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Tunnel Container Setup

Description

This container will auto-build and then auto-run every time you start Docker.

The container allows the host macOS/Windows system to access all containers directly using the 172.17.0.0/24 IP addresses. This makes it possible to run a client application on your macOS/Windows system and connect to the cluster that is running in the containers (deployed in Docker using AeroLab).

Initial container deployment

  1. Use the docker ps command to check that no other Docker containers are running.
  2. Run the following commands from the terminal command line:
git clone https://github.com/aerospike/aerolab
cd aerolab/tunnel-container-openvpn/build-run
chmod 755 *sh && ./RUNME.sh

Initial host system setup

macOS

  1. Download Tunnelblick, install and start it.
  2. From the taskbar menu, click on VPN Details.
  3. In the Finder, navigate to the aerolab/tunnel-container-openvpn/build-run/keys directory.
  4. Drag and drop the file client.conf to the Configurations pane of the Tunnelblick window.
  5. Choose either Only Me or All Users.
  6. Close the Tunnelblick window.

Windows

  1. Download OpenVPN Connect, install and start it.
  2. Click the Plus button.
  3. Click Import from file.
  4. Rename aerolab/tunnel-container-openvpn/build-run/keys/client.conf to aerolab/tunnel-container-openvpn/build-run/keys/client.ovpn.
  5. Drag and drop the file aerolab/tunnel-container-openvpn/build-run/keys/client.ovpn into the OpenVPN window and click Add.
  6. Save and close the window.

Usage following installation

Once Docker is started on macOS/Windows, click on the OpenVPN Connect or Tunnelblick icon in the taskbar, and click Connect.

NOTE: on first run you may get two warnings, one about DNS not changing and one about IPs not changing. This is normal, as we are not tunneling anything apart from/to Docker traffic. Click on Do not warn ... on both warning windows and click OK.

Technical details

This procedure installs OpenVPN Server (with all the bells and whistles of configuration), generates CA/server/client certificates and exports the certificates to the host machine. The server configuration has a route to force the Docker IP address range of 172.17.0.0/16 to go through this VPN tunnel. Tunnelblick and OpenVPN Connect are GUIs for OpenVPN, allowing you to connect to the OpenVPN server in a container from the OpenVPN client on your host machine and allowing a 172.17.0.0/16 route to traverse through.