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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting | 30% | - Application and networking debugging - Cluster component troubleshooting |
| Topic 2: Services & Networking | 20% | - Network policies - Services (ClusterIP, NodePort, LoadBalancer) - Ingress configuration |
| Topic 3: Cluster Architecture, Installation & Configuration | 25% | - High availability setup - Kubernetes architecture components - Cluster installation and configuration |
| Topic 4: Workloads & Scheduling | 15% | - Deployments and rolling updates - Scheduling constraints - ConfigMaps and Secrets |
| Topic 5: Storage | 10% | - Storage classes - PersistentVolumes and PersistentVolumeClaims |
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NEW QUESTION # 46
You have a deployment named 'web-app' with three replicas, exposing the application using a 'LoadBalancer' service. The application uses an internal database service named 'db-service' that is running as a 'ClusterlP' service. You need to configure the 'web-app' deployment to only allow traffic from the service' to its internal port (e.g., 5432).
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Create a NetworkPolicy resource that allows traffic from the 'db-service' to the 'web-app' Deployment.
2. Apply the NetworkPolicy: - Apply the YAML file using 'kubectl apply -f networkpolicy.yaml'. 3. Verify the NetworkPolicy: - Check the status of the NetworkPolicy using 'kubectl get networkpolicies allow-db-to-web-app -n . 4. Test: - Ensure that the 'db-service' can communicate with the 'web-app' deployment on port 5432. - Attempt to connect to port 5432 on 'web-app' pods from outside the cluster or from other services/pods within the cluster that are not the 'db-service'. You should not be able to connect. Note: Replace with the actual namespace where your deployments and services are located.
NEW QUESTION # 47
Score: 4%
Task
Create a persistent volume with name app-data , of capacity 1Gi and access mode ReadOnlyMany. The type of volume is hostPath and its location is /srv/app-data .
Answer:
Explanation:
See the solution below.
Explanation
Solution:
#vi pv.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: app-config
spec:
capacity:
storage: 1Gi
accessModes:
- ReadOnlyMany
hostPath:
path: /srv/app-config
#
kubectl create -f pv.yaml
NEW QUESTION # 48
From the pod label name=cpu-utilizer, find pods running high CPU workloads and write the name of the pod consuming most CPU to the file /opt/KUTR00102/KUTR00102.txt (which already exists).
Answer:
Explanation:
solution
NEW QUESTION # 49
You have a Deployment that runs a containerized application. The application requires access to a specific service running in a different namespace. You need to define a NetworkPolicy to allow traffic from the application's Pods to the service in the other namespace only on port 8080.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Network Policy Definition:
2. Explanation: - 'apiVersion: networking.k8s.io/v1 Specifies the API version for NetworkPolicy resources. - 'kind: NetworkPolicy': Specifies that this is a NetworkPolicy resource. - 'metadata.name: allow-service-access': Sets the name of the NetworkPolicy. - 'metadata.namespace: Specifies the namespace where the NetworkPolicy is applied. Replace with the actual namespace where your deployment is running. - 'spec.podSelector.matchLabels: app: application': This selector targets Pods labeled with 'app: application', ensuring the NetworkPolicy applies to the application Pods. - 'spec.egress.to.namespaceSelector.matchLabels: service-namespace: This allows outgoing traffic only to the namespace labeled with 'service-namespace: Replace with the actual namespace of the service. - 'spec.egress.ports.port: 8080': This allows communication only on port 8080. - 'spec.egress.ports.protocol: TCP': Specifies the protocol (TCP) for the allowed port. 3. How it works: - This NetworkPolicy allows outgoing traffic from the application Pods only to the specified service in the different namespace and only on port 8080. It effectively restricts communication from the application Pods to only the intended target service. 4. Implementation: - Apply the YAML using 'kubectl apply -f allow-service-access.yaml' 5. Verification: After applying the NetworkPolicy, test the connectivity from the application Pods to the service in the other namespace on port 8080. You should observe that the NetworkPolicy successfully enforces the restrictions, allowing access only to the specified port and service.]
NEW QUESTION # 50
Score: 7%
Task
Given an existing Kubernetes cluster running version 1.20.0, upgrade all of the Kubernetes control plane and node components on the master node only to version 1.20.1.
Be sure to drain the master node before upgrading it and uncordon it after the upgrade.
You are also expected to upgrade kubelet and kubectl on the master node.
Answer:
Explanation:
See the solution below.
Explanation
SOLUTION:
[student@node-1] > ssh ek8s
kubectl cordon k8s-master
kubectl drain k8s-master --delete-local-data --ignore-daemonsets --force apt-get install kubeadm=1.20.1-00 kubelet=1.20.1-00 kubectl=1.20.1-00 --disableexcludes=kubernetes kubeadm upgrade apply 1.20.1 --etcd-upgrade=false systemctl daemon-reload systemctl restart kubelet kubectl uncordon k8s-master
NEW QUESTION # 51
......
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