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| Section | Objectives |
|---|---|
| Application Observability and Maintenance | - Monitor and troubleshoot applications - Understand probes and health checks |
| Application Design and Build | - Understand Jobs and CronJobs - Define, build and modify container images - Understand multi-container Pod design patterns |
| Application Environment, Configuration and Security | - Security contexts and service accounts - ConfigMaps and Secrets usage |
| State Persistence | - Storage classes and volume mounting - PersistentVolumes and PersistentVolumeClaims |
| Application Deployment | - Use Kubernetes primitives to implement deployments - Understand rolling updates and rollbacks |
| Services and Networking | - Ingress basics - Pod networking concepts - Services (ClusterIP, NodePort) |
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NEW QUESTION # 178
Refer to Exhibit.
Context
Your application's namespace requires a specific service account to be used.
Task
Update the app-a deployment in the production namespace to run as the restrictedservice service account. The service account has already been created.
Answer:
Explanation:
Solution:
NEW QUESTION # 179
You have a Deployment running a web application built With a Node.js container. The application currently uses an older version of the Node.js runtime, and you need to upgrade to a newer versiom Describe the steps involved in modifying the container image to include the new Node.js runtime without rebuilding the entire application.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Dockerfile:
- Create a new 'Dockerfile' With the following content
- Replace With the name of the existing Docker image used by your Deployment. - This Dockefflle uses a multi-stage build approach. It starts with a new Node.js base image and copies the application code from the existing image. This allows you to update the runtime without rebuilding the entire application. 2. Build the New Image: - Build tne image using the Dockerflle: docker build -t updated-image:latest 3. Update the Deployment - Modify your Deployment YAML file to use the newly built image:
4. Apply the Changes: - Apply the updated Deployment using 'kubectl apply -f deployment.yamr. This will trigger a rolling update to the pods using the new image. 5. Verify the Update: - Check the logs of the pods using 'kubectl logs -f ' . You should see the application running with the updated Node.js version. 6. Test the Application: - Access your application and ensure it functions correctly with the new Node.js runtime.
NEW QUESTION # 180 
Task:
1) First update the Deployment cka00017-deployment in the ckad00017 namespace:
Role userUI
2) Next, Create a NodePort Service named cherry in the ckad00017 nmespace exposing the ckad00017-deployment Deployment on TCP port 8888 See the solution below.
Answer:
Explanation:
Explanation
Solution:
Text Description automatically generated
Text Description automatically generated
Text Description automatically generated
NEW QUESTION # 181
You are running a web application that requires high availability and resilience. You have implemented a deployment using a Deployment object in Kubernetes, but you want to ensure that your application can automatically recover from pod failures. Design a strategy using annotations that will enable automatic pod restarts in case of application failures.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define an Annotation: Add an annotation called ' kubernetes-io/restart-policy' to your Deployment's 'spec-template-metadata' section, setting its value to 'Always'.
2. Trigger Application Failures: You can intentionally trigger failures in your pods to test the restart policy You can use 'kubectl exec' to run commands inside a pod and simulate an application failure using 'Pkill -f s. For example, you can run a command like 'Pkill -f web-app' to terminate the web app process. 3. Monitor Pod Restarts: Observe the pods in your deployment using 'kubectl get pods -l app=web-app' . You will see that Kubernetes automatically restarts pods where the application has failed, ensuring your application remains available. 4. Confirm Automatic Restart Verify the 'restartCount of the affected pods using 'kubectl describe pod This will show the number of times the pod has been restarted due to the application failure. 5. Alternative Restart Policies: While 'Always' is the default policy, you can also use other restart policies like 'onFailure' (restarts only it the pod exits due to an error) or 'Never' (doesn't restart tne pod regardless of the reason for failure). Use the ' kubernetes.wrestart-policy' annotation to set these alternative policies as needed for specific applications. ,
NEW QUESTION # 182
Context
You are asked to deploy an application developed for an older version of Kubernetes on a cluster running a recent version of Kubernetes .
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh ckad00026
Task
Fix any API -deprecation issues in the manitest file
/home/candidate/credible-mite/web.yaml
so that the application can be deployed on cluster ckad00026.
