Free Access LinuxFoundation.CKA.v2022-08-23.q63 Practice Test (Page 7)

Question 26

List all the pods showing name and namespace with a json path expression

Question 27

Score: 7%

Task
Given an existing Kubernetes cluster running version 1.20.0, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.20.1.
Be sure to drain the master node before upgrading it and uncordon it after the upgrade.

You are also expected to upgrade kubelet and kubectl on the master node.

Question 28

Create and configure the servicefront-end-serviceso it's accessiblethroughNodePortand routes to theexisting pod namedfront-end.

Question 29

Create a pod with init container which waits for a service called "myservice" to be created. Once init container completes, the myapp-container should start and print a message "The app is running" and sleep for 3600 seconds.

A.vim multi-container-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox:1.28
command: ['sh', '-c', 'echo The app is running! && sleep
3600']
initContainers:
- name: init-myservice
image: busybox:1.28
command: ['sh', '-c', "until nslookup myservice.$(cat
/var/run/secrets/kubernetes.io/serviceaccount/namespace).s
vc.cluster.local; do echo waiting for myservice; sleep 2;
done"]
// Check whether service called "myservice" exists
kubectl get svc
Note: Pod will not start if service called "myservice" doesn't
exist.
// Now, Create the pod
kubectl apply -f multi-container-pod.yaml

B.vim multi-container-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox:1.28
command: ['sh', '-c', 'echo The app is running! && sleep
3600']
initContainers:
- name: init-myservice
done"]
// Check whether service called "myservice" exists
kubectl get svc
Note: Pod will not start if service called "myservice" doesn't
exist.
// Now, Create the pod
kubectl apply -f multi-container-pod.yaml

Question 30

Create a pod named kucc8 with a single app container for each of the
following images running inside (there may be between 1 and 4 images specified):
nginx + redis + memcached.

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