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Linux Foundation Certified Kubernetes Application Developer (CKAD) certification is a program that validates the skills of an individual in designing, building, configuring, and exposing cloud-native applications on Kubernetes. Kubernetes is an open-source container orchestration system that automates the deployment, scaling, and management of containerized applications.
Linux Foundation Certified Kubernetes Application Developer (CKAD) exam is a certification program for developers who want to demonstrate their proficiency and expertise in Kubernetes application development. Linux Foundation Certified Kubernetes Application Developer Exam certification is intended for developers who are already familiar with the basics of Kubernetes and want to demonstrate their skills and knowledge in the field.
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NEW QUESTION # 62 
Context
You have been tasked with scaling an existing deployment for availability, and creating a service to expose the deployment within your infrastructure.
Task
Start with the deployment named kdsn00101-deployment which has already been deployed to the namespace kdsn00101 . Edit it to:
* Add the func=webFrontEnd key/value label to the pod template metadata to identify the pod for the service definition
* Have 4 replicas
Next, create ana deploy in namespace kdsn00l01 a service that accomplishes the following:
* Exposes the service on TCP port 8080
* is mapped to me pods defined by the specification of kdsn00l01-deployment
* Is of type NodePort
* Has a name of cherry
Answer:
Explanation:
See the solution below.
Explanation
Solution:
NEW QUESTION # 63 
Context
A container within the poller pod is hard-coded to connect the nginxsvc service on port 90 . As this port changes to 5050 an additional container needs to be added to the poller pod which adapts the container to connect to this new port. This should be realized as an ambassador container within the pod.
Task
* Update the nginxsvc service to serve on port 5050.
* Add an HAproxy container named haproxy bound to port 90 to the poller pod and deploy the enhanced pod.
Use the image haproxy and inject the configuration located at /opt/KDMC00101/haproxy.cfg, with a ConfigMap named haproxy-config, mounted into the container so that haproxy.cfg is available at
/usr/local/etc/haproxy/haproxy.cfg. Ensure that you update the args of the poller container to connect to localhost instead of nginxsvc so that the connection is correctly proxied to the new service endpoint. You must not modify the port of the endpoint in poller's args . The spec file used to create the initial poller pod is available in /opt/KDMC00101/poller.yaml See the solution below.
Answer:
Explanation:
Explanation
Solution:
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
selector:
matchLabels:
run: my-nginx
replicas: 2
template:
metadata:
labels:
run: my-nginx
spec:
containers:
- name: my-nginx
image: nginx
ports:
- containerPort: 90
This makes it accessible from any node in your cluster. Check the nodes the Pod is running on:
kubectl apply -f ./run-my-nginx.yaml
kubectl get pods -l run=my-nginx -o wide
NAME READY STATUS RESTARTS AGE IP NODE
my-nginx-3800858182-jr4a2 1/1 Running 0 13s 10.244.3.4 kubernetes-minion-905m my-nginx-3800858182-kna2y 1/1 Running 0 13s 10.244.2.5 kubernetes-minion-ljyd Check your pods' IPs:
kubectl get pods -l run=my-nginx -o yaml | grep podIP
podIP: 10.244.3.4
podIP: 10.244.2.5
NEW QUESTION # 64
Refer to Exhibit.
Task:
A pod within the Deployment named buffale-deployment and in namespace gorilla is logging errors.
1) Look at the logs identify errors messages.
Find errors, including User "system:serviceaccount:gorilla:default" cannot list resource "deployment" [...] in the namespace "gorilla"
2) Update the Deployment buffalo-deployment to resolve the errors in the logs of the Pod.
The buffalo-deployment 'S manifest can be found at -/prompt/escargot/buffalo-deployment.yaml
Answer:
Explanation:
Solution:
NEW QUESTION # 65
You have a Node.js application that runs in a Kubernetes cluster. The application requires access to a MySQL database hosted externally on a different server. Due to security concerns, you cannot directly expose the database to the application pod. Describe how you can implement a network policy to enable secure communication between the application pod and the MySQL database.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Network Policy:
- Create a Network Policy that allows traffic only from the application pods to the MySQL database server-
- Define the podSelector' to specify the application pods that should be allowed to connect to the database.
- Use 'ingress' rules to define the allowed incoming traffic from the application pods.
- Specify the 'from' field to identify the source pods using labels or namespaces-
- Set the 'to' field to specify the target IP address or range of the MySQL database server
2. Deploy the Network Policy: - Apply the Network Policy to your Kubernetes cluster using 'kubectl apply -f mysql-access.yamr 3. Configure the Application: - Configure your Node.js application to connect to the MySQL database using the IP address or hostname of the database server. - Ensure that the Node.js application has appropriate security credentials to access the database. 4. Test the Application: - Run your application and verify that it can connect to the MySQL database successfully. Note: This example provides a basic implementation. You might need to adjust the configuration based on your specific security requirements and network setup. You can further enhance the network policy by using specific ports, protocols, and other security measures as needed.,
NEW QUESTION # 66
You are running a web application with two replicas. You need to ensure that there is always at least one replica available while updating the application. You also need to have a maximum of two replicas during the update. How would you configure a rolling update strategy for your Deployment?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Llpdate the Deployment YAMLI
- Define 'strategy.type' to 'Rollingupdate' to trigger a rolling update when the deployment is updated.
- Update the 'replicas' to 2 to start with.
- Set 'maxi-Jnavailable' to to ensure at least one pod remains running during the update.
- Set 'maxSurge' to to allow for a maximum of two replicas during the update.
2. Create or Llpdate the Deployment - Apply the updated YAML file using 'kubectl apply -f my-app-deploymentyamr - If the deployment already exists, Kubernetes will update it with the new configuration- 3. Trigger the Update: - Update the image of your application to a newer version. - You can trigger the update by pushing a new image to your container registry. 4. Monitor the Update: - Use 'kubectl get pods -l app=my-apps to monitor the pod updates during the rolling update process. - Observe the pods being updated one at a time, ensuring that there's always at least one replica available. 5. Check for Successful Update: - Once the update is complete, use 'kubectl describe deployment my-app' to verify that the 'updatedReplicas' field matches the 'replicas field.
NEW QUESTION # 67
......
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