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CKS日本語版試験解答 & CKS的中合格問題集

BONUS！！！ CertShiken CKSダンプの一部を無料でダウンロード：https://drive.google.com/open?id=1ZiNMwt0SBZcIIdm4txIFc9HlyYwPczKG

あなたより優れる人は存在している理由は彼らはあなたの遊び時間を効率的に使用できることです。どのようにすばらしい人になれますか？ここで、あなたに我々のLinux Foundation　CKS試験問題集をお勧めください。弊社CertShikenのCKS試験問題集を介して、速く試験に合格してCKS試験資格認定書を受け入れる一方で、他の人が知らない知識を勉強して優れる人になることに近くなります。

Linux Foundation Certified Kubernetes Security Specialist（CKS）試験は、Kubernetesのセキュリティ専門家の専門知識を検証する認定です。この認定試験は、安全なKubernetesクラスターを設計、展開、管理できる専門家の知識、スキル、能力をテストするように設計されています。 CKS認定試験は、候補者がKubernetesのセキュリティ原則とベストプラクティスの事前知識と経験を持つことを要求する高度なレベルの認定です。

CKS試験は、Kubernetesのセキュリティを深く理解し、安全なKubernetes環境の設計と実装を担当するIT専門家を対象としています。この試験では、Kubernetesセキュリティの概念、Kubernetesセキュリティコントロール、Kubernetesセキュリティベストプラクティス、セキュリティ監査と監視など、幅広いトピックを扱います。

>> CKS日本語版試験解答 <<

便利なCKS日本語版試験解答 & 合格スムーズCKS的中合格問題集 | 検証するCKS日本語版問題解説

多くの受験者は、当社の試験ブートキャンプ資料が有効であり、Linux Foundation CKS試験をクリアするのに十分であることを知っています。しかし、彼らは、インターネットでの購入は安全ではなく、金銭的にも安全ではなく、情報も安全ではないことを恐れています。実際、あなたは心配しすぎるかもしれません。オンライン販売は非常に一般的です。毎年、数千人の受験者が当社のCKS試験ブートキャンプ資料を選択し、確実に試験に合格しています。お金は確かに安全です。 PayPalはあなたのお金とあなたの安全を保証します。お客様の情報も安全であることを保証するために、厳格な情報秘密システムがあります。

Linux Foundation CKS (Certified Kubernetes Security Specialist) 認証試験は、Kubernetes クラスターのセキュリティを確保するための知識、スキル、専門知識を認定するグローバルに認知された認証プログラムです。Kubernetes は、世界中の組織で使用されている人気のあるコンテナオーケストレーションプラットフォームであり、展開時にセキュリティは重要な要素です。CKS 認証試験は、プロフェッショナルが Kubernetes 環境を効果的にセキュアにするために必要な知識とスキルを持っていることを保証するように設計されています。

Linux Foundation Certified Kubernetes Security Specialist (CKS) 認定 CKS 試験問題 (Q52-Q57):

質問 # 52
Context:
Cluster: prod
Master node: master1
Worker node: worker1
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context prod
Task:
Analyse and edit the given Dockerfile (based on the ubuntu:18:04 image)
/home/cert_masters/Dockerfile fixing two instructions present in the file being prominent security/best-practice issues.
Analyse and edit the given manifest file
/home/cert_masters/mydeployment.yaml fixing two fields present in the file being prominent security/best-practice issues.
Note: Don't add or remove configuration settings; only modify the existing configuration settings, so that two configuration settings each are no longer security/best-practice concerns.
Should you need an unprivileged user for any of the tasks, use user nobody with user id 65535

正解：

解説：
1. For Dockerfile: Fix the image version & user name in Dockerfile
2. For mydeployment.yaml : Fix security contexts
Explanation
[desk@cli] $ vim /home/cert_masters/Dockerfile
FROM ubuntu:latest # Remove this
FROM ubuntu:18.04 # Add this
USER root # Remove this
USER nobody # Add this
RUN apt get install -y lsof=4.72 wget=1.17.1 nginx=4.2
ENV ENVIRONMENT=testing
USER root # Remove this
USER nobody # Add this
CMD ["nginx -d"]

