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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cluster Architecture, Installation & Configuration | 25% | - Create and manage clusters with kubeadm - Prepare infrastructure for cluster installation - Implement high availability control plane - Install components via Helm / Kustomize - Manage cluster lifecycle and upgrades - Work with CRDs and Operators - Manage RBAC - Understand CNI, CSI, CRI interfaces |
| Topic 2: Storage | 10% | - StatefulSet storage configuration - Volume types and access modes - StorageClasses and dynamic provisioning - Persistent Volumes (PV) and Persistent Volume Claims (PVC) |
| Topic 3: Services & Networking | 20% | - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - CoreDNS and service discovery - Ingress resources and controllers - Network policies - CNI configuration and troubleshooting |
| Topic 4: Workloads & Scheduling | 15% | - Pod scheduling: node selector, affinity, taints/tolerations - Configure applications with ConfigMaps and Secrets - Pod lifecycle, init containers, probes - Deployments, rolling updates and rollbacks - Resource requests, limits and autoscaling |
| Topic 5: Troubleshooting | 30% | - Log collection and analysis - Pod and application failures - Worker node issues and recovery - Control plane component failures - Cluster component health checks - Network connectivity and DNS resolution problems |
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NEW QUESTION # 17
Create the nginx pod with version 1.17.4 and expose it on port 80
Answer:
Explanation:
kubectl run nginx --image=nginx:1.17.4 --restart=Never -- port=80
NEW QUESTION # 18
Get list of PVs and order by size and write to file "/opt/pvstorage.txt"
Answer:
Explanation:
kubectl get pv --sort-by=.spec.capacity.storage > /opt/pv storage.txt
NEW QUESTION # 19
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 # 20
Describe the difference between 'ReadWriteOnce' and access modes for PersistentVolumeClaims. In what scenarios would you choose each?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
ReadWriteOnce:
- Description: This mode allows only one pod to mount the volume at a time.
- Scenarios: Ideal for applications requiring exclusive access to the storage, such as databases where data integrity is crucial. Examples include:
- Single-instance databases (e.g., MySQL, PostgreSQL)
- Applications that modify files concurrently and need to ensure consistency.
ReadWriteMany:
- Description: This mode allows multiple pods to mount the volume simultaneously.
- Scenarios: Suitable for applications that need shared access to data, such as shared storage for applications, I configuration files, or log files. Examples include:
- Shared file systems (e.g., NFS, GlusterFS)
- Applications where multiple pods need to access the same data simultaneously.
NEW QUESTION # 21
You are setting up a Kubernetes cluster and you need to configure a NetworkPolicy to allow all traffic from pods in a specific namespace to other namespaces, but block all traffic from other namespaces to this specific namespace. 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 specific namespace where you want to restrict incoming traffic.
- Code:
2. Apply the NetworkPolicy: - Apply the NetworkPolicy using 'kubectl apply -f networkpolicy.yaml'
NEW QUESTION # 22
......
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