kubernetes更新证书

# 查看证书过期时间
kubeadm alpha certs check-expiration
# 更新证书
kubeadm alpha certs renew all
# 证书如果没有生效,重启相关服务生效
docker ps | grep -E 'k8s_kube-apiserver|k8s_kube-controller-manager|k8s_kube-scheduler|k8s_etcd_etcd' | awk -F ' ' '{print $1}' | xargs docker restart