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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Security Specialist (CKS) Exam |
| Exam Number: | CKS |
| Exam Format: | Performance-based exam, Terminal-based tasks, Hands-on lab (Kubernetes environment) |
| Real Exam Qty: | Performance-based tasks (no fixed number) |
| Exam Duration: | 120 minutes |
| Certificate Validity Period: | 2 years |
| Available Languages: | English |
| Related Certifications: | Certified Kubernetes Administrator (CKA) Certified Kubernetes Application Developer (CKAD) |
| Passing Score: | Not publicly disclosed |
| Exam Price: | USD 395 |
| Recommended Training: | CKS Exam Preparation Course Kubernetes Security Essentials (Linux Foundation Training) |
| Exam Registration: | Linux Foundation Certification Page Linux Foundation Candidate Handbook |
| Sample Questions: | Linux Foundation CKS Sample Questions |
| Exam Way: | Online, proctored, remote performance-based exam |
| Pre Condition: | Valid Certified Kubernetes Administrator (CKA) certification is required |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/certified-kubernetes-security-specialist/ |
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The CKS certification exam is designed to test the candidate's Kubernetes security expertise in a real-world scenario. CKS exam is conducted online and consists of multiple-choice questions, performance-based tasks, and hands-on labs. CKS exam covers a wide range of topics including Kubernetes cluster setup, network policies, pod security policies, node security, container security, and RBAC (Role-Based Access Control). The CKS Exam is a challenging exam that requires a deep understanding of Kubernetes security concepts and best practices. However, passing the exam is a great accomplishment that can help IT professionals advance their careers in the field of Kubernetes and container security.
NEW QUESTION # 29
Create a PSP that will only allow the persistentvolumeclaim as the volume type in the namespace restricted.
Create a new PodSecurityPolicy named prevent-volume-policy which prevents the pods which is having different volumes mount apart from persistentvolumeclaim.
Create a new ServiceAccount named psp-sa in the namespace restricted.
Create a new ClusterRole named psp-role, which uses the newly created Pod Security Policy prevent-volume-policy
Create a new ClusterRoleBinding named psp-role-binding, which binds the created ClusterRole psp-role to the created SA psp-sa.
Hint:
Also, Check the Configuration is working or not by trying to Mount a Secret in the pod maifest, it should get failed.
POD Manifest:
apiVersion: v1
kind: Pod
metadata:
name:
spec:
containers:
- name:
image:
volumeMounts:
- name:
mountPath:
volumes:
- name:
secret:
secretName:
Answer:
Explanation:
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: restricted
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: 'docker/default,runtime/default' apparmor.security.beta.kubernetes.io/allowedProfileNames: 'runtime/default' seccomp.security.alpha.kubernetes.io/defaultProfileName: 'runtime/default' apparmor.security.beta.kubernetes.io/defaultProfileName: 'runtime/default' spec:
privileged: false
# Required to prevent escalations to root.
allowPrivilegeEscalation: false
# This is redundant with non-root + disallow privilege escalation,
# but we can provide it for defense in depth.
requiredDropCapabilities:
- ALL
# Allow core volume types.
volumes:
- 'configMap'
- 'emptyDir'
- 'projected'
- 'secret'
- 'downwardAPI'
# Assume that persistentVolumes set up by the cluster admin are safe to use.
- 'persistentVolumeClaim'
hostNetwork: false
hostIPC: false
hostPID: false
runAsUser:
# Require the container to run without root privileges.
rule: 'MustRunAsNonRoot'
seLinux:
# This policy assumes the nodes are using AppArmor rather than SELinux.
rule: 'RunAsAny'
supplementalGroups:
rule: 'MustRunAs'
ranges:
# Forbid adding the root group.
- min: 1
max: 65535
fsGroup:
rule: 'MustRunAs'
ranges:
# Forbid adding the root group.
- min: 1
max: 65535
readOnlyRootFilesystem: false
NEW QUESTION # 30
Cluster: dev
Master node: master1
Worker node: worker1
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context dev
Task:
Retrieve the content of the existing secret named adam in the safe namespace.
Store the username field in a file names /home/cert-masters/username.txt, and the password field in a file named /home/cert-masters/password.txt.
