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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 30% | - Application and networking debugging - Cluster component troubleshooting |
| Storage | 10% | - Storage classes - PersistentVolumes and PersistentVolumeClaims |
| Services & Networking | 20% | - Services (ClusterIP, NodePort, LoadBalancer) - Ingress configuration - Network policies |
| Cluster Architecture, Installation & Configuration | 25% | - Kubernetes architecture components - Cluster installation and configuration - High availability setup |
| Workloads & Scheduling | 15% | - ConfigMaps and Secrets - Scheduling constraints - Deployments and rolling updates |
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NEW QUESTION # 36
Delete the above pod and create again from the same yaml file
and verifies there is no "test-file.txt" in the path /data/redis
(Since non-persistent storage "emptyDir" is used).
Answer:
Explanation:
kubectl delete pod test-redis kubectl create -f test-redis.yaml kubectl exec -it test-redis /bin/sh cat /data/redis/file.txt // file doesn't exist
NEW QUESTION # 37
A Kubernetes worker node, named wk8s-node-0 is in state NotReady. Investigate why this is the case, and perform any appropriate steps to bring the node to a Ready state, ensuring that any changes are made permanent.
You can ssh to the failed node using:
[student@node-1] $ | ssh Wk8s-node-0
You can assume elevated privileges on the node with the following command:
[student@w8ks-node-0] $ | sudo -i
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION # 38
You have a Kubernetes cluster with three nodes. Nodel and Node2 are in the 'default' availability zone, while Node3 is in the 'us-east-I a' availability zone. You want to ensure that pods are spread across all three nodes, considering the availability zones.
Describe how to configure the cluster to achieve this goal, specifically addressing how to leverage 'nodeSelector' and/or 'affinity' to enforce desired node placement. Explain the rationale behind your chosen approach.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Configure Node Labels
Label each node with its corresponding availability zone:
For Node1 and Node2 (in 'default' availability zone):
kubectl label node availability-zone=default
For Node3 (in availability zone):
kubectl label node availability-zone=us-east-Ia
Step 2: Use Node Selector
Use 'nodeSelector' in your Deployment or Pod definition to specify the desired availability zone:
This ensures pods with the 'nginx-deployment' label will be scheduled only on Node3. Step 3: Use Affinity (Optional) You can also use 'affinity' for more fine-grained control. For example, to ensure that pods are spread across different availability zones:
This configuration will prefer scheduling pods in different availability zones. Rationale: Node Selector: Provides a simple mechanism to direct pods to specific nodes based on labels. Affinity: Offers more advanced options, including 'podAntiAffinity" to spread pods across nodes (or availability zones) and 'podAffinity' to ensure pods are scheduled on the same node. Availability Zone: Distributes pods across different zones for high availability, as failures in one zone won't impact pods scheduled in other zones. ,
NEW QUESTION # 39
Create a snapshot of the etcd instance running at https://127.0.0.1:2379, saving the snapshot to the file path
/srv/data/etcd-snapshot.db.
The following TLS certificates/key are supplied for connecting to the server with etcdctl:
* CA certificate: /opt/KUCM00302/ca.crt
* Client certificate: /opt/KUCM00302/etcd-client.crt
* Client key: Topt/KUCM00302/etcd-client.key
Answer:
Explanation:
NEW QUESTION # 40
Get list of all pods in all namespaces and write it to file "/opt/pods-list.yaml" See the solution below.
Answer:
Explanation:
kubectl get po -all-namespaces > /opt/pods-list.yaml
NEW QUESTION # 41
......
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