Kubernetes Kubelet安全认证连接Apiserver

Kubelet使用安全认证连接Apiserver，可以用Token或证书连接。配置步骤如下。

1，生成Token命令

head -c  /dev/urandom | od -An -t x | tr -d ' '

2，生成TLS证书

需要三个文件 ca.crt kubeadmin.crt kubeadmin.key

生成证书命令请参考http://www.cnblogs.com/birdstudio/p/7660068.html

3，配置Kubelet

KUBELET_ARGS="--bootstrap-kubeconfig=./kubeconfig"

kubeconfig文件

apiVersion: v1
kind: Config
preferences: {}
 
clusters:
- name: local
  cluster:
    server: https://39.108.97.109:6443
    certificate-authority: /root/kubernetes/ca.crt
 
users:
- name: kubelet-bootstrap
  user:
    token: 863f4582d6f5eb82a59089c971b785c3
  name: kubeadmin
  user:
    client-certificate: /root/kubernetes/kubeadmin.crt
    client-key: /root/kubernetes/kubeadmin.key
 
contexts:
- name: dev-frontend
  context:
    cluster: local
    user: kubeadmin
 
current-context: dev-frontend

参考资料

TLS Bootstrapping