Free Linux Foundation CKA Exam Dumps and CKA Exam Questions

Question No: 1

MultipleChoice

SIMULATION

Create a deployment as follows:

Name: nginx-app

Using container nginx with version 1.11.10-alpine

The deployment should contain 3 replicas

Next, deploy the application with new version 1.11.13-alpine, by performing a rolling update.

Finally, rollback that update to the previous version 1.11.10-alpine.

Options

ASee the solution below

Question No: 2

MultipleChoice

List all persistent volumes sorted by capacity, saving the full kubectl output to /opt/KUCC00102/volume_list. Use kubectl 's own functionality for sorting the output, and do not manipulate it any further.

Options

AExplanation:
solution

Question No: 3

MultipleChoice

Ensure a single instance of pod nginx is running on each node of the Kubernetes cluster where nginx also represents the Image name which has to be used. Do not override any taints currently in place.

Use DaemonSet to complete this task and use ds-kusc00201 as DaemonSet name.

Options

AExplanation:
solution

Question No: 4

MultipleChoice

Perform the following tasks:

Add an init container to hungry-bear (which has been defined in spec file /opt/KUCC00108/pod-spec-KUC C00108.yaml )

The init container should create an empty file named /workdir/calm.txt

If /workdir/calm.txt is not detected, the pod should exit

Once the spec file has been updated with the init container definition, the pod should be created

Options

AExplanation:
solution

Question No: 5

MultipleChoice

Monitor the logs of pod foo and:

Extract log lines corresponding to error

unable-to-access-website

Write them to /opt/KULM00201/foo

Options

AExplanation:
solution

Question No: 6

MultipleChoice

Get the number of schedulable nodes and write to a file

/opt/schedulable-nodes.txt

Options

Akubectl get nodes -o jsonpath='{range
.items[*]}{.metadata.name}
{.spec.taints[?(@.effect=='NoSchedule')].effect}{\'\n\'}{end}'
| awk 'NF==1 {print $0}' > /opt/schedulable-nodes.txt
// Verify
cat /opt/schedulable-nodes.txt

Bkubectl get nodes -o jsonpath='{range
.items[*]}{.metadata.name}
{.spec.taints[?(@.effect=='NoSchedule')].effect}{\'\n\'}{end}'
| awk 'NF==11 {print $0}' > /opt/schedulable-nodes.txt
// Verify
cat /opt/schedulable-nodes.txt

Question No: 7

MultipleChoice

Fix a node that shows as non-ready

Options

AKubectl get nodes
// Check which node shows a not ready
kubectl describe nodes ''node-name''
// Login to the node which shows as not ready and check the
process for kubelet, docker , kube-proxy.
// systemctl status kubelet (or) ps -aux | grep -i ''processname''
// If the process is not started, then start using
systemctl start kubelet / docker
// Verify
ps -auxxww | grep -i ''process-name''
kubectl get nodes

BKubectl get nodes
// Check which node shows a not ready
kubectl describe nodes ''node-name''
// Login to the node which shows as not ready and check the
systemctl start kubelet / docker
// Verify
ps -auxxww | grep -i ''process-name''
kubectl get nodes

Question No: 8

CorrectText

Label a node as app=test and verify

Question No: 9

MultipleChoice

Deploy a pod with image=redis on a node with label disktype=ssd

Options

A// Get list of nodes
kubectl get nodes
//Get node with the label disktype=ssd
kubectl get no -l disktype=ssd
// Create a sample yaml file
kubectl run node-redis --generator=run-pod/v1 --image=redis --dry
run -o yaml > test-redis.yaml
// Edit test-redis.yaml file and add nodeSelector
vim test-redis.yaml
apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
nodeSelector:
disktype: ssd
containers:
- name: node-redis
image: redis
imagePullPolicy: IfNotPresent
kubectl apply -f test-redis.yaml
/ // Verify
K kubectl get po -o wide

B// Get list of nodes
kubectl get nodes
//Get node with the label disktype=ssd
kubectl get no -l disktype=ssd
// Create a sample yaml file
kubectl run node-redis --generator=run-pod/v1 --image=redis --dry
run -o yaml > test-redis.yaml
// Edit test-redis.yaml file and add nodeSelector
vim test-redis.yaml
apiVersion: v1
- name: node-redis
image: redis
imagePullPolicy: IfNotPresent
kubectl apply -f test-redis.yaml
/ // Verify
K kubectl get po -o wide

Question No: 10

MultipleChoice

Add a taint to node "worker-2" with effect as "NoSchedule" and

list the node with taint effect as "NoSchedule"

Options

A// Add taint to node 'worker-2'
kubectl taint nodes worker-2 key=value:NoSchedule
.items[*]}{.metadata.name} {.spec.taints[?(
@.effect=='NoSchedule' )].effect}{\'\n\'}{end}' | awk 'NF==2
{print $0}'

B// Add taint to node 'worker-2'
kubectl taint nodes worker-2 key=value:NoSchedule
// Verify
// Using ''custom-coloumns'' , you can customize which coloumn to
be printed
kubectl get nodes -o customcolumns=NAME:.metadata.name,TAINTS:.spec.taints --no-headers
// Using jsonpath
kubectl get nodes -o jsonpath='{range
.items[*]}{.metadata.name} {.spec.taints[?(
@.effect=='NoSchedule' )].effect}{\'\n\'}{end}' | awk 'NF==2
{print $0}'