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| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Logging and Runtime Security | 15% | - Runtime threat detection - Audit logging and monitoring |
| Minimizing Microservice Vulnerabilities | 20% | - Pod security standards - Container isolation and security contexts |
| System Hardening | 15% | - Host security controls - Kernel and node security configuration |
| Cluster Setup | 15% | - Secure installation configuration - Hardening cluster components |
| Supply Chain Security | 20% | - Image scanning and verification - Secure CI/CD practices |
| Cluster Hardening | 15% | - API server security - Authentication and authorization |
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NEW QUESTION # 51
Your Kubernetes cluster iS running a web application that requires access to a database hosted on an external Cloud provider. Describe how you can secure the connection between the application and the database using TLS/SSL encryption and identity-based authentication.
Answer:
Explanation:
Solution (Step by Step) :
1. Configure TLS/SSL Encryption:
- Generate Certificate: Obtain a TLS/SSL certificate from a trusted certificate authority (CA) or use a self-signed certificate for development purposes-
- Install Certificate on Database Server: Install the certificate on the database server, making it available to the database service.
- Configure Database Service: Configure the database service to accept connections only over TLS/SSL.
- Configure Application Container:
- Mount Certificate: Mount the TLS/SSL certificate into the application container as a secret.
- Configure Application Code: Update the application code to use the certificate when connecting to the database.
2. Implement Identity-Based Authentication:
- Create Database User: Create a dedicated database user specifically for the web application.
- Grant Permissions: Grant appropriate permissions to the database user, limiting access to the necessary tables and data.
- Use Authentication Plugin: Configure the database service to use an authentication plugin that supports identity-based authentication.
- Generate Database Credentials: Generate database credentials (usemame and password) for the application.
- Store Credentials Secretly: Store the database credentials securely as a Kubernetes secret.
- Access Credentials from Application: Configure the application to access the database credentials from the secret.
3. Connect Application to Database:
- Configure Connection String: Update the application's connection string to use TLS/SSL and the database user credentials.
- Example Connection String:
jdbc:postgresql://database-host:5432/database-name?ssl=true&sslmode=require&user=app user&password=app-password
4. Security Considerations:
- Certificate Validation: Ensure the certificate is validated by the application to prevent man-in-the-middle attacks.
- Secure Credential Management: Implement strong security measures to protect the database credentials stored as secrets.
- Access Control: Limit access to the database to only authorized users and applications.
- Network Isolatiom Consider using network policies to isolate the web application from other workloads and restrict unnecessary network traffic.
NEW QUESTION # 52
You have a Kubernetes cluster running a critical application with multiple deployments. You need to ensure that only authorized users can access the application's configuration files stored in ConfigMaps.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a ROE for ConngMap Access:
- Create a Role YAML file named 'configmap-reader.yaml' to grant read-only access to ConfigMaps:
2. Create a RoIeBinding to Assign the Role: - Create a RoleBinding YAML file named 'configmap-reader-binding.yaml' to bind the 'configmap-reader' role to a specific user or group:
3. Apply the Role and RoleBinding: - Apply the YAML files using kubectl apply -f configmap-reader.yaml configmap-reader-binding.yaml 4. Create a ConfigMap: - Create a ConfigMap named 'app-config' that contains sensitive configuration information:
5. Verify Access Restrictions: - Log in as the 'authorized-user and try accessing the 'app-config' ConfigMap using 'kubectl get configmap app-config' _ You should be able to view the ContigMap data. - Log in as a different user who does not have the 'configmap-reader' role assigned. Try accessing the 'app-config' ConfigMap. You should not be able to access it.
NEW QUESTION # 53
You are running a Kubernetes cluster with several sensitive applications. You need to restrict access to the cluster from external sources to only the IP addresses of your development team's laptops. HOW can you implement this using Network Policies?
Answer:
Explanation:
Solution (Step by Step) :
1. Define Network Policy: Create a NetworkPolicy YAML file named 'restrict-external-access.yaml
- Replace with the namespace where your sensitive applications are deployed. - Replace with the IP range of your development team's laptops. For example, '192.168.1.0/24' or a specific set of IP addresses. 2. Apply Network Policy: use 'kubectl' to apply the NetworkPolicy to your Kubernetes cluster. bash kubectl apply -f restrict-external-access-yaml 3. Verify Network Policy: Verify the NetworkPolicy is applied correctly: bash kubectl get networkpolicies -n You should see the 'restrict-external-access NetworkPolicy listed. 4. Test Access: Try accessing the cluster from an external IP address outside of the defined range. You should be blocked. Access from within the defined IP range should be allowed. This NetworkP01icy restricts ingress traffic to pods Within the specified namespace. It allows connections from the specified IP range C') and blocks all other external connections. Important Note: Ensure your firewall and other network security measures are properly configured to work in conjunction with the NetworkPolicy.
NEW QUESTION # 54
You nave a Kubernetes cluster with a Deployment named 'web-app- that runs multiple replicas of a web application. You need to create a network policy that allows only traffic from pods in the same namespace to access the web application's API endpoint on port 8080.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkP01icy:
- Define a NetworkPoIicy resource with a 'podSeIector that matches the 'web-app' Deployment.
- Create an 'ingress' rule that allows traffic from pods within the same namespace.
- Use the 'from' field to specify the namespace and set the 'namespaceselector' to 'matchLabels: {}' to include all pods in the namespace.
- Ensure that the port 8080 is included in the 'ports' field.
2. Apply the NetworkPolicy: - Apply the YAML file using 'kubectl apply -f web-app-namespace-policy.yaml 3. Verify the NetworkPoIicy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use 'kubectl describe networkpolicy web-app-namespace-policy' to view the details of the applied policy. 4. Test the NetworkPolicy: - Deploy a pod in the same namespace as the 'web-app' Deployment and attempt to access the API endpoint Verify that the connection is successful. - Deploy a pod in a different namespace and attempt to access the API endpoint Verity that the connection is denied.
NEW QUESTION # 55
Context
This cluster uses containerd as CRI runtime.
Containerd's default runtime handler is runc. Containerd has been prepared to support an additional runtime handler, runsc (gVisor).
Task
Create a RuntimeClass named sandboxed using the prepared runtime handler named runsc.
Update all Pods in the namespace server to run on gVisor.
Answer:
Explanation:
NEW QUESTION # 56
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