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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Minimize Microservice Vulnerabilities | 20% | - Isolation & multi-tenancy - Pod Security Standards - Secret management - OPA/Gatekeeper implementation - Security contexts |
| Topic 2: Cluster Setup | 15% | - Network security policies - Secure Ingress configuration - Binary verification - Node metadata protection - CIS benchmark compliance |
| Topic 3: System Hardening | 10% | - Minimize OS attack surface - Kernel hardening (AppArmor, seccomp) - Network access control - Least privilege IAM |
| Topic 4: Supply Chain Security | 20% | - SBOM & CI/CD security - Permitted registries - Signed artifacts & verification - Image security & scanning - Static analysis tools |
| Topic 5: Monitoring, Logging and Runtime Security | 20% | - Container immutability - Threat detection (Falco) - Behavioral analytics - Audit log configuration - Incident investigation |
| Topic 6: Cluster Hardening | 15% | - API access restriction - Service account security - RBAC configuration - Component updates & vulnerability mitigation |
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NEW QUESTION # 25
You're working on a Kubernetes cluster where container images are pulled from a private registry. Security best practices dictate that you should configure the cluster to only allow image pulls from authorized registries. Explain how you would enforce this policy using image admission controllers and provide a practical example of an admission control configuration.
Answer:
Explanation:
Solution (Step by Step) :
1. Enable Image Admission Controller:
- Install the Admission Controller. The 'ImagePolicyWebhook' admission controller enforces policies on container images. You can install it as part of your Kubernetes deployment or using a Helm chart.
2. Create a Policy Configuration:
- Define the Policy: Use a YAML file to define the rules for the admission controller. This policy will specify the allowed registries.
- Example Policy Configuration:
3. Configure the Service: - Create a Service: Create a Kubernetes service that exposes the admission controllers endpoint. - Example Service Configuration:
4. Deploy the Policy Engine: - Create a Deployment: Create a Kubernetes deployment to run the policy engine (e.g., a container image with the admission controller logic). - Example Deployment Configuration:
5. Verify the Configuration: - Test Image Pulls: Attempt to pull images from both authorized and unauthorized registries. - Monitor tor Policy Enforcement: Observe the admission controllers logs to confirm that it iS successtully blocking pulls from unauthorized registries. - Validate Security: Ensure that the policy effectively prevents the use of unauthorized container image sources, enhancing the clusters security posture.
NEW QUESTION # 26
You're designing a security policy for your Kubernetes cluster to restrict container image sources. You want to allow only images from your private registry and a few trusted public registries. How would you implement this policy using Admission Webhooks and what kind of validation logic would you implement in the webhook?
Answer:
Explanation:
Solution (Step by Step) :
1. Create Admission Webhook:
- Define a Kubernetes Admission Webhook that will intercept requests to create or modify pods.
- You'll need to create a webhook configuration and a service that will handle the validation logic-
- Example webhook configuration:
2. Implement Validation Logic (Service): - Create a service that will handle the webhook requests. This service should contain your validation logic. - The validation logic should check the container images used in the pod definitions. - Sample validation logic (Python using Flask, but you could use any language/framework): python from flask import Flask, request, jsonity import json
3. Deploy Service and Webhook: - Deploy your service and the webhook configuration. - Ensure that your service is accessible by the Kubernetes API server. 4. Test: - Create or update a pod with a container image from an allowed source. The webhook should allow it. - Create a pod with a container image from a disallowed source. The webhook should deny it.
NEW QUESTION # 27
You are working on a Kubernetes cluster with multiple teams developing and deploying applications. How would you establish a secure. supply chain process that ensures all deployed images are scanned for vulnerabilities and comply with security best practices?
Answer:
Explanation:
Solution (Step by Step) :
1. Centralized Image Registry:
- Establish a centralized image registry to act as the single source of truth for all container images.
- Use a registry like Docker Hub, Harbor, or Google Container Registry (GCR), depending on your organization's needs.
2. Image Scanning Integration:
- Integrate a container image vulnerability scanner into your CI/CD pipelines.
- Utilize tools like Aqua Security, JFrog Xray, or Anchore Engine.
- Configure the scanner to run automatically during image builds and before pushing to the registry.
3. Automated Policy Enforcement:
- Implement Kubernetes policies (like Admission Controllers) to enforce security best practices.
- Define rules that block the deployment of images with:
- Unacceptable vulnerability levels (based on CVSS score or severity)
- Missing security scans (e.g., images without a "scanned" tag)
- Unauthorized image sources (restricting deployments to images from the centralized registry)
4. Image Signing:
- Implement image signing to add an extra layer of security.
- Use a trusted key to sign images in the registry.
- Configure Kubernetes to only allow images signed with the trusted key to be deployed.
- This helps prevent tampering or unauthorized modifications to images.
5. Access Control and Role-Based Access Control (RBAC):
- Implement strong access control mechanisms to limit who has access to the image registry and the Kubernetes cluster.
- Use RBAC to grant different teams specific permissions based on their responsibilities.
- For example, developers might have access to build images and push them to the registry, while deployment teams might have access to pull
images and deploy them to the cluster.
6. Security Best Practices Training:
- Educate development teams on container security best practices, such as:
- Using minimal base images
- Avoiding unnecessary dependencies
- Employing security tools like linters and analyzers
- Following secure coding practices
- Regularly review and update policies and procedures to reflect evolving security threats and industry best practices.
7. Auditing and Monitoring:
- Implement auditing and monitoring to track all image pulls, deployments, and any potential security issues.
- Use logs, security dashboards, and monitoring tools to identify and address anomalies or security breaches.
8. Continuous Improvement:
- Establish a continuous improvement process to review and refine your secure supply chain procedures.
- Regularly assess your security posture, identity areas for improvement, and implement changes to enhance your overall security.
These steps help you establish a comprehensive secure supply chain process across your Kubernetes cluster, ensuring all deployed images are scanned tor vulnerabilities, comply with security best practices, and contribute to the overall security posture of your application.
NEW QUESTION # 28
SIMULATION
Service is running on port 389 inside the system, find the process-id of the process, and stores the names of all the open-files inside the /candidate/KH77539/files.txt, and also delete the binary.
Answer: A
NEW QUESTION # 29
A container image scanner is set up on the cluster.
Given an incomplete configuration in the directory
/etc/kubernetes/confcontrol and a functional container image scanner with HTTPS endpoint https://test-server.local.8081/image_policy
1. Enable the admission plugin.
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as latest.
Answer:
Explanation:
ssh-add ~/.ssh/tempprivate
eval "$(ssh-agent -s)"
cd contrib/terraform/aws
vi terraform.tfvars
terraform init
terraform apply -var-file=credentials.tfvars
ansible-playbook -i ./inventory/hosts ./cluster.yml -e ansible_ssh_user=core -e bootstrap_os=coreos -b --become-user=root --flush-cache -e ansible_user=core
NEW QUESTION # 30
......
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