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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Application Developer (CKAD) Exam |
| Exam Number: | CKAD |
| Exam Price: | USD 445 |
| Exam Duration: | 120 minutes |
| Passing Score: | 66% |
| Available Languages: | English |
| Exam Format: | Performance-based, Command-line |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 15-20 (performance-based tasks) |
| Related Certifications: | Certified Kubernetes Application Developer (CKAD) |
| Sample Questions: | Linux Foundation CKAD Sample Questions |
| Exam Way: | Online, proctored exam via PSI Secure Browser (performance-based in a command-line environment). |
| Pre Condition: | No mandatory prerequisites, but working knowledge of container runtimes and microservice architecture is recommended. |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-application-developer-ckad/ |
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The CKAD Certification is highly valued in the industry and is recognized as a benchmark for Kubernetes application development skills. It is designed to help developers demonstrate their expertise in the field and gain recognition for their skills and knowledge. Linux Foundation Certified Kubernetes Application Developer Exam certification is also useful for employers who are looking to hire skilled Kubernetes developers and want to ensure that their candidates have the necessary skills and knowledge to perform the job.
NEW QUESTION # 201
You have a Deployment named 'my-app-deployment' that runs 3 replicas of an application container. The application container requires access to a ConfigMap named 'my-app-config' . You want to configure your Deployment to use Kustomize to automatically update the ConfigMap's data within the containers whenever the ConfigMap is updated. You also need to configure a rolling update strategy for the Deployment that allows for a maximum of one pod to be unavailable during the update process.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap with the necessary data:
Apply tne ConfigMap using 'kubectl apply -f my-app-config.yaml' 2. Create a Kustomization file for your Deployment:
This file defines the resources that Kustomize will manage and the patch file to apply 3. Create a patch file to reference the ConfigMap:
This patch adds a 'envFrom' section to the container, referencing the 'my-app-config' ConfigMap. 4. Create your Deployment YAML file:
5. Apply the Kustomize configuration: - Navigate to the directory containing your Kustomization file. - Run the command 'kustomize build' to build the Kustomize resources. - Apply the built resources using 'kubectl apply -f kustomization_yaml' 6. Update the ConfigMap: Modify the data within the 'my-app-config' ContigMap. You can either edit the YAML file directly or use 'kubectl patch' to update specific values. 7. Verify the update: - Observe the logs of your 'my-apps containers to confirm that the environment variable has been updated with the new ConfigMap data. - Use 'kubectl get pods -l app=my-app' to monitor the rolling update process. You should see one pod at a time being updated with the new ConfigMap data. Note: The rolling update strategy ensures that only one pod is unavailable at a time during the update process, minimizing downtime. Kustomize ensures that the ConfigMap changes are automatically applied to the Deployment, keeping your application up-to-date.]
NEW QUESTION # 202
You are running a microservices application on Kubernetes, and you need to restrict the communication between your services to specific ports. For example, your 'frontend' service should only be allowed to communicate with the 'backend' service on port 8080. How would you configure this using NetworkPolicy in Kubernetes?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the NetworkPolicy:
- Create a new YAML file (e.g., 'frontend-network-policy.yaml') to define the network policy.
- Specify the name of the NetworkPolicy and the namespace where it will be applied.
- Include the following elements within the 'spec' section:
- 'podSelector' to target the 'frontend' pods.
- 'ingress' section to define inbound traffic rules.
- 'egress' section to define outbound traffic rules.
2. Apply the NetworkPolicy: - Apply the NetworkPolicy to your cluster using the following command: bash kubectl apply -f frontend-network-policy.yaml 3. Verify the NetworkPolicy: - Use the 'kubectl get networkpolicy' command to list the applied NetworkPolicies and confirm the status. 4. Test the Restrictions: - From a 'frontend' pod, attempt to connect to the 'backend' service on port 8080. - Attempt to connect to other services or ports on the backend or external networks. - Verify that the communication restrictions defined in the NetworkPolicy are working as expected.
NEW QUESTION # 203 
Given a container that writes a log file in format A and a container that converts log files from format A to format B, create a deployment that runs both containers such that the log files from the first container are converted by the second container, emitting logs in format B.
Task:
* Create a deployment named deployment-xyz in the default namespace, that:
*Includes a primary
lfccncf/busybox:1 container, named logger-dev
*includes a sidecar Ifccncf/fluentd:v0.12 container, named adapter-zen
*Mounts a shared volume /tmp/log on both containers, which does not persist when the pod is deleted
*Instructs the logger-dev
container to run the command
which should output logs to /tmp/log/input.log in plain text format, with example values:
* The adapter-zen sidecar container should read /tmp/log/input.log and output the data to /tmp/log/output.* in Fluentd JSON format. Note that no knowledge of Fluentd is required to complete this task: all you will need to achieve this is to create the ConfigMap from the spec file provided at /opt/KDMC00102/fluentd-configma p.yaml , and mount that ConfigMap to /fluentd/etc in the adapter-zen sidecar container See the solution below.
Answer:
Explanation:
Solution:
NEW QUESTION # 204
You have a Deployment named 'mysql-deployment running a MySQL database container. The 'mysql-deployment' has 2 replicas and you want to implement a blue-green deployment strategy for updating the database. The following steps need to be implemented:
- Create a new Deployment called 'mysql-deployment-new' with the updated MySQL image.
- Ensure that both deployments (old and new) are running concurrently.
- Route traffic to the 'mysql-deployment-new' deployment.
- Remove the old deployment ('mysql-deployment) once the traffic is switched over.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a new Deployment with updated image:
- Create a new Deployment named 'mysql-deployment-new' with the updated MySQL image. You can either create a new YAML tile or use 'kubectl create deployment' command.
- Ensure that the new deployment has the same number ot replicas as the old deployment.
2. Apply the new Deployment: - Apply the new Deployment YAML using 'kubectl apply -f mysql-deployment-new.yamr 3. Check Deployment status: - IJse ' kubectl get deployments' to verity that both deployments are running. You should see both 'mysql-deployment' and 'mysql-deployment-new' . 4. Update Service to use the new deployment: - Update the Service that is associated with the MySQL database to point to the new Deployment
- Apply the updated Service YAML using 'kubectl apply -f mysql-service-yamr 5. Verify traffic routing: - Test the application or services that rely on the MySQL database to ensure that the traffic is now being routed to the 'mysql-deployment-new' 6. Delete old Deployment: - Once you have verified that the traffic is successfully routed to the new Deployment, you can delete the old Deployment 'mysql-deployment' using 'kubectl delete deployment mysql-deployment'.]
NEW QUESTION # 205 
Task
You have rolled out a new pod to your infrastructure and now you need to allow it to communicate with the web and storage pods but nothing else. Given the running pod kdsn00201 -newpod edit it to use a network policy that will allow it to send and receive traffic only to and from the web and storage pods.
Answer:
Explanation:
See the solution below.
Explanation
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: internal-policy
namespace: default
spec:
podSelector:
matchLabels:
name: internal
policyTypes:
- Egress
- Ingress
ingress:
- {}
egress:
- to:
- podSelector:
matchLabels:
name: mysql
ports:
- protocol: TCP
port: 3306
- to:
- podSelector:
matchLabels:
name: payroll
ports:
- protocol: TCP
port: 8080
- ports:
- port: 53
protocol: UDP
- port: 53
protocol: TCP
NEW QUESTION # 206
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