CKS試験の準備方法｜一番優秀なCKS最新関連参考書試験｜高品質なCertified Kubernetes Security Specialist (CKS)資格認定試験
r u5f0au793eu306fu304au5ba2u69d8u306eu7686u69d8u306eu5229u76cau3092u4fddu8a3cu3059u308bu305fu3081u306bu3001u3042u306au305fu306bu9ad8u3044u30afu30aau30eau30c6u30a3u306eu30b5u30fcu30d3u30b9u3092u63d0u4f9bu3067u304du3066u52aau529bu3057u3066u3044u307eu3059u3002u4ecau307eu3067u3001u5f0au793eu306eJpexamu306eCKSu554fu984cu96c6u306fu305du306eu30b9u30edu30fcu30acu30f3u306bu6cbfu3063u3066u5354u529bu3057u307eu3059u3002u5f0au793eu306eu4fe1u983cu3067u304du308bCKSu554fu984cu96c6u3092u4f7fu7528u3057u305fu304au5ba2u69d8u306fu307bu3068u3093u3069u8a66u9a13u306bu5408u683cu3057u307eu3057u305fu3002r u5f53u793eu306eCKSu30c6u30b9u30c8u30c8u30ecu30f3u30c8u306fu3001u8ab2u984cu306bu53d6u308au7d44u307fu3001Certified Kubernetes Security Specialist (CKS)u8a66u9a13u306bu5408u683cu3059u308bu306eu306bu5f79u7acbu3064u65b0u3057u3044u65b9u6cd5u3092u63a2u3057u7d9au3051u307eu3059u3002u5f53u793eu306eu512au308cu305fu30d1u30d5u30a9u30fcu30deu30f3u30b9u306bu3088u308au3001u4e16u754cu6709u6570u306eu56fdu969bu8a66u9a13u9280u884cu3068u3057u3066u8a8du3081u3089u308cu308bu305fu3081u306bu3001u5f53u793eu306eCertified Kubernetes Security Specialist (CKS)u8a8du5b9au8a66u9a13u306fu9577u3044u9593u96c6u4e2du3057u3066u304au308au3001u6559u6750u306eu8a2du8a08u306bu591au304fu306eu30eau30bdu30fcu30b9u3068u7d4cu9a13u3092u84c4u7a4du3057u3066u304du307eu3057u305fu3002 Certified Kubernetes Security Specialist (CKS)u8a66u9a13u8a3cu660eu66f8u306eu53d6u5f97u3092u652fu63f4u3057u307eu3059u3002u79c1u305fu3061u306fu5fc3u304bu3089u3042u306au305fu304cu79c1u305fu3061u3092u4fe1u983cu3057u3001u9078u629eu3059u308bu3053u3068u3092u5fc3u304bu3089u9858u3063u3066u3044u307eu3059u3002r >> CKSu6700u65b0u95a2u9023u53c2u8003u66f8 <<r CKSu8cc7u683cu8a8du5b9au8a66u9a13u3001CKSu8a66u9a13u53c2u8003u66f8r u4ebau751fu306fu81eau8ee2u8ecau306bu4e57u308bu3068u4f3cu3066u3044u3066u3001u3084u3081u306au3044u9650u308au3001u5012u308cu306au3044u304bu3089u3002ITu6280u8853u8077u54e1u3068u3057u3066u3001u5468u308au306eu4ebau306fLinux Foundation CKSu8a66u9a13u306bu5408u683cu3057u9ad8u3044u6708u7d66u3092u6301u3063u3066u3001u4e0au53f8u304bu3089u3054u683cu5225u306eu611bu8b77u3092u8cdcu308au66f4u306au308bu30b8u30e7u30d6u30d7u30edu30e2u30fcu30b7u30e7u30f3u3092u671fu5f85u3055u308cu307eu3059u3051u3069u3001u3042u3093u305fu306fu3053u3046u3044u3046u3088u3046u306bu6240u6709u3057u305fu3044u307eu3059u304bu3002u5909u5316u3092u671fu5f85u3057u305fu3044u3042u306au305fu306bLinux Foundation CKSu8a66u9a13u5099u8003u8cc7u6599u3092u63d0u4f9bu3059u308bu6a29u5a01u6027u306eu3042u308bJpexamu3092u304au52e7u3081u3055u305bu3066u3044u305fu3060u3051u307eu305bu3093u304bu3002r Linux Foundation Certified Kubernetes Security Specialist (CKS) u8a8du5b9a CKS u8a66u9a13u554fu984c (Q26-Q31):r u8ceau554f # 26 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.r A. Send us your Feedback on this.r u6b63u89e3uff1aAr u8ceau554f # 27 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: v1kind: Podmetadata:name:spec:containers:- name:image:volumeMounts:- name:mountPath:volumes:- name:secret:secretname:r u6b63u89e3uff1ar u89e3u8aacuff1aapiVersion: policy/v1beta1kind: PodSecurityPolicymetadata:name: restrictedannotations: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: falsehostIPC: falsehostPID: falserunAsUser:# 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: 1max: 65535fsGroup:rule: 'MustRunAs'ranges:# Forbid adding the root group.- min: 1max: 65535readOnlyRootFilesystem: falser u8ceau554f # 28 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.r u6b63u89e3uff1ar u89e3u8aacuff1aCreate a PSP that will prevent the creation of privileged pods in the namespace.