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The Certified Kubernetes Security Specialist (CKS) is the latest professional certification offered by the Linux Foundation. It is designed for Kubernetes security professionals who have extensive knowledge and experience in securing containerized applications in the Kubernetes environment. The CKS Certification validates the skills needed to secure Kubernetes clusters and containerized applications, including working with Kubernetes APIs, securing Kubernetes resources, and using Kubernetes authentication and authorization systems.
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The CKS exam is intended for experienced Kubernetes administrators and security professionals who are responsible for securing Kubernetes environments. CKS exam covers a broad range of topics, including Kubernetes cluster setup, authentication and authorization, network security, storage security, and container security. Candidates will be tested on their ability to identify and mitigate security risks, implement security policies, configure security features, and audit Kubernetes environments. Passing the CKS Exam requires a deep understanding of Kubernetes security principles and practices, as well as hands-on experience in securing Kubernetes environments.
NEW QUESTION # 33
SIMULATION
Create a User named john, create the CSR Request, fetch the certificate of the user after approving it.
Create a Role name john-role to list secrets, pods in namespace john
Finally, Create a RoleBinding named john-role-binding to attach the newly created role john-role to the user john in the namespace john.
To Verify: Use the kubectl auth CLI command to verify the permissions.
Answer:
Explanation:
See explanation below
Explanation:
se kubectl to create a CSR and approve it.
Get the list of CSRs:
kubectl get csr
Approve the CSR:
kubectl certificate approve myuser
Get the certificate
Retrieve the certificate from the CSR:
kubectl get csr/myuser -o yaml
here are the role and role-binding to give john permission to create NEW_CRD resource:
kubectl apply -f roleBindingJohn.yaml --as=john
rolebinding.rbac.authorization.k8s.io/john_external-rosource-rb created kind: RoleBinding apiVersion: rbac.authorization.k8s.io/v1 metadata:
name: john_crd
namespace: development-john
subjects:
- kind: User
name: john
apiGroup: rbac.authorization.k8s.io
roleRef:
kind: ClusterRole
name: crd-creation
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: crd-creation
rules:
- apiGroups: ["kubernetes-client.io/v1"]
resources: ["NEW_CRD"]
verbs: ["create, list, get"]
NEW QUESTION # 34
SIMULATION
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
Hint: docker run -i kubesec/kubesec:512c5e0 scan /dev/stdin < kubesec-test.yaml
Answer:
Explanation:
See the Explanation belowExplanation:
kubesec scan k8s-deployment.yaml
cat <<EOF > 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
EOF
kubesec scan kubesec-test.yaml
docker run -i kubesec/kubesec:512c5e0 scan /dev/stdin < kubesec-test.yaml kubesec http 8080 &
[1] 12345
{"severity":"info","timestamp":"2019-05-12T11:58:34.662+0100","caller":"server/server.go:69","message":"Starting HTTP server on port 8080"} curl -sSX POST --data-binary @test/asset/score-0-cap-sys-admin.yml http://localhost:8080/scan
[
{
"object": "Pod/security-context-demo.default",
"valid": true,
"message": "Failed with a score of -30 points",
"score": -30,
"scoring": {
"critical": [
{
"selector": "containers[] .securityContext .capabilities .add == SYS_ADMIN",
"reason": "CAP_SYS_ADMIN is the most privileged capability and should always be avoided"
},
{
"selector": "containers[] .securityContext .runAsNonRoot == true",
"reason": "Force the running image to run as a non-root user to ensure least privilege"
},
// ...
NEW QUESTION # 35
SIMULATION
Context
Your organization's security policy includes:
ServiceAccounts must not automount API credentials
ServiceAccount names must end in "-sa"
The Pod specified in the manifest file /home/candidate/KSCH00301 /pod-m nifest.yaml fails to schedule because of an incorrectly specified ServiceAccount.
Complete the following tasks:
Task
1. Create a new ServiceAccount named frontend-sa in the existing namespace qa. Ensure the ServiceAccount does not automount API credentials.
2. Using the manifest file at /home/candidate/KSCH00301 /pod-manifest.yaml, create the Pod.
3. Finally, clean up any unused ServiceAccounts in namespace qa.
Answer:
Explanation:
See the Explanation below
Explanation:
NEW QUESTION # 36
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 # 37
You have a Kubernetes cluster witn a Deployment named 'my-app' that runs multiple replicas of an application. The application exposes an API endpoint on port 8080- You need to configure a network policy that allows only specific IP addresses to access this endpoint.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a Network Policy:
- Define a NetworkPoIicy resource with a 'podSeIector targeting the 'my-app' Deployment
- Specify an 'ingress' rule that allows traffic from the allowed IP addresses.
- Use the 'from' field to specify the source IP addresses. You can either provide individual IP addresses or CIDR ranges.
- Ensure that the port 8080 is allowed in the 'ports field.
2. Apply the Network Policy: - Apply the YAML file using 'kubectl apply -f my-app-network-policy.yamr 3. Verify the Network Policy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use kubectl describe networkpolicy my-app-network-policy' to view the details of the applied policy. 4. Test the Network Policy: - Attempt to access the API endpoint from an allowed IP address and verify that the connection is successful. - Attempt to access the API endpoint from a blocked IP address and verity that the connection is denied.
NEW QUESTION # 38
......
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