CKS Exam Dumps : Certified Kubernetes Security Specialist (CKS)

kubesec scan k8s-deployment.yaml

cat <<EOF > 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

EOF

kubesec scan kubesec-test.yaml

docker run -i kubesec/kubesec:512c5e0 scan /dev/stdin < kubesec-test.yaml

kubesec http 8080 &

[1] 12345

{"severity":"info","timestamp":"2019-05-12T11:58:34.662+0100","caller":"server/server.go:69","message":"Starting HTTP server on port 8080"}

curl -sSX POST --data-binary @test/asset/score-0-cap-sys-admin.yml

[

{

"object": "Pod/security-context-demo.default",

"valid": true,

"message": "Failed with a score of -30 points",

"score": -30,

"scoring": {

"critical": [

{

"selector": "containers[] .securityContext .capabilities .add == SYS_ADMIN",

"reason": "CAP_SYS_ADMIN is the most privileged capability and should always be avoided"

},

{

"selector": "containers[] .securityContext .runAsNonRoot == true",

"reason": "Force the running image to run as a non-root user to ensure least privilege"

},

// ...

Explanation[desk@cli] $vim runtime.yaml

• apiVersion: node.k8s.io/v1
• kind: RuntimeClass
• metadata:
•  name: not-trusted
• handler: runsc

[desk@cli] $ k apply -f runtime.yaml[desk@cli] $ k get pods

• NAME READY STATUS RESTARTS AGE
• nginx-6798fc88e8-chp6r 1/1 Running 0 11m
• nginx-6798fc88e8-fs53n 1/1 Running 0 11m
• nginx-6798fc88e8-ndved 1/1 Running 0 11m

[desk@cli] $ k get deploy

• NAME READY UP-TO-DATE AVAILABLE AGE
• nginx 3/3 11 3 5m

[desk@cli] $ k edit deploy nginx

Text Description automatically generated

[desk@cli] $ k create sa backend-qa -n qasa/backend-qa created[desk@cli] $ k get role,rolebinding -n qaNo 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

• uk.co.certification.simulator.questionpool.PList@59574970

[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yamlpod created

[desk@cli] $ k create sa backend-qa -n qaserviceaccount/backend-qa created[desk@cli] $ k get role,rolebinding -n qaNo resources found in qa namespace.[desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb listrole.rbac.authorization.k8s.io/backend created[desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qarolebinding.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.yamlpod/frontend created