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| Section | Weight | Objectives |
|---|---|---|
| Workloads & Scheduling | 15% | - Pod scheduling: node selector, affinity, taints/tolerations - Configure applications with ConfigMaps and Secrets - Pod lifecycle, init containers, probes - Resource requests, limits and autoscaling - Deployments, rolling updates and rollbacks |
| Storage | 10% | - StorageClasses and dynamic provisioning - StatefulSet storage configuration - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - Volume types and access modes |
| Services & Networking | 20% | - CoreDNS and service discovery - Network policies - CNI configuration and troubleshooting - Ingress resources and controllers - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName |
| Troubleshooting | 30% | - Worker node issues and recovery - Cluster component health checks - Pod and application failures - Network connectivity and DNS resolution problems - Control plane component failures - Log collection and analysis |
| Cluster Architecture, Installation & Configuration | 25% | - Understand CNI, CSI, CRI interfaces - Prepare infrastructure for cluster installation - Manage RBAC - Install components via Helm / Kustomize - Manage cluster lifecycle and upgrades - Implement high availability control plane - Work with CRDs and Operators - Create and manage clusters with kubeadm |
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NEW QUESTION # 73
Given a partially-functioning Kubernetes cluster, identify symptoms of failure on the cluster.
Determine the node, the failing service, and take actions to bring up the failed service and restore the health of the cluster. Ensure that any changes are made permanently.
You can ssh to the relevant I nodes (bk8s-master-0 or bk8s-node-0) using:
[student@node-1] $ ssh <nodename>
You can assume elevated privileges on any node in the cluster with the following command:
[student@nodename] $ | sudo -i
Answer:
Explanation:
solution
NEW QUESTION # 74
Create a nginx pod with label env=test in engineering namespace
Answer:
Explanation:
See the solution below.
Explanation
kubectl run nginx --image=nginx --restart=Never --labels=env=test --namespace=engineering --dry-run -o yaml > nginx-pod.yaml kubectl run nginx --image=nginx --restart=Never --labels=env=test --namespace=engineering --dry-run -o yaml | kubectl create -nengineering-f - YAML File:
apiVersion: v1
kind: Pod
metadata:
name: nginx
namespace: engineering
labels:
env: test
spec:
containers:
- name: nginx
image: nginx
imagePullPolicy: IfNotPresent
restartPolicy: Never
kubectl create -f nginx-pod.yaml
NEW QUESTION # 75
Your team has deployed a containerized application on Kubernetes. You have configured a deployment with a replica count of 3 pods. The application uses a resource-intensive process that consumes a significant amount of CPU resources. You are experiencing performance issues and suspect that the pods are competing for resources. Explain how you can use resource quotas and limits to address this problem.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Resource Limits for Pods:
- Modify the deployment configuration to set resource limits for each pod, specifying the maximum CPU and memory resources they can consume. This prevents pods from exceeding their resource allocations, ensuring fairer resource distribution.
2. Implement Resource Quotas at the Namespace Level: - Define resource quotas for the namespace where your application is running. This limits the overall resource consumption within the namespace, preventing any single pod from monopolizing resources.
3. Monitor Resource Usage and Adjust Limits: - Continuously monitor the resource usage of your pods and the namespace. Analyze the CPU and memory utilization to identify any resource contention. - Adjust resource limits and quotas as needed to fine-tune the resource allocation and improve performance.
NEW QUESTION # 76
Create a redis pod named "test-redis" and exec into that pod and create a file named "test-file.txt" with the text 'This is called the test file' in the path /data/redis and open another tab and exec again with the same pod and verifies file exist in the same path.
Answer: A
NEW QUESTION # 77
Scale the deploymentwebserverto6pods.
Answer:
Explanation:
See the solution below.
Explanation
solution
NEW QUESTION # 78
......
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