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| Section | Objectives |
|---|---|
| Topic 1: State Persistence | - Storage classes and volume mounting - PersistentVolumes and PersistentVolumeClaims |
| Topic 2: Services and Networking | - Services (ClusterIP, NodePort) - Ingress basics - Pod networking concepts |
| Topic 3: Application Deployment | - Use Kubernetes primitives to implement deployments - Understand rolling updates and rollbacks |
| Topic 4: Application Design and Build | - Define, build and modify container images - Understand Jobs and CronJobs - Understand multi-container Pod design patterns |
| Topic 5: Application Environment, Configuration and Security | - Security contexts and service accounts - ConfigMaps and Secrets usage |
| Topic 6: Application Observability and Maintenance | - Monitor and troubleshoot applications - Understand probes and health checks |
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NEW QUESTION # 171
You have a Deployment running a microservice that is responsible for processing user data To ensure the security of this data, you need to implement a NetworkPolicy that restricts network traffic to and from the microservice's pods.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a NetworkP01icy:
- Create a NetworkPolicy YAML file to define the traffic rules:
2. Apply the NetworkPolicy: - Apply tne NetworkPoliCY configuration to your Kubernetes cluster: basn kubectl apply -f restrict-microservice-traffic_yaml 3. Test the NetworkPoIicy: - Create a pod in a different namespace or on a different node. - Attempt to connect to the microservice pod from the new pod. - Verity that the connection is blocked as per the defined NetworkPolicy rules.
NEW QUESTION # 172
Exhibit:
Context
A web application requires a specific version of redis to be used as a cache.
Task
Create a pod with the following characteristics, and leave it running when complete:
* The pod must run in the web namespace.
The namespace has already been created
* The name of the pod should be cache
* Use the Ifccncf/redis image with the 3.2 tag
* Expose port 6379
Answer: B
NEW QUESTION # 173
You have a Deployment named 'my-app-deployment' running three replicas of an application container. You need to implement a rolling update strategy were only one pod is updated at a time. Additionally, you need to ensure tnat tne update process is triggered automatically whenever a new image is pushed to your private Docker registry.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Update the Deployment YAML:
- Update the 'replicas' to 2.
- Define 'maxunavailable: 1' and 'maxSurge: O' in the 'strategy-rollinglJpdate' section to control the rolling update process.
- Configure a 'strategy.types to 'Rollingupdates to trigger a rolling update wnen the deployment is updated.
- Add a 'spec-template.spec.imagePullP01icy: Always' to ensure tnat tne new image is pulled even if it exists in the pod's local cache.
- Add a 'spec-template-spec-imagePullSecrets' section to provide access to your private Docker registry. Replace 'registry-secret with the actual name of your secret.
2. Create the Deployment - Apply the updated YAML file using 'kubectl apply -f my-app-deployment.yamr 3. Verify the Deployment: - Check the status of the deployment using 'kubectl get deployments my-app-deployment' to confirm the rollout and updated replica count. 4. Trigger the Automatic Update: - Push a new image to your private Docker registry with a tag like 'your-private-registry.com/your-namespacemy-app:latest. 5. Monitor the Deployment: - Use 'kubectl get pods -l app=my-apps to monitor the pod updates during the rolling update process. You will observe that one pod is terminated at a time, while one new pod with the updated image is created. 6. Check for Successful Update: - Once the deployment is complete, use 'kubectl describe deployment my-app-deployment' to see that the updatedReplicas' field matches the 'replicas' field, indicating a successful update. ]
NEW QUESTION # 174
You have a ConfigMap named 'my-app-config' that stores environment variables for your application. You want to dynamically update tne values in the ConfigMap without restarting the pods. How would you achieve this using a Kubernetes Patch?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Get the Existing ConfigMap Data:
bash
kubectl get configmap my-app-config -o yaml > my-app-config.yaml
2. Modify the YAML File:
- Open 'my-app-config.yaml and update the values in the 'data' section as required- For example, if you want to change the value of 'DATABASE_HOST to Sdb.new.example.coms:
3. Patch the ConfigMap: bash kubectl patch configmap my-app-config -p "S(cat my-app-config_yaml)" 4. Verify the Changes: bash kubectl get configmap my-app-config -o yaml 5. Observe the Updated Values: - The pods will automatically pick up the updated values without the need for restarting. - You can confirm this by checking the environment variables within the pod using 'kubectl exec -it - bash -c 'env" This method allows for dynamic updates to the ConfigMap without restarting the pods, making it a convenient way to manage environment variables in your Kubernetes applications.