$ cat clusterrole-use-privileged.yaml---apiVersion: rbac.authorization.k8s.io/v1kind: ClusterRolemetadata:name: use-privileged-psprules:- apiGroups: ['policy']resources: ['podsecuritypolicies']verbs: ['use']resourceNames:- default-psp---apiVersion: rbac.authorization.k8s.io/v1kind: RoleBindingmetadata:name: privileged-role-bindnamespace: psp-testroleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: use-privileged-pspsubjects:- kind: ServiceAccountname: privileged-sa$ kubectl -n psp-test apply -f clusterrole-use-privileged.yamlAfter 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/v1beta1kind: PodSecurityPolicymetadata:name: examplespec:privileged: false # Don't allow privileged pods!# The rest fills in some required fields.seLinux:rule: RunAsAnysupplementalGroups:rule: RunAsAnyrunAsUser:rule: RunAsAnyfsGroup:rule: RunAsAnyvolumes:- '*'And create it with kubectl:kubectl-admin create -f example-psp.yamlNow, as the unprivileged user, try to create a simple pod:kubectl-user create -f- <<EOFapiVersion: v1kind: Podmetadata:name: pausespec:containers:- name: pauseimage: k8s.gcr.io/pauseEOFThe 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/v1kind: ClusterRolemetadata:name: use-privileged-psprules:- apiGroups: ['policy']resources: ['podsecuritypolicies']verbs: ['use']resourceNames:- default-psp---apiVersion: rbac.authorization.k8s.io/v1kind: RoleBindingmetadata:name: privileged-role-bindnamespace: psp-testroleRef:apiGroup: rbac.authorization.k8s.iokind: ClusterRolename: use-privileged-pspsubjects:- kind: ServiceAccountname: privileged-sa$ kubectl -n psp-test apply -f clusterrole-use-privileged.yamlAfter 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/v1beta1kind: PodSecurityPolicymetadata:name: examplespec:privileged: false # Don't allow privileged pods!# The rest fills in some required fields.seLinux:rule: RunAsAnysupplementalGroups:rule: RunAsAnyrunAsUser:rule: RunAsAnyfsGroup:rule: RunAsAnyvolumes:- '*'And create it with kubectl:kubectl-admin create -f example-psp.yamlNow, as the unprivileged user, try to create a simple pod:kubectl-user create -f- <<EOFapiVersion: v1kind: Podmetadata:name: pausespec:containers:- name: pauseimage: k8s.gcr.io/pauseEOFThe 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: RoleBindingmetadata:name: read-podsnamespace: defaultsubjects:# You can specify more than one "subject"- kind: Username: jane # "name" is case sensitiveapiGroup: rbac.authorization.k8s.ioroleRef:# "roleRef" specifies the binding to a Role / ClusterRolekind: Role #this must be Role or ClusterRolename: 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: defaultname: pod-readerrules:- apiGroups: [""] # "" indicates the core API groupresources: ["pods"]verbs: ["get", "watch", "list"]r u8ceau554f # 29 Fix all issues via configuration and restart the affected components to ensure the new setting takes effect.Fix all of the following violations that were found against the API server:- a. Ensure that the RotateKubeletServerCertificate argument is set to true.b. Ensure that the admission control plugin PodSecurityPolicy is set.c. Ensure that the --kubelet-certificate-authority argument is set as appropriate.Fix all of the following violations that were found against the Kubelet:- a. Ensure the --anonymous-auth argument is set to false.b. Ensure that the --authorization-mode argument is set to Webhook.Fix all of the following violations that were found against the ETCD:-a. Ensure that the --auto-tls argument is not set to trueb. Ensure that the --peer-auto-tls argument is not set to trueHint: Take the use of Tool Kube-Benchr u6b63u89e3uff1ar u89e3u8aacuff1aFix all of the following violations that were found against the API server:- a. Ensure that the RotateKubeletServerCertificate argument is set to true.apiVersion: