add(coreos-base/oem-vagrant): Import code from coreos-vagrant

Import override-plugin.rb and some VirtualBox fixups from our published
Vagrantfile repo. The current Vagrant OEM depends on this code, making
it impossible to boot without using our special Vagrantfile. Using the
box as a stand-alone entity worked up until recently and is something
users expect to work.

Also bump the minimum Vagrant version to 1.5, matching our current
documentation.

Fixes https://github.com/coreos/bugs/issues/5

sdk_container/src/third_party/coreos-overlay/coreos-base/oem-vagrant/files/box/Vagrantfile

@@ -1,11 +1,25 @@
-if Vagrant::VERSION < "1.2.3"
-  raise "Need at least vagrant version 1.2.3, please update"
+# -*- mode: ruby -*-
+# # vi: set ft=ruby :
+
+if Vagrant::VERSION < "1.5.0"
+  raise "Need at least vagrant version 1.5.0, please update"
 end
 
+require_relative 'override-plugin.rb'
+
 Vagrant.configure("2") do |config|
   # SSH in as the default 'core' user, it has the vagrant ssh key.
   config.ssh.username = "core"
 
   # Disable the base shared folder, guest additions are unavailable.
   config.vm.synced_folder ".", "/vagrant", disabled: true
+
+  config.vm.provider :virtualbox do |vb|
+    # Guest Additions are unavailable.
+    vb.check_guest_additions = false
+
+    # Fix docker not being able to resolve private registry in VirtualBox
+    vb.customize ["modifyvm", :id, "--natdnshostresolver1", "on"]
+    vb.customize ["modifyvm", :id, "--natdnsproxy1", "on"]
+  end
 end

sdk_container/src/third_party/coreos-overlay/coreos-base/oem-vagrant/files/box/override-plugin.rb

@@ -0,0 +1,117 @@
+# -*- mode: ruby -*-
+# # vi: set ft=ruby :
+
+# NOTE: This monkey-patching of the coreos guest plugin is a terrible
+# hack that needs to be removed once the upstream plugin works with
+# alpha CoreOS images.
+
+require 'tempfile'
+require 'ipaddr'
+require Vagrant.source_root.join("plugins/guests/coreos/cap/configure_networks.rb")
+
+BASE_CLOUD_CONFIG = <<EOF
+#cloud-config
+
+coreos:
+    units:
+      - name: coreos-cloudinit-vagrant-user.path
+        command: start
+        runtime: no
+        content: |
+          [Path]
+          PathExists=/var/lib/coreos-vagrant/vagrantfile-user-data
+      - name: coreos-cloudinit-vagrant-user.service
+        runtime: no
+        content: |
+          [Unit]
+          ConditionFileNotEmpty=/var/lib/coreos-vagrant/vagrantfile-user-data
+
+          [Service]
+          Type=oneshot
+          EnvironmentFile=/etc/environment
+          ExecStart=/usr/bin/coreos-cloudinit --from-file /var/lib/coreos-vagrant/vagrantfile-user-data
+          RemainAfterExit=yes
+EOF
+
+NETWORK_UNIT = <<EOF
+      - name: %s
+        runtime: no
+        content: |
+          [Match]
+          Name=%s
+
+          [Network]
+          Address=%s
+EOF
+
+# Borrowed from http://stackoverflow.com/questions/1825928/netmask-to-cidr-in-ruby
+IPAddr.class_eval do
+  def to_cidr
+    self.to_i.to_s(2).count("1")
+  end
+end
+
+module VagrantPlugins
+  module GuestCoreOS
+    module Cap
+      class ConfigureNetworks
+        include Vagrant::Util
+
+        def self.configure_networks(machine, networks)
+          cfg = BASE_CLOUD_CONFIG
+          machine.communicate.tap do |comm|
+
+            # Read network interface names
+            interfaces = []
+            comm.sudo("ifconfig | grep enp0 | cut -f1 -d:") do |_, result|
+              interfaces = result.split("\n")
+            end
+
+            ip = ""
+
+            # Configure interfaces
+            # FIXME: fix matching of interfaces with IP adresses
+            networks.each do |network|
+              iface_num = network[:interface].to_i
+              iface_name = interfaces[iface_num]
+              cidr = IPAddr.new('255.255.255.0').to_cidr
+              address = "%s/%s" % [network[:ip], cidr]
+              unit_name = "50-%s.network" % [iface_name]
+              unit = NETWORK_UNIT % [unit_name, iface_name, address]
+
+              cfg = "#{cfg}#{unit}"
+              ip = network[:ip]
+            end
+
+            cfg = <<EOF
+#{cfg}
+write_files:
+  - path: /etc/environment
+    content: |
+      COREOS_PUBLIC_IPV4=#{ip}
+      COREOS_PRIVATE_IPV4=#{ip}
+
+hostname: #{machine.name}
+EOF
+
+            temp = Tempfile.new("coreos-vagrant")
+            temp.binmode
+            temp.write(cfg)
+            temp.close
+
+            comm.upload(temp.path, "/tmp/user-data")
+            comm.sudo("mkdir -p /var/lib/coreos-vagrant")
+            comm.sudo("mv /tmp/user-data /var/lib/coreos-vagrant/")
+
+          end
+        end
+      end
+
+      class ChangeHostName
+        def self.change_host_name(machine, name)
+          # This is handled in configure_networks
+        end
+      end
+    end
+  end
+end