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| Section | Weight | Objectives |
|---|---|---|
| Cluster Hardening | 15% | - Authentication and authorization - API server security |
| Monitoring, Logging and Runtime Security | 15% | - Audit logging and monitoring - Runtime threat detection |
| Cluster Setup | 15% | - Secure installation configuration - Hardening cluster components |
| Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
| Supply Chain Security | 20% | - Image scanning and verification - Secure CI/CD practices |
| System Hardening | 15% | - Host security controls - Kernel and node security configuration |
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NEW QUESTION # 30
SIMULATION
Create a RuntimeClass named gvisor-rc using the prepared runtime handler named runsc.
Create a Pods of image Nginx in the Namespace server to run on the gVisor runtime class
Answer:
Explanation:
Install the Runtime Class for gVisor
{ # Step 1: Install a RuntimeClass
cat <<EOF | kubectl apply -f -
apiVersion: node.k8s.io/v1beta1
kind: RuntimeClass
metadata:
name: gvisor
handler: runsc
EOF
}
Create a Pod with the gVisor Runtime Class
{ # Step 2: Create a pod
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: nginx-gvisor
spec:
runtimeClassName: gvisor
containers:
- name: nginx
image: nginx
EOF
}
Verify that the Pod is running
{ # Step 3: Get the pod
kubectl get pod nginx-gvisor -o wide
}
NEW QUESTION # 31
Create a network policy named restrict-np to restrict to pod nginx-test running in namespace testing.
Only allow the following Pods to connect to Pod nginx-test:-
1. pods in the namespace default
2. pods with label version:v1 in any namespace.
Make sure to apply the network policy.
Answer: A
NEW QUESTION # 32
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context dev
A default-deny NetworkPolicy avoid to accidentally expose a Pod in a namespace that doesn't have any other NetworkPolicy defined.
Task: Create a new default-deny NetworkPolicy named deny-network in the namespace test for all traffic of type Ingress + Egress The new NetworkPolicy must deny all Ingress + Egress traffic in the namespace test.
Apply the newly created default-deny NetworkPolicy to all Pods running in namespace test.
You can find a skeleton manifests file at /home/cert_masters/network-policy.yaml
Answer:
Explanation:
See the Explanation below
Explanation:
master1 $ k get pods -n test --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
$ vim netpol.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol.yaml
Explanation:
controlplane $ k get pods -n test --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
master1 $ vim netpol1.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol1.yaml
Reference:
https://kubernetes.io/docs/concepts/services-networking/network-policies/ Explanation:
controlplane $ k get pods -n test --show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
master1 $ vim netpol1.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
master1 $ k apply -f netpol1.yaml
https://kubernetes.io/docs/concepts/services-networking/network-policies/
NEW QUESTION # 33
Use the kubesec docker images to scan the given YAML manifest, edit and apply the advised changes, and passed with a score of 4 points.
kubesec-test.yaml
apiVersion: v1
kind: Pod
metadata:
name: kubesec-demo
spec:
containers:
- name: kubesec-demo
image: gcr.io/google-samples/node-hello:1.0
securityContext:
readOnlyRootFilesystem: true
Answer: A
NEW QUESTION # 34
You are tasked with securing a Kubernetes cluster that runs a critical web application. The cluster iS deployed on AWS and uses a custom API server for authentication You are required to implement a security strategy that enforces strong authentication and authorization for accessing the Kubernetes API, while also minimizing the attack surface.
Answer:
Explanation:
Solution (Step by Step) :
1. configure RBAC:
- Define fine-grained Role-Based Access Control (RBAC) rules to restrict access to specific resources and actions based on user roles and permissions.
- Create roles and role bindings for different user groups, such as developers, operators, and security auditors.
- Example:
2. Enable TLS and Mutual TLS: - Configure the Kubernetes API server to use TLS for secure communication between the server and clients. - Implement Mutual TLS (mTLS) to enforce authentication for all API requests. - Example:
3. Configure API Server Authentication - Implement custom authentication mechanisms using plugins or external services to authenticate API requests. - Example:
4. Limit Access to Kubernetes API: - Configure network policies to restrict access to the Kubernetes API server from unauthorized sources. - Example:
5. Monitor and Audit API Activity: - Use audit logs to track API requests and identify potential security threats. - Example:
6. Use Security Best Practices: - Implement CIS Kubernetes Benchmark guidelines for configuring the Kubernetes cluster securely. - Example: - Enable strong password policies for all user accounts. - Restrict access to sensitive configuration files. - Regularly update the Kubernetes cluster and its components. 7. Implement a Secure Container Image Policy: - Implement a strict container image policy to ensure that only trusted images are deployed in the cluster. - Example: - Scan container images for vulnerabilities. - Require images to be signed by trusted parties. - Configure image signature verificatiom 8. Secure Kubernetes Secrets and Configuration: - Store sensitive data, such as passwords and API keys, in secrets. - Use secret management tools to securely access and rotate secrets. - Example: - Use Kubernetes Secrets to store credentials. - Implement a secret rotation policy. 9. Use Security Monitoring and Threat Detection Tools: - Deploy security monitoring and threat detection tools to identifry and respond to security incidents. - Example: - Integrate with a SIEM solution. - Use security tools like Falco to monitor for malicious activities. - Implement a security automation and response framework. 10. Regularly Review and Update Security Configuration: - Conduct periodic security audits and reviews to assess the effectiveness of security controls. - Keep security policies and procedures updated to address evolving threats. By implementing these security best practices, you can create a secure and resilient Kubernetes cluster for your critical web application.
NEW QUESTION # 35
......
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