Can't configure easy-rsa as vars file didn't exist

Looks like in three this stuff changed. Tested this out and got it to work with openvpn so I believe what your looking for is...

 ./easyrsa init-pki
 ./easyrsa build-ca
 ./easyrsa gen-req server nopass
 ./easyrsa sign-req server server
  openssl dhparam -out dh2048.pem 2048

Some more reference on this.... https://community.openvpn.net/openvpn/wiki/EasyRSA3-OpenVPN-Howto