Class: Linecook::AmiPacker

Inherits:
Object
  • Object
show all
Includes:
Downloader, Locking
Defined in:
lib/linecook-gem/packager/packer.rb

Constant Summary collapse

SOURCE_URL = 
'https://releases.hashicorp.com/packer/'
PACKER_VERSION = 
'0.12.0'
PACKER_PATH = 
File.join(Linecook::Config::LINECOOK_HOME, 'bin', 'packer')
PRE_MOUNT_COMMANDS = 
[
  'parted -s {{.Device}} mklabel msdos',
  'parted -s {{.Device}} mkpart primary ext2 0% 100%',
  'mkfs.ext4 {{.Device}}1',
  'tune2fs -L cloudimg-rootfs {{.Device}}1',
]
POST_MOUNT_COMMANDS = 
[
  'tar -C {{.MountPath}} -xpf {{ user `source_image_path` }}',
  'cp /etc/resolv.conf {{.MountPath}}/etc',
  'echo "LABEL=cloudimg-rootfs   /        ext4   defaults,discard        0 0" > {{.MountPath}}/etc/fstab',
  'grub-install --root-directory={{.MountPath}} {{.Device}}',
  'rm -rf {{.MountPath}}/etc/network',
  'cp -r /etc/network {{.MountPath}}/etc/',
]
ROOT_DEVICE_MAP = 
{
  device_name: 'xvda',
  delete_on_termination: true
}
BUILDER_CONFIG = 
{
  type: 'amazon-chroot',
  access_key: '{{ user `aws_access_key` }}',
  secret_key: '{{ user `aws_secret_key` }}',
  ami_name: 'packer-image.{{ user `image_name` }} {{timestamp}}',
  from_scratch: true,
  root_device_name: ROOT_DEVICE_MAP[:device_name],
  ami_block_device_mappings: [ ROOT_DEVICE_MAP ],
  pre_mount_commands: PRE_MOUNT_COMMANDS,
  post_mount_commands: POST_MOUNT_COMMANDS,
}.freeze
CHROOT_COMMANDS = 
[
  'apt-get update',
  'DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -y --force-yes --no-upgrade install grub-pc grub-legacy-ec2',
  'update-grub',
  'rm -f /etc/init/fake-container-events.conf', # HACK
  'DEBIAN_FRONTEND=noninteractive dpkg-reconfigure resolvconf' # re-linkify resolvconf
]

Constants included from Downloader

Downloader::LOCK_WAIT_TIMEOUT

Instance Method Summary collapse

Methods included from Locking

#clear_lock, #lock, #lock_path, #lockfile, #unlock

Methods included from Downloader

#download, #unzip

Constructor Details

#initialize(config) ⇒ AmiPacker

Returns a new instance of AmiPacker.



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# File 'lib/linecook-gem/packager/packer.rb', line 66

def initialize(config)
  system("#{packer_path} --version")
  @hvm = config[:hvm] || true
  @root_size = config[:root_size] || 10
  @region = config[:region] || 'us-east-1'
  @copy_regions = config[:copy_regions] || []
  @accounts = config[:account_ids] || []
  @write_txt = Linecook.config[:packager] && Linecook.config[:packager][:ami] && Linecook.config[:packager][:ami][:update_txt]
end

Instance Method Details

#package(image, directory) ⇒ Object 



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# File 'lib/linecook-gem/packager/packer.rb', line 76

def package(image, directory)
  @image = image
  kitchen_config = load_config(directory).send(:data).instance_variable_get(:@data)
  image_config = kitchen_config[:suites].find{ |x| x[:name] == image.name }
  if image_config && image_config[:packager]
    packager = image_config[:packager] || {}
  end
  conf_file = Tempfile.new("#{@image.id}-packer.json")
  config = generate_config(packager)
  conf_file.write(config)
  conf_file.close
  output = []
  PTY.spawn("sudo #{PACKER_PATH} build -machine-readable #{conf_file.path}") do |stdout, _, _|
    begin
      stdout.each do |line|
        output << line if line =~ /artifact/
        tokens = line.split(',')
        if tokens.length > 4
          out = tokens[4].gsub('%!(PACKER_COMMA)', ',')
          time = DateTime.strptime(tokens[0], '%s').strftime('%c')
          puts "#{time} | #{out}"
        else
          puts "unexpected output format"
          puts tokens
        end
      end
    rescue Errno::EIO
      puts "Packer finshed executing"
    end
  end
  extract_amis_from_output(output)
ensure
  conf_file.close
  conf_file.unlink
end