Linux Foundation CKAD Quiz:3 Topic:10 Questions:11-15

Free Practice Mock Questions Set 11-15 (Quiz # 3) for Linux Foundation CKAD Exam, according to official Linux Foundation Certified Kubernetes Application Developer exam syllabus topic # 10

Question: 1

Refer to Exhibit:

q1_CKAD

Task

A deployment is falling on the cluster due to an incorrect image being specified. Locate the deployment, and fix the problem.

AExplanation:
create deploy hello-deploy --image=nginx --dry-run=client -o yaml > hello-deploy.yaml
Update deployment image tonginx:1.17.4: kubectl set image deploy/hello-deploy nginx=nginx:1.17.4

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Question: 2

Refer to Exhibit:

q2_CKAD

Context

Developers occasionally need to submit pods that run periodically.

Task

Follow the steps below to create a pod that will start at a predetermined time and]which runs to completion only once each time it is started:

* Create a YAML formatted Kubernetes manifest /opt/KDPD00301/periodic.yaml that runs the following shell command: date in a single busybox container. The command should run every minute and must complete within 22 seconds or be terminated oy Kubernetes. The Cronjob namp and container name should both be hello

* Create the resource in the above manifest and verify that the job executes successfully at least once

AExplanation:
Solution:

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Question: 3

Refer to Exhibit:

q3_CKAD

Context

A container within the poller pod is hard-coded to connect the nginxsvc service on port 90 . As this port changes to 5050 an additional container needs to be added to the poller pod which adapts the container to connect to this new port. This should be realized as an ambassador container within the pod.

Task

* Update the nginxsvc service to serve on port 5050.

* Add an HAproxy container named haproxy bound to port 90 to the poller pod and deploy the enhanced pod. Use the image haproxy and inject the configuration located at /opt/KDMC00101/haproxy.cfg, with a ConfigMap named haproxy-config, mounted into the container so that haproxy.cfg is available at /usr/local/etc/haproxy/haproxy.cfg. Ensure that you update the args of the poller container to connect to localhost instead of nginxsvc so that the connection is correctly proxied to the new service endpoint. You must not modify the port of the endpoint in poller's args . The spec file used to create the initial poller pod is available in /opt/KDMC00101/poller.yaml

AExplanation:
Solution:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
selector:
matchLabels:
run: my-nginx
replicas: 2
template:
metadata:
labels:
run: my-nginx
spec:
containers:
- name: my-nginx
image: nginx
ports:
- containerPort: 90
This makes it accessible from any node in your cluster. Check the nodes the Pod is running on:
kubectl apply -f ./run-my-nginx.yaml
kubectl get pods -l run=my-nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE
my-nginx-3800858182-jr4a2 1/1 Running 0 13s 10.244.3.4 kubernetes-minion-905m
my-nginx-3800858182-kna2y 1/1 Running 0 13s 10.244.2.5 kubernetes-minion-ljyd
Check your pods' IPs:
kubectl get pods -l run=my-nginx -o yaml | grep podIP
podIP: 10.244.3.4
podIP: 10.244.2.5

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Question: 4

Refer to Exhibit:

q4_CKAD

Context

You have been tasked with scaling an existing deployment for availability, and creating a service to expose the deployment within your infrastructure.

Task

Start with the deployment named kdsn00101-deployment which has already been deployed to the namespace kdsn00101 . Edit it to:

* Add the func=webFrontEnd key/value label to the pod template metadata to identify the pod for the service definition

* Have 4 replicas

Next, create ana deploy in namespace kdsn00l01 a service that accomplishes the following:

* Exposes the service on TCP port 8080

* is mapped to me pods defined by the specification of kdsn00l01-deployment

* Is of type NodePort

* Has a name of cherry

AExplanation:
Solution: