首页 > Web开发 > 详细

kubernetes创建用户

时间:2021-07-28 18:18:25      阅读:7      评论:0      收藏:0      [点我收藏+]

创建k8s User Account

使用openssl方法创建普通用户

准备工作

1
2
3
4
mkdir /root/pki/
将k8s ca.pem  ca-key.pem 证书拷贝到此目录
cp /opt/kubernetes/ssl/ca-key.pem  /root/pki/
cp /opt/kubernetes/ssl/ca.pem  /root/pki/

  

一、创建证书

1.创建user私钥

1
(umask077;openssl genrsa -out dev.key2048)

2.创建证书签署请求

 O=组织信息,CN=用户名

1
openssl req -new -key dev.key -out dev.csr -subj"/O=k8s/CN=dev"

3.签署证书

1
2
3
openssl  x509 -req -in dev.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out dev.crt -days365
Signature ok
subject=/O=k8s/CN=dev

二、创建配置文件

1
2
3
4
kubectl config set-cluster --kubeconfig=/PATH/TO/SOMEFILE      #集群配置
kubectl config set-credentials NAME --kubeconfig=/PATH/TO/SOMEFILE #用户配置
kubectl config set-context    #context配置
kubectl config use-context    #切换context
1
2
3
* --embed-certs=true的作用是不在配置文件中显示证书信息。
* --kubeconfig=/root/dev.conf用于创建新的配置文件,如果不加此选项,则内容会添加到家目录下.kube/config文件中,可以使用use-context来切换不同的用户管理k8s集群。
* context简单的理解就是用什么用户来管理哪个集群,即用户和集群的结合。

  

创建集群配置

1
2
3
4
kubectl config set-cluster k8s --server=https://192.168.124.61:6443 \
--certificate-authority=ca.pem \
--embed-certs=true  \
--kubeconfig=/root/dev.conf

  

创建用户配置

1
2
3
4
5
kubectl config set-credentials dev \
--client-certificate=dev.crt \
--client-key=dev.key \
--embed-certs=true \
--kubeconfig=/root/dev.conf

 

创建context配置

1
2
3
4
kubectl config set-context dev@k8s \
--cluster=k8s \
--user=dev \
--kubeconfig=/root/dev.conf

  

切换context

1
2
kubectl config use-context dev@k8s --kubeconfig=/root/dev.conf
kubectl config view --kubeconfig=/root/dev.conf

  

 

创建系统用户

1
2
3
4
5
useradd dev
mkdir -p /home/dev/.kube
cp /root/dev.conf /home/dev/.kube/config
chown dev.dev -R /home/dev/
su - dev

  

k8s验证文件

kubectl get pod

这个时候不成功是因为没有进行权限绑定

 

创建Role

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
root@k8s-master:~# cat > pods-reader.yaml <<EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: pods-reader
rules:
- apiGroups:
  -""
  resources:
  - pods
  verbs:
  - get
  - list
  - watch
 EOF

  

创建Rolebinding

用户dev和role pods-reader的绑定

1
2
3
4
5
6
7
8
9
10
11
12
13
14
root@k8s-master:~# cat >test-pods-reader.yaml <<EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: cbmljs-pods-reader
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: pods-reader
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: dev
EOF

   

到这一步就可以进行验证了

kubectl get pod

我们是可以查看查看default命名空间的pod,但是其他空间的pod是无法查看的。

创建ClusterRole

1
2
3
4
5
6
7
8
9
10
11
12
13
14
root@k8s-master:~# cat cluster-reader.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: cluster-reader
rules:
- apiGroups:
  -""
  resources:
  - pods
  verbs:
  - get
  - list
  - watch

创建ClusterRoleBinding

1
2
3
4
5
6
7
8
9
10
11
12
13
root@k8s-master:~# cat cbmljs-read-all-pod.yaml
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: billy-read-all-pods
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-reader
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: dev

验证结果

kubectl get pod --all-namespaces

就可以看到所有命名空间的pod了.

 

权限绑定指定的namespace

也可以使用下面方法进行绑定

 kubectl get clusterrole  查看系统自带角色

1
kubectl create rolebinding devuser-admin-rolebinding(rolebinding的名字) --clusterrole=admin(clusterrole的名字,admin在k8s所有namespace下都有最高权限) --user=devuser(将admin的权限赋予devuser用户) --namespace=dev(范围是dev这个namespace下) 即dev

 

扩展:

kubectl api-resources 可以查看apiGroups

示例:
创建集群角色

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
cat  clusterrole.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: test-clusterrole
rules:
  - apiGroups: [""]
    resources: ["pods"]
    verbs: ["get","list","watch","create","update","patch","delete"]
  - apiGroups: ["extensions","apps"]
    resources: ["deployments"]
    verbs: ["get","watch","list"]
  - apiGroups: [""]
    resources: ["pods/exec"]
    verbs: ["get","list","watch","create","update","patch","delete"]
  - apiGroups: [""]
    resources: ["pods/log"]
    verbs: ["get","list","watch","create","update","patch","delete"]
  - apiGroups: [""]
    resources: ["namespaces","namespaces/status"]
    verbs: ["*"]   # 也可以使用[‘*‘]
  - apiGroups: ["","apps","extensions","apiextensions.k8s.io"]
    resources: ["role","replicasets","deployments","customresourcedefinitions","configmaps"]
    verbs: ["*"]

  

  

  

 集群绑定

1
2
3
4
5
6
7
8
9
10
11
12
13
[root@master role]#  cat  test-classbind.yaml
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: test-all-pods
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: test-clusterrole
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: test

  

 

 

参考:

https://blog.csdn.net/cbmljs/article/details/102953428

  

kubernetes创建用户

原文:https://www.cnblogs.com/dahuige/p/15070971.html

(0)
(0)
   
举报
评论 一句话评论(0
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!