[cka] Mock exam-1

1.Deploy a pod named nginx-pod using the nginx:alpine image.

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• Name: nginx-pod

• Image: nginx:alpine

방법1)
k run nginx-pod --image=nginx:alpine

방법2)
k run nginx-pod --image=nginx:alpine --dry-run=client -o yaml > nginx-pod.yaml
k apply -f nginx-pod.yaml

k get pod

 

2.Deploy a messaging pod using the redis:alpine image with the labels set to tier=msg.

• Pod Name: messaging

• Image: redis:alpine

Labels: tier=msg

방법1)
k run messaging --image=redis:alpine --labels=tier=msg

방법2)
k run messaging --image=redis:alpine --dry-run=client -o yaml > messaging.yaml

vi messaging.yaml

k apply -f messaging.yaml
k get po

3.Create a namespace named apx-x9984574.

• Namespace: apx-x9984574

k create ns apx-x9984574
k get ns apx-x9984574

4.Get the list of nodes in JSON format and store it in a file at /opt/outputs/nodes-z3444kd9.json.

• Task completed

k get nodes -o json > /opt/outputs/nodes-z3444kd9.json

cat /opt/outputs/nodes-z3444kd9.json

5.Create a service messaging-service to expose the messaging application within the cluster on port 6379.

Use imperative commands.

• Service: messaging-service

• Port: 6379

• Type: ClusterIp

• Use the right labels

kubectl expose pod messaging clusterip --name=messaging-service --port=6379 --dry-run=client -o yaml > messaging-service.yaml

k apply -f messaging-service
k get svc

6.Create a deployment named hr-web-app using the image kodekloud/webapp-color with 2 replicas.

• Name: hr-web-app

• Image: kodekloud/webapp-color

• Replicas: 2

k create deployment hr-web-app --image=kodekloud/webapp-color --replicas=2 --dry-run=client -o yaml > hr-web-app.yaml

k apply -f hr-web-app.yaml

7. Create a static pod named static-busybox on the controlplane node that uses the busybox image and the command sleep 1000.

• Name: static-busybox

• Image: busybox

방법1)
k run static-busybox --image=busybox --dry-run=client -o yaml > static-busybox.yaml

vi static-busybox.yaml    ----- command추가
k apply -f static-busybox.yaml

방법2)
k run static-busybox --image=busybox --command -- sleep 1000

 

8.Create a POD in the finance namespace named temp-bus with the image redis:alpine.

• Name: temp-bus

• Image Name: redis:alpine

k create ns temp-bus

k run finance temp-bus -n finance --image=redis:alpine --dry-run=client -o yaml > finance.yaml
k apply -f finance.yaml

9.A new application orange is deployed. There is something wrong with it. Identify and fix the issue.

• Issue fixed

방법1)
k get po orange -o yaml > oragne.yaml

vi orange.yaml

sleeeep -> sleep 

방법1)
k edit pod orange
k replace --force -f [경로/이름]

10.Expose the hr-web-app as service hr-web-app-service application on port 30082 on the nodes on the cluster.

The web application listens on port 8080.

• Name: hr-web-app-service

• Type: NodePort

• Endpoints: 2

• Port: 8080

• NodePort: 30082

kubectl expose deployment hr-web-app --name=hr-web-app-service --port=8080 --type=NodePort --dry-run=client -o yaml > hr-web-app-service.yaml

vi hr-web-app-service.yaml
k apply -f hr-web-app-service.yaml

11.Use JSON PATH query to retrieve the osImages of all the nodes and store it in a file /opt/outputs/nodes_os_x43kj56.txt.

The osImages are under the nodeInfo section under status of each node.

• Task Completed

k get nodes -o jsonpath='{.items[*].status.nodeInfo.osImage}' > /opt/outputs/nodes_os_x43kj56.txt

cat /opt/outputs/nodes_os_x43kj56.txt

 

12.Create a Persistent Volume with the given specification.

• Volume Name: pv-analytics

• Storage: 100Mi

• Access modes: ReadWriteMany

• Host Path: /pv/data-analytics

vi pv-analytics.yaml
k apply -f pv-analytics.yaml