v1kind: Podmetadata:creationTimestamp: nulllabels:component: kubelettier: control-planename: kubeletnamespace: kube-systemspec:containers:- command:- kube-controller-manager - --feature-gates=RotateKubeletServerCertificate=trueimage: gcr.io/google_containers/kubelet-amd64:v1.6.0livenessProbe:failureThreshold: 8httpGet:host: 127.0.0.1path: /healthzport: 6443scheme: HTTPSinitialDelaySeconds: 15timeoutSeconds: 15name: kubeletresources:requests:cpu: 250mvolumeMounts:- mountPath: /etc/kubernetes/name: k8sreadOnly: true- mountPath: /etc/ssl/certsname: certs- mountPath: /etc/pkiname: pkihostNetwork: truevolumes:- hostPath:path: /etc/kubernetesname: k8s- hostPath:path: /etc/ssl/certsname: certs- hostPath:path: /etc/pkiname: pkib. Ensure that the admission control plugin PodSecurityPolicy is set.audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"tests:test_items:- flag: "--enable-admission-plugins"compare:op: hasvalue: "PodSecurityPolicy"set: trueremediation: |Follow the documentation and create Pod Security Policy objects as per your environment.Then, edit the API server pod specification file $apiserverconfon the master node and set the --enable-admission-plugins parameter to a value that includes PodSecurityPolicy :--enable-admission-plugins=...,PodSecurityPolicy,...Then restart the API Server.scored: truec. Ensure that the --kubelet-certificate-authority argument is set as appropriate.audit: "/bin/ps -ef | grep $apiserverbin | grep -v grep"tests:test_items:- flag: "--kubelet-certificate-authority"set: trueremediation: |Follow the Kubernetes documentation and setup the TLS connection between the apiserver and kubelets. Then, edit the API server pod specification file$apiserverconf on the master node and set the --kubelet-certificate-authority parameter to the path to the cert file for the certificate authority.--kubelet-certificate-authority=<ca-string>scored: trueFix all of the following violations that were found against the ETCD:-a. Ensure that the --auto-tls argument is not set to trueEdit the etcd pod specification file $etcdconf on the masternode and either remove the --auto-tls parameter or set it to false.--auto-tls=falseb. Ensure that the --peer-auto-tls argument is not set to trueEdit the etcd pod specification file $etcdconf on the masternode and either remove the --peer-auto-tls parameter or set it to false.--peer-auto-tls=falser u8ceau554f # 30 ContextA default-deny NetworkPolicy avoids to accidentally expose a Pod in a namespace that doesn't have any other NetworkPolicy defined.TaskCreate a new default-deny NetworkPolicy named defaultdeny in the namespace testing for all traffic of type Egress.The new NetworkPolicy must deny all Egress traffic in the namespace testing.Apply the newly created default-deny NetworkPolicy to all Pods running in namespace testing.r u6b63u89e3uff1ar u89e3u8aacuff1ar u8ceau554f # 31......r CKSu8a66u9a13u8cc7u6599u306e3u3064u306eu30d0u30fcu30b8u30e7u30f3u306eu306au304bu3067u3001PDFu30d0u30fcu30b8u30e7u30f3u306eCKSu30c8u30ecu30fcu30cbu30f3u30b0u30acu30a4u30c9u306fu3001u30c0u30a6u30f3u30edu30fcu30c9u3068u5370u5237u3067u304du3001u53d7u9a13u8005u306eu305fu3081u306bu7279u306bu7528u610fu3055u308cu3066u3044u307eu3059u3002u643au5e2fu96fbu8a71u306bu30d6u30e9u30a6u30b6u3092u30a4u30f3u30b9u30c8u30fcu30ebu3067u304du3001 u79c1u305fu3061u306eCKSu8a66u9a13u8cc7u6599u306eAppu7248u3092u4f7fu7528u3059u308bu3053u3068u3082u3067u304du307eu3059u3002 PCu7248u306fu3001u5b9fu969bu306eu8a66u9a13u74b0u5883u3092u6a21u64ecu3057u3001Windowsu30b7u30b9u30c6u30e0u306eu30b3u30f3u30d4u30e5u30fcu30bfu306bu9069u3057u307eu3059u3002r CKSu8cc7u683cu8a8du5b9au8a66u9a13: https://www.jpexam.com/CKS_exam.htmlr 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