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Linux Foundation Certified Kubernetes Administrator (CKA) Program is a certification exam that validates one's skills and knowledge in Kubernetes administration. This program is offered by the Linux Foundation, a non-profit organization that aims to promote and support the growth of open source software. The CKA exam is designed to test one's ability to install, configure, and manage Kubernetes clusters, as well as troubleshoot common issues that may arise.
Linux Foundation Certified Kubernetes Administrator (CKA) Program is an industry-leading certification designed for IT professionals who want to prove their expertise in Kubernetes administration. Kubernetes is an open-source container orchestration platform that automates the deployment, scaling, and management of containerized applications. The CKA program is designed to assess an individual’s skills in Kubernetes administration and to provide a certification that is recognized by the industry.
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NEW QUESTION # 16
Score: 7%
Task
Create a new nginx Ingress resource as follows:
* Name: ping
* Namespace: ing-internal
* Exposing service hi on path /hi using service port 5678
Answer:
Explanation:
See the solution below.
Explanation
Solution:
vi ingress.yaml
#
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ping
namespace: ing-internal
spec:
rules:
- http:
paths:
- path: /hi
pathType: Prefix
backend:
service:
name: hi
port:
number: 5678
#
kubectl create -f ingress.yaml
NEW QUESTION # 17
What is the maximum number of samples that can be submitted to WildFire manually per day?
Answer: A
NEW QUESTION # 18
You have a Deployment named 'web-app' running 3 replicas of a web server. You need to define a PodDisruptionBudget (PDB) that ensures at least 2 replicas of the 'web-app' are always available during a planned or unplanned disruption. Write the YAML definition for the PDB and explain how it helps to ensure availability.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. PDB YAML Definition:
2. Explanation: - 'apiVersion: policy/vl Specifies the API version for the PodDisruptionBudget resource. - 'kind: PodDisruptionBudget': Specifies the type of resource, which is a PodDisruptionBudget. - 'metadata.name: web-app-pdb': Sets the name of the PDB. - 'spec.selector.matchLabels: app: web-app': This selector targets the Pods labeled with 'app: web-app' , ensuring the PDB applies to the 'web-app' Deployment's Pods. - 'spec.minAvailable: 2: Specifies the minimum number of Pods (replicas) that must remain available during a disruption. In this case, at least 2 replicas of 'web-app' must be running. 3. How it ensures availability: - Planned Disruptions: If you need to perform a maintenance operation that requires taking down a Pod, the Kubernetes scheduler will not allow it if doing so would violate the PDB. For example, if you try to delete a Pod belonging to 'web-app' , the scheduler will prevent it because deleting it would reduce the available replicas below the 'minAvailable' threshold. - Unplanned Disruptions: In case of node failures, the PDB helps to protect the application by ensuring that the minimum required number of Pods remain running on other healthy nodes. 4. Implementation: - Apply the YAML using 'kubectl apply -f web-app-pdb.yamr 5. Verification: You can verify the PDB's effectiveness by trying to delete Pods or simulate a node failure. You should observe that the scheduler prevents actions that would violate the 'minAvailable' constraint.
NEW QUESTION # 19
Set the node named ek8s-node-1 as unavailable and reschedule all the pods running on it.
Answer:
Explanation:
solution
NEW QUESTION # 20
Quick Reference
ConfigMaps,
Documentation Deployments,
Namespace
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cka000048b
Task
An NGINX Deployment named nginx-static is running in the nginx-static namespace. It is configured using a ConfigMap named nginx-config .
First, update the nginx-config ConfigMap to also allow TLSv1.2. connections.
You may re-create, restart, or scale resources as necessary.
You can use the following command to test the changes:
[candidate@cka000048b] $ curl -- tls-max
1.2 https://web.k8s.local
Answer:
Explanation:
Task Summary
* SSH into cka000048b
* Update the nginx-config ConfigMap in the nginx-static namespace to allow TLSv1.2
* Ensure the nginx-static Deployment picks up the new config
* Verify the change using the provided curl command
Step-by-Step Instructions
Step 1: SSH into the correct host
ssh cka000048b
Step 2: Get the ConfigMap
kubectl get configmap nginx-config -n nginx-static -o yaml > nginx-config.yaml Open the file for editing:
nano nginx-config.yaml
Look for the TLS configuration in the data field. You are likely to find something like:
ssl_protocols TLSv1.3;
Modify it to include TLSv1.2 as well:
ssl_protocols TLSv1.2 TLSv1.3;
Save and exit the file.
Now update the ConfigMap:
kubectl apply -f nginx-config.yaml
Step 3: Restart the NGINX pods to pick up the new ConfigMap
Pods will not reload a ConfigMap automatically unless it's mounted in a way that supports dynamic reload and the app is watching for it (NGINX typically doesn't by default).
The safest way is to restart the pods:
Option 1: Roll the deployment
kubectl rollout restart deployment nginx-static -n nginx-static
Option 2: Delete pods to force recreation
kubectl delete pod -n nginx-static -l app=nginx-static
Step 4: Verify using curl
Use the provided curl command to confirm that TLS 1.2 is accepted:
curl --tls-max 1.2 https://web.k8s.local
A successful response means the TLS configuration is correct.
Final Command Summary
ssh cka000048b
kubectl get configmap nginx-config -n nginx-static -o yaml > nginx-config.yaml nano nginx-config.yaml # Modify to include "ssl_protocols TLSv1.2 TLSv1.3;" kubectl apply -f nginx-config.yaml kubectl rollout restart deployment nginx-static -n nginx-static
# or
kubectl delete pod -n nginx-static -l app=nginx-static
curl --tls-max 1.2 https://web.k8s.local
NEW QUESTION # 21
......
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