Question

问题

我想在开发组中向许多不同的开发人员（不同的主题）颁发证书，并让他们都有权在dev命名空间内创建和修改内容，但不要触摸它之外的任何东西，并且绝对不会在它之外看到秘密。我怀疑我在下面的第2步中创建的角色，角色绑定等是不正确的，有人可以建议更正吗？

尝试

使用API服务器标记部署Kubernetes以支持＆＃34; RBAC，AlwaysAllow＆＃34;授权模式，设置RBAC超级用户，并通过--runtime-config启用RBAC API。
创建了命名空间，角色和角色绑定，其意图是：（a）服务帐户和系统组件可以有效地仍然具有＆＃34; AlwaysAllow＆＃34;访问，以及（b）组dev中的任何实体都可以使用this YAML file访问名称空间dev中的任何内容。 注意：此链接的内容已更改，请参阅我在问题底部工作的YAML文件。
更新了Kubernetes，只允许＆＃34; RBAC＆＃34;授权模式。
生成的客户端TLS数据，其中证书主题标记（对于openssl）为-subj "/CN=example-dev@kubernetes.click/O=dev"。
在this template之后生成了一个kubeconfig文件。

实际结果

运行时遇到以下错误：kubectl -v 8 --kubeconfig=/tmp/dev-kube-config.yml create -f /tmp/busybox.yml：

I1219 16:12:37.584657   44323 loader.go:354] Config loaded from file /tmp/dev-kube-config.yml
I1219 16:12:37.585953   44323 round_trippers.go:296] GET https://api.kubernetes.click/api
I1219 16:12:37.585968   44323 round_trippers.go:303] Request Headers:
I1219 16:12:37.585983   44323 round_trippers.go:306]     Accept: application/json, */*
I1219 16:12:37.585991   44323 round_trippers.go:306]     User-Agent: kubectl/v1.5.1+82450d0 (    darwin/amd64) kubernetes/82450d0
I1219 16:12:38.148994   44323 round_trippers.go:321] Response Status: 403 Forbidden in 562     milliseconds
I1219 16:12:38.149056   44323 round_trippers.go:324] Response Headers:
I1219 16:12:38.149070   44323 round_trippers.go:327]     Content-Type: text/plain; charset=utf-    8
I1219 16:12:38.149081   44323 round_trippers.go:327]     Content-Length: 17
I1219 16:12:38.149091   44323 round_trippers.go:327]     Date: Tue, 20 Dec 2016 00:12:38 GMT
I1219 16:12:38.149190   44323 request.go:904] Response Body: Forbidden: "/api"
I1219 16:12:38.149249   44323 request.go:995] Response Body: "Forbidden: \"/api\""
I1219 16:12:38.149567   44323 request.go:1151] body was not decodable (unable to check for     Status): Object 'Kind' is missing in 'Forbidden: "/api"'
...
I1219 16:12:38.820672   44323 round_trippers.go:296] GET https://api.kubernetes.    click/swaggerapi/api/v1
I1219 16:12:38.820702   44323 round_trippers.go:303] Request Headers:
I1219 16:12:38.820717   44323 round_trippers.go:306]     User-Agent: kubectl/v1.5.1+82450d0 (    darwin/amd64) kubernetes/82450d0
I1219 16:12:38.820731   44323 round_trippers.go:306]     Accept: application/json, */*
I1219 16:12:38.902256   44323 round_trippers.go:321] Response Status: 403 Forbidden in 81     milliseconds
I1219 16:12:38.902306   44323 round_trippers.go:324] Response Headers:
I1219 16:12:38.902327   44323 round_trippers.go:327]     Content-Type: text/plain; charset=utf-    8
I1219 16:12:38.902345   44323 round_trippers.go:327]     Content-Length: 31
I1219 16:12:38.902363   44323 round_trippers.go:327]     Date: Tue, 20 Dec 2016 00:12:38 GMT
I1219 16:12:38.902456   44323 request.go:904] Response Body: Forbidden: "/swaggerapi/api/v1"
I1219 16:12:38.902512   44323 request.go:995] Response Body: "Forbidden:     \"/swaggerapi/api/v1\""
F1219 16:12:38.903025   44323 helpers.go:116] error: error validating "/tmp/busybox.yml": error validating data: the server does not allow access to the requested resource; if you choose to ignore these errors, turn validation off with --validate=false

预期结果

预计会在dev命名空间中创建busybox pod。

其他详细信息：

$ kubectl version

Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.1+82450d0", GitCommit:"82450d03cb057bab0950214ef122b67c83fb11df", GitTreeState:"not a git tree", BuildDate:"2016-12-14T04:09:31Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"4", GitVersion:"v1.4.6", GitCommit:"e569a27d02001e343cb68086bc06d47804f62af6", GitTreeState:"clean", BuildDate:"2016-11-12T05:16:27Z", GoVersion:"go1.6.3", Compiler:"gc", Platform:"linux/amd64"}

GitHub问题：https://github.com/kubernetes/kubernetes/issues/38997
邮件列表帖子：https://groups.google.com/forum/#!topic/kubernetes-dev/6TBTu1AC2L8

编辑：基于答案和评论的工作解决方案

根据Jordan的回答，我升级到Kubernetes v1.5.1，然后得到以下两个YAML文件来构建命名空间和所有正确的RBAC资源，以便一切按预期工作：

system-access.yml（因为开箱即用的群集角色和群集角色绑定似乎不起作用）：

kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: system:node--kubelet
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node
subjects:
- kind: User
  name: kubelet
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: cluster-admin--kube-system:default
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: default
  namespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: system:node-proxier--kube-proxy
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:node-proxier
subjects:
- kind: User
  name: kube-proxy

dev-access.yml：

kind: Namespace
apiVersion: v1
metadata:
  name: dev
---
kind: Role
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  namespace: dev
  name: dev-all
rules:
  - apiGroups: ["*"]
    resources: ["*"]
    verbs: ["*"]
---
kind: RoleBinding
apiVersion: rbac.authorization.k8s.io/v1alpha1
metadata:
  name: dev-role-dev-all-members
  namespace: dev
subjects:
  - kind: Group
    name: dev
  - kind: Group
    name: system:serviceaccounts:dev
roleRef:
  kind: Role
  name: dev-all
  apiGroup: "rbac.authorization.k8s.io"

Answer 1

首先，您需要允许访问kubectl用于API发现和验证的URL（swagger，API组列表和资源类型等）。

最简单的方法是加载默认引导程序cluster roles和cluster role bindings：

kubectl create -f https://raw.githubusercontent.com/kubernetes/kubernetes/master/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml
kubectl create -f https://raw.githubusercontent.com/kubernetes/kubernetes/master/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-role-bindings.yaml

这将创建一个system:discovery ClusterRole并将所有用户（经过身份验证和未经身份验证的）绑定到它，允许他们访问swagger和API组信息。

其次，您不应在all群集角色绑定中包含开发服务帐户。这将允许该服务帐户（以及访问包含dev服务帐户凭据的dev命名空间中的机密的任何人）群集范围访问

如何使用RBAC API在Kubernetes中创建限制为命名空间的用户/组？

问题

尝试

实际结果

预期结果

其他详细信息：

1 个答案: