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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Minimizing Microservice Vulnerabilities | 20% | - Container isolation and security contexts - Pod security standards |
| Topic 2: System Hardening | 15% | - Kernel and node security configuration - Host security controls |
| Topic 3: Supply Chain Security | 20% | - Secure CI/CD practices - Image scanning and verification |
| Topic 4: Cluster Setup | 15% | - Secure installation configuration - Hardening cluster components |
| Topic 5: Monitoring, Logging and Runtime Security | 15% | - Runtime threat detection - Audit logging and monitoring |
| Topic 6: Cluster Hardening | 15% | - Authentication and authorization - API server security |
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NEW QUESTION # 51
Your Kubernetes cluster is running a set of microservices that are deployed in separate namespaces. You want to ensure that a specific microservice in the 'web-app' namespace can only communicate with services in the 'api-gateway' namespace. How can you implement this using NetworkPolicies?
Answer:
Explanation:
Solution (Step by Step) :
1. Identify Targeted Services: Determine the specific microservice in the 'web-app' namespace that needs restricted access. Let's assume it's named 'web-service'
2 Create Network Policy: Create a NetworkPolicy YAML file named 'web-service-access-yamr to define the allowed communication:
- This policy allows the 'web-services pods in the 'web-app' namespace to communicate With services in the sapi-gateways namespace. 3. Apply Network Policy: Apply the NetworkPolicy using ' kubectr' bash kubectl apply -f web-service-access-yaml 4. Verify Network Policy: Verify that the NetworkPolicy is applied: bash kubectl get networkpolicies -n web-app 5. Test Access: Test communication from the 'web-service pods in the 'web-apps namespace to services in the 'api-gateway' namespace. This communication should be allowed. Try communicating from the 'web-service' pods to services in other namespaces. This communication should be blocked. This NetworkPolicy restricts the 'web-services pods to only communicate with services in the 'api-gateway' namespace. This effectively enforces a specific communication pattern between microservices deployed in different namespaces.
NEW QUESTION # 52
SIMULATION
Create a Pod name Nginx-pod inside the namespace testing, Create a service for the Nginx-pod named nginx-svc, using the ingress of your choice, run the ingress on tls, secure port.
Answer: A
NEW QUESTION # 53
Your Kubernetes cluster runs a Deployment named 'database' which exposes a database service. You need to implement a NetworkPolicy that allows only pods belonging to a specific namespace to access the database service.
Answer:
Explanation:
Solution (Step by Step) :
1. Create a NetworkPolicy:
- Define a NetworkPolicy resource with a 'podSelector' that matches the 'database' Deployment.
- Create an 'ingress' rule that allows traffic from pods in the specified namespace.
- Use the 'from' field to specify the namespace and set the 'namespacesaector' to the desired namespace.
- Ensure that the port used by the database service is included in the 'ports' field.
2. Apply the NetworkPolicy: - Apply the YAML file using 'kubectl apply -f database-access-policy.yaml 3. Verify the NetworkPoIicy: - Use 'kubectl get networkpolicies' to list the available network policies. - Use 'kubectl describe networkpolicy database-access-policy' to view the details ot the applied policy. 4. Test the NetworkPolicy: - Deploy a pod in the 'allowed-namespace' and attempt to connect to the database service. Verify that the connection is successful. - Deploy a pod in a different namespace and attempt to connect to the database service. Verify that the connection is denied.
NEW QUESTION # 54
Create a PSP that will prevent the creation of privileged pods in the namespace.
Create a new PodSecurityPolicy named prevent-privileged-policy which prevents the creation of privileged pods.
Create a new ServiceAccount named psp-sa in the namespace default.
Create a new ClusterRole named prevent-role, which uses the newly created Pod Security Policy prevent-privileged-policy.
Create a new ClusterRoleBinding named prevent-role-binding, which binds the created ClusterRole prevent-role to the created SA psp-sa.
Also, Check the Configuration is working or not by trying to Create a Privileged pod, it should get failed.
