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| Section | Weight | Objectives |
|---|---|---|
| Services & Networking | 20% | - Use the Gateway API to manage Ingress traffic - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Define and enforce Network Policies - Understand connectivity between Pods - Understand and use CoreDNS - Know how to use Ingress controllers and Ingress resources |
| Storage | 10% | - Understand volume mode, access modes and reclaim policies - Understand Storage Classes and Persistent Volumes - Understand persistent volume claims primitive - Understand how to configure applications with persistent storage |
| Cluster Architecture, Installation & Configuration | 25% | - Understand extension interfaces (CNI, CSI, CRI, etc.) - Create and manage Kubernetes clusters using kubeadm - Manage role based access control (RBAC) - Understand CRDs, install and configure operators - Manage the lifecycle of Kubernetes clusters - Implement and configure a highly-available control plane - Use Helm and Kustomize to install cluster components - Prepare underlying infrastructure for installing a Kubernetes cluster |
| Troubleshooting | 30% | - Manage container stdout & stderr logs - Troubleshoot cluster component failure - Evaluate cluster and node logging - Understand how to monitor applications - Troubleshoot networking - Troubleshoot application failure |
| Workloads & Scheduling | 15% | - Understand Deployments and rolling update/rollback - Understand resource limits and requests - Use label selectors to schedule Pods - Understand how to run multiple schedulers and configure scheduler policies - Use ConfigMaps and Secrets to configure applications - Understand how scheduler works - Understand Static Pods - Understand DaemonSets |
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NEW QUESTION # 12
How would you configure a PersistentVolumeClaim with a storage class for a specific type of storage, such as SSD or NVMe, and how would you specify the storage capacity?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a Storage Class:
- Define a storage class that specifies the desired storage type (SSD or NVMe) and any other relevant parameters.
2. Define the PersistentVolumeClaim: - Create a PersistentVolumeClaim with the storage class you defined in the previous step. Specify the desired storage capacity using the 'resources.requests.storage' field.
3. Apply the Changes: - Apply the storage class and PersistentVolumeClaim using 'kubectl apply -f fast-storage.yaml' and 'kubectl apply -f my-pvc.yaml' - The storage class 'fast-storage' in this example specifies the use of AWS EBS volumes with the 'gp2' volume type (SSD) and encryption enabled. - The PersistentVolumeClaim is configured to use the 'fast-storage' class and requests IOGi of storage. This configuration ensures that the PVC provisioned for the pod uses the specified storage class (SSD in this case) and the requested storage capacity.
NEW QUESTION # 13
Create 2 nginx image pods in which one of them is labelled with env=prod and another one labelled with env=dev and verify the same.
Answer:
Explanation:
See the solution below.
Explanation
kubectl run --generator=run-pod/v1 --image=nginx -- labels=env=prod nginx-prod --dry-run -o yaml > nginx-prodpod.yaml Now, edit nginx-prod-pod.yaml file and remove entries like "creationTimestamp: null"
"dnsPolicy: ClusterFirst"
vim nginx-prod-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
env: prod
name: nginx-prod
spec:
containers:
- image: nginx
name: nginx-prod
restartPolicy: Always
# kubectl create -f nginx-prod-pod.yaml
kubectl run --generator=run-pod/v1 --image=nginx --
labels=env=dev nginx-dev --dry-run -o yaml > nginx-dev-pod.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
env: dev
name: nginx-dev
spec:
containers:
- image: nginx
name: nginx-dev
restartPolicy: Always
# kubectl create -f nginx-prod-dev.yaml
Verify :
kubectl get po --show-labels
kubectl get po -l env=prod
kubectl get po -l env=dev
NEW QUESTION # 14
You have a Deployment named 'frontend-deployment' with 5 replicas of a frontend container. You need to implement a rolling update strategy that allows for a maximum of 2 pods to be unavailable at any given time. You also want to ensure that the update process is completed within a specified timeout of 8 minutes. If the update fails to complete within the timeout, the deployment should revert to the previous version. Additionally, you want to configure a 'post-start' hook for the frontend container that executes a health check script to verify the application's readiness before it starts accepting traffic.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Update the 'replicas' to 5.
- Define 'maxUnavailable: 2' and 'maxSurge: 0' in the 'strategy.rollingUpdate' section to control the rolling update process.
- Configure a 'strategy.type' to 'RollingUpdate' to trigger a rolling update when the deployment is updated.
- Set Always' to ensure that the new image is pulled even if
it exists in the pod's local cache.
- Add a 'spec.progressDeadlineSeconds: 480' to set a timeout of 8 minutes for the update process.
- Add a 'spec.template.spec.containers[0].lifecycle.postStart' hook to define a script that executes a health check script before the container starts accepting traffic.
2. Create the Deployment: - Apply the updated YAML file using 'kubectl apply -f frontend-deployment.yaml' 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments frontend-deployment' to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to the 'my.org/frontend:latest' Docker Hub repository. 5. Monitor the Deployment: - Use 'kubectl get pods -l app=frontend' to monitor the pod updates during the rolling update process. 6. Observe Rollback if Timeout Exceeds: - If the update process takes longer than 8 minutes to complete, the deployment will be rolled back to the previous version. This can be observed using 'kubectl describe deployment frontend-deployment' and checking the 'updatedReplicas' and 'availableReplicas' fields.,
NEW QUESTION # 15
Print all pod name and all image name and write it to a file
name "/opt/pod-details.txt"
Answer:
Explanation:
kubectl get pods -o=custom-columns='Pod Name:metadata.name','Image:spec.containers[*].image' > /opt/pod-details.txt
NEW QUESTION # 16
You have a Kubernetes cluster with three nodes. You need to create a Role that allows users in the "developers" group to access the "nginx-deployment" deployment in the "default" namespace. This role should only permit users to view and update the deployment, not delete it.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create the Role:
2. Create the RoleBinding:
3. Apply the Role and RoleBinding: bash kubectl apply -f role.yaml kubectl apply -f rolebinding.yaml
NEW QUESTION # 17
......
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