scottslowe-learning-tools/docker-ipvlan

Using ipvlan Interfaces with Docker Containers

These files were created to allow users to use Vagrant (http://www.vagrantup.com) to build an environment for working with Docker containers using ipvlan interfaces. This configuration was tested using Vagrant 1.8.1, VMware Fusion 8.1.0, and version 4.0.5 of the Vagrant VMware plugin.

Contents

• machines.yml: This is a YAML file containing the configuration data used by Vagrant when creating and provisioning VMs. This particular Vagrant environment requires six (6) values in this file for each VM: name (name to be assigned to the box as well as used for hostname), box (the name of the Vagrant box), ram (desired RAM), vcpu (number of virtual CPUs), ip_addr (the private IP address to be assigned to the second network interface; also controls whether a second interface is provisioned), and docker (set to "true" or "false"; controls whether Vagrant provisions Docker onto the VM).

• README.md: The file you're currently reading.

• Vagrantfile: This file is used by Vagrant to spin up the virtual machines for this environment. No changes need to be made to this document, as all the configuration data is found in other files (like machines.yml). However, if you are using a virtualization solution other than VMware Fusion, you might need to make changes to this file.

Instructions

These instructions assume you've already installed VMware Fusion, Vagrant, and the Vagrant VMware plugin. Please refer to the documentation for those products for more information on installation or configuration. Note that Internet access is required when using vagrant up to create this environment.

1. Use vagrant box add to install both an Ubuntu 15.04 x86_64 box and an Ubuntu 14.04 x86_64 Vagrant box. I have an Ubuntu 14.04 x86_64 base box you can use; to use my base box, add the box with vagrant box add slowe/ubuntu-trusty-x64. A Vagrant box you might consider using for Ubuntu 15.04 is the bento/ubuntu-15.04 box.

2. Place the files from the docker-ipvlan directory of this GitHub repository into a directory on your local system. You can clone the entire "learning-tools" repository (using git clone) or just download the specific files from the the docker-ipvlan folder.

3. If necessary, edit machines.yml to specify the name of the Vagrant boxes downloaded in step 1. The VM definition for "docker-01" must use Ubuntu 15.04; the other VM may use any version of Ubuntu you prefer. You may also make changes to the private IP addresses or the RAM/CPU settings, although no changes are typically required.

4. Run vagrant up to instantiate the learning environment. This will spin up two (2) VMs based on the Vagrant boxes you downloaded in step 1 and specified in machines.yml in step 3. Vagrant will also appropriately configure each VM and start the necessary services. Depending on the speed of your system and your Internet connection, this may take a few minutes.

5. Use vagrant ssh docker-01 to connect to the first Docker host and run the following commands to download and install the ipvlan plugin for Docker:

    git clone https://github.com/gopher-net/ipvlan-docker-plugin.git
    cd ipvlan-docker-plugin/binaries
    sudo ./ipvlan-docker-plugin-0.2-Linux-x86_64 \
    --ipvlan-subnet "192.168.100.0/24" \
    --gateway "192.168.100.1" --mode "l2" \
    --host-interface "eth1" -d &
   

   If you changed the private IP addresses in machines.yml, be sure to supply the appropriate IP address ranges from that file in the command above.

6. Run this command to create a network using the ipvlan plugin:

    docker network create -d ipvlan --subnet=192.168.100.0/24 \
    --gateway=192.168.100.1 -o host_iface=eth1 -o mode=l2 testnet
   

   Note that the subnet, gateway, host interface, and mode specified here need to match what was provided when the plugin was launched in step 5.

7. Launch a Docker container attached to this new network with this command line:

    docker run -it --rm --net=testnet ubuntu
   

   This will drop you at a root prompt for an Ubuntu container. Use ip addr list to determine the IP address assigned to this container.

8. In a separate terminal window, switch to the directory where the files for this environment are stored and connect to the remote VM using vagrant ssh remote-01.

9. In the remote VM, ping the IP address of the container (obtained in step 7 when you launched the container).

10. From the container prompt, ping the IP address assigned to the remote VM (by default, 192.168.100.101).

Enjoy!