OpenVPN

#Create and initialize openvpn
docker run --rm -v $PWD:/etc/openvpn kylemanna/openvpn ovpn_genconfig -u udp://[IP address or domain name of your server]:1194

#In the below step, you have to provide a password for CA and key
docker run --rm -v $PWD:/etc/openvpn -it kylemanna/openvpn ovpn_initpki

#Create User Account. Password provided in this step is required at the time of connection from client
docker run --rm -v $PWD:/etc/openvpn -it kylemanna/openvpn easyrsa build-client-full larry

# Copy client certificate to host from container
docker run --rm -v $PWD:/etc/openvpn kylemanna/openvpn ovpn_getclient larry > larry.ovpn

#Start OpenVPN container
docker run --name openvpn -v $PWD:/etc/openvpn -d -p 1194:1194/udp --cap-add=NET_ADMIN --restart always kylemanna/openvpn

Modofy config file:

docker exec -it openvpn bash
apk update -y
apk add nano -y

cd /etc/openvpn
nano openvpn.conf