image=busybox -o yaml --dry-run
-- /bin/sh -c 'echo hello;' > pod.yaml
# vi pod.yaml, Copy + Paste container list and rename the container
kubectl create -f pod.yaml
kubectl exec -it busybox -c busybox2 -- /bin/bash # Connect to second container
Create a pod with labels - answerkubectl run --image... --restart=Never --
labels=app=v1,label2=val2
Show labels on pods / resource - answerkubectl get pods --show-labels
Label a running pod - answerkubectl label po nginx app=v2 --overwrite
Get all pods with a certain label - answerkubectl get po -lapp
Remove a label from a running pod - answerkubectl label nginx{1..3} app-
Get documentation for a pod spec - answerkubectl explain po.spec
Annotate a running pod - answerkubectl annotate po nginx description='test description'
kubectl annotate po nginx description- # Remove
, Create pod with 2 replicas and open port 80 from yaml - answerkubectl create deploy
nginx --image=... --dry-run -oyaml > deploy.yaml
vi deploy.yaml
# Change replicas: 2
# Under containers list add following
ports:
- containerPort: 80
kubectl create -f deploy.yaml
Check status and history of a deployment - answerkubectl rollout status deploy nginx
kubectl rollout history deploy nginx
Up replicas of a deployment to 5 - answerkubectl scale deploy nginx --replicas=5
Install a horizontal pod autoscaler on a deployment - answerkubectl autoscale deploy
nginx --min=5 --max=10 --cpu-percent=80
Temporarily disable+enable future updates to a deployment - answerkubectl rollout
pause deploy nginx
kubectl rollout resume deploy nginx
Get history of of a deployment - answerkubectl rollout history deploy nginx --revision=6
Start a "job" pod - answerkubectl run pi --image=perl --restart=OnFailure -- perl ...
Monitor running jobs - answerkubectl get jobs -w
Get the logs of a job/pod (and monitor as it runs) - answerkubectl logs perl-*** -f
Remove a job from history/cluster - answerkubectl delete job pi
Get logs after the pod/job completes - answerkubectl logs job/pi
Job yaml to run concurrently or multiple times - answerjob.spec.completions=5
job.spec.parallelism=5
Command to run a cronjob (view it afterwards) - answerkubectl run pi --image=perl --
restart=OnFailure --schedule="*/1 (four asterisk)"
kubectl get cj
Create confg map command - answerkubectl create cm myconf --from-literal=foo=lala --
from-literal=foo2=lolo
Config map from file or env file - answerecho -e "foo3=lili\nfoo4=lele" > config.txt
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