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| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Logging and Runtime Security | 15% | - Runtime threat detection - Audit logging and monitoring |
| System Hardening | 15% | - Kernel and node security configuration - Host security controls |
| Supply Chain Security | 20% | - Secure CI/CD practices - Image scanning and verification |
| Cluster Hardening | 15% | - API server security - Authentication and authorization |
| Cluster Setup | 15% | - Hardening cluster components - Secure installation configuration |
| Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
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NEW QUESTION # 42
You have a Kubernetes cluster witn a Deployment named 'my-app' that runs multiple replicas of an application. The application exposes an API endpoint on port 8080- You need to configure a network policy that allows only specific IP addresses to access this endpoint.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Network Policy:
- Define a NetworkPoIicy resource with a 'podSeIector targeting the 'my-app' Deployment
- Specify an 'ingress' rule that allows traffic from the allowed IP addresses.
- Use the 'from' field to specify the source IP addresses. You can either provide individual IP addresses or CIDR ranges.
- Ensure that the port 8080 is allowed in the 'ports field.
2. Apply the Network Policy: - Apply the YAML file using 'kubectl apply -f my-app-network-policy.yamr 3. Verify the Network Policy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use kubectl describe networkpolicy my-app-network-policy' to view the details of the applied policy. 4. Test the Network Policy: - Attempt to access the API endpoint from an allowed IP address and verify that the connection is successful. - Attempt to access the API endpoint from a blocked IP address and verity that the connection is denied.
NEW QUESTION # 43
You have a Pod that runs an application that accesses a database service running in a different namespace. You want to enforce a rule that only allows the pod to connect to the database service on a specific port. Explain how to achieve this using NetworkPolicy.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Create a ' NetworkPoIicV resource that defines the rules for the pod.
- This example allows the pod to connect to the database service on port 5432 in the 'database-namespace namespace.
2. Apply the NetworkPolicy: - Apply the 'NetworkPolicy' using 'kubectl apply -f database-access-policy.yaml 3. Verify the Policy: - Run the application in the pod and attempt to connect to the database service on the specified port- - Verify that the connection is successful. - Attempt to connect to the database service on a different port or from a different namespace. - Verity that these attempts are blocked.
NEW QUESTION # 44
Given an existing Pod named nginx-pod running in the namespace test-system, fetch the service-account-name used and put the content in /candidate/KSC00124.txt Create a new Role named dev-test-role in the namespace test-system, which can perform update operations, on resources of type namespaces.
Answer: A
NEW QUESTION # 45
SIMULATION
Documentation Deployments, Pods, bom Command Help bom-help
You must connect to the correct host. Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000035
Task
The alpine Deployment in the alpine namespace has three containers that run different versions of the alpine image.
First, find out which version of the alpine image contains the libcrypto3 package at version 3.1.4-r5.
Next, use the pre-installed bom tool to create an SPDX document for the identified image version at /home/candidate/alpine.spdx.
You can find the bom tool documentation at bom.
Finally, update the alpine Deployment and remove the container that uses the idenfied image version.
The Deployment's manifest file can be found at /home/candidate/alpine-deployment.yaml.
Do not modify any other containers of the Deployment.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
1) Connect to the correct host
ssh cks000035
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) List the 3 container names + images in the Deployment
kubectl -n alpine get deploy alpine -o jsonpath='{range .spec.template.spec.containers[*]}{.name}{"\t"}{.image}{"\n"}{end}' You'll get 3 lines like:
c1 alpine:3.xx
c2 alpine:3.yy
c3 alpine:3.zz
3) Identify which alpine image has libcrypto3 at 3.1.4-r5
Fastest reliable method (since it's Alpine, just query apk inside each image):
Run these one-by-one for each image you saw in step 2:
docker run --rm <ALPINE_IMAGE_1> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1' docker run --rm <ALPINE_IMAGE_2> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1' docker run --rm <ALPINE_IMAGE_3> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1'
✅ The correct image is the one that prints exactly:
libcrypto3-3.1.4-r5
Note that full image tag, e.g.:
IMG=alpine:3.xx
4) Create SPDX document with bom for that identified image
(Use the identified image from step 3.)
bom generate --image $IMG --format spdx --output /home/candidate/alpine.spdx Verify file exists:
ls -l /home/candidate/alpine.spdx
5) Remove ONLY the container that uses that image version
The manifest to edit is:
vi /home/candidate/alpine-deployment.yaml
In the spec.template.spec.containers: list, find the container entry whose image: equals the identified $IMG, and delete that one container block only (name/image/ports/etc for that container).
Save:
:wq
6) Apply the updated Deployment (do not change other containers)
kubectl apply -f /home/candidate/alpine-deployment.yaml
Wait rollout:
kubectl -n alpine rollout status deployment/alpine
7) Verify only 2 containers remain
kubectl -n alpine get deploy alpine -o jsonpath='{range .spec.template.spec.containers[*]}{.name}{"\t"}{.image}{"\n"}{end}' You should now see 2 lines, and the $IMG line should be gone.
If bom generate ... errors (quick fix)
Check exact syntax on that system:
bom --help
bom generate --help
Then rerun with the flags it expects, keeping:
image = $IMG
output = /home/candidate/alpine.spdx
format = spdx
NEW QUESTION # 46
You are tasked with securing a Kubernetes cluster running kube-dns. You need to enforce the CIS Kubernetes Benchmark recommendations for kube-dns. One of the key recommendations is to disable the '-bind-address-0.0.0.0' parameter from the kube-dns deployment. This parameter allows kube-dns to listen on all network interfaces, potentially exposing the DNS service to unwanted access. How would you achieve this using a ConfigMap?
Answer:
Explanation:
Solution (Step by Step) :
1. Create a ConfigMap: Create a ConfigMap named 'kube-dns-config' containing the updated configuration for kube-dns. This ConfigMap will replace the default kube-dns configuration.
2 Apply the ConfigMap: Apply the ConfigMap to the cluster using 'kubectl apply -f kube-dns-config-yaml'. This will create the ConfigMap and update the kube-dns deployment. 3. Verify the Deployment: Verify that the kube-dns deployment has been updated with the new configuration. Use 'kubectl get deployment kube-dns -o yaml' to see the deployment configuration, and Check tor the "-bind-address=127.O.O.1 ' parameter in the container's command. 4. Restart the kube-dns Pods: Restart the kube-dns pods to ensure the changes take effect This can be done using the 'kubectl rollout restart deployment kube-dns' command. This change will ensure that kube-dns is only listening on the localhost interface (127.0.0.1), mitigating the risk of unauthorized access.
NEW QUESTION # 47
......
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