# cd

# wget https://dl.k8s.io/v1.8.6/kubernetes-client-linux-amd64.tar.gz

# tar -xzvf kubernetes-client-linux-amd64.tar.gz

# sudo cp kubernetes/client/bin/kube* /usr/local/bin/

# chmod a+x /usr/local/bin/kube*

# export PATH=/root/local/bin:$PATH

创建/root/.kube/config

# 设置集群参数,--server指定Master节点ip
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://192.168.161.161:6443

# 设置客户端认证参数
kubectl config set-credentials admin \
  --client-certificate=/etc/kubernetes/ssl/admin.pem \
  --embed-certs=true \
  --client-key=/etc/kubernetes/ssl/admin-key.pem

# 设置上下文参数
kubectl config set-context kubernetes \
  --cluster=kubernetes \
  --user=admin

# 设置默认上下文
kubectl config use-context kubernetes

注意：如上是注解，标注是后期更清晰些。

admin.pem 证书 O 字段值为 system:masters，kube-apiserver 预定义的 RoleBinding cluster-admin 将 Group system:masters 与 Role cluster-admin 绑定，该 Role 授予了调用kube-apiserver 相关 API 的权限

创建bootstrap.kubeconfig

kubelet访问kube-apiserver的时候是通过bootstrap.kubeconfig进行用户验证。

//生成token 变量
# export BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')

# cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

# mv token.csv /etc/kubernetes/

//设置集群参数--server为master节点ip
# kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://192.168.161.161:6443 \
  --kubeconfig=bootstrap.kubeconfig

//设置客户端认证参数
# kubectl config set-credentials kubelet-bootstrap \
  --token=${BOOTSTRAP_TOKEN} \
  --kubeconfig=bootstrap.kubeconfig

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

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

# mv bootstrap.kubeconfig /etc/kubernetes/

创建kube-proxy.kubeconfig

# 设置集群参数 --server参数为master ip
kubectl config set-cluster kubernetes \
  --certificate-authority=/etc/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=https://192.168.161.161:6443 \
  --kubeconfig=kube-proxy.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials kube-proxy \
  --client-certificate=/etc/kubernetes/ssl/kube-proxy.pem \
  --client-key=/etc/kubernetes/ssl/kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig

# 设置上下文参数
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig

//设置默认上下文
# kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

# mv kube-proxy.kubeconfig /etc/kubernetes/

设置集群参数和客户端认证参数时 –embed-certs 都为 true，这会将 certificate-authority、client-certificate 和 client-key 指向的证书文件内容写入到生成的 kube-proxy.kubeconfig 文件中；

kube-proxy.pem 证书中 CN 为 system:kube-proxy，kube-apiserver 预定义的 RoleBinding cluster-admin 将User system:kube-proxy 与 Role system:node-proxier 绑定，该 Role 授予了调用 kube-apiserver Proxy 相关 API 的权限；

生成的bootstrap.kubeconfig，kube-proxy.kubeconfig文件拷贝到其它node节点的/etc/kubernetes目录下

# scp /etc/kubernetes/kube-proxy.kubeconfig node01:/etc/kubernetes/
# scp /etc/kubernetes/bootstrap.kubeconfig  node01:/etc/kubernetes/

# scp /etc/kubernetes/kube-proxy.kubeconfig node02:/etc/kubernetes/
# scp /etc/kubernetes/bootstrap.kubeconfig  node02:/etc/kubernetes/