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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Certified Kubernetes Security Specialist (CKS) Exam |
| Exam Number: | CKS |
| Passing Score: | Not publicly disclosed |
| Related Certifications: | Certified Kubernetes Application Developer (CKAD) Certified Kubernetes Administrator (CKA) |
| Available Languages: | English |
| Exam Price: | USD 395 |
| Certificate Validity Period: | 2 years |
| Real Exam Qty: | Performance-based tasks (no fixed number) |
| Exam Format: | Performance-based exam, Hands-on lab (Kubernetes environment), Terminal-based tasks |
| Exam Duration: | 120 minutes |
| 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 Exam covers a wide range of topics related to Kubernetes security, including authentication and authorization, network policies, cluster hardening, and vulnerability management. CKS exam is challenging and requires a solid understanding of Kubernetes architecture, network security, and Linux administration. Certified Kubernetes Security Specialist (CKS) certification is highly valued in the industry and is recognized as a standard for Kubernetes security professionals.
NEW QUESTION # 49
You are managing a Kubernetes cluster that uses a private Docker registry for storing container images. You need to secure the registry by restricting access to authorized users and teams. Design a solution using role-based access control (RBAC) to enforce the following policies:
- Developers in the "dev" team should be allowed to push and pull images to the registry.
- Operations team members should only be allowed to pull images.
- Security team members should have read-only access to the registry's metadata
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Service Account for each team:
- Dev Team:
- Operations Team:
- Security Team:
- Apply these ServiceAccount YAML files to the cluster using 'kubectl apply -f sa.yaml'. 2. Create a Role for each team: - Dev Team Role:
- Operations Team Role:
- Security Team Role:
- Apply these Role YAML files to the cluster using 'kubectl apply -f roles-yaml'. 3. Bind the Roles to Service Accounts: - Dev Team:
- Operations Team:
- security Team:
- Apply these RoleBinding YAML files to the cluster using 'kubectl apply -f rolebindings.yamr 4. Configure the Registry: - Ensure that your private Docker registry is configured to authenticate users and teams based on the specified RBAC rules. This may involve using a registry-specific Plugin or configuration file. 5. Test the Setup: - Use the created Service Accounts to access the registry. - Verify that each team nas the expected permissions and limitations. - For example, try pushing an image using the 'dev-sa' account and verify it is successful. Then, attempt to push an image using the Sops-sa- account and verify it is unsuccessful due to the missing permission.
NEW QUESTION # 50
Context: Cluster: gvisor Master node: master1 Worker node: worker1
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context gvisor
Context: This cluster has been prepared to support runtime handler, runsc as well as traditional one.
Task: Create a RuntimeClass named not-trusted using the prepared runtime handler names runsc. Update all Pods in the namespace server to run on newruntime.
Answer:
Explanation:
Explanation
[desk@cli] $vim runtime.yaml
apiVersion: node.k8s.io/v1
kind: RuntimeClass
metadata:
name: not-trusted
handler: runsc
[desk@cli] $ k apply -f runtime.yaml [desk@cli] $ k get pods
NAME READY STATUS RESTARTS AGE
nginx-6798fc88e8-chp6r 1/1 Running 0 11m
nginx-6798fc88e8-fs53n 1/1 Running 0 11m
nginx-6798fc88e8-ndved 1/1 Running 0 11m
[desk@cli] $ k get deploy
NAME READY UP-TO-DATE AVAILABLE AGE
nginx 3/3 11 3 5m
[desk@cli] $ k edit deploy nginx
NEW QUESTION # 51
You have a Kubernetes cluster running an application with multiple deployments. You want to implement RBAC rules to ensure that only specific users can manage the deployments belonging to their respective teams. For instance, the "dev" team should only be able to manage deployments With the label 'team: dev' , while the "ops" team should only manage deployments With the label steam: 'ops'.
Answer:
Explanation:
Solution (Step by Step) :
1. Create Role for Each Team:
- dev-role.yaml:
- ops-role_yaml:
2. Create RoleBindings for Each Team: - dev-rolebinding.yaml:
- ops-rolebinding.yaml:
3. Apply the Roles and RoleBindings: - Apply the YAML files using kubectl apply -f dev-role.yaml dev-rolebinding.yaml ops-role.yaml ops-rolebinding.yamr 4. Create Test Deployments (with Team Labels): - Create a deployment labeled with steam: devs and another labeled with 'team: ops'. You can use 'kubectl create deployment with the appropriate label. 5. Verify RBAC Permissions: - Log in as the "dev" user and attempt to manage the "dev" team deployment. - Log in as the "ops" user and attempt to manage the "ops" team deployment - The users should only be able to access the deployments belonging to their respective teams.
NEW QUESTION # 52
You are managing a Kubernetes cluster With several applications running within pods. Your security policy mandates that all pods should run with the 'privileged' flag set to 'false' , while allowing a few pods to run with privileged access for specific tasks. How would you implement this policy by leveraging the Kubernetes security best practices?
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Security Context Constraint (SCC): Create a new SCC named 'non-privileged-sce with the following configuration:
- 'allowPrivilegeEscalation': 'false' (Prevents pods from elevating privileges even if they run with privileged containers)
- 'privileged': 'false' (Disallows containers from running with privileged access)
- 'runAsLJser': ' 1000' (Assigns a specific non-root user ID for containers)
- 'readOnlyRootFilesystem': 'true' (Prevents containers from modifying the host's root filesystem)
- 'seccompProfile': 'localhost/unconfined' (Specifies a seccomp profile for restricting system calls)
2. Apply the SCC: Apply the SCC using 'kuoectl apply -f non-privileged-scc.yaml 3. Create a Second SCC for Privileged Pods: Create a new SCC named 'privileged-sce with the following configuratiom - 'allowPrivilegeEscalation': 'trues - 'privileged': 'true' - 'runAsuser': - 'readOnlyRootFilesystem': 'false' - 'seccompprofile': 'localhost/unconfined'
4. Apply the Privileged SCC: Apply the SCC using 'kubectl apply -f privileged-scc.yaml 5. Update Your Deployment Configurations: - For deployments requiring privileged access, include 'securityContext.securityContextConstraints: privileged-sce within the pod specification. - For all other deployments, include 'securityContext.securityContextConstraints: non-prjvileged-scc' within the pod specification.
6. Restrict Access to SCCs: You can funer enhance security by configuring which users or service accounts can use each SCC. This can be done by using Role-Based Access Control (RBAC) to grant permissions to specific user accounts or service accounts for the SCCs.
This approach ensures that the majority of pods operate with minimal privileges, enhancing security, while allowing a few essential deployments to run with elevated access. Remember to constantly review and update your security policies as your cluster and applications evolve.
NEW QUESTION # 53
You need to configure a Kubernetes cluster to use a pod security policy (PSP) that restricts the use of privileged containers and specific capabilities. You want to only allow specific pods in the 'production' namespace to run With the 'NET_ADMIN' capability.
Answer:
Explanation:
Solution (Step by Step) :
1. create a PSPI
- Define a PSP that restricts the use of privileged containers and capabilities, except for the capability for pods in the 'production' namespace.
2. Create a PSP Binding: - Bind the PSP to the 'production' namespace-
3. Create a Pod: - Create a Pod in the 'production' namespace and specify the 'securitycontext' with the 'NET_ADMIN' capability.
4. Apply the YAML files: - Apply the created YAML files using 'kubectl apply -f 5. Verify the permissions: - Try to create a Pod in other namespaces with the 'NET_ADMIN' capability. It should be rejected.
NEW QUESTION # 54
......
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