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Linux Foundation CKS Test Dumps

Total Questions Answers: 48
Last Updated: 17-Feb-2025
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Question # 1



A container image scanner is set up on the cluster.
Given an incomplete configuration in the directory /etc/kubernetes/confcontrol and a functional container image scanner with HTTPS endpoint https://test-server.local.8081/image_policy
1. Enable the admission plugin.
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as latest.



Question # 2



use the Trivy to scan the following images,
1. amazonlinux:1
2. k8s.gcr.io/kube-controller-manager:v1.18.6
Look for images with HIGH or CRITICAL severity vulnerabilities and store the output of the same in /opt/trivy-vulnerable.txt
Answer: Send us your suggestion on it.



Question # 3



Enable audit logs in the cluster, To Do so, enable the log backend, and ensure that
1. logs are stored at /var/log/kubernetes-logs.txt.
2. Log files are retained for 12 days.
3. at maximum, a number of 8 old audit logs files are retained.
4. set the maximum size before getting rotated to 200MB

Edit and extend the basic policy to log:
1. namespaces changes at RequestResponse
2. Log the request body of secrets changes in the namespace kube-system
3. Log all other resources in core and extensions at the Request level.
4. Log "pods/portforward", "services/proxy" at Metadata level.
5. Omit the Stage RequestReceived

All other requests at the Metadata level
Explanation:
Kubernetes auditing provides a security-relevant chronological set of records about a cluster. Kube-apiserver performs auditing. Each request on each stage of its execution generates an event, which is then pre-processed according to a certain policy and written to a backend. The policy determines what’s recorded and the backends persist the records.
You might want to configure the audit log as part of compliance with the CIS (Center for Internet Security) Kubernetes Benchmark controls.
The audit log can be enabled by default using the following configuration in cluster.yml:
services:
kube-api:
audit_log:
enabled: true
When the audit log is enabled, you should be able to see the default values at /etc/kubernetes/audit-policy.yaml
The log backend writes audit events to a file in JSONlines format. You can configure the log audit backend using the following kube-apiserver flags:
--audit-log-path specifies the log file path that log backend uses to write audit events. Not specifying this flag disables log backend. - means standard out
--audit-log-maxage defined the maximum number of days to retain old audit log files
--audit-log-maxbackup defines the maximum number of audit log files to retain
--audit-log-maxsize defines the maximum size in megabytes of the audit log file before it gets rotated
If your cluster's control plane runs the kube-apiserver as a Pod, remember to mount the hostPath to the location of the policy file and log file, so that audit records are persisted.
For example:
--audit-policy-file=/etc/kubernetes/audit-policy.yaml \
--audit-log-path=/var/log/audit.log



Question # 4






Question # 5



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.
Explanation:
Install the Runtime Class for gVisor
{ # Step 1: Install a RuntimeClass
cat < 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 < 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
}



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Certified Kubernetes Security Specialist (CKS) Exam Dumps


Exam Code: CKS
Exam Name: Certified Kubernetes Security Specialist (CKS)

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Questions People Ask About CKS Exam

CKS stands for Certified Kubernetes Security Specialist. It's a performance-based exam proving your skills in securing Kubernetes clusters, containerized workloads, and their surrounding environment.

Think of them as complementary certifications:

  • CKA (Certified Kubernetes Administrator): Focuses on deploying, managing, and troubleshooting Kubernetes clusters.
  • CKS (Certified Kubernetes Security Specialist): Builds upon CKA knowledge, focusing on securing clusters, workloads, supply chains, and minimizing vulnerabilities.

Unfortunately, the Linux Foundation (who administers the CKS) doesn't release exact numbers of certified individuals. However, the CKS is a specialized certification, requiring significant Kubernetes security expertise. It's safe to say there are fewer CKS holders compared to the broader CKA certification.

Kubernetes Security Specialists are indeed in high demand. As Kubernetes becomes increasingly prevalent in managing containerized applications, the need for professionals skilled in securing these environments grows. Organizations seek experts who can ensure their Kubernetes deployments are not just efficient but also secure against cyber threats.

Kubernetes Security Specialist (CKS) exam is considered challenging, especially for those new to Kubernetes security practices. It requires a deep understanding of Kubernetes and its security features, as well as hands-on experience. The exam tests the ability to secure container-based applications and Kubernetes platforms during build, deployment, and runtime.

Here's your roadmap to becoming a Kubernetes Security Specialist:

1. Solid Kubernetes Foundation: Earn your CKA or have equivalent experience.
2. Security Fundamentals: Understand network security, Linux hardening, etc.
3. Focused Study: Use CKS-specific prep resources (courses, labs)
4. Practice Makes Perfect: Hands-on scenarios with security tools in Kubernetes
5. CKS Dumps: Prepare real CKS exam questions before appearing in exam.
6. Beyond the Exam: Keep updated on security trends in cloud-native tech.