Free Access LinuxFoundation.CKA.v2023-05-15.q64 Practice Test (Page 6)

Question 21

Create a Kubernetes secret asfollows:
* Name: super-secret
* password: bob
Create a pod namedpod-secrets-via-file Image, which mounts a secret namedsuper-secretat
/secrets.
Create a second pod namedpod-secrets-via-env Image, which exportspasswordas CONFIDENTIAL

Question 22

Watch the job that runs 10 times one by one and verify 10 pods are created and delete those after it's completed

Question 23

List pod logs named "frontend" and search for the pattern "started" and write it to a file "/opt/error-logs"

Question 24

Allow traffic from all the pods in "web" namespace and from pods
with label "type=monitoring" to the pods matching label "app: db"

A.kubectl create namespace web
kubectl label namespace/web app=web
vim web-allow-all-ns-monitoring.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: web-allow-all-ns-monitoring
namespace: default
spec:
podSelector:
matchLabels:
app: db
ingress:
- from:
- namespaceSelector:
matchLabels:
app: web
podSelector:
matchLabels:
type: monitoring
k kubectl apply -f web-allow-all-ns-monitoring.yaml

B.kubectl create namespace web
kubectl label namespace/web app=web
vim web-allow-all-ns-monitoring.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: web-allow-all-ns-monitoring
namespace: default
spec:
podSelector:
podSelector:
matchLabels:
type: monitoring
k kubectl apply -f web-allow-all-ns-monitoring.yaml

Question 25

Create a deployment named "myapp" that having 2 replicas with
nginx image and expose deployment as service named "myservice"

A.// Create a YAML Template
kubectl create deploy myapp --image=nginx --dry-run -o yaml >
myapp.yaml
//Update replicas=2 in myapp.yaml file
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: myapp
name: myapp
spec:
replicas: 2
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- image: nginx
name: nginx
// Create deployment
kubectl create -f myapp.yaml
// Creating YAML template for service
kubectl expose deployment myapp --type=ClusterIP --port=80 --
target-port=80 --name=myservice --dry-run -o yaml >
myservice.yaml
YAML File:
apiVersion: v1
kind: Service
metadata:
labels:
app: myapp
name: myservice
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: myapp
type: ClusterIP
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S)
AGE
kubernetes ClusterIP 10.2.0.1 <none> 443/TCP
158d
myservice ClusterIP 10.2.96.175 <none> 80/TCP
40s

B.// Create a YAML Template
kubectl create deploy myapp --image=nginx --dry-run -o yaml >
myapp.yaml
//Update replicas=2 in myapp.yaml file
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: myapp
name: myapp
spec:
replicas: 2
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- image: nginx
name: nginx
// Create deployment
kubectl create -f myapp.yaml
// Creating YAML template for service
kubectl expose deployment myapp --type=ClusterIP --port=60 --
target-port=60 --name=myservice --dry-run -o yaml >
myservice.yaml
YAML File:
apiVersion: v1
kind: Service
metadata:
labels:
app: myapp
name: myservice
spec:
ports:
- port: 60
protocol: TCP
targetPort: 80
selector:
app: myapp
type: ClusterIP
kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S)
AGE
kubernetes ClusterIP 10.2.0.1 <none> 443/TCP
158d
myservice ClusterIP 10.2.96.175 <none> 80/TCP
40s

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Question 21

Question 22

Question 23

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Question 25

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