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| Section | Objectives |
|---|---|
| State Persistence | - Storage classes and volume mounting - PersistentVolumes and PersistentVolumeClaims |
| Application Environment, Configuration and Security | - Security contexts and service accounts - ConfigMaps and Secrets usage |
| Application Deployment | - Use Kubernetes primitives to implement deployments - Understand rolling updates and rollbacks |
| Services and Networking | - Services (ClusterIP, NodePort) - Ingress basics - Pod networking concepts |
| Application Observability and Maintenance | - Understand probes and health checks - Monitor and troubleshoot applications |
| Application Design and Build | - Understand Jobs and CronJobs - Define, build and modify container images - Understand multi-container Pod design patterns |
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NEW QUESTION # 228
You have a Kubernetes application that uses a Deployment named sweb-app' to deploy multiple replicas of a web server pod. This web server application needs to be accessible through a public IP address. You are tasked with implementing a service that allows users to access the application from outside the cluster. However, the service should exposed via a specific port number (8080), regardless ot the port that the web server listens on inside the pods.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Service YAMI-:
- Define the service type as 'LoadBalancer' to expose it via a public IP
- Set the 'targetPort' to the port that the web server listens on inside the pods (let's assume it's 8080)-
- Set the 'port' to 8080, which will be the port used to access the service from outside the cluster.
2. Apply the Service: - Use 'kubectl apply -f web-app-service.yaml' to create the service- 3. Get the External IP: - Once the service iS created, use 'kubectl get services web-app-services to get the external IP address. This will be assigned by the cloud provider and will be available for users to access the application. 4. Test the Service: - Access the application using the external IP address and port 8080. For example, if the external IP is '123.45.67.89' , you would access the application through 'http://123.45.67.89:8080' ,
NEW QUESTION # 229
Refer to Exhibit.
Task:
1) Fix any API depreciation issues in the manifest file -/credible-mite/www.yaml so that this application can be deployed on cluster K8s.
2) Deploy the application specified in the updated manifest file -/credible-mite/www.yaml in namespace cobra
Answer:
Explanation:
Solution:
NEW QUESTION # 230
You nave a multi-container pod tnat uses a database container and an application container. The database container is responsible for storing sensitive datm You need to ensure that the database container only runs on nodes that have a specific label, like 'sensitive-data=true', for added security. How would you implement this constraint using Pod Affinity and node selectors?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Node Labels:
- First, you need to label your nodes appropriately. I-Jse ' kubectl label nodes sensitive-data=true' for nodes that should host the database container
2. Create Pod Affinity Rules:
- In your pod definition, add a 'nodeselector' to enforce the requirement.
3. Apply the Pod Definition: - Apply the updated pod definition using 'kubectl apply -f my-app-yaml' 4. Verification: - Check the pod status using 'kubectl get pods my-app'. Ensure the pod is scheduled on a node with the 'sensitive-data-true label. 5. Further Security: - You can additionally use 'podAffinity' to ensure that the database container and the application container run on different nodes. This adds an extra layer of security in case one node is compromised.
- In this example, 'podAntiAtfinitys Witn 'requiredDuringScnedulinglgnoredDunngExecution' ensures tnat tne database container and tne application container are not scheduled on the same node, thus preventing potential data breaches. ,
NEW QUESTION # 231
You need to configure a Kubernetes deployment to use a secret stored in a different namespace. How can you access the secret in a different namespace, and how can you mount it as a file in your deployment's container?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
I). Ensure Access to the Secret:
- The service account used by your deployment needs to have read access to the secret in the other namespace. This can be done using a Role and RoleBinding. If the service account already has access, skip to step 2.
- Create a role in the secret's namespace:
- Create a RoleBinding in the secret's namespace:
- Apply the Role and RoleBinding using: bash kubectl apply -f role-yaml kubectl apply -f rolebinding.yaml 2. Modify your Deployment - Update your Deployment YAML file to mount the secret as a file, specifying the namespace:
- Replace 'my-secret with the actual name of the secret and 'secret-namespace with the namespace where the secret is stored. 3. Apply the Updated Deployment: - Apply the updated deployment using: bash kubectl apply -f my-deployment.yaml 4. Access Secret Data: - The secret's data is now mounted in the container at the specified 'mountPatm. You can access the secret's data using the mounted file.]
NEW QUESTION # 232
You have a Deployment named 'wordpress-deployment' that runs 3 replicas of a Wordpress container with the image 'wordpress:latest You need to ensure that wnen a new image is pusned to the Docker Hub repository 'my-wordpress-repo/wordpressaatest' , tne Deployment automatically updates to use the new image. Additionally, you need to set up a rolling update strategy where only one pod is updated at a time- The maximum number of unavailable pods at any given time should be 1.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML.
- Add 'imagePuIIPoIicy: Always' to the container definition to ensure the deployment pulls the latest image from the Docker Hub repository even if a local copy exists.
- Set 'strategy-type: Rollingupdate' to enable a rolling update strategy.
- Configure 'strategy.rollingupdate.maxonavailable: I ' to allow only one pod to be unavailable during the update process.
- Set 'strategy-rollingUpdate.maxSurge: O' to restrict the number of pods added during the update to zero.
NEW QUESTION # 233
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