Raketask: Create inet_interface for lxc containers.

attribute_default_resolv.yml.sample

# Please Modify.

resolvlines:
  - nameserver: 8.8.8.8
  - nameserver: 8.8.4.4
  - search: higanworks.com

attribute_defaultinetif.yml.sample

server01:
  - eth0:
      address: "192.168.0.1"
      netmask: "255.255.255.0"
  - eth1:
      address: "10.48.1.1"
      netmask: "255.255.255.192"
      gateway: "10.48.1.254"

server01:
  - eth0:
      address: "192.168.0.2"
      netmask: "255.255.255.0"
  - eth0:0:
      address: "192.168.0.3"
      netmask: "255.255.255.0"
  - eth1:
      address: "10.48.1.2"
      netmask: "255.255.255.0"
      gateway: "10.48.1.254"

Rakefile

## lxc-tool for natty
## Create inet_interface for lxc containers. (ignore the guest status)
## author sawanobori@higanworks.com
## Usage: rake conf_ip RAKE_ENV=environment (default=default)

require 'pp'
require 'erb'

LXC_DIR = "/var/lib/lxc/"
rake_env = ENV['RAKE_ENV'] || "dafault"

# network consts
INET_CONF = "/etc/network/interfaces"
INET_TPL = "./template/interfaces.erb"

## ls LXC_DIR, and remove /^./ Directories(files).
def getCTlist()
  tmp_list = Dir::entries(LXC_DIR)
  ct_list = []
  tmp_list.each do |ct|
    if ct !~ /^\./ then
      ct_list << ct
    end
  end
  return  ct_list
end


desc 'Create inet_interface for container.'
task :conf_ip do
  ct_list = getCTlist
  require 'yaml'
  settings = YAML.load_file("./attribute/#{rake_env}/inetif.yml")
  resolvconf = YAML.load_file("./attribute/#{rake_env}/resolv.yml")

  ct_list.each do |ct|
    # p ct
    if settings[ct] then
      puts "Setting up #{ct}..."
      conf_iface = ERB.new(File.read("./template/interface.erb"), nil, '%').result(binding)
      # puts file_iface
      tmp_dist =  LXC_DIR + ct + "/rootfs" + INET_CONF
      # puts tmp_dist
      file_iface = File.open(tmp_dist,'w')
      file_iface.puts conf_iface
      file_iface.close
      puts "  #{ct}: OverWritten #{tmp_dist}"


      ## OverWritten hosts
      tmp_dist =  LXC_DIR + ct + "/rootfs/etc/hosts"
      conf_hosts = ERB.new(File.read("./template/hosts.erb"), nil, '%').result(binding)
      file_hosts = File.open(tmp_dist,'w')
      file_hosts.puts conf_hosts
      file_hosts.close
      puts "  #{ct}: OverWritten #{tmp_dist}"

      ## OverWritten resolv.conf
      tmp_dist =  LXC_DIR + ct + "/rootfs/etc/resolv.conf"
      if File.symlink?(tmp_dist) then
        File.unlink(tmp_dist)
      end
      conf_resolv = ERB.new(File.read("./template/resolv.conf.erb"), nil, '%').result(binding)
      file_resolv = File.open(tmp_dist,'w')
      file_resolv.puts conf_resolv
      # puts conf_resolv
      file_resolv.close
      puts "  #{ct}: OverWritten #{tmp_dist}"
    end
  end
end

template_hosts.erb

# modified by mxenzai#lxc-tool with templatefile
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
127.0.0.1 localhost

template_interface.erb

auto lo
iface lo inet loopback

% settings[ct].each do |ifsets|
%   ifsets.each do |ifname, ifconfs|
<%= "auto " + ifname %>
<%= "iface " + ifname + " inet static" %>
%     ifconfs.each do |h, j|
<%= "  " + h + " " + j %>
%     end
<% %>
%   end
% end

template_resolv.conf.erb

# modified by giraffi#lxc-tool with templatefile
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
% resolvconf["resolvlines"].each do |line|
%   line.each do |item, value|
<%=   item + " " + value %>
%   end
% end

Replace filename. "_" -> "/"