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Difficulty in Attempting CNCF CKA Certification Exam
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NEW QUESTION 19
Score: 13%
Task
A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.
Answer:
Explanation:
See the solution below.
Explanation
Solution:
sudo -i
systemctl status kubelet
systemctl start kubelet
systemctl enable kubelet
NEW QUESTION 20
Check the Image version of nginx-dev pod using jsonpath
Answer:
Explanation:
See the solution below.
Explanation
kubect1 get po nginx-dev -o
jsonpath='{.spec.containers[].image}{"\n"}'
NEW QUESTION 21
Create a Pod nginx and specify a CPU request and a CPU limit of 0.5 and 1 respectively.
- A. // create a yml file
kubectl run nginx-pod --image=nginx --restart=Never --dry-run -
o yaml > nginx-pod.yml
// add the resources section and create
vim nginx-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx
spec:
containers:
- image: nginx
name: nginx
resources:
requests:
cpu: "0.4"
limits:
cpu: "1"
restartPolicy: Always
kubectl apply -f nginx-pod.yaml
// verify
kubectl top pod - B. // create a yml file
kubectl run nginx-pod --image=nginx --restart=Never --dry-run -
o yaml > nginx-pod.yml
// add the resources section and create
vim nginx-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: nginx
name: nginx
spec:
containers:
- image: nginx
name: nginx
resources:
requests:
cpu: "0.5"
limits:
cpu: "1"
restartPolicy: Always
kubectl apply -f nginx-pod.yaml
// verify
kubectl top pod
Answer: B
NEW QUESTION 22
Create 5 nginx pods in which two of them is labeled env=prod and
three of them is labeled env=dev
- A. kubectl run nginx-dev1 --image=nginx --restart=Never --
labels=env=dev
kubectl run nginx-dev2 --image=nginx --restart=Never --
labels=env=dev
kubectl run nginx-prod1 --image=nginx --restart=Never --
labels=env=prod
kubectl run nginx-prod2 --image=nginx --restart=Never --
labels=env=prod - B. kubectl run nginx-dev1 --image=nginx --restart=Never --
labels=env=dev
kubectl run nginx-dev2 --image=nginx --restart=Never --
labels=env=dev
kubectl run nginx-dev3 --image=nginx --restart=Never --
labels=env=dev
kubectl run nginx-prod1 --image=nginx --restart=Never --
labels=env=prod
kubectl run nginx-prod2 --image=nginx --restart=Never --
labels=env=prod
Answer: B
NEW QUESTION 23
Create a file:
/opt/KUCC00302/kucc00302.txt that lists all pods that implement service baz in namespace development.
The format of the file should be one pod name per line.
Answer:
Explanation:
See the solution below.
Explanation
solution
F:\Work\Data Entry Work\Data Entry\20200827\CKA\11 B.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\11 C.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\11 D.JPG
NEW QUESTION 24
Create a pod with environment variables as var1=value1.Check the environment variable in pod
Answer:
Explanation:
See the solution below.
Explanation
kubectl run nginx --image=nginx --restart=Never --env=var1=value1
# then
kubectl exec -it nginx -- env
# or
kubectl exec -it nginx -- sh -c 'echo $var1'
# or
kubectl describe po nginx | grep value1
NEW QUESTION 25
Add a taint to node "worker-2" with effect as "NoSchedule" and
list the node with taint effect as "NoSchedule"
- 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}'
Answer: B
NEW QUESTION 26
Given a partially-functioningKubernetes cluster, identifysymptoms of failure on the cluster.
Determine the node, the failingservice, and take actions to bring upthe failed service and restore thehealth of the cluster. Ensure that anychanges are made permanently.
You cansshto the relevant Inodes (bk8s-master-0orbk8s-node-0) using:
[student@node-1] $ ssh<nodename>
You can assume elevatedprivileges on any node in thecluster with the followingcommand:
[student@nodename] $ | sudo -i
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION 27
Create an nginx pod and set an env value as 'var1=val1'. Check the env value existence within the pod
- A. kubectl run nginx --image=nginx --restart=Never --env=var1=val1
# then
kubectl exec -it nginx -- env
# or
kubectl run nginx --restart=Never --image=nginx --env=var1=val1
-it --rm -- env - B. kubectl run nginx --image=nginx --restart=Never --env=var1=val1
# then
kubectl exec -it nginx -- env
# or
kubectl exec -it nginx -- sh -c 'echo $var1'
# or
kubectl describe po nginx | grep val1
# or
kubectl run nginx --restart=Never --image=nginx --env=var1=val1
-it --rm - env
Answer: B
NEW QUESTION 28
Create a redis pod, and have it use a non-persistent storage
Note: In exam, you will have access to kubernetes.io site,
Refer : https://kubernetes.io/docs/tasks/configure-pod-container/configurevolume-storage/
- A. apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:
- name: redis
image: redis
volumeMounts:
- name: redis-storage
mountPath: /data/redis
ports:
- containerPort: 6379
volumes:
- name: redis-storage
emptyDir: {} - B. apiVersion: v1
kind: Pod
metadata:
name: redis
spec:
containers:
- name: redis
image: redis
volumeMounts:
- containerPort: 6379
volumes:
- name: redis-storage
emptyDir: {}
Answer: A
NEW QUESTION 29
Annotate the pod with name=webapp
- A. kubectl annotate pod nginx-dev-pod name=webapp
kubectl annotate pod nginx-prod-pod name=webapp
// Verify
kubectl describe po nginx-dev-pod | grep -i annotations
kubectl describe po nginx-prod-pod | grep -i annotations - B. kubectl annotate pod nginx-dev-pod name=webapp
kubectl annotate pod nginx-prod-pod name=webapp
// Verify
kubectl describe po nginx-dev-pod | grep -i annotations
Answer: A
NEW QUESTION 30
Create a deployment as follows:
Name: nginx-app
Using container nginx with version 1.11.10-alpine
The deployment should contain
Next, deploy the application with new version , by performing a rolling update.
