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| Section | Weight | Objectives |
|---|---|---|
| Application Design and Build | 20% | - Utilize persistent and ephemeral volumes - Understand multi-container Pod design patterns - Choose and use appropriate workload resources - Define, build and modify container images |
| Services and Networking | 20% | - Troubleshoot network access - Expose applications via Services - Use Ingress rules - Understand and apply NetworkPolicies |
| Application Environment, Configuration and Security | 25% | - Work with ConfigMaps - Use custom resources and extensions - Configure resource requirements, limits and quotas - Create and consume Secrets - Apply application security settings - Understand authentication, authorization and admission control - Use ServiceAccounts |
| Application Observability and Maintenance | 15% | - Work with container logs - Implement probes and health checks - Debug applications in Kubernetes - Understand API deprecations - Monitor applications using CLI tools |
| Application Deployment | 20% | - Manage Deployments, rolling updates and rollbacks - Implement deployment strategies - Use Helm package manager - Work with Kustomize |
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NEW QUESTION # 204
Context
Task
A Deployment named backend-deployment in namespace staging runs a web application on port 8081.
Answer:
Explanation:
Solution:
NEW QUESTION # 205
You are running a multi-container application on Kubernetes, and you need to update the image of a specific container within the pod without affecting the other containers. You are using a Deployment resource to manage the pods. How can you achieve this update using imperative commands?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Identify the Pod:
- Use 'kubectl get pods -l to list the pods managed by your deployment. Replace
- Identify the pod that needs the container image update.
2. Identify the Container:
- Use ' kubectl describe pod to display the pod's details, including its containers.
- Note the name of the container you want to update.
3. Update the Container Image:
with the label you've defined for your deployment.
- Use 'kubectl exec -it -container bash' to create an interactive shell within the specified container.
- Inside the shell, update the image for the container using 'docker pull ' (Replace with the new container image you want to use).
- Exit the shell using 'exit
4. Restart the Container:
- Use 'kubectl exec -it -container bash' to access the container again.
- Run 'docker restan to restart the container with the new image.
- Exit the shell using 'exit'.
5. Verify the Image Update:
- Run 'kubectl describe pod to check the updated pod details. Verify that the container image iS now the new one you pulled.
Note: This approach updates the container image in the existing pod. If you want to apply the update to all pods managed by the Deployment, you'll need to update the Deployment configuration itself. ,
NEW QUESTION # 206
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh ckad00021
Task
Create a Cronjob named grep that executes a Pod running the following single container:
name: busybox
image: busybox:stable
command: ["grep", "-i", "nameserv
er", "/etc/resolv.conf"]
Configure the CronJob to:
* execute Once every 30 minutes
* keep 96 completed Job
* keep 192 failed Job
* never restart podsterminate pods after 8 seconds
Manually create and execute once job
named grep-test from the grep Cronjob
Answer:
Explanation:
See the Explanation below for complete solution.
Explanation:
ssh ckad00021
Below is the clean, CKAD-friendly way (YAML + apply + verify + manual job).
1) Create the CronJob grep
Create a file (anywhere, e.g. in your home):
cat <<'EOF' > grep-cronjob.yaml
apiVersion: batch/v1
kind: CronJob
metadata:
name: grep
spec:
schedule: "*/30 * * * *"
successfulJobsHistoryLimit: 96
failedJobsHistoryLimit: 192
jobTemplate:
spec:
activeDeadlineSeconds: 8
template:
spec:
restartPolicy: Never
containers:
- name: busybox
image: busybox:stable
command: ["grep", "-i", "nameserver", "/etc/resolv.conf"]
EOF
Apply it:
kubectl apply -f grep-cronjob.yaml
Verify:
kubectl get cronjob grep
kubectl describe cronjob grep
Confirm the key fields quickly:
kubectl get cronjob grep -o jsonpath='{.spec.schedule}{"\n"}{.spec.successfulJobsHistoryLimit}{"\n"}{.spec.
failedJobsHistoryLimit}{"\n"}'
kubectl get cronjob grep -o jsonpath='{.spec.jobTemplate.spec.activeDeadlineSeconds}{"\n"}{.spec.
jobTemplate.spec.template.spec.restartPolicy}{"\n"}'
2) Manually create and execute the one-off Job grep-test from the CronJob Create the Job from the CronJob:
kubectl create job --from=cronjob/grep grep-test
Watch it:
kubectl get jobs grep-test
kubectl get pods -l job-name=grep-test
Get logs (most important proof):
POD=$(kubectl get pods -l job-name=grep-test -o jsonpath='{.items[0].metadata.name}') kubectl logs "$POD" You should see one or more nameserver ... lines from /etc/resolv.conf.
NEW QUESTION # 207 
Context
It is always useful to look at the resources your applications are consuming in a cluster.
Task
* From the pods running in namespace cpu-stress , write the name only of the pod that is consuming the most CPU to file /opt/KDOBG030l/pod.txt, which has already been created.
Answer:
Explanation:
See the solution below.
Explanation
Solution:
NEW QUESTION # 208
You are running a web application with multiple services exposed via Kubernetes Ingress. The application has two distinct environments: 'staging' and 'production' , each with its own set of services and domain names. You need to configure Ingress rules to route traffic to the appropriate services based on the requested hostname and environment. For example, requests to 'staging.example.com' should be directed to the staging environment, while requests to 'example.com' should go to the production environment. Implement this configuration using Ingress rules.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Service for Each Environment:
- Define services for both 'staging' and 'production' environments, ensuring that the services for each environment are named appropriately. For example, 'staging-service' and .
2. Create an Ingress Resource: - Define an Ingress resource that maps the hostnames to the corresponding services.
3. Apply the Configuration: - Apply the service and ingress definitions using 'kubectl apply -f services.yaml' and 'kubectl apply -f ingress.yaml' respectively. 4. Test the Configuration: - Access 'staging.example.com' and 'example.com' in your browser to ensure that the traffic is directed to the correct services and environments. ,
NEW QUESTION # 209
......
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