Vagrantfile to route network traffic w/o sshuttle

README.md

Juju Vagrant without sshuttle.

sshuttle allows traffic to be routed to the internal network (10.0.3.0) used for the lxc containers inside a Juju Vagrant image. sshuttle does not work with OS X 10.10 (Yosemite). This alternate solution alters your local network routing rules in order to communicate directly with the virtual machine over its vboxnet0 bridge. It's also faster than using sshuttle, because it doesn't need to proxy over an SSH tunnel or teardown/reassemble the TCP packets.

This approach adds and removes the route when a virtual machine is brought up and taken down, and requires sudo at each step. Alternatively, you could add this route at boot or via login script.

Installation

You'll need to have the triggers plugin installed for this to work.

vagrant plugin install vagrant-triggers

Add the config.trigger rules in your Vagrantfile:

config.trigger.after [:provision, :up, :reload] do
    system('sudo route add -net 10.0.3.0/24 172.16.250.15 >/dev/null')
end

config.trigger.after [:halt, :destroy] do
    system('sudo route delete -net 10.0.3.0/24 172.16.250.15 >/dev/null')
end

Optionally, add a sudoer role so you don't have to enter your password each time:

user ALL=(ALL) NOPASSWD: /sbin/route

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

  # Every Vagrant virtual environment requires a box to build off of.
  config.vm.box = "trusty"
  config.vm.box_url = "http://cloud-images.ubuntu.com/vagrant/trusty/current/trusty-server-cloudimg-amd64-juju-vagrant-disk1.box"

  config.vm.provider :virtualbox  do |vb|

    # Default ram is 2G. Tried w/4G but may be running into issues with VM locking when host mem is exhausted
    vb.customize ["modifyvm", :id, "--memory", 4096]

    # increase the cpu cap
    vb.customize ["modifyvm", :id, "--cpuexecutioncap", "50"]

  end

  ###########################################################
  # Configure routing so we can connect to lxc w/o sshuttle #
  # $ vagrant plugin install vagrant-triggers               #
  ###########################################################
  config.trigger.after [:provision, :up, :reload] do
      system('sudo route add -net 10.0.3.0/24 172.16.250.15 >/dev/null')
  end

  config.trigger.after [:halt, :destroy] do
    system('sudo route delete -net 10.0.3.0/24 172.16.250.15 >/dev/null')
  end

end