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4.2. 授权

4.2.1. 概述
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基于角色的访问控制(RBAC)对象确定是否允许用户在项目内执行给定的 操作。

这允许平台管理员使用 集群角色和绑定 来控制谁对 OpenShift Container Platform 平台本身和所有项目具有各种访问权限级别。

开发人员可以 利用本地角色和绑定来控制 谁有权访问 其项目。请注意，授权是独立于 身份验证 的一个步骤，身份验证更在于确定执行操作的人员的身份。

授权通过使用以下几项来管理：

Expand

Rules

组 对象 上允许 的操作 集合。例如，某容能否 创建 pod。

Roles

规则的集合。用户和组 可以同时关联或绑定到多个角色。

Bindings

用户和/组与 角色 之间的关联。

集群管理员可以使用 CLI 视觉化规则、角色和绑定。

例如，请考虑以下摘录，其中显示了 admin 和 basic-user 默认集群角色 的规则集： 

$ oc describe clusterrole.rbac admin basic-user
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输出示例

Name:		admin
Labels:		<none>
Annotations:	openshift.io/description=A user that has edit rights within the project and can change the project's membership.
		rbac.authorization.kubernetes.io/autoupdate=true
PolicyRule:
  Resources							Non-Resource URLs	Resource Names	Verbs
  ---------							-----------------	--------------	-----
  appliedclusterresourcequotas					[]			[]		[get list watch]
  appliedclusterresourcequotas.quota.openshift.io		[]			[]		[get list watch]
  bindings							[]			[]		[get list watch]
  buildconfigs							[]			[]		[create delete deletecollection get list patch update watch]
  buildconfigs.build.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  buildconfigs/instantiate					[]			[]		[create]
  buildconfigs.build.openshift.io/instantiate			[]			[]		[create]
  buildconfigs/instantiatebinary				[]			[]		[create]
  buildconfigs.build.openshift.io/instantiatebinary		[]			[]		[create]
  buildconfigs/webhooks						[]			[]		[create delete deletecollection get list patch update watch]
  buildconfigs.build.openshift.io/webhooks			[]			[]		[create delete deletecollection get list patch update watch]
  buildlogs							[]			[]		[create delete deletecollection get list patch update watch]
  buildlogs.build.openshift.io					[]			[]		[create delete deletecollection get list patch update watch]
  builds							[]			[]		[create delete deletecollection get list patch update watch]
  builds.build.openshift.io					[]			[]		[create delete deletecollection get list patch update watch]
  builds/clone							[]			[]		[create]
  builds.build.openshift.io/clone				[]			[]		[create]
  builds/details						[]			[]		[update]
  builds.build.openshift.io/details				[]			[]		[update]
  builds/log							[]			[]		[get list watch]
  builds.build.openshift.io/log					[]			[]		[get list watch]
  configmaps							[]			[]		[create delete deletecollection get list patch update watch]
  cronjobs.batch						[]			[]		[create delete deletecollection get list patch update watch]
  daemonsets.extensions						[]			[]		[get list watch]
  deploymentconfigrollbacks					[]			[]		[create]
  deploymentconfigrollbacks.apps.openshift.io			[]			[]		[create]
  deploymentconfigs						[]			[]		[create delete deletecollection get list patch update watch]
  deploymentconfigs.apps.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  deploymentconfigs/instantiate					[]			[]		[create]
  deploymentconfigs.apps.openshift.io/instantiate		[]			[]		[create]
  deploymentconfigs/log						[]			[]		[get list watch]
  deploymentconfigs.apps.openshift.io/log			[]			[]		[get list watch]
  deploymentconfigs/rollback					[]			[]		[create]
  deploymentconfigs.apps.openshift.io/rollback			[]			[]		[create]
  deploymentconfigs/scale					[]			[]		[create delete deletecollection get list patch update watch]
  deploymentconfigs.apps.openshift.io/scale			[]			[]		[create delete deletecollection get list patch update watch]
  deploymentconfigs/status					[]			[]		[get list watch]
  deploymentconfigs.apps.openshift.io/status			[]			[]		[get list watch]
  deployments.apps						[]			[]		[create delete deletecollection get list patch update watch]
  deployments.extensions					[]			[]		[create delete deletecollection get list patch update watch]
  deployments.extensions/rollback				[]			[]		[create delete deletecollection get list patch update watch]
  deployments.apps/scale					[]			[]		[create delete deletecollection get list patch update watch]
  deployments.extensions/scale					[]			[]		[create delete deletecollection get list patch update watch]
  deployments.apps/status					[]			[]		[create delete deletecollection get list patch update watch]
  endpoints							[]			[]		[create delete deletecollection get list patch update watch]
  events							[]			[]		[get list watch]
  horizontalpodautoscalers.autoscaling				[]			[]		[create delete deletecollection get list patch update watch]
  horizontalpodautoscalers.extensions				[]			[]		[create delete deletecollection get list patch update watch]
  imagestreamimages						[]			[]		[create delete deletecollection get list patch update watch]
  imagestreamimages.image.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  imagestreamimports						[]			[]		[create]
  imagestreamimports.image.openshift.io				[]			[]		[create]
  imagestreammappings						[]			[]		[create delete deletecollection get list patch update watch]
  imagestreammappings.image.openshift.io			[]			[]		[create delete deletecollection get list patch update watch]
  imagestreams							[]			[]		[create delete deletecollection get list patch update watch]
  imagestreams.image.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  imagestreams/layers						[]			[]		[get update]
  imagestreams.image.openshift.io/layers			[]			[]		[get update]
  imagestreams/secrets						[]			[]		[create delete deletecollection get list patch update watch]
  imagestreams.image.openshift.io/secrets			[]			[]		[create delete deletecollection get list patch update watch]
  imagestreams/status						[]			[]		[get list watch]
