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NEW QUESTION 47
SIMULATION
Use the kubesec docker images to scan the given YAML manifest, edit and apply the advised changes, and passed with a score of 4 points.
kubesec-test.yaml
apiVersion: v1
kind: Pod
metadata:
name: kubesec-demo
spec:
containers:
– name: kubesec-demo
image: gcr.io/google-samples/node-hello:1.0
securityContext:
readOnlyRootFilesystem: true
Hint: docker run -i kubesec/kubesec:512c5e0 scan /dev/stdin < kubesec-test.yaml
- A. Send us the Feedback on it.
Answer: A
NEW QUESTION 48
You can switch the cluster/configuration context using the following command:
[desk@cli] $ kubectl config use-context dev
A default-deny NetworkPolicy avoid to accidentally expose a Pod in a namespace that doesn’t have any other NetworkPolicy defined.
Task: Create a new default-deny NetworkPolicy named deny-network in the namespace test for all traffic of type Ingress + Egress The new NetworkPolicy must deny all Ingress + Egress traffic in the namespace test.
Apply the newly created default-deny NetworkPolicy to all Pods running in namespace test.
You can find a skeleton manifests file at /home/cert_masters/network-policy.yaml
Answer:
Explanation:
master1 $ k get pods -n test –show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
$ vim netpol.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
– Ingress
– Egress
master1 $ k apply -f netpol.yaml
Explanation
controlplane $ k get pods -n test –show-labels
NAME READY STATUS RESTARTS AGE LABELS
test-pod 1/1 Running 0 34s role=test,run=test-pod
testing 1/1 Running 0 17d run=testing
master1 $ vim netpol1.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
– Ingress
– Egress
master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/ Reference:
master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/ Explanation controlplane $ k get pods -n test –show-labels NAME READY STATUS RESTARTS AGE LABELS test-pod 1/1 Running 0 34s role=test,run=test-pod testing 1/1 Running 0 17d run=testing master1 $ vim netpol1.yaml apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata:
name: deny-network
namespace: test
spec:
podSelector: {}
policyTypes:
– Ingress
– Egress
master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/ master1 $ k apply -f netpol1.yaml Reference: https://kubernetes.io/docs/concepts/services-networking/network-policies/
NEW QUESTION 49
Create a PSP that will only allow the persistentvolumeclaim as the volume type in the namespace restricted.
Create a new PodSecurityPolicy named prevent-volume-policy which prevents the pods which is having different volumes mount apart from persistentvolumeclaim.
Create a new ServiceAccount named psp-sa in the namespace restricted.
Create a new ClusterRole named psp-role, which uses the newly created Pod Security Policy prevent-volume-policy
Create a new ClusterRoleBinding named psp-role-binding, which binds the created ClusterRole psp-role to the created SA psp-sa.
Hint:
Also, Check the Configuration is working or not by trying to Mount a Secret in the pod maifest, it should get failed.
POD Manifest:
apiVersion: v1
kind: Pod
metadata:
name:
spec:
containers:
– name:
image:
volumeMounts:
– name:
mountPath:
volumes:
– name:
secret:
secretName:
Answer:
Explanation:
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: restricted
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: ‘docker/default,runtime/default’ apparmor.security.beta.kubernetes.io/allowedProfileNames: ‘runtime/default’ seccomp.security.alpha.kubernetes.io/defaultProfileName: ‘runtime/default’ apparmor.security.beta.kubernetes.io/defaultProfileName: ‘runtime/default’ spec:
privileged: false
# Required to prevent escalations to root.
allowPrivilegeEscalation: false
# This is redundant with non-root + disallow privilege escalation,
# but we can provide it for defense in depth.
requiredDropCapabilities:
– ALL
# Allow core volume types.
volumes:
– ‘configMap’
– ’emptyDir’
– ‘projected’
– ‘secret’
– ‘downwardAPI’
# Assume that persistentVolumes set up by the cluster admin are safe to use.
– ‘persistentVolumeClaim’
hostNetwork: false
hostIPC: false
hostPID: false
runAsUser:
# Require the container to run without root privileges.
rule: ‘MustRunAsNonRoot’
seLinux:
# This policy assumes the nodes are using AppArmor rather than SELinux.
rule: ‘RunAsAny’
supplementalGroups:
rule: ‘MustRunAs’
ranges:
# Forbid adding the root group.
– min: 1
max: 65535
fsGroup:
rule: ‘MustRunAs’
ranges:
# Forbid adding the root group.
– min: 1
max: 65535
readOnlyRootFilesystem: false
NEW QUESTION 50
……
