报这个错误是因为centos7 自带的ssl 是1.0的，需要你安装1.1的
yum -y install wget net-tools telnet bind-utils vim chrony tree psmisc bash-completion ntp gcc
wget https://www.openssl.org/source/openssl-1.1.1g.tar.gz –no-check-certificate
tar -xvf openssl-1.1.1g.tar.gz
cd openssl-1.1.1g
./config shared –openssldir=/usr/local/openssl –prefix=/usr/local/openssl
make && make install
echo “/usr/local/lib64/” >> /etc/ld.so.conf
ldconfig
mv /usr/bin/openssl /usr/bin/openssl.old
mv /usr/lib/openssl /usr/lib/openssl.old
ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/openssl/include/openssl /usr/include/openssl
echo “/usr/local/openssl/lib” >> /etc/ld.so.conf
ldconfig -v
执行下面的命令查看下，会发现已经更新成为新的1.1了
openssl version