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Technologies are changing at a very rapid pace. Therefore, the Certified Kubernetes Security Specialist (CKS) in Procurement and Supply Linux Foundation has become very significant to validate expertise and level up career. Success in the Certified Kubernetes Security Specialist (CKS) examination helps you meet the ever-changing dynamics of the tech industry. To advance your career, you must register for the Certified Kubernetes Security Specialist (CKS) CKS in Procurement and Supply Linux Foundation test and put all your efforts to crack the Linux Foundation CKS challenging examination.
The CKS certification exam covers a range of security-related topics, including container security, Kubernetes API security, network security, access control, auditing and logging, and more. Candidates must have a solid understanding of Kubernetes security concepts, including how to secure Kubernetes deployments, implement security policies, and manage security risks. They must also be able to demonstrate their ability to use Kubernetes security tools, such as kube-bench, kube-hunter, and others, to identify and mitigate security vulnerabilities. Overall, the CKS Certification Exam is an excellent way for professionals to enhance their Kubernetes security skills and demonstrate their expertise in this highly competitive field.
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The CKS Exam is a performance-based assessment that evaluates the candidate’s ability to apply their knowledge of Kubernetes security principles in real-world scenarios. CKS exam covers a wide range of topics, including Kubernetes cluster setup, RBAC authorization, network policies, container security, and other security best practices. It is a hands-on exam that requires candidates to perform various tasks using a live Kubernetes environment.
NEW QUESTION # 55
Task
Analyze and edit the given Dockerfile /home/candidate/KSSC00301/Docker file (based on the ubuntu:16.04 image), fixing two instructions present in the file that are prominent security/best-practice issues.
Analyze and edit the given manifest file /home/candidate/KSSC00301/deployment.yaml, fixing two fields present in the file that are prominent security/best-practice issues.
Answer:
Explanation:
NEW QUESTION # 56
SIMULATION
Analyze and edit the given Dockerfile
FROM ubuntu:latest
RUN apt-get update -y
RUN apt-install nginx -y
COPY entrypoint.sh /
ENTRYPOINT ["/entrypoint.sh"]
USER ROOT
Fixing two instructions present in the file being prominent security best practice issues Analyze and edit the deployment manifest file apiVersion: v1 kind: Pod metadata:
name: security-context-demo-2
spec:
securityContext:
runAsUser: 1000
containers:
- name: sec-ctx-demo-2
image: gcr.io/google-samples/node-hello:1.0
securityContext:
runAsUser: 0
privileged: True
allowPrivilegeEscalation: false
Fixing two fields present in the file being prominent security best practice issues Don't add or remove configuration settings; only modify the existing configuration settings Whenever you need an unprivileged user for any of the tasks, use user test-user with the user id 5487
Answer: A
NEW QUESTION # 57
You are tasked with securing the container image supply chain for your organization_ You are using a container registry that supports signing and verification of container images. You need to create a policy that ensures only signed images from a specific trusted source are deployed to your Kubernetes cluster.
Answer:
Explanation:
Solution (Step by Step) :
1. Configure the Container Registry:
- Enable Image Signing: Enable image signing functionality in your container registry (e.g., Docker Hub, Google Container Registry, etc.).
- Create a Signing Key: Generate a signing key and store it securely. This key will be used to sign images from the trusted source.
2 Create a Kubernetes Admission Controller:
- Use an Admission Controller like "Container Image Signature Validation Admission Webhook" to enforce image signature verification during deployment. This Admission Controller ensures that only signed images are allowed to be deployed to your cluster.
3. Configure the Admission Controller:
- Create a Service Account: Create a Service Account with the necessary permissions to access your container registry and verify image signatures.
- Create a Deployment for the Admission Controller: Deploy the Admission Controller with a pod using the Service Account created earlier.
- Configure the Admission Controller: Configure the Admission Controller to use your signing key to verify signatures.
4. Deploy Signed Images:
- Sign Images: Use the signing key to sign images from the trusted source before pushing them to the container registry.
- Deploy Signed Images: Deploy the signed images to your Kubernetes cluster. The Admission Controller will verity their signatures before allowing the deployment.
Example:
This example uses the 'image-signature-validator' container image available on Quay.i0. The 'config.yamr file in the ConfigMap defines the signing key and trusted image sources. Remember to replace these values with your actual information.
NEW QUESTION # 58
SIMULATION
Documentation Upgrading kubeadm clusters
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000034
Context
The kubeadm provisioned cluster was recently upgraded, leaving one node on a slightly older version due to workload compatibility concerns.
Task
Upgrade the cluster node compute-0 to match the version of the control plane node.
Use a command like the following to connect to the compute node:
[candidate@cks000034] $ ssh compute-0
Do not modify any running workloads in the cluster.
Do not forget to exit from the compute node once you have completed your tasks:
[candidate@icompute-e] $ exit
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
Below is the CKS / CKA exam-style, exact step-by-step solution for Upgrading a kubeadm worker node.
Follow in order, type exact commands, no extra actions.
QUESTION - Upgrade node compute-0 (EXAM MODE)
1) Connect to the correct host (control plane)
ssh cks000034
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) Identify the control plane Kubernetes version
This is the target version for compute-0.
kubectl get nodes
Example output:
NAME STATUS ROLES VERSION
control-plane Ready control-plane v1.27.4
compute-0 Ready <none> v1.26.6
Note the control-plane version
Example: v1.27.4
3) Drain the compute node (do NOT modify workloads manually)
kubectl drain compute-0 --ignore-daemonsets --delete-emptydir-data
Wait until drain completes successfully.
4) SSH into the compute node
ssh compute-0
sudo -i
5) Check current kubeadm version on compute node
kubeadm version
6) Upgrade kubeadm to match control plane version
Replace 1.27.4 with the exact control-plane version you observed.
apt-get update
apt-get install -y kubeadm=1.27.4-00
Verify:
kubeadm version
7) Run kubeadm upgrade for the node
kubeadm upgrade node
✅ This updates node-specific configs (NO workloads touched).
8) Upgrade kubelet and kubectl to the same version
apt-get install -y kubelet=1.27.4-00 kubectl=1.27.4-00
9) Restart kubelet
systemctl daemon-reload
systemctl restart kubelet
systemctl status kubelet --no-pager
10) Exit the compute node (IMPORTANT)
exit
11) Uncordon the compute node (back on control plane)
kubectl uncordon compute-0
12) Final verification
kubectl get nodes
Expected:
NAME STATUS VERSION
compute-0 Ready v1.27.4
NEW QUESTION # 59
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 # 60
......
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