Tunnel or SSL Forbidden

1. Introduction
There is an error when etcd cluster

failed to check the health of member 1b1bdf1904a03663 on https://10.225.86.104:2379: Get https://10.225.86.104:2379/health: Tunnel or SSL Forbidden
member 1b1bdf1904a03663 is unreachable: [https://10.225.86.104:2379] are all unreachable
failed to check the health of member 833c06816c7d7844 on https://10.225.86.105:2379: Get https://10.225.86.105:2379/health: Tunnel or SSL Forbidden
member 833c06816c7d7844 is unreachable: [https://10.225.86.105:2379] are all unreachable

The reason for the error is that openssl is not installed, so the server cannot enable ssl authentication access

yum install openssl
yum install openssl-devel