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| Section | Weight | Objectives |
|---|---|---|
| Cluster Setup | 10% | - Use Pod Security Policies to control security-related pod behaviors - Implement Pod-to-Pod encryption using mTLS or WireGuard - Understand the security implications of embedding cloud provider flags - Manage sensitive information in clusters - Configure TLS certificates and minimum version for etcd - Use Cis benchmarks to check Kubernetes cluster settings - Use role-based access control (RBAC) to minimize exposure |
| System Hardening | 15% | - Kernel defaults and parameters using sysctl - Modify host components to improve security - Enable audit logging - Understand the concept of OPA (Open Policy Agent) and Gatekeeper |
| Minimize Microservice Vulnerabilities | 20% | - Understand the principle of immutable containers - Set appropriate security contexts for pods and containers - Use OPA Gatekeeper to enforce security controls - Use AppArmor or seccomp profiles to constrain container behavior - Configure network policies for namespace isolation - Use PSP to enforce security controls |
| Cluster Hardening | 15% | - Minimize admission of containers with hostPath volumes - Minimize admission of containers with added capabilities - Minimize admission of containers with sharing the host process namespace - Minimize admission of privileged containers - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers without seccomp profiles - Minimize admission of containers with FlexVolume volumes - Minimize admission of containers with capabilities assigned - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers with raw block devices - Minimize admission of containers without AppArmor profile - Minimize admission of containers without a security context - Minimize admission of containers that allow host namespaces |
| Monitoring, Logging, and Runtime Security | 20% | - Perform behavioral analytics to detect malicious activity - Minimize the attack surface using container health indicators - Detect threats at the container level - Audit and detect logs and events for anomalies - Falco - container security monitoring and threat detection - Understand and monitor network traffic |
| Supply Chain Security | 20% | - Understand the software supply chain best practices - Understand image security scanning and its workflow - Minimize base image footprint - Use image admission controllers to prevent use of untrusted images - Understand the container build process - Use distroless images for static workload - Sign container images and verify signatures - Use static analysis tools to detect vulnerabilities |
Die zielgerichteten Prüfungsfragen und Antworten zur Linux Foundation CKS Zertifizierungsprüfung von PrüfungFrage sind sehr beliebt. Mit den Materialien von PrüfungFrage können Sie nicht nur neue Kenntnisse und Erfahrungen gewinnen, sondern sich auch genügend auf die Prüfung vorbereiten. Obwohl die Linux Foundation CKS Zertifizierungsprüfung schwer ist, würden Sie mehr Selbewusstsein für die Prüfung haben, nachdem Sie diese Fragenkataloge gekauft haben. Wählen Sie die effizienten Fragenkataloge von PrüfungFrage ganz beruhigt, um sich genügend auf die Linux Foundation CKS (Certified Kubernetes Security Specialist (CKS)) Zertifizierungsprüfung vorzubereiten.
61. Frage
You must complete this task on the following cluster/nodes:
Cluster: trace
Master node: master
Worker node: worker1
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context trace
Given: You may use Sysdig or Falco documentation.
Task:
Use detection tools to detect anomalies like processes spawning and executing something weird frequently in the single container belonging to Pod tomcat.
Two tools are available to use:
1. falco
2. sysdig
Tools are pre-installed on the worker1 node only.
Analyse the container's behaviour for at least 40 seconds, using filters that detect newly spawning and executing processes.
Store an incident file at /home/cert_masters/report, in the following format:
[timestamp],[uid],[processName]
Note: Make sure to store incident file on the cluster's worker node, don't move it to master node.
