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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Minimize Microservice Vulnerabilities | 20% | - Use OPA Gatekeeper to enforce security controls - Set appropriate security contexts for pods and containers - Understand the principle of immutable containers - Use PSP to enforce security controls - Configure network policies for namespace isolation - Use AppArmor or seccomp profiles to constrain container behavior |
| Topic 2: Cluster Setup | 10% | - Use Pod Security Policies to control security-related pod behaviors - Use Cis benchmarks to check Kubernetes cluster settings - Implement Pod-to-Pod encryption using mTLS or WireGuard - Use role-based access control (RBAC) to minimize exposure - Configure TLS certificates and minimum version for etcd - Understand the security implications of embedding cloud provider flags - Manage sensitive information in clusters |
| Topic 3: Monitoring, Logging, and Runtime Security | 20% | - Understand and monitor network traffic - Minimize the attack surface using container health indicators - Detect threats at the container level - Audit and detect logs and events for anomalies - Perform behavioral analytics to detect malicious activity - Falco - container security monitoring and threat detection |
| Topic 4: System Hardening | 15% | - Modify host components to improve security - Kernel defaults and parameters using sysctl - Enable audit logging - Understand the concept of OPA (Open Policy Agent) and Gatekeeper |
| Topic 5: Cluster Hardening | 15% | - Minimize admission of containers without seccomp profiles - Minimize admission of containers without AppArmor profile - Minimize admission of containers with hostPath volumes - Minimize admission of containers without a security context - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers with FlexVolume volumes - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of privileged containers - Minimize admission of containers with added capabilities - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers with raw block devices - Minimize admission of containers that allow host namespaces - Minimize admission of containers with capabilities assigned |
| Topic 6: Supply Chain Security | 20% | - Understand the software supply chain best practices - Understand the container build process - Sign container images and verify signatures - Understand image security scanning and its workflow - Use image admission controllers to prevent use of untrusted images - Minimize base image footprint - Use static analysis tools to detect vulnerabilities - Use distroless images for static workload |
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NEW QUESTION # 44
You are managing a Kubernetes cluster running an application that uses a private container registry. The registry is secured using basic authentication, but the credentials are stored in a secret in the cluster. You want to ensure that the application container can access the registry without storing the credentials directly within the container image.
How would you configure the application deployment to access the private registry securely without exposing the credentials?
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Secret:
- Create a secret that stores the registry username and password.
- Example:
2. Configure the Service Account - Create a service account tor the application. - Add the 'imagePullSecrets' field to the service account to reference the secret. - Example:
3. Update the Deployment: - Update the deployment YAML to use the service account. - Example:
4. Apply the Changes: - Apply the secret, service account, and updated deployment using 'kubectl apply -f commands.
NEW QUESTION # 45
SIMULATION
Documentation Deployments, Pods, bom Command Help bom-help
You must connect to the correct host. Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000035
Task
The alpine Deployment in the alpine namespace has three containers that run different versions of the alpine image.
First, find out which version of the alpine image contains the libcrypto3 package at version 3.1.4-r5.
Next, use the pre-installed bom tool to create an SPDX document for the identified image version at /home/candidate/alpine.spdx.
You can find the bom tool documentation at bom.
Finally, update the alpine Deployment and remove the container that uses the idenfied image version.
The Deployment's manifest file can be found at /home/candidate/alpine-deployment.yaml.
Do not modify any other containers of the Deployment.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
1) Connect to the correct host
ssh cks000035
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) List the 3 container names + images in the Deployment
kubectl -n alpine get deploy alpine -o jsonpath='{range .spec.template.spec.containers[*]}{.name}{"\t"}{.image}{"\n"}{end}' You'll get 3 lines like:
c1 alpine:3.xx
c2 alpine:3.yy
c3 alpine:3.zz
3) Identify which alpine image has libcrypto3 at 3.1.4-r5
Fastest reliable method (since it's Alpine, just query apk inside each image):
Run these one-by-one for each image you saw in step 2:
docker run --rm <ALPINE_IMAGE_1> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1' docker run --rm <ALPINE_IMAGE_2> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1' docker run --rm <ALPINE_IMAGE_3> sh -c 'apk info -v libcrypto3 2>/dev/null | head -n1'
✅ The correct image is the one that prints exactly:
libcrypto3-3.1.4-r5
Note that full image tag, e.g.:
IMG=alpine:3.xx
4) Create SPDX document with bom for that identified image
(Use the identified image from step 3.)
bom generate --image $IMG --format spdx --output /home/candidate/alpine.spdx Verify file exists:
ls -l /home/candidate/alpine.spdx
5) Remove ONLY the container that uses that image version
The manifest to edit is:
vi /home/candidate/alpine-deployment.yaml
In the spec.template.spec.containers: list, find the container entry whose image: equals the identified $IMG, and delete that one container block only (name/image/ports/etc for that container).