NEW QUESTION # 175
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh ckad00029
Task
Modify the existing Deployment named store-deployment, running in namespace grubworm, so that its containers
* run with user ID 10000 and
* have the NET_BIND_SERVICE capability added
The store-deployment 's manifest file Click to copy
/home/candidate/daring-moccasin/store-deplovment.vaml
Answer:
Explanation:
See the Explanation below for complete solution.
Explanation:
ssh ckad00029
You must modify the existing Deployment store-deployment in namespace grubworm so that its containers:
* run as user ID 10000
* have Linux capability NET_BIND_SERVICE added
And you're told to use the manifest file at:
/home/candidate/daring-moccasin/store-deplovment.vaml (note: the filename looks misspelled; follow it exactly on the host)
1) Inspect the current Deployment and locate the manifest file
kubectl -n grubworm get deploy store-deployment
ls -l /home/candidate/daring-moccasin/
Open the manifest:
sed -n '1,200p' "/home/candidate/daring-moccasin/store-deplovment.vaml"
2) Edit the manifest to add SecurityContext
Edit the file:
vi "/home/candidate/daring-moccasin/store-deplovment.vaml"
2.1 Set Pod-level runAsUser = 10000
Under:
spec.template.spec add:
securityContext:
runAsUser: 10000
2.2 Add NET_BIND_SERVICE capability at container-level
Under the container spec (for each container in containers:), add:
securityContext:
capabilities:
add: ["NET_BIND_SERVICE"]
A complete example of what it should look like (mind indentation):
apiVersion: apps/v1
kind: Deployment
metadata:
name: store-deployment
namespace: grubworm
spec:
template:
spec:
securityContext:
runAsUser: 10000
containers:
- name: store
image: someimage
securityContext:
capabilities:
add: ["NET_BIND_SERVICE"]
Important notes:
* runAsUser can be set at Pod level (applies to all containers) or per-container. Pod-level is cleanest if all containers should run as 10000.
* Capabilities must be set per-container (that's where Kubernetes supports it).
Save and exit.
3) Apply the updated manifest
kubectl apply -f "/home/candidate/daring-moccasin/store-deplovment.vaml"
4) Ensure the Deployment rolls out
kubectl -n grubworm rollout status deploy store-deployment
5) Verify the settings are in effect
Check the rendered pod template:
kubectl -n grubworm get deploy store-deployment -o jsonpath='{.spec.template.spec.securityContext}{"\n"}' kubectl -n grubworm get deploy store-deployment -o jsonpath='{.spec.template.spec.containers[0].
securityContext}{"\n"}'
Verify on a running pod:
kubectl -n grubworm get pods
kubectl -n grubworm describe pod <pod-name> | sed -n '/Security Context:/,/Containers:/p' kubectl -n grubworm describe pod <pod-name> | sed -n '/Containers:/,/Conditions:/p' If there are multiple containers Repeat the container-level securityContext.capabilities.add block for each container under spec.template.spec.
containers.
NEW QUESTION # 176
......
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2026 Latest TrainingDumps CKAD PDF Dumps and CKAD Exam Engine Free Share: https://drive.google.com/open?id=1OZvaDB1xumfHfDdKdV_r6kERFi6tdS6z