[desk@cli] $ vim /home/cert_masters/mydeployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
creationTimestamp: null
labels:
app: kafka
name: kafka
spec:
replicas: 1
selector:
matchLabels:
app: kafka
strategy: {}
template:
metadata:
creationTimestamp: null
labels:
app: kafka
spec:
containers:
- image: bitnami/kafka
name: kafka
volumeMounts:
- name: kafka-vol
mountPath: /var/lib/kafka
securityContext:
{"capabilities":{"add":["NET_ADMIN"],"drop":["all"]},"privileged": True,"readOnlyRootFilesystem": False, "runAsUser": 65535} # Delete This
{"capabilities":{"add":["NET_ADMIN"],"drop":["all"]},"privileged": False,"readOnlyRootFilesystem": True, "runAsUser": 65535} # Add This resources: {} volumes:
- name: kafka-vol
emptyDir: {}
status: {}
Pictorial View:
[desk@cli] $ vim /home/cert_masters/mydeployment.yaml

質問 # 53
You're working on a Kubernetes cluster where container images are pulled from a private registry. Security best practices dictate that you should configure the cluster to only allow image pulls from authorized registries. Explain how you would enforce this policy using image admission controllers and provide a practical example of an admission control configuration.

正解：

解説：
Solution (Step by Step) :
1. Enable Image Admission Controller:
- Install the Admission Controller. The 'ImagePolicyWebhook' admission controller enforces policies on container images. You can install it as part of your Kubernetes deployment or using a Helm chart.
2. Create a Policy Configuration:
- Define the Policy: Use a YAML file to define the rules for the admission controller. This policy will specify the allowed registries.
- Example Policy Configuration:

3. Configure the Service: - Create a Service: Create a Kubernetes service that exposes the admission controllers endpoint. - Example Service Configuration:

4. Deploy the Policy Engine: - Create a Deployment: Create a Kubernetes deployment to run the policy engine (e.g., a container image with the admission controller logic). - Example Deployment Configuration:

5. Verify the Configuration: - Test Image Pulls: Attempt to pull images from both authorized and unauthorized registries. - Monitor tor Policy Enforcement: Observe the admission controllers logs to confirm that it iS successtully blocking pulls from unauthorized registries. - Validate Security: Ensure that the policy effectively prevents the use of unauthorized container image sources, enhancing the clusters security posture.

質問 # 54
SIMULATION
Context
For testing purposes, the kubeadm provisioned cluster 's API server
was configured to allow unauthenticated and unauthorized access.
Task
First, secure the cluster 's API server configuring it as follows:
. Forbid anonymous authentication
. Use authorization mode Node,RBAC
. Use admission controller NodeRestriction
The cluster uses the Docker Engine as its container runtime . If needed, use the docker command to troubleshoot running containers.
kubectl is configured to use unauthenticated and unauthorized access. You do not have to change it, but be aware that kubectl will stop working once you have secured the cluster .
You can use the cluster 's original kubectl configuration file located at etc/kubernetes/admin.conf to access the secured cluster.
Next, to clean up, remove the ClusterRoleBinding
system:anonymous.

正解：

解説：
See the Explanation below for complete solution
Explanation:
1) SSH to control-plane node
ssh cks000002
sudo -i
2) Edit API Server static pod manifest
API server in kubeadm runs as a static pod.
vi /etc/kubernetes/manifests/kube-apiserver.yaml
3) Apply required API Server security settings
3.1 Forbid anonymous authentication
Find command: section and ensure this line exists:
- --anonymous-auth=false
3.2 Use authorization mode Node,RBAC
Ensure exactly this line exists (and no AlwaysAllow):
- --authorization-mode=Node,RBAC
❌ Remove if present:
- --authorization-mode=AlwaysAllow
3.3 Enable admission controller NodeRestriction
Find --enable-admission-plugins and ensure NodeRestriction is included.
Correct example:
- --enable-admission-plugins=NodeRestriction
If other plugins already exist, append NodeRestriction, e.g.:
- --enable-admission-plugins=NamespaceLifecycle,ServiceAccount,NodeRestriction
4) Save file and let kubelet restart API server
Just save and exit (:wq)
Kubelet will automatically restart the API server pod.
5) Switch kubectl to secured config
Current kubectl will stop working after API server hardening.
export KUBECONFIG=/etc/kubernetes/admin.conf
Verify access:
kubectl get nodes
6) Remove insecure ClusterRoleBinding
Delete system:anonymous binding:
kubectl delete clusterrolebinding system:anonymous
Verify removal:
kubectl get clusterrolebinding | grep anonymous
(no output = correct)
7) Quick validation (optional but fast)
API server flags check:
grep -n "anonymous-auth" /etc/kubernetes/manifests/kube-apiserver.yaml
grep -n "authorization-mode" /etc/kubernetes/manifests/kube-apiserver.yaml grep -n "NodeRestriction" /etc/kubernetes/manifests/kube-apiserver.yaml

