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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Design and Build | 20% | - Choose and use the right workload resource (Deployment, DaemonSet, CronJob, etc.) - Define, build and modify container images - Utilize persistent and ephemeral volumes - Understand multi-container Pod design patterns (e.g., sidecar, init and others) |
| Topic 2: Application Deployment | 20% | - Kustomize - Use Kubernetes primitives to implement common deployment strategies (e.g., blue/green or canary) - Understand Deployments and how to perform rolling updates - Use the Helm package manager to deploy existing packages |
| Topic 3: Application Environment, Configuration and Security | 25% | - ConfigMaps and Secrets - SecurityContexts - ServiceAccounts - Discover and use resources that extend Kubernetes (CRD, Operators) - Understand authentication, authorization and admission control - Understanding and defining resource requirements, limits and quotas |
| Topic 4: Services and Networking | 20% | - Provide and troubleshoot access to applications via services - Demonstrate basic understanding of NetworkPolicies - Use Ingress rules to expose applications |
| Topic 5: Application Observability and Maintenance | 15% | - Debugging in Kubernetes - Use built-in CLI tools to monitor Kubernetes applications - Understand API deprecation policies - Utilize container logs - Implement probes and health checks |
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NEW QUESTION # 164
Refer to Exhibit.
Context
You are asked to prepare a Canary deployment for testing a new application release.
Task:
A Service named krill-Service in the goshark namespace points to 5 pod created by the Deployment named current-krill-deployment
1) Create an identical Deployment named canary-kill-deployment, in the same namespace.
2) Modify the Deployment so that:
-A maximum number of 10 pods run in the goshawk namespace.
-40% of the krill-service 's traffic goes to the canary-krill-deployment pod(s)
Answer:
Explanation:
Solution:
NEW QUESTION # 165
You have a microservice application that consists of two components: a web server (using Nginx) and a database (using PostgreSQL). The web server needs to access the database through a local connection, but due to network security restrictions, the web server cannot connect to the database directly. Describe how you can utilize a sidecar container to resolve this issue and ensure the database connection is secure.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Sidecar Container:
- Define a new container in your Deployment's 'spec-template-spec-containers' array, alongside the existing Nginx container. This new container will house the necessary tools for facilitating a secure database connection.
- Name this container appropriately, for example, 'database-proxy'
- Choose an image that contains the required software for database connection, such as 'postgres' or 'postgresqr
- Use a sidecar pattern in the Deployment YAML file. You can specify the sidecar in the container array in the Pod specification:
2. Database Connection Configuration: - Configure the sidecar container to connect to the database. - Establish a connection using the database user credentials and connection string. - If you use a secure connection, ensure that the certificates and private keys are accessible to the sidecar container. 3. Communication Between Containers: - Configure your web server container to communicate with the sidecar container. - Use environment variables to specify the hostname and port of the sidecar container, enabling the web server to connect to the database proxy within the pod. 4. Volume Sharing: - Optionally, share a volume between the web server and the sidecar container to facilitate shared data access, such as database configuration files. 5. Deploy the Deployment: - Apply the updated Deployment YAML file to your Kubernetes cluster using 'kubectl apply -f my-app.yaml' 6. Test the Application: - Access your web server application and confirm that it successfully connects to the database through the sidecar container.
NEW QUESTION # 166 
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:
See the solution below.
Explanation
Solution:
NEW QUESTION # 167
Refer to Exhibit.
Set Configuration Context:
[student@node-1] $ | kubectl
Config use-context k8s
Context
A user has reported an aopticauon is unteachable due to a failing livenessProbe .
Task
Perform the following tasks:
* Find the broken pod and store its name and namespace to /opt/KDOB00401/broken.txt in the format:
<namespace>/<pod>
The output file has already been created
* Store the associated error events to a file /opt/KDOB00401/error.txt, The output file has already been created. You will need to use the -o wide output specifier with your command
* Fix the issue.
Answer:
Explanation:
To find the broken pod and store its name and namespace to /opt/KDOB00401/broken.txt, you can use the kubectl get pods command and filter the output by the status of the pod.
kubectl get pods --field-selector=status.phase=Failed -o jsonpath='{.items[*].metadata.namespace}/{.items[*].metadata.name}' > /opt/KDOB00401/broken.txt This command will list all pods with a status of Failed and output their names and namespaces in the format <namespace>/<pod>. The output is then written to the /opt/KDOB00401/broken.txt file.
To store the associated error events to a file /opt/KDOB00401/error.txt, you can use the kubectl describe command to retrieve detailed information about the pod, and the grep command to filter the output for error events.
kubectl describe pods <pod-name> --namespace <pod-namespace> | grep -i error -B5 -A5 > /opt/KDOB00401/error.txt Replace <pod-name> and <pod-namespace> with the name and namespace of the broken pod you found in the previous step.
This command will output detailed information about the pod, including error events. The grep command filters the output for lines containing "error" and also prints 5 lines before and after the match.
To fix the issue, you need to analyze the error events and find the root cause of the issue.
It could be that the application inside the pod is not running, the container image is not available, the pod has not enough resources, or the liveness probe configuration is incorrect.
Once you have identified the cause, you can take appropriate action, such as restarting the application, updating the container image, increasing the resources, or modifying the liveness probe configuration.
After fixing the issue, you can use the kubectl get pods command to check the status of the pod and ensure
NEW QUESTION # 168 
Context
You are asked to prepare a Canary deployment for testing a new application release.
Task:
A Service named krill-Service in the goshark namespace points to 5 pod created by the Deployment named current-krill-deployment
1) Create an identical Deployment named canary-kill-deployment, in the same namespace.
2) Modify the Deployment so that:
-A maximum number of 10 pods run in the goshawk namespace.
-40% of the krill-service 's traffic goes to the canary-krill-deployment pod(s)
Answer:
Explanation:
See the solution below.
Explanation:
Solution:
NEW QUESTION # 169
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