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Download Certified Kubernetes Security Specialist (CKS) Exam Dumps

NEW QUESTION 45

You can switch the cluster/configuration context using the following command: [desk@cli] $ kubectl config use-context dev Context: A CIS Benchmark tool was run against the kubeadm created cluster and found multiple issues that must be addressed. Task: Fix all issues via configuration and restart the affected components to ensure the new settings take effect. Fix all of the following violations that were found against the API server: 1.2.7 authorization-mode argument is not set to AlwaysAllow FAIL 1.2.8 authorization-mode argument includes Node FAIL 1.2.7 authorization-mode argument includes RBAC FAIL Fix all of the following violations that were found against the Kubelet: 4.2.1 Ensure that the anonymous-auth argument is set to false FAIL 4.2.2 authorization-mode argument is not set to AlwaysAllow FAIL (Use Webhook autumn/authz where possible) Fix all of the following violations that were found against etcd: 2.2 Ensure that the client-cert-auth argument is set to true

Answer:

Explanation:

worker1 $ vim /var/lib/kubelet/config.yaml

anonymous:

enabled: true #Delete this

enabled: false #Replace by this

authorization:

mode: AlwaysAllow #Delete this

mode: Webhook #Replace by this

worker1 $ systemctl restart kubelet. # To reload kubelet config ssh to master1 master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml - -- authorization-mode=Node,RBAC master1 $ vim /etc/kubernetes/manifests/etcd.yaml - --client-cert-auth=true Explanation ssh to worker1 worker1 $ vim /var/lib/kubelet/config.yaml apiVersion: kubelet.config.k8s.io/v1beta1 authentication:

anonymous:

enabled: true #Delete this

enabled: false #Replace by this

webhook:

cacheTTL: 0s

enabled: true

x509:

clientCAFile: /etc/kubernetes/pki/ca.crt

authorization:

mode: AlwaysAllow #Delete this

mode: Webhook #Replace by this

webhook:

cacheAuthorizedTTL: 0s

cacheUnauthorizedTTL: 0s

cgroupDriver: systemd

clusterDNS:

- 10.96.0.10

clusterDomain: cluster.local

cpuManagerReconcilePeriod: 0s

evictionPressureTransitionPeriod: 0s

fileCheckFrequency: 0s

healthzBindAddress: 127.0.0.1

healthzPort: 10248

httpCheckFrequency: 0s

imageMinimumGCAge: 0s

kind: KubeletConfiguration

logging: {}

nodeStatusReportFrequency: 0s

nodeStatusUpdateFrequency: 0s

resolvConf: /run/systemd/resolve/resolv.conf

rotateCertificates: true

runtimeRequestTimeout: 0s

staticPodPath: /etc/kubernetes/manifests

streamingConnectionIdleTimeout: 0s

syncFrequency: 0s

volumeStatsAggPeriod: 0s

worker1 $ systemctl restart kubelet. # To reload kubelet config ssh to master1 master1 $ vim /etc/kubernetes/manifests/kube-apiserver.yaml

master1 $ vim /etc/kubernetes/manifests/etcd.yaml

NEW QUESTION 46

Before Making any changes build the Dockerfile with tag base:v1

Now Analyze and edit the given Dockerfile(based on ubuntu 16:04)

Fixing two instructions present in the file, Check from Security Aspect and Reduce Size point of view.

Dockerfile:

FROM ubuntu:latest

RUN apt-get update -y

RUN apt install nginx -y

COPY entrypoint.sh /

RUN useradd ubuntu

ENTRYPOINT ["/entrypoint.sh"]

USER ubuntu

entrypoint.sh

#!/bin/bash

echo "Hello from CKS"

After fixing the Dockerfile, build the docker-image with the tag base:v2

A. To Verify: Check the size of the image before and after the build.

Answer: A

NEW QUESTION 47

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.

Answer:

Explanation:

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"]