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| Section | Weight | Objectives |
|---|---|---|
| Application Design and Build | 20% | - Choose and use appropriate workload resources - Define, build and modify container images - Understand multi-container Pod design patterns - Utilize persistent and ephemeral volumes |
| Services and Networking | 20% | - Understand and apply NetworkPolicies - Use Ingress rules - Expose applications via Services - Troubleshoot network access |
| Application Environment, Configuration and Security | 25% | - Use custom resources and extensions - Use ServiceAccounts - Understand authentication, authorization and admission control - Create and consume Secrets - Apply application security settings - Work with ConfigMaps - Configure resource requirements, limits and quotas |
| Application Deployment | 20% | - Work with Kustomize - Use Helm package manager - Implement deployment strategies - Manage Deployments, rolling updates and rollbacks |
| Application Observability and Maintenance | 15% | - Work with container logs - Implement probes and health checks - Understand API deprecations - Monitor applications using CLI tools - Debug applications in Kubernetes |
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NEW QUESTION # 238
Context
Anytime a team needs to run a container on Kubernetes they will need to define a pod within which to run the container.
Task
Please complete the following:
* Create a YAML formatted pod manifest
/opt/KDPD00101/podl.yml to create a pod named app1 that runs a container named app1cont using image Ifccncf/arg-output with these command line arguments: -lines 56 -F
* Create the pod with the kubect1 command using the YAML file created in the previous step
* When the pod is running display summary data about the pod in JSON format using the kubect1 command and redirect the output to a file named /opt/KDPD00101/out1.json
* All of the files you need to work with have been created, empty, for your convenience
Answer:
Explanation:
See the solution below.
Explanation:
Solution:
NEW QUESTION # 239
Context
An existing web application must be exposed externally.
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh ckad00025
An application externally using the URL external.sterling-bengal.local . Any requests starting with / must be routed to the application web-app.
To test the web application's external reachability, run
[candidate@ckad00025]
$ curl http://external.sterling-bengal.local/
or open this URL in the remote desktop's browser.
Answer:
Explanation:
See the Explanation below for complete solution.
Explanation:
ssh ckad00025
You need to expose the existing app "web-app" externally at:
* Host: external.sterling-bengal.local
* Path: / (and anything starting with /) # route to web-app
In CKAD labs, this is almost always done with an Ingress pointing to the Service web-app.
1) Find where web-app Service lives (namespace + port)
kubectl get svc -A | grep -w web-app
You'll get something like:
<NAMESPACE> web-app ClusterIP ... <PORT>/TCP
Set the namespace:
NS=<NAMESPACE>
Check the service port(s):
kubectl -n $NS get svc web-app -o yaml
Note the service port number (commonly 80).
Also verify it has endpoints (so it actually routes to pods):
kubectl -n $NS get endpoints web-app -o wide
If endpoints are empty, the Service selector doesn't match pods - tell me and I'll give the exact fix. But usually it's fine.
2) Create the Ingress to route / to web-app
Create a manifest (use the service port you saw; I'll assume 80 below):
cat <<'EOF' > web-app-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: web-app-ingress
spec:
rules:
- host: external.sterling-bengal.local
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: web-app
port:
number: 80
EOF
Apply it:
kubectl -n $NS apply -f web-app-ingress.yaml
Verify:
kubectl -n $NS get ingress web-app-ingress
kubectl -n $NS describe ingress web-app-ingress
If your Service port is not 80, change number: 80 to the correct value and re-apply.
3) Test external reachability (as instructed)
Run exactly:
curl
-i http://external.sterling-bengal.local/
If curl still fails (quick checks)
A) Is there an ingress controller running?
kubectl get pods -A | egrep -i 'ingress|nginx'
kubectl get svc -A | egrep -i 'ingress|nginx'
B) Does Ingress show an address?
kubectl -n $NS get ingress web-app-ingress -o wide
C) Do we have endpoints?
kubectl -n $NS get endpoints web-app -o wide
NEW QUESTION # 240
You are developing a new microservice that requires access to a database deployed in a different namespace. You want to configure a ServiceAccount and RoleBinding to provide the necessary permissions for the microservice to connect to the database.
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Create a ServiceAccount:
- Create a ServiceAccount in the namespace where our microservice is deployed:
2. Create a Role: - Create a Role in the namespace where the database is deployed, granting access to the database resources:
3. Create a ROIeBinding: - Create a RoleBinding in the database namespace to bind the Role to the ServiceAccount:
4. Apply the Configuration: - Apply the created ServiceAccount, Role, and Roledinding using 'kubectl apply -r commands: bash kubectl apply -f my-microservice-sa_yaml kubectl apply -f my-database-access-role-yaml kubectl apply -f my-database-access-rolebinding.yaml 5. Configure the Microservice: - Mount the ServiceAccount token as a secret within the microservice's pod:
6. Verify Permissions: - Access the database from the microservice pod to verify that the required permissions are granted.
NEW QUESTION # 241
You are developing a multi-container application that includes a web server, a database, and a message broker. You want to ensure that the database and message broker start before the web server to avoid dependency issues. How can you design your deployment to achieve this?
Answer:
Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Pod with Containers:
- Create a 'Pod' definition with three containers: 'web-server', 'database' , and 'message-broker
- Include the appropriate image names for each container.
2. Implement Init Containers: - Define ' initcontainers' within the 'Pod' spec to run containers before the main application containers. - Use 'initContainers' to set up the database and message broker:
3. Apply the Pod Definition: - Apply the 'Pod' definition using 'kubectl apply -f multi-container-app.yamr 4. Verify Container Startup Order: - Check the pod logs using 'kubectl logs -f multi-container-app'. You will observe the init containers ('database-init and 'message-broker-init') starting first, followed by the main containers ('web-server', 'database' , and 'message-broker'). Note: In this example, the 'database-init and 'message-broker-init containers simply print a message. You can replace these with actual initialization scripts or commands relevant to your specific database and message broker services.
NEW QUESTION # 242 
Context
You are tasked to create a secret and consume the secret in a pod using environment variables as follow:
Task
* Create a secret named another-secret with a key/value pair; key1/value4
* Start an nginx pod named nginx-secret using container image nginx, and add an environment variable exposing the value of the secret key key 1, using COOL_VARIABLE as the name for the environment variable inside the pod See the solution below.
Answer:
Explanation:
Solution:
NEW QUESTION # 243
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