質問 # 55
SIMULATION

Two tools are pre-installed on the cluster's worker node:
Using the tool of your choice (including any non pre-installed tool), analyze the container's behavior for at least 30 seconds, using filters that detect newly spawning and executing processes.
Store an incident file at /opt/KSRS00101/alerts/details, containing the detected incidents, one per line, in the following format:

The following example shows a properly formatted incident file:

正解：

解説：
See explanation below
Explanation:

質問 # 56
Describe now you would design a security posture for a Kubernetes cluster using the CIS Kubernetes Benchmark as a guideline. Include key areas to focus on, relevant security controls, and how you would monitor and enforce compliance with the benchmark.

正解：

解説：
Solution (Step by Step) :
1. Review CIS Kubernetes Benchmark:
- Thoroughly familiarize yourself With the CIS Kubernetes Benchmark, which outlines security best practices and controls.
2. Assess Current Security Posture:
- Audit the current security configuration of your Kubernetes cluster against the CIS benchmark. This includes:
- Cluster Access Control: Verity that access iS restricted to authorized users and accounts.
- Authentication and Authorization: Ensure that strong authentication mechanisms are in place and that roles are properly assigned.
- Image Security: Review the security of images used in your deployments, ensuring they are from trusted sources and have appropriate security measures.
- Network Security: Implement network policies to restrict communication between pods and enforce least-privilege access.
- Pod Security: Define PodSecurityPoIicies to control resources and capabilities available to pods.
- Logging and Monitoring: Configure robust logging and monitoring systems to detect and respond to security incidents.
3. Develop Security Controls:
- Implement security controls based on the CIS benchmark findings. This may include:
- RBAC (Role-Based Access Control): Use RBAC to define granular permissions for users and service accounts.
- Network Policies: Implement network policies to restrict inter-pod communication and external access.
- Admission Controllers: Use admission controllers like PodSecurityPolicy and NetworkPolicy to enforce security policies before deployments are allowed.
- Image Scanning: Regularly scan container images for vulnerabilities.
- Secret Management: Securely manage and store sensitive information using Kubernetes Secrets.
- Logging and Monitoring: Configure centralized logging and monitoring systems to track activity and identity security events.
4. Monitor and Enforce Compliance:
- Continuously monitor the cluster's security posture against the CIS benchmark using tools like:
- Kube-bench: A tool for assessing Kubernetes security posture.
- CIS Kubernetes Benchmark Scanner A dedicated scanner for compliance checks.
- Custom Monitoring Tools: Develop custom tools to monitor specific aspects of the cluster.
- Implement mechanisms to automate security cnecks and enforce compliance. This could involve:
- Automated Security Scanning: Schedule regular security scans.
- Alerting: Configure alerts for security events and non-compliant configurations.
- Remediation: Implement automated remediation actions for security vulnerabilities.
5. Continuous Improvement:
- Regularly review and update the security posture to stay ahead of evolving threats.
- Keep up with the latest security recommendations and updates to the CIS Kubernetes Benchmark.
- Conduct security training for team members to promote awareness and best practices.

質問 # 57
......

CKS的中合格問題集: https://www.certshiken.com/CKS-shiken.html

ちなみに、CertShiken CKSの一部をクラウドストレージからダウンロードできます：https://drive.google.com/open?id=1ZiNMwt0SBZcIIdm4txIFc9HlyYwPczKG