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| Section | Weight | Objectives |
|---|---|---|
| Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
| Supply Chain Security | 20% | - Image scanning and verification - Secure CI/CD practices |
| Cluster Hardening | 15% | - API server security - Authentication and authorization |
| Monitoring, Logging and Runtime Security | 15% | - Audit logging and monitoring - Runtime threat detection |
| System Hardening | 15% | - Host security controls - Kernel and node security configuration |
| Cluster Setup | 15% | - Secure installation configuration - Hardening cluster components |
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NEW QUESTION # 42
You are running a Kubernetes cluster with a number of applications deployed. You want to monitor your applications for suspicious activities and potential security breaches.
How would you implement a monitoring and logging solution that enables you to detect and respond to security threats?
Answer:
Explanation:
Solution (Step by Step) :
1. Enable Kubernetes Audit Logging:
Configure audit logging at the cluster level: This captures all API calls and events within your Kubernetes cluster. Set an appropriate audit policy: Determine the level of detail you need for effective security monitoring. Store audit logs securely: Use a centralized logging solution or secure storage for long-term retention and analysis.
2. Integrate Container Logging:
Use a centralized logging agent: Tools like Fluentd, Logstash, or EFK (Elasticsearch, Fluentd, Kibana) can collect logs from containers and forward them to a central logging platform. Configure log rotation and retention policies: Ensure logs are stored and accessible for a reasonable duration.
Define logging levels: Set log verbosity to capture relevant information for debugging and security analysis.
3. Implement Security Monitoring Tools:
Use a SIEM (Security Information and Event Management) solution: Tools like Splunk, Graylog, or ELK can aggregate logs from various sources (audit logs, container logs, network logs) and analyze them for suspicious patterns.
Set up alerts for potential security events: Configure rules to trigger alerts based on predefined conditions (e.g., unauthorized access attempts, unusual resource usage, malware detection).
4. Deploy Runtime Security Tools:
Use container security scanners: Tools like Clair or Anchore can scan container images for known vulnerabilities and report any potential risks.
Implement runtime security solutions: TOOIS like Falco or Kubernetes Admission Webnooks can monitor container behavior and detect suspicious activities in real-time.
Example Configuration (EFK stack):
Note: The specific configuration and tools will vary based on your chosen monitoring and logging solution. Ensure you nave a comprehensive strategy for data collection, analysis, and response to security threats within your Kubemetes environment
NEW QUESTION # 43
Given an existing Pod named nginx-pod running in the namespace test-system, fetch the service-account-name used and put the content in /candidate/KSC00124.txt Create a new Role named dev-test-role in the namespace test-system, which can perform update operations, on resources of type namespaces.
Create a new RoleBinding named dev-test-role-binding, which binds the newly created Role to the Pod's ServiceAccount ( found in the Nginx pod running in namespace test-system).
Answer:
Explanation:
NEW QUESTION # 44
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://acme.local.8081/image_policy
Answer: A
Explanation:
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as the latest.
NEW QUESTION # 45
SIMULATION
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context qa
Context:
A pod fails to run because of an incorrectly specified ServiceAccount
Task:
Create a new service account named backend-qa in an existing namespace qa, which must not have access to any secret.
Edit the frontend pod yaml to use backend-qa service account
Note: You can find the frontend pod yaml at /home/cert_masters/frontend-pod.yaml
Answer:
Explanation:
See the Explanation belowExplanation:
[desk@cli] $ k create sa backend-qa -n qa
sa/backend-qa created
[desk@cli] $ k get role,rolebinding -n qa
No resources found in qa namespace.
[desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list
# No access to secret
[desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa
[desk@cli] $ vim /home/cert_masters/frontend-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml
pod created
[desk@cli] $ k create sa backend-qa -n qa
serviceaccount/backend-qa created
[desk@cli] $ k get role,rolebinding -n qa
No resources found in qa namespace.
[desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list role.rbac.authorization.k8s.io/backend created
[desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa rolebinding.rbac.authorization.k8s.io/backend created
[desk@cli] $ vim /home/cert_masters/frontend-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml
pod/frontend created
https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/
NEW QUESTION # 46
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
Answer:
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
NEW QUESTION # 47
......
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