Antwort:
Begründung:
$vim /etc/falco/falco_rules.local.yaml
- rule: Container Drift Detected (open+create)
desc: New executable created in a container due to open+create
condition: >
evt.type in (open,openat,creat) and
evt.is_open_exec=true and
container and
not runc_writing_exec_fifo and
not runc_writing_var_lib_docker and
not user_known_container_drift_activities and
evt.rawres>=0
output: >
%evt.time,%user.uid,%proc.name # Add this/Refer falco documentation
priority: ERROR
$kill -1 <PID of falco>
Explanation
[desk@cli] $ ssh node01
[node01@cli] $ vim /etc/falco/falco_rules.yaml
search for Container Drift Detected & paste in falco_rules.local.yaml
[node01@cli] $ vim /etc/falco/falco_rules.local.yaml
- rule: Container Drift Detected (open+create)
desc: New executable created in a container due to open+create
condition: >
evt.type in (open,openat,creat) and
evt.is_open_exec=true and
container and
not runc_writing_exec_fifo and
not runc_writing_var_lib_docker and
not user_known_container_drift_activities and
evt.rawres>=0
output: >
%evt.time,%user.uid,%proc.name # Add this/Refer falco documentation
priority: ERROR
[node01@cli] $ vim /etc/falco/falco.yaml
62. Frage
Your application requires access to specific network resources, but you want to restrict its communication to only these allowed ports and IP addresses. Explain how to achieve this using AppArmor profiles.
Antwort:
Begründung:
Solution (Step by Step) :
1. Define the AppArmor Profile:
- Create an 'apparmor.conf file with the following content:
- This example allows connections to port 80 on the IP address '10.0.0.10' and port 443 on the IP address '192.168.1.1'.
2. Apply the AppArmor Profile to the Container: - You can apply the AppArmor profile to the container using the 'securityContext' in your deployment or pod spec. - Include the following configuration: - 'securityContext.apparmor.profileName: my-app-profile'
3. Load and Enable the Profile: - Use the following command to load the 'apparmor.conf file: - 'sudo apparmor_parser -r Ipath/to/apparmor.conr - Enable the profile for the container. - 'sudo aa-enforce my-app-profile' 4. Test and Verify: - Deploy the application with the AppArmor profile. - Attempt to access the allowed network resources. - Verify that the application can successfully connect to the specified ports and IP addresses. - Attempt to access other network resources that are not allowed. - Verify that the AppArmor profile blocks these attempts.
63. Frage
You are using a third-party Helm chart to deploy an application to your Kubernetes cluster. You need to ensure that the Helm chart adheres to security best practices and does not introduce any vulnerabilities into your cluster. Implement a solution that uses KubeLinter to statically analyze the Helm chart before deployment.
Antwort:
Begründung:
Solution (Step by Step):
1. Install KubeLinter: Download and install the 'kubevar binary from the official GitHub repository.
2. Render the Helm chart: use the 'helm template' command to render the Helm chart into Kubernetes YAML manifests.
bash
helm template my-chart -f values.yaml > rendered-templates.yaml
3. Validate the rendered YAML manifests using KubeLinter Use the 'kubevar command to validate the rendered YAML manifests against the
Kubernetes schema and your custom rules.
bash
kubeval rendered-templates.yaml
4. Integrate KubeLinter into your CI/CD pipeline: Add a step to your pipeline that renders the Helm chart and runs KubeLinter against the rendered
YAML manifests. This step should be executed before the chart is deployed.
64. Frage
You are tasked with implementing a security policy that prohibits the use of privileged containers in your Kubernetes cluster. Implement a solution that uses KubeLinter to enforce this policy by automatically scanning all deployments and preventing deployments that violate the policy.
Antwort:
Begründung:
Solution (Step by Step):
1. Install KubeLinter: Download and install the 'kubevar binary from the official GitHub repository.
2. Create a custom KubeLinter check: Define a custom check that prohibits the use of privileged containers. This check can be defined in a separate
YAML file or embedded in your '.kubeval.yaml configuration file.
3. Configure KubeLinter to use the custom check: Add the custom check to your .kuoeval.yaml configuration file.
4. Integrate KubeLinter into your CI/CD pipeline: Add a step to your pipeline that runs KubeLinter against your deployment YAML manifests. This step should be executed before the manifests are deployed to the cluster.
5. (Optional) Implement an admission controller: For real-time enforcement, deploy an admission controller that uses KubeLinter to validate deployments as they are created or updated. This will prevent any deployments that violate the policy from being created in the cluster. Tools like Kyverno or Gatekeeper can be used to create and enforce such policies.
65. Frage
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.
Antwort:
Begründung:
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"]
66. Frage
......
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2026 Die neuesten PrüfungFrage CKS PDF-Versionen Prüfungsfragen und CKS Fragen und Antworten sind kostenlos verfügbar: https://drive.google.com/open?id=12tm7wXncJT0Os5C8rBM6ZsxYxt_kS8U1