Save:
:wq
6) Apply the updated Deployment (do not change other containers)
kubectl apply -f /home/candidate/alpine-deployment.yaml
Wait rollout:
kubectl -n alpine rollout status deployment/alpine
7) Verify only 2 containers remain
kubectl -n alpine get deploy alpine -o jsonpath='{range .spec.template.spec.containers[*]}{.name}{"\t"}{.image}{"\n"}{end}' You should now see 2 lines, and the $IMG line should be gone.
If bom generate ... errors (quick fix)
Check exact syntax on that system:
bom --help
bom generate --help
Then rerun with the flags it expects, keeping:
image = $IMG
output = /home/candidate/alpine.spdx
format = spdx
NEW QUESTION # 46
You're tasked witn securing a Kubernetes cluster running on Google Kubernetes Engine (GKE). One of the key security objectives is to ensure that only authorized users can access the cluster's API server and that communication between components within the cluster is encrypted. You need to configure the clusters network policy and authentication mechanism to enforce these security controls. Explain step-by-step how you would configure GKE's network policies and authentication mechanisms to achieve these objectives.
Answer:
Explanation:
Solution (Step by Step) :
1. Configure Network Policies:
- Create Network Policies: use the 'kubectl' command to create network policies that define the communication rules between pods and services. For
example:
bash
kubectl apply -f network-policy-yaml
- Define Rules: Specify the rules in the network policy. For example:
- Apply Policy: Apply the policy using kubectl apply -f network-policy-yaml- 2. Configure Authentication: - Enable Service Account Authentication: Configure service accounts to access the API server. In GKE, you can enable service account authentication by creating a service account key. - Create Service Account Key: Create a service account key with the following command: bash gcloud iam service-accounts keys create service-account-key.json -jam-account service-account@project_iam_gserviceaccount.com - Restrict Access: Configure the service account's permissions to minimize the risk of unauthorized access. Use the IAM policy to grant the service account access only to the required resources. 3. Configure Encryption: - Enable HTTPS for the API Server: In GKE, the API server runs over HTTPS by default. Verify that this is enabled in your cluster configuration. - Configure TLS Certificates: Ensure that the API server uses a valid TLS certificate for secure communication. In GKE, this is typically managed automatically. - Use Mutual TLS: For more robust authentication, configure mutual TLS between the API server and other components. You can use a certificate authority (CA) to issue certificates for each component and configure them for mutual authentication.
NEW QUESTION # 47
You are tasked with ensuring the security of a Kubernetes cluster running a sensitive application. Describe now you would implement a "least privilege" principle for both users and service accounts in this cluster.
Answer:
Explanation:
Solution (Step by Step) :
1. User Roles and Permissions:
- Define specific roles with minimal permissions for different user groups based on their responsibilities.
- For example, developers might have access to deploy applications, while operations team members might have access to manage resources.
- use RBAC (Role-Based Access Control) in Kubemetes to define roles and assign them to users.
2. Service Account Permissions:
- Create separate service accounts for each application or service in the cluster.
- Grant the service accounts only the necessary permissions to perform their specific tasks.
- Avoid using default service accounts with broad permissions.
- Employ the "principle ot least privilege" by defining minimal permissions for service accounts.
3. Pod Security Policies (PSPs):
- Implement PSPs to enforce security constraints on pods, restricting resources that they can access.
- Define PSPs to allow only specific container images, disable privileged containers, limit resource requests, and enforce other security controls.
- Consider using Pod Security Admission (PSA) as a replacement for PSPs in Kubernetes 1.25+.
4. Network Policies:
- Implement network policies to control network communication between pods and services.
- Define rules that allow only necessary traffic between pods, restricting any unnecessary or unauthorized connections.
5. Secret Management
- Utilize Kubernetes Secrets to store sensitive information like passwords and API keys.
- Limit access to secrets based on the principle of least privilege.
- Avoid storing sensitive information directly in deployment YAML files.
NEW QUESTION # 48
You need to configure a Kubernetes cluster to enforce the principle of least privilege for all pods in a specific namespace. This means pods should only have access to the resources they need to function correctly. For example, a web server pod should only have access to the network and the service account it requires.
Answer:
Explanation:
Solution (Step by Step) :
1. create a serviceAccount
- Create a new ServiceAccount for the web server pods.
- This ServiceAccount will be assigned a specific set of permissions.
2. Create a Role: - Define a Role that allows the ServiceAccount to access the necessary resources.
3. Create a RoleBinding: - Bind the Role to the ServiceAccount
4. Create a Pod: - Create a Pod in the 'webserver-namespace' and specify the 'serviceAccountName' as 'webserver-sa'
5. Apply the YAML files: - Apply the created YAML files using 'kubectl apply -f 6. Verify the permissions: - Try to perform actions from the webserver-pod. It should only be able to access the resources granted in the role.
NEW QUESTION # 49
......
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