Answer:
Explanation:
Create a PSP that will prevent the creation of privileged pods in the namespace.
$ cat clusterrole-use-privileged.yaml
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: use-privileged-psp
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames:
- default-psp
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: privileged-role-bind
namespace: psp-test
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: use-privileged-psp
subjects:
- kind: ServiceAccount
name: privileged-sa
$ kubectl -n psp-test apply -f clusterrole-use-privileged.yaml
After a few moments, the privileged Pod should be created.
Create a new PodSecurityPolicy named prevent-privileged-policy which prevents the creation of privileged pods.
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: example
spec:
privileged: false # Don't allow privileged pods!
# The rest fills in some required fields.
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
runAsUser:
rule: RunAsAny
fsGroup:
rule: RunAsAny
volumes:
- '*'
And create it with kubectl:
kubectl-admin create -f example-psp.yaml
Now, as the unprivileged user, try to create a simple pod:
kubectl-user create -f- <<EOF
apiVersion: v1
kind: Pod
metadata:
name: pause
spec:
containers:
- name: pause
image: k8s.gcr.io/pause
EOF
The output is similar to this:
Error from server (Forbidden): error when creating "STDIN": pods "pause" is forbidden: unable to validate against any pod security policy: [] Create a new ServiceAccount named psp-sa in the namespace default.
$ cat clusterrole-use-privileged.yaml
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: use-privileged-psp
rules:
- apiGroups: ['policy']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames:
- default-psp
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: privileged-role-bind
namespace: psp-test
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: use-privileged-psp
subjects:
- kind: ServiceAccount
name: privileged-sa
$ kubectl -n psp-test apply -f clusterrole-use-privileged.yaml
After a few moments, the privileged Pod should be created.
Create a new ClusterRole named prevent-role, which uses the newly created Pod Security Policy prevent-privileged-policy.
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: example
spec:
privileged: false # Don't allow privileged pods!
# The rest fills in some required fields.
seLinux:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
runAsUser:
rule: RunAsAny
fsGroup:
rule: RunAsAny
volumes:
- '*'
And create it with kubectl:
kubectl-admin create -f example-psp.yaml
Now, as the unprivileged user, try to create a simple pod:
kubectl-user create -f- <<EOF
apiVersion: v1
kind: Pod
metadata:
name: pause
spec:
containers:
- name: pause
image: k8s.gcr.io/pause
EOF
The output is similar to this:
Error from server (Forbidden): error when creating "STDIN": pods "pause" is forbidden: unable to validate against any pod security policy: [] Create a new ClusterRoleBinding named prevent-role-binding, which binds the created ClusterRole prevent-role to the created SA psp-sa.
apiVersion: rbac.authorization.k8s.io/v1
# This role binding allows "jane" to read pods in the "default" namespace.
# You need to already have a Role named "pod-reader" in that namespace.
kind: RoleBinding
metadata:
name: read-pods
namespace: default
subjects:
# You can specify more than one "subject"
- kind: User
name: jane # "name" is case sensitive
apiGroup: rbac.authorization.k8s.io
roleRef:
# "roleRef" specifies the binding to a Role / ClusterRole
kind: Role #this must be Role or ClusterRole
name: pod-reader # this must match the name of the Role or ClusterRole you wish to bind to apiGroup: rbac.authorization.k8s.io apiVersion: rbac.authorization.k8s.io/v1 kind: Role metadata:
namespace: default
name: pod-reader
rules:
- apiGroups: [""] # "" indicates the core API group
resources: ["pods"]
verbs: ["get", "watch", "list"]
NEW QUESTION # 55
SIMULATION
Task
Analyze and edit the given Dockerfile /home/candidate/KSSC00301/Docker file (based on the ubuntu:16.04 image), fixing two instructions present in the file that are prominent security/best-practice issues.
Analyze and edit the given manifest file /home/candidate/KSSC00301/deployment.yaml, fixing two fields present in the file that are prominent security/best-practice issues.
Answer:
Explanation:
See the Explanation below
Explanation:
NEW QUESTION # 56
......
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