  imagestreams.image.openshift.io/status			[]			[]		[get list watch]
  imagestreamtags						[]			[]		[create delete deletecollection get list patch update watch]
  imagestreamtags.image.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  jenkins.build.openshift.io					[]			[]		[admin edit view]
  jobs.batch							[]			[]		[create delete deletecollection get list patch update watch]
  limitranges							[]			[]		[get list watch]
  localresourceaccessreviews					[]			[]		[create]
  localresourceaccessreviews.authorization.openshift.io		[]			[]		[create]
  localsubjectaccessreviews					[]			[]		[create]
  localsubjectaccessreviews.authorization.k8s.io		[]			[]		[create]
  localsubjectaccessreviews.authorization.openshift.io		[]			[]		[create]
  namespaces							[]			[]		[get list watch]
  namespaces/status						[]			[]		[get list watch]
  networkpolicies.extensions					[]			[]		[create delete deletecollection get list patch update watch]
  persistentvolumeclaims					[]			[]		[create delete deletecollection get list patch update watch]
  pods								[]			[]		[create delete deletecollection get list patch update watch]
  pods/attach							[]			[]		[create delete deletecollection get list patch update watch]
  pods/exec							[]			[]		[create delete deletecollection get list patch update watch]
  pods/log							[]			[]		[get list watch]
  pods/portforward						[]			[]		[create delete deletecollection get list patch update watch]
  pods/proxy							[]			[]		[create delete deletecollection get list patch update watch]
  pods/status							[]			[]		[get list watch]
  podsecuritypolicyreviews					[]			[]		[create]
  podsecuritypolicyreviews.security.openshift.io		[]			[]		[create]
  podsecuritypolicyselfsubjectreviews				[]			[]		[create]
  podsecuritypolicyselfsubjectreviews.security.openshift.io	[]			[]		[create]
  podsecuritypolicysubjectreviews				[]			[]		[create]
  podsecuritypolicysubjectreviews.security.openshift.io		[]			[]		[create]
  processedtemplates						[]			[]		[create delete deletecollection get list patch update watch]
  processedtemplates.template.openshift.io			[]			[]		[create delete deletecollection get list patch update watch]
  projects							[]			[]		[delete get patch update]
  projects.project.openshift.io					[]			[]		[delete get patch update]
  replicasets.extensions					[]			[]		[create delete deletecollection get list patch update watch]
  replicasets.extensions/scale					[]			[]		[create delete deletecollection get list patch update watch]
  replicationcontrollers					[]			[]		[create delete deletecollection get list patch update watch]
  replicationcontrollers/scale					[]			[]		[create delete deletecollection get list patch update watch]
  replicationcontrollers.extensions/scale			[]			[]		[create delete deletecollection get list patch update watch]
  replicationcontrollers/status					[]			[]		[get list watch]
  resourceaccessreviews						[]			[]		[create]
  resourceaccessreviews.authorization.openshift.io		[]			[]		[create]
  resourcequotas						[]			[]		[get list watch]
  resourcequotas/status						[]			[]		[get list watch]
  resourcequotausages						[]			[]		[get list watch]
  rolebindingrestrictions					[]			[]		[get list watch]
  rolebindingrestrictions.authorization.openshift.io		[]			[]		[get list watch]
  rolebindings							[]			[]		[create delete deletecollection get list patch update watch]
  rolebindings.authorization.openshift.io			[]			[]		[create delete deletecollection get list patch update watch]
  rolebindings.rbac.authorization.k8s.io			[]			[]		[create delete deletecollection get list patch update watch]
  roles								[]			[]		[create delete deletecollection get list patch update watch]
  roles.authorization.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  roles.rbac.authorization.k8s.io				[]			[]		[create delete deletecollection get list patch update watch]
  routes							[]			[]		[create delete deletecollection get list patch update watch]
  routes.route.openshift.io					[]			[]		[create delete deletecollection get list patch update watch]
  routes/custom-host						[]			[]		[create]
  routes.route.openshift.io/custom-host				[]			[]		[create]
  routes/status							[]			[]		[get list watch update]
  routes.route.openshift.io/status				[]			[]		[get list watch update]
  scheduledjobs.batch						[]			[]		[create delete deletecollection get list patch update watch]
  secrets							[]			[]		[create delete deletecollection get list patch update watch]
  serviceaccounts						[]			[]		[create delete deletecollection get list patch update watch impersonate]
  services							[]			[]		[create delete deletecollection get list patch update watch]
  services/proxy						[]			[]		[create delete deletecollection get list patch update watch]
  statefulsets.apps						[]			[]		[create delete deletecollection get list patch update watch]
  subjectaccessreviews						[]			[]		[create]
  subjectaccessreviews.authorization.openshift.io		[]			[]		[create]
  subjectrulesreviews						[]			[]		[create]
  subjectrulesreviews.authorization.openshift.io		[]			[]		[create]
  templateconfigs						[]			[]		[create delete deletecollection get list patch update watch]
  templateconfigs.template.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]
  templateinstances						[]			[]		[create delete deletecollection get list patch update watch]
  templateinstances.template.openshift.io			[]			[]		[create delete deletecollection get list patch update watch]
  templates							[]			[]		[create delete deletecollection get list patch update watch]
  templates.template.openshift.io				[]			[]		[create delete deletecollection get list patch update watch]