The application was developed for Kubernetes v1.15.
The cluster ckad00026 runs Kubernetes 1.29+.
Deploy the application specified in the updated manifest file
/home/candidate/credible-mite/web.yaml in namespace garfish .
Answer:
Explanation:
See the Explanation below for complete solution.
Explanation:
ssh ckad00026
Your job is to edit /home/candidate/credible-mite/web.yaml so it uses APIs supported on Kubernetes 1.29+, then deploy it into namespace garfish.
Because I can't see your file from here, the most reliable exam approach is:
* run a server-side dry-run to reveal the exact deprecated/removed APIs and schema errors
* edit the manifest to the modern API versions/fields
* re-run dry-run until it passes
* apply for real and verify rollout
1) Go to the manifest and run a server-side dry-run
cd /home/candidate/credible-mite
ls -l
sed -n '1,200p' web.yaml
Make sure the namespace exists:
kubectl get ns garfish || kubectl create ns garfish
Now run a server-side dry-run (this catches removed APIs on the cluster):
kubectl apply -n garfish -f web.yaml --dry-run=server
Whatever errors you get here tell you exactly what to fix.
2) Fix the common v1.15 # v1.29 API deprecations
Edit the file:
vi web.yaml
Below are the most common objects from older manifests and how to update them for 1.29+.
A) Deployments / DaemonSets / StatefulSets
Old (v1.15 often used):
* extensions/v1beta1 or apps/v1beta1 or apps/v1beta2
New:
* apiVersion: apps/v1
Also in apps/v1, .spec.selector is required and must match the pod template labels.
Example conversion:
apiVersion: apps/v1
kind: Deployment
metadata:
name: web
spec:
replicas: 2
selector:
matchLabels:
app: web
template:
metadata:
labels:
app: web
spec:
containers:
- name: web
image: nginx
Key rule:
spec.selector.matchLabels must exactly match spec.template.metadata.labels (at least for the keys you select on).
B) Ingress
Old:
* apiVersion: extensions/v1beta1 (or networking.k8s.io/v1beta1)
New:
* apiVersion: networking.k8s.io/v1
Required changes:
* spec.rules.http.paths[].pathType is required (usually Prefix)
* backend format changes from serviceName/servicePort to service.name/service.port.number (or .name for named ports) Old backend:
backend:
serviceName: web
servicePort: 80
New backend:
backend:
service:
name: web
port:
number: 80
Full path example:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: web
spec:
rules:
- host: example.local
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: web
port:
number: 80
C) CronJob
Old:
* apiVersion: batch/v1beta1
New:
* apiVersion: batch/v1
Most fields stay the same; just update apiVersion.
D) PodDisruptionBudget
Old:
* policy/v1beta1
New:
* policy/v1
spec.selector/minAvailable/maxUnavailable remain, but apiVersion changes.
E) RBAC
Usually already:
* rbac.authorization.k8s.io/v1 (this is fine)
F) Removed APIs you must delete/replace
If you see these in a v1.15-era manifest, they are removed in modern clusters:
* PodSecurityPolicy (policy/v1beta1) is removed. You cannot deploy it on 1.29+. Remove it from the manifest (or replace with whatever your environment uses, but for CKAD tasks you usually delete PSP sections from the file).
* Some old admission/alpha resources also removed.
If dry-run complains "no matches for kind ... in version ...", that's your cue.
3) Re-run dry-run until it succeeds
After you edit:
kubectl apply -n garfish -f web.yaml --dry-run=server
Keep iterating until there are no errors.
4) Deploy for real
kubectl apply -n garfish -f /home/candidate/credible-mite/web.yaml
5) Verify everything in namespace garfish
List what was created:
kubectl -n garfish get all
kubectl -n garfish get ingress 2>/dev/null || true
If there is a Deployment, verify rollout:
kubectl -n garfish get deploy
kubectl -n garfish rollout status deploy --all
Check pods/events if something fails:
kubectl -n garfish get pods -o wide
kubectl -n garfish describe pod <pod-name>
kubectl -n garfish get events --sort-by=.lastTimestamp | tail -n 30
NEW QUESTION # 183
......
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