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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Design and Build | 20% | - Choose and use appropriate workload resources - Understand multi-container Pod design patterns - Define, build and modify container images - Utilize persistent and ephemeral volumes |
| Topic 2: Application Environment, Configuration and Security | 25% | - Apply application security settings - Configure resource requirements, limits and quotas - Understand authentication, authorization and admission control - Use custom resources and extensions - Create and consume Secrets - Work with ConfigMaps - Use ServiceAccounts |
| Topic 3: Application Observability and Maintenance | 15% | - Debug applications in Kubernetes - Understand API deprecations - Implement probes and health checks - Work with container logs - Monitor applications using CLI tools |
| Topic 4: Application Deployment | 20% | - Use Helm package manager - Work with Kustomize - Implement deployment strategies - Manage Deployments, rolling updates and rollbacks |
| Topic 5: Services and Networking | 20% | - Understand and apply NetworkPolicies - Use Ingress rules - Expose applications via Services - Troubleshoot network access |
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NEW QUESTION # 75
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 # 76
You are creating a Deployment for a web application that uses a database for its data persistence. You want to scale the deployment horizontally, but you also want to ensure that each pod has access to the same database instance. Explain how you can use a ConfigMap to provide database connection details to each pod.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap:
- Create a ConfigMap that contains the necessary database connection details.
- This includes parameters like host, port, username, password, and database name.
- Example:
2. Mount the ConfigMap: - In your Deployment's 'spec-template-spec-containers' , mount the ConfigMap as a volume. - Example:
3. Access ConfigMap Values: - Within your application's code, use environment variables to access the values from the mounted ConfigMap. - For example, the environment variable 'DB HOST' would be set to the value "database-service" from the ConfigMap. 4. Deploy and Test: - Apply the ConfigMap and Deployment YAML files. - Test the application to confirm that each pod can connect to the same database using the connection details provided by the ConfigMap. 5. Scale the Deployment: - Scale the Deployment horizontally to increase the number of replicas. - Each new pod will automatically inherit the mounted ConfigMap and have access to the same database connection details.
NEW QUESTION # 77
You're running a MYSQL database pod in a Kubernetes cluster. You need to ensure that the pod is always running on a specific node, regardless of node failures or maintenance events. This node has specific hardware or software requirements that the MySQL database requires. How do you achieve this?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Node Affinity: Define a node affinity rule for your MySQL pod that specifically targets the desired node. You'll use 'nodeselector' or 'nodeAffinity' in your pod definition.
2. Apply the Pod Definition: Apply the YAML configuration to your Kubernetes cluster using ' kubectl apply -f mysql-pod-yamr 3. Verify Pod Placement: Use 'kubectl get pods -l app=mysqr to verify that the pod is running on the intended node (i.e., "your-specific-node-name"). 4. Handle Node Failure: While this ensures the pod starts on the desired node, if that node fails, the pod will not be automatically rescheduled. To address this, consider using: - Node Selectors: You can combine 'nodeselector' with 'nodeAffinity' to prioritize your specific node. This ensures that the pod tries to schedule on your preferred node first- - Taint and Tolerations: You can taint the specific node with a unique key and then add a toleration to your MySQL pod to tolerate that taint. This allows the pod to be scheduled on tnat node and only that node. 5. Deployment for Scalability: It you need to run multiple MySQL pods, you can leverage a Deployment to manage their lifecycle. Ensure the deployment's 'spec-template' incorporates the node affinity rules. This ensures tnat new pods are always scheduled on the designated node. Remember: Carefully consider the implications of hard-binding pods to specific nodes. While it ensures consistency, it also reduces flexibility and can impact your overall cluster health and availability.,
NEW QUESTION # 78
Exhibit:
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: B
NEW QUESTION # 79
Refer to Exhibit.
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:
Solution:
NEW QUESTION # 80
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