Free Access LinuxFoundation.CKA.v2024-04-21.q67 Practice Test (Page 12)

Question 51

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:
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:
matchLabels:
app: db
ingress:
- from:
- namespaceSelector:
matchLabels:
app: web
podSelector:
matchLabels:
type: monitoring
k kubectl apply -f web-allow-all-ns-monitoring.yaml

Question 52

Check the rollout history and make sure everything is ok after the update

A.kubectl rollout history deploy webapp
kubectl get deploy webapp --show-labels
kubectl get rs -l app=webapp
kubectl get po -l app=webapp

B.kubectl rollout history deploy webapp
kubectl get deploy webapp --show-labels
kubectl get rs -
kubectl get po -l app=webapp

Question 53

Get IP address of the pod - "nginx-dev"

A.Kubect1 get po -o wide
Using JsonPath
kubect1 get pods -o=jsonpath='{range
.items[*]}{.metadata.name}{"\t"}{.status.podIP}{"\n"}{end}'

B.Kubect1 get po -o wide
Using JsonPath
kubect1 get pods
.items[*]}{.metadata.name}{"\t"}{.status.podIP}{"\n"}{end}'

Question 54

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.