Configure Vagrant VMs using Ansible.

This way, Vagrant VMs and cloud-provided VMs are configured in the exact same way, hence avoiding configuration drift and subtle bugs associated to different versions of software.

test/Vagrantfile

@@ -3,55 +3,62 @@
 Vagrant.require_version ">= 1.7.0"
 
 # these ought to match what is in config.sh
-n_machines = 3
-ip_prefix = "192.168.48"
-ip_suffix_base = 10
+N_MACHINES = 3
+IP_PREFIX = '192.168.48'
+IP_SUFFIX_BASE = 10
 
 require File.expand_path(File.join(File.dirname(__FILE__), '..', 'vagrant-common.rb'))
 
-def configure_docker(host, hostname, ip)
-  pkgs = %w(docker-engine ethtool)
-
-  host.vm.box = VAGRANT_IMAGE
-
-  host.vm.provision :shell, :inline => "hostnamectl set-hostname "+hostname
-  host.vm.network "private_network", ip: ip
-
-  # Disable default Vagrant shared folder, which we don't need:
-  host.vm.synced_folder ".", "/vagrant", disabled: true
-
-  host.vm.provision :shell, :inline => "sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D"
-  host.vm.provision :shell, :inline => "echo deb https://apt.dockerproject.org/repo ubuntu-wily main > /etc/apt/sources.list.d/docker.list"
-
-  install_packages host.vm, pkgs
-  tweak_docker_daemon host.vm
-  cleanup host.vm
+def ip_address(i)
+  "#{IP_PREFIX}.#{IP_SUFFIX_BASE + i}"
 end
 
-def configure_resolv_conf(host)
-  # Fix the resolution errors by using 8.8.8.8
-  host.vm.provision :shell, :inline => "echo 'nameserver 8.8.8.8' > /etc/resolv.conf"
+def hostname(i)
+  "host#{i}"
 end
 
+ETC_HOSTS_ENTRIES = (1..N_MACHINES).map { |i| "#{ip_address(i)} #{hostname(i)}\n"}.join('')
 
 Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
+  (1..N_MACHINES).each do |i|
+    hostname = hostname(i)
+    config.vm.define hostname do |host|
+      host.vm.provider :virtualbox do |vb|
+        vb.name = hostname
+        vb.memory = 384
+        configure_nat_dns(vb)
+      end
 
-  config.vm.provider :virtualbox do |vb|
-    vb.memory = 384
-    configure_nat_dns(vb)
-  end
+      # Disable Vagrant 1.7 per host insecure key replacement
+      host.ssh.insert_key = false
 
-  # Disable Vagrant 1.7 per host insecure key replacement
-  config.ssh.insert_key = false
+      host.vm.box = VAGRANT_IMAGE
+      host.vm.network "private_network", ip: ip_address(i)
+      host.vm.hostname = hostname
 
-  (1..n_machines).each do |i|
-    config.vm.define "host#{i}" do |host|
-      ip_suffix = ip_suffix_base + i
-      configure_resolv_conf(host)
-      configure_docker(host, "host#{i}", "#{ip_prefix}.#{ip_suffix}")
+      host.vm.provision :shell, :inline => <<END
+# Tests rely on hostnames, so we remove potentially incorrect entries (e.g. localhost), and add mappings of IP addresses to hostnames:
+sed -i '/#{hostname}/d' /etc/hosts
+echo "#{ETC_HOSTS_ENTRIES}" >> /etc/hosts
+
+# Fix the resolution errors by using 8.8.8.8
+echo 'nameserver 8.8.8.8' > /etc/resolv.conf
+END
+
+      # Disable default Vagrant shared folder, which we don't need:
+      host.vm.synced_folder ".", "/vagrant", disabled: true
+
+      cleanup host.vm
+
+      # Only execute once the Ansible provisioner, when all the machines are up and ready:
+      if i == N_MACHINES
+        host.vm.provision 'ansible' do |ansible|
+          ansible.limit = 'all'  # Disable default limit to connect to all the machines
+          ansible.playbook = '../tools/config_management/setup_weave-net_test.yml'
+        end
+      end
     end
   end
-
 end
 
 begin