Finally, rollback that update to the previous version
Answer:
Explanation:
See the solution below.
Explanation
solution
F:\Work\Data Entry Work\Data Entry\20200827\CKA\7 B.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\7 C.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\7 D.JPG
NEW QUESTION 31
Delete persistent volume and persistent volume claim
Answer:
Explanation:
kubectl delete pvc task-pv-claim kubectl delete pv task-pv-volume // Verify Kubectl get pv,pvc
NEW QUESTION 32
Create a redis pod named "test-redis" and exec into that pod and create a file named "test-file.txt" with the text 'This is called the test file' in the path /data/redis and open another tab and exec again with the same pod and verifies file exist in the same path.
- A. vim test-redis.yaml
apiVersion: v1
kind: Pod
metadata:
name: test-redis
spec:
containers:
- name: redis
image: redis
ports:
- containerPort: 6379
volumeMounts:
- mountPath: /data/redis
name: redis-storage
volumes:
kubectl exec -it test-redis /bin/sh
cd /data/redis
echo 'This is called the test file' > file.txt
//open another tab
kubectl exec -it test-redis /bin/sh
cat /data/redis/file.txt - B. vim test-redis.yaml
apiVersion: v1
kind: Pod
metadata:
name: test-redis
spec:
containers:
- name: redis
image: redis
ports:
- containerPort: 6379
volumeMounts:
- mountPath: /data/redis
name: redis-storage
volumes:
- name: redis-storage
emptyDir: {}
kubectl apply -f redis-pod-vol.yaml
// first terminal
kubectl exec -it test-redis /bin/sh
cd /data/redis
echo 'This is called the test file' > file.txt
//open another tab
kubectl exec -it test-redis /bin/sh
cat /data/redis/file.txt
Answer: B
NEW QUESTION 33
From the pod label name=cpu-utilizer, find pods running high CPU workloads and write the name of the pod consuming most CPU to the file /opt/KUTR00102/KUTR00102.txt (which already exists).
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION 34
Resume the rollout of the deployment
Answer:
Explanation:
kubectl rollout resume deploy webapp
NEW QUESTION 35
Create a hostPath PersistentVolume named task-pv-volume with storage 10Gi, access modes ReadWriteOnce, storageClassName manual, and volume at /mnt/data and verify
- A. vim task-pv-volume.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: task-pv-volume
labels:
type: local
spec:
storageClassName: ""
capacity:
storage: 5Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
kubectl apply -f task-pv-volume.yaml
//Verify
kubectl get pv
NAME CAPACITY ACCESS
MODES RECLAIM POLICY STATUS CLAIM
STORAGECLASS REASON AGE
task-pv-volume 5Gi RWO
Retain Available
3s - B. vim task-pv-volume.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: task-pv-volume
labels:
type: local
spec:
storageClassName: ""
capacity:
storage: 5Gi
accessModes:
- ReadWriteOnce
hostPath:
path: "/mnt/data"
kubectl apply -f task-pv-volume.yaml
//Verify
kubectl get pv
NAME CAPACITY ACCESS
MODES RECLAIM POLICY STATUS CLAIM
STORAGECLASS REASON AGE
task-pv-volume 4Gi RWO
Retain Available
8s
Answer: A
NEW QUESTION 36
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.
Answer:
Explanation:
See the solution below.
Explanation
solution
F:\Work\Data Entry Work\Data Entry\20200827\CKA\3 B.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\3 C.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\3 D.JPG
F:\Work\Data Entry Work\Data Entry\20200827\CKA\3 E.JPG
NEW QUESTION 37
Get all the pods with label "env"
Answer:
Explanation:
kubectl get pods -L env
NEW QUESTION 38
Scale the deployment from 5 replicas to 20 replicas and verify
Answer:
Explanation:
kubectl scale deploy webapp --replicas=20 kubectl get deploy webapp kubectl get po -l app=webapp
NEW QUESTION 39
Create a snapshot of the etcd instance running at https://127.0.0.1:2379, saving the snapshot to the file path
/srv/data/etcd-snapshot.db.
The following TLS certificates/key are supplied for connecting to the server with etcdctl:
* CA certificate: /opt/KUCM00302/ca.crt
* Client certificate: /opt/KUCM00302/etcd-client.crt
* Client key: Topt/KUCM00302/etcd-client.key
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION 40
......
CNCF CKA Certification Exam Experience
The one thing I have been constantly aware of after getting my certification is how much I have been able to help out with the company. Prior to getting the certification, all I used to do was oversee projects and do work in a design capacity, but now that I have this certification, people constantly come to me for help with problems they are having. The interactive exam is available online. Delivery will be done within six weeks of the exam. Absolutely no writing is done during the CNCF CKA Certification Exam.
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