Docker bridged network over openvpn tunnel with DNS - hello world example

docker-compose.yml

version: "3.7"
services:
  dnsmasq:
    image: strm/dnsmasq
    networks:
      vpn:
        ipv4_address: 172.30.0.254
    cap_add:
      - NET_ADMIN

  hello-world:
    image: strm/helloworld-http
    container_name: hello.ZONE.jeffheidel.com
    networks:
      - vpn

networks:
  vpn:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: 172.30.0.0/24

etc openvpn server.conf

# Add this so that clients become aware of the route available through this machine
push "route 172.30.0.0 255.255.255.0"

# NOTE: clients may need to ignore redirect-gateway and dhcp-option if that's configured server-side

ROUTER_NOTES.md

1. Add VPN client connection to server
2. Add firewall forwarding rule for VPN traffic
3. Verify the 172.30.0.0/24 is in route table for VPN tun interface
4. Add DNS forwarding rule to dnsmasq /ZONE.jeffheidel.com/172.30.0.254