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OpenVPN Server Deployment with Docker Compose

OpenVPN server in a container running with Docker Compose.

Pre-requisites

  1. Docker Engine with Docker Compose plugin.
  2. A public DNS name or IP address for the OpenVPN server.

Docker Engine on Ubuntu

Follow the official Docker Engine installation guide for Ubuntu.

Copy Docker Compose File

Copy docker-compose.yml to the target server.

Configure Docker Compose

Edit docker-compose.yml and set VPN_HOSTNAME in the generate-config service:

VPN_HOSTNAME: vpn.example.com

Update the other variables in docker-compose.yml if you need to change the port, protocol, DNS server, or VPN network.

Generate OpenVPN Configuration Files and Certificates

Generate the OpenVPN server config. The server config files are created in ./ovpn0:

docker compose run --rm generate-config
docker compose run --rm init-pki
docker compose run --rm copy-server-files

Start the OpenVPN server:

docker compose up -d openvpn

The init-pki step is interactive because it asks for the CA password. For a fully non-interactive but less secure setup, run:

docker compose run --rm init-pki ovpn_initpki nopass

Create a Client

Generate a client configuration:

CLIENT_NAME=laptop0 docker compose run --rm add-client

The generated client file is written to:

ovpn0/laptop0.ovpn