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| Section | Weight | Objectives |
|---|---|---|
| Services & Networking | 20% | - Ingress resources and controllers - CoreDNS and service discovery - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - CNI configuration and troubleshooting - Network policies |
| Storage | 10% | - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - StatefulSet storage configuration - StorageClasses and dynamic provisioning - Volume types and access modes |
| Workloads & Scheduling | 15% | - Resource requests, limits and autoscaling - Deployments, rolling updates and rollbacks - Pod lifecycle, init containers, probes - Configure applications with ConfigMaps and Secrets - Pod scheduling: node selector, affinity, taints/tolerations |
| Troubleshooting | 30% | - Control plane component failures - Network connectivity and DNS resolution problems - Pod and application failures - Cluster component health checks - Worker node issues and recovery - Log collection and analysis |
| Cluster Architecture, Installation & Configuration | 25% | - Work with CRDs and Operators - Create and manage clusters with kubeadm - Manage RBAC - Manage cluster lifecycle and upgrades - Implement high availability control plane - Install components via Helm / Kustomize - Understand CNI, CSI, CRI interfaces - Prepare infrastructure for cluster installation |
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NEW QUESTION # 67
Create a pod with image nginx called nginx and allow traffic on port 80
Answer:
Explanation:
kubectl run nginx --image=nginx --restart=Never --port=80
NEW QUESTION # 68
You have a Kubernetes cluster running several applications. You want to implement a network policy that allows traffic only between pods within the same deployment and denies all other traffic. How can you achieve this using NetworkPolicies?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Create a NetworkPolicy in the namespace where the deployments are located.
- Code:
2. Apply the NetworkPolicy: - Apply the NetworkPolicy using 'kubectl apply -f networkpolicy.yaml'
NEW QUESTION # 69
Get the pods with labels env=dev and env=prod and output the labels as well
Answer:
Explanation:
kubectl get pods -l 'env in (dev,prod)' --show-labels
NEW QUESTION # 70
You are running a Kubernetes cluster with a NodePort service exposing a web application on port 80. You want to access the web application from a client machine outside the cluster. However, the client machine is behind a NAT gateway and you cannot directly configure firewall rules on the gateway. How can you configure the Kubernetes cluster to allow the client machine to access the web application?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NodePort Service:
- Create a NodePort service that exposes port 80 of the web application on a specific NodePort (for example,
30080).
- Code:
2. Configure NAT Gateway: - Configure the NAT gateway to forward traffic from the client machine's IP address and port to the Kubernetes cluster's IP address and the NodePort. - Note: This configuration will depend on the specific NAT gateway and its configuration options. 3. Access the Application: - On the client machine, access the web application by using the Kubernetes cluster's IP address and the NodePort. - Example: 'http://:30080'
NEW QUESTION # 71
Create a busybox pod that runs the command "env" and save the output to "envpod" file See the solution below.
Answer:
Explanation:
kubectl run busybox --image=busybox --restart=Never --rm -it -- env > envpod.yaml
NEW QUESTION # 72
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