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| Section | Weight | Objectives |
|---|---|---|
| Troubleshooting | 30% | - Network connectivity and DNS resolution problems - Cluster component health checks - Pod and application failures - Control plane component failures - Worker node issues and recovery - Log collection and analysis |
| Cluster Architecture, Installation & Configuration | 25% | - Implement high availability control plane - Prepare infrastructure for cluster installation - Understand CNI, CSI, CRI interfaces - Create and manage clusters with kubeadm - Work with CRDs and Operators - Install components via Helm / Kustomize - Manage RBAC - Manage cluster lifecycle and upgrades |
| Workloads & Scheduling | 15% | - Deployments, rolling updates and rollbacks - Configure applications with ConfigMaps and Secrets - Pod lifecycle, init containers, probes - Pod scheduling: node selector, affinity, taints/tolerations - Resource requests, limits and autoscaling |
| Storage | 10% | - StatefulSet storage configuration - Persistent Volumes (PV) and Persistent Volume Claims (PVC) - Volume types and access modes - StorageClasses and dynamic provisioning |
| Services & Networking | 20% | - Network policies - CoreDNS and service discovery - Service types: ClusterIP, NodePort, LoadBalancer, ExternalName - CNI configuration and troubleshooting - Ingress resources and controllers |
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NEW QUESTION # 80
Clean the cluster by deleting deployment and hpa you just created
Answer:
Explanation:
kubectl delete deploy webapp kubectl delete hpa webapp
NEW QUESTION # 81
Your organization uses a private DNS server for internal services and requires all Kubernetes pods to resolve names against this DNS server. You need to configure CoreDNS to forward all DNS requests to this private server.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1 . Configure CoreDNS with Forwarding:
- In the CoreDNS ConfigMap, configure the 'forward' plugin to forward all DNS requests to your private DNS server.
2. Test DNS Resolution: - Use the 'nslookup' command from a pod in your cluster to test DNS resolution for internal services. - The requests should be forwarded to the private DNS server, and the corresponding records should be returned.
NEW QUESTION # 82
Create a Kubernetes secret as follows:
Name: super-secret
password: bob
Create a pod named pod-secrets-via-file, using the redis Image, which mounts a secret named super-secret at /secrets.
Create a second pod named pod-secrets-via-env, using the redis Image, which exports password as CONFIDENTIAL
Answer:
Explanation:
solution
NEW QUESTION # 83
Score: 7%
Task
Reconfigure the existing deployment front-end and add a port specification named http exposing port 80/tcp of the existing container nginx.
Create a new service named front-end-svc exposing the container port http.
Configure the new service to also expose the individual Pods via a NodePort on the nodes on which they are scheduled.
Answer:
Explanation:
Solution:
kubectl get deploy front-end
kubectl edit deploy front-end -o yaml
#port specification named http
#service.yaml
apiVersion: v1
kind: Service
metadata:
name: front-end-svc
labels:
app: nginx
spec:
ports:
- port: 80
protocol: tcp
name: http
selector:
app: nginx
type: NodePort
# kubectl create -f service.yaml
# kubectl get svc
# port specification named http
kubectl expose deployment front-end --name=front-end-svc --port=80 --tarport=80 --type=NodePort
NEW QUESTION # 84
You must connect to the correct host.
Failure to do so may result in a zero score.
[candidate@base] $ ssh Cka000058
Context
You manage a WordPress application. Some Pods
are not starting because resource requests are
too high.
Task
A WordPress application in the relative-fawn
namespace consists of:
. A WordPress Deployment with 3 replicas.
Adjust all Pod resource requests as follows:
. Divide node resources evenly across all 3 Pods.
. Give each Pod a fair share of CPU and memory.
Answer:
Explanation:
Task Summary
You are managing a WordPress Deployment in namespace relative-fawn.
* Deployment has 3 replicas.
* Pods are not starting due to high resource requests.
* Your job:# Adjust CPU and memory requests so that all 3 pods evenly split the node's capacity.
Step-by-Step Solution
1## SSH into the correct host
bash
CopyEdit
ssh cka000058
# Skipping this will result in a zero score.
2## Check node resource capacity
You need to know the node's CPU and memory resources.
bash
CopyEdit
kubectl describe node | grep -A5 "Capacity"
Example output:
yaml
CopyEdit
Capacity:
cpu: 3
memory: 3Gi
Let's assume the node has:
* 3 CPUs
* 3Gi memory
So for 3 pods, divide evenly:
* CPU request per pod: 1
* Memory request per pod: 1Gi
## In the actual exam, check real values and divide accordingly. If the node has 4 CPUs and 8Gi, you'd allocate ~1.33 CPUs and ~2.66Gi RAM per pod (rounded reasonably).
3## Edit the Deployment
Edit the WordPress deployment in the relative-fawn namespace:
kubectl edit deployment wordpress -n relative-fawn
Look for the resources section under spec.template.spec.containers like this:
resources:
requests:
cpu: "1"
memory: "1Gi"
If the section doesn't exist, add it manually.
Save and exit the editor (:wq if using vi).
4## Confirm changes
Wait a few seconds, then check:
kubectl get pods -n relative-fawn
Ensure all 3 pods are in Running state.
You can also describe a pod to confirm resource requests are set:
kubectl describe pod <pod-name> -n relative-fawn | grep -A5 "Containers" ssh cka000058 kubectl describe node | grep -A5 "Capacity" kubectl edit deployment wordpress -n relative-fawn
# Set CPU: 1, Memory: 1Gi (or according to node capacity)
kubectl get pods -n relative-fawn
NEW QUESTION # 85
......
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