k8s 创建UserAccount

参考：

https://kubernetes.io/docs/reference/access-authn-authz/certificate-signing-requests/#normal-user

1·创建个人证书

# 生成user私钥
openssl genrsa -out zhanglei.key 2048

# 创建证书签署请求
openssl req -new -key zhanglei.key -out zhanglei.csr -subj "/O=org/CN=neozhao"

# 使用集群证书签署个人证书
openssl x509 -req -in neozhao.csr -CA /etc/kubernetes/pki/ca.crt -CAkey /etc/kubernetes/pki/ca.key -CAcreateserial -out zhanglei.crt -days 365

2·生成配置文件

# 设置集群参数
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/pki/ca.crt \
  --embed-certs=true \
  --server=https://192.168.110.6:6443 \
  --kubeconfig=./config

# 设置客户端认证参数
kubectl config set-credentials zhanglei \
  --client-certificate=zhanglei.crt \
  --client-key=zhanglei.key \
  --embed-certs=true \
  --kubeconfig=./config

# 设置上下文参数
kubectl config set-context zhanglei-config \
  --cluster=kubernetes \
  --user=zhanglei \
  --kubeconfig=./config

# 设置默认上下文
kubectl config use-context zhanglei-config \
  --kubeconfig=./config

3.设置权限

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  namespace: loggie
  name: loggie-user-role
rules:
  - apiGroups:
      - ""
    resources:
      - nodes
      - pods/log
      - patch
      - update
    verbs:
      - get
      - watch
      - list
  - apiGroups:
      - ""
    resources:
      - pods
      - serviceaccounts
      - namespaces
    verbs:
      - get
      - watch
      - list
      - create
      - patch
      - update
      - delete
  - apiGroups:
    - apiextensions.k8s.io
    resources:
    - customresourcedefinitions
    verbs:
    - create
    - patch
    - update
    - get
    - list
    - watch
  - apiGroups:
    - rbac.authorization.k8s.io
    resources:
    - clusterrolebindings
    - clusterroles
    - serviceaccounts
    verbs:
    - create
    - patch
    - update
    - get
    - list
    - watch
    - delete
  - apiGroups:
      - ""
    resources:
      - events
      - configmaps
      - services
    verbs:
      - get
      - watch
      - list
      - update
      - create
      - patch
  - apiGroups:
      - extensions
      - apps
    resources:
      - deployments
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - apps
    resources:
      - daemonsets
    verbs:
      - get
      - list
      - watch
      - update
      - create
      - patch
      - delete
  - apiGroups:
      - loggie.io
    resources:
      - logconfigs
      - logconfigs/status
      - clusterlogconfigs
      - clusterlogconfigs/status
      - sinks
      - interceptors
    verbs:
      - get
      - list
      - watch
      - update
      - patch
  - apiGroups:
      - coordination.k8s.io
    resources:
      - leases
    verbs:
      - create
      - get
      - list
      - update

4.绑定权限

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: loggie-user-role-bind
  namespace: loggie
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: loggie-user-role
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: User
  name: loggie

5.非master节点创建用户

创建private key

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openssl genrsa -out john.key 2048
openssl req -new -key john.key -out john.csr -subj "/CN=john"
openssl req -in john.csr -text

任意用户创建CSR(CertificateSigningRequest)

cat <<EOF | kubectl apply -f -
apiVersion: certificates.k8s.io/v1
kind: CertificateSigningRequest
metadata:
  name: john
spec:
  request: $(cat john.csr | base64 | tr -d '\n')
  signerName: kubernetes.io/kube-apiserver-client
  usages:
  - client auth
EOF

kubectl get csr john

k8s管理员批准CSR，并导出证书

kubectl certificate approve john
kubectl get csr john -o jsonpath='{.status.certificate}'| base64 -d > john.crt