4.1 setting up experimental environment of docker network


Build two virtual machines, which can ping each other or the host. Vagrantfile is configured as follows:

# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.require_version ">= 1.6.0"
boxes = [
        :name => "docker-node1",
        :eth1 => "",
        :mem => "1024",
        :cpu => "1"
        :name => "docker-node2",
        :eth1 => "",
        :mem => "1024",
        :cpu => "1"
Vagrant.configure(2) do |config|
  config.vm.box = "centos/7"
  boxes.each do |opts|
      config.vm.define opts[:name] do |config|
      config.vm.hostname = opts[:name]
      config.vm.provider "virtualbox" do |v|
        v.customize ["modifyvm", :id, "--memory", opts[:mem]]
        v.customize ["modifyvm", :id, "--cpus", opts[:cpu]]
      config.vm.network :private_network, ip: opts[:eth1]
  config.vm.synced_folder "./labs", "/home/vagrant/labs", :nfs => true
  config.vm.provision "shell", privileged: true, path: "./setup.sh"

The contents of setup.sh are as follows

#!/usr/bin/env bash
# install some tools
sudo yum install -y git vim gcc glibc-static telnet bridge-utils
# install docker
curl -fsSL get.docker.com -o get-docker.sh
sh get-docker.sh
# start docker service
sudo groupadd docker
sudo usermod -aG docker vagrant
sudo systemctl start docker
rm -rf get-docker.sh

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