1. You must create both files; they don't exist yet.
2. Do not use/modify the created files in the following steps, create new temporary files if needed.
Create a new secret names newsecret in the safe namespace, with the following content:
Username: dbadmin
Password: moresecurepas
Finally, create a new Pod that has access to the secret newsecret via a volume:
Namespace: safe
Pod name: mysecret-pod
Container name: db-container
Image: redis
Volume name: secret-vol
Mount path: /etc/mysecret
Answer:
Explanation:
1. Get the secret, decrypt it & save in files
k get secret adam -n safe -o yaml
2. Create new secret using --from-literal
[desk@cli] $k create secret generic newsecret -n safe --from-literal=username=dbadmin --from-literal=password=moresecurepass
3. Mount it as volume of db-container of mysecret-pod
Explanation
[desk@cli] $k create secret generic newsecret -n safe --from-literal=username=dbadmin --from-literal=password=moresecurepass secret/newsecret created
[desk@cli] $vim /home/certs_masters/secret-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: mysecret-pod
namespace: safe
labels:
run: mysecret-pod
spec:
containers:
- name: db-container
image: redis
volumeMounts:
- name: secret-vol
mountPath: /etc/mysecret
readOnly: true
volumes:
- name: secret-vol
secret:
secretName: newsecret
[desk@cli] $ k apply -f /home/certs_masters/secret-pod.yaml
pod/mysecret-pod created
[desk@cli] $ k exec -it mysecret-pod -n safe - cat /etc/mysecret/username dbadmin
[desk@cli] $ k exec -it mysecret-pod -n safe - cat /etc/mysecret/password moresecurepas
NEW QUESTION # 31
You need to implement a secure network policy that allows communication only between specific pods within a namespace. For example, you want to allow communication between pods that have the label 'app=frontend' and pods that have the label 'app=backend', but block all other communication within the namespace.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Define a NetworkP01icy that allows communication between 'frontend' and 'backend' pods, but blocks other communication within the namespace.
2. Create a Frontend Pod: - Create a Pod with the label 'app=frontend'.
3. Create a Backend Pod: - Create a Pod With the label 'app=backend'.
4. Apply the YAML files: - Apply the created YAML files using ' kubectl apply -f 5. Verify the Network Policy: - Try to connect from the 'frontend-pod' to the 'backend-pod' (e.g., using ' kubectl exec -it frontend-pod bash' and 'curl backend-pod:80')- It should succeed. - Try to connect from the 'frontend-pod' to another pod in the namespace that doesn't have the Sapp-backend' label. This connection should be blocked.
NEW QUESTION # 32
SIMULATION
Context
Your organization's security policy includes:
ServiceAccounts must not automount API credentials
ServiceAccount names must end in "-sa"
The Pod specified in the manifest file /home/candidate/KSCH00301 /pod-m nifest.yaml fails to schedule because of an incorrectly specified ServiceAccount.
Complete the following tasks:
Task
1. Create a new ServiceAccount named frontend-sa in the existing namespace qa. Ensure the ServiceAccount does not automount API credentials.
2. Using the manifest file at /home/candidate/KSCH00301 /pod-manifest.yaml, create the Pod.
3. Finally, clean up any unused ServiceAccounts in namespace qa.
Answer:
Explanation:
See the Explanation below
Explanation:
NEW QUESTION # 33
You are managing a Kubernetes cluster where workloads are spread across multiple nodes- You want to configure Pod Security Policies PSPS to restrict the use of privileged containers and limit the ca abilities of containers running within your cluster.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Pod Security Policy:
- Create a PSP YAML file named restricted-psp.ya'r:
2. Apply the Pod Security Policy: - Apply the PSP using 'kubectl apply -f restricted-psp.yaml' 3. Create a Deployment using the PSP: - Create a new deployment YAML file named 'test-deployment.yamr that specifies the 'restricted-psp' for the pod's security context:
4. Apply the Deployment: - Apply the deployment using 'kubectl apply -f test-deployment.yaml 5. Test the Restrictions: - Try creating a pod that violates the PSP, for example, using a privileged container. The pod should fail to be created due to the PSP enforcement - Try running a command within a using the deployment that uses the PSP. You should be able to run commands but may have limitations based on the capabilities allowed by the PSP.
NEW QUESTION # 34
......
Related CKS Certifications: https://www.newpassleader.com/Linux-Foundation/CKS-exam-preparation-materials.html
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