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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Services and Networking | 20% | - Expose applications via Services - Troubleshoot network access - Use Ingress rules - Understand and apply NetworkPolicies |
| Topic 2: Application Design and Build | 20% | - Define, build and modify container images - Understand multi-container Pod design patterns - Utilize persistent and ephemeral volumes - Choose and use appropriate workload resources |
| Topic 3: Application Observability and Maintenance | 15% | - Monitor applications using CLI tools - Debug applications in Kubernetes - Understand API deprecations - Implement probes and health checks - Work with container logs |
| Topic 4: Application Environment, Configuration and Security | 25% | - Configure resource requirements, limits and quotas - Use custom resources and extensions - Create and consume Secrets - Apply application security settings - Use ServiceAccounts - Understand authentication, authorization and admission control - Work with ConfigMaps |
| Topic 5: Application Deployment | 20% | - Use Helm package manager - Manage Deployments, rolling updates and rollbacks - Implement deployment strategies - Work with Kustomize |
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NEW QUESTION # 48
You have a Deployment running a container image for a web application. The application's configuration files are currently stored within the image itself. you want to move the configuration files to a ConfigMap so that they can be updated independently or the application image. Describe the steps involved in modifying the Deployment and creating a ConfigMap to achieve this separation.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap:
- Create a ConfigMap using 'kubectl create configmap' with the configuration files. For example:
kubectl create configmap webapp-config -from-literal=config.json='{"port": 8080, "database_url": "mongodb://localhost27017"}'
- Replace 'config_json' with the name of your configuration file and the JSON content with your actual configuration values.
2. Modify the Deployment:
- Modify your Deployment YAML file to mount the ConfigMap as a volume. Here's an example:
- Modify your application code to read configuration files from '/etctwebapp/config' 3. Apply the Changes: - Apply the updated Deployment using 'kubectl apply -f deployment_yamr 4. Verify the Update: - Check the logs of the pods using 'kubectl logs -f You should see the application loading configuration values from the ConfigMap. 5. Update the Configuration: - You can now update the configuration files within the ConfigMap without rebuilding the image. For example.
- This will update the ConfigMap and trigger a rolling update of the Deployment, effectively updating the application configuration without rebuilding the image.
NEW QUESTION # 49
You are managing a Kubernetes cluster with multiple teams working on different projects. Each team needs its own isolated environment within the cluster to deploy tneir applications and manage their resources witnout interfering With others. Describe how you would use Kubernetes namespaces to achieve this, and provide an example of how you might configure a namespace for a team working on a new e-commerce application.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create Namespaces for Teams: use 'kubectl create namespace command to create namespaces for each team. For example, 'kubectl create namespace ecom-team'.
2. Configure Resource Quotas: Set resource limits for each namespace using 'kubectl create -f command. This prevents one team from consuming all the resources available on the cluster Heres a sample resource quota file:
3. Apply Role-Based Access Control (RBAC): IJse 'kubectl create -f ' command to define role bindings for each team. This allows you to control the actions that each team can perform within their namespace. Here's a sample role binding file:
4. Create Resources within the Namespace: Deploy your applications and other resources within the dedicated namespace for the e-commerce team. For example, you can deploy a 'Deployment Witn the following configuration:
5. Verify Namespace Configuration: IJse 'kubectl get namespaces' to list all namespaces, and 'kubectl describe namespace to view details of a specific namespace. 6. Manage Namespace Access: You can use tools like 'kubectl' or a graphical user interface (GIJI) to manage the access rights and resources within each namespace. 7. Cleanup: When a team no longer needs a specific namespace, you can delete it using 'kubectl delete namespace '.
NEW QUESTION # 50
You are developing a new application that requires access to multiple services running in different namespaces. To simplify the configuration and ensure that the application can easily discover these services, you want to use a ServiceAccount with a cluster-scoped Role that grants access to services across namespaces.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ClusterRole:
- Create a ClusterRole that grants access to the required services in all namespaces
2. Create a ClusterR01e3inding: - Create a ClusterRole8inding to bind the ClusterRole to the ServiceAccount:
3. Create a ServiceAccount - Create a ServiceAccount in the namespace where the application is deployed:
4. Apply the Configuration: - Apply the ClusterRole, ClusterRoleBinding, and ServiceAccount using 'kL1bectl apply -f: bash kubectl apply -f access-services-cluster-role yaml kubectl apply -f access-services-cluster-role-binding.yaml kubectl apply -f my-app-sa.yaml 5. Configure the Application: - Ensure that the applications pod is using the created ServiceAccount
6. Test the Application: - Run the application and verify that it can successfully access the services in different namespaces. ,
NEW QUESTION # 51
You are deploying a sensitive application that requires strong security measures. You need to implement a solution to prevent unauthorized access to the container's runtime environment. How would you use Seccomp profiles to enforce security policies at the container level?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Seccomp Profile:
- Create a new YAML file (e.g., 'seccomp-profile.yaml') to define your Seccomp profile.
- Specify the name of the Seccomp profile and the namespace where it will be applied.
- Define the allowed syscalls for the container. You can use the 'seccomp' tool or the
'k8s.io/kubernetes/pkg/security/apparmor/seccomp' package to generate the profile.
2. Apply the Seccomp Profile: - Apply the Seccomp profile to your cluster using the following command: bash kubectl apply -f seccomp-profile.yaml 3. Deploy Applications with Seccomp Profile: - Update your Deployment YAML file to include the Seccomp profile:
4. Verify the Seccomp Profile: - Check the status of the pods with 'kubectl describe pod - Look for the "Security Context" section and verify that the Seccomp profile is correctly applied. 5. Test the Restrictions: - Try to access system resources or make syscalls that are not allowed by your Seccomp profile. - Verify that the profile is effectively restricting the container's access to system resources.
NEW QUESTION # 52
You are running a Kubernetes cluster with a limited number of nodes, and you want to deploy a new application that requires a lot of resources. You are concerned about potential resource contention and performance issues with other existing applications. How would you use resource quotas to manage resource usage and prevent potential issues?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Resource Quota:
- Create a new YAML file (e.g., 'resource-quota.yaml') to define your resource quota.
- Specify the name of the resource quota and the namespace where it will be applied.
- Define the resource limits for the quota. For instance, you can set limits for CPU, memory, pods, services, etc.
2. Apply the Resource Quota: - Apply the resource quota to your cluster using the following command: bash kubectl apply -f resource-quota.yaml 3. Verify the Resource Quota: - Use the "kubectl get resourcequota' command to list the applied resource quotas and confirm their status. 4. Deploy Applications with Resource Requests: - When deploying your applications, ensure that you specify resource requests and limits in your Deployment YAML files. - This will help enforce the resource limits defined by your quota.
5. Monitor Resource Usage: - Use monitoring tools (e.g., Prometheus, Grafana) to track resource usage in your namespace and ensure that applications are staying within the resource limits defined by your quota.
NEW QUESTION # 53
......
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