Name:		basic-user
Labels:		<none>
Annotations:	openshift.io/description=A user that can get basic information about projects.
		rbac.authorization.kubernetes.io/autoupdate=true
PolicyRule:
  Resources						Non-Resource URLs	Resource Names	Verbs
  ---------						-----------------	--------------	-----
  clusterroles						[]			[]		[get list]
  clusterroles.authorization.openshift.io		[]			[]		[get list]
  clusterroles.rbac.authorization.k8s.io		[]			[]		[get list watch]
  projectrequests					[]			[]		[list]
  projectrequests.project.openshift.io			[]			[]		[list]
  projects						[]			[]		[list watch]
  projects.project.openshift.io				[]			[]		[list watch]
  selfsubjectaccessreviews.authorization.k8s.io		[]			[]		[create]
  selfsubjectrulesreviews				[]			[]		[create]
  selfsubjectrulesreviews.authorization.openshift.io	[]			[]		[create]
  storageclasses.storage.k8s.io				[]			[]		[get list]
  users							[]			[~]		[get]
  users.user.openshift.io				[]			[~]		[get]
Copy to Clipboard Toggle word wrap

以下摘录查看本地角色绑定，显示了绑定到不同用户和组的以上角色： 

$ oc describe rolebinding.rbac admin basic-user -n alice-project
Copy to Clipboard Toggle word wrap

输出示例

Name:		admin
Labels:		<none>
Annotations:	<none>
Role:
  Kind:	ClusterRole
  Name:	admin
Subjects:
  Kind	Name		Namespace
  ----	----		---------
  User	system:admin
  User	alice


Name:		basic-user
Labels:		<none>
Annotations:	<none>
Role:
  Kind:	ClusterRole
  Name:	basic-user
Subjects:
  Kind	Name	Namespace
  ----	----	---------
  User	joe
  Group	devel
Copy to Clipboard Toggle word wrap

下方展示了集群角色、本地角色、集群角色绑定、本地角色绑定、用户、组和服务帐户之间的关系。

OpenShift Container Platform RBAC
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