Chefを使ったAWS環境構築の自動化

#パッケージレポジトリの登録
echo “deb http://apt.opscode.com/ `lsb_release -cs`-0.10 main” | tee /etc/apt/sources.list.d/opscode.list
#listの確認
cat /etc/apt/sources.list.d/opscode.list
deb http://apt.opscode.com/ precise-0.10 main
#キーの登録
mkdir -p /etc/apt/trusted.gpg.d
gpg –keyserver keys.gnupg.net –recv-keys 83EF826A
gpg –export packages@opscode.com | tee /etc/apt/trusted.gpg.d/opscode-keyring.gpg > /dev/null
apt-get update
apt-get install opscode-keyring #permanent upgradeable keyring
#システム全体のアップデート
apt-get upgrade
#クライアントの場合
apt-get install chef
#サーバの場合
apt-get install chef chef-server
#インストール中、URL of Chef Serverというプロンプトが出てくると思いますが、ここはChef ServerのURLを入力。
#ここではlocalhostのChef Serverを参照するものとして勧める
http://localhost:4000
#RabbitMQのパスワードの設定なども聞かれるが適宜入力
#インストール完了
chef-client -v

gem install knife-ec2
# knife-ec2コマンドを使用するユーザで
cd ~/.chef/

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

#ロールの決定(general|web|db)
role = ARGV[0]
if !role
  role = 'general'
end

#AWSのリージョン
REGION = 'us-east-1'
#AWSのアベイラビリティーゾーン
AVAILABILITY_ZONE = 'us-east-1b'

#一般サーバ（WEB・DB共通）の設定
general_server_set = {
  'role'           => 'general',
  'ami'            => 'ami-12345',
  'flavor'         => 'm1.small',
  'ssh_user'       => 'root',
  'ssh_key_file'   => '~/.ssh/dev_auth.pem',
  'security_group' => 'Development Servers',
  'ip'             => '111.111.111.111'
}
#Webサーバの設定
web_server_set = {
  'role'           => 'web',
  'ami'            => 'ami-23456',
  'flavor'         => 'm1.small',
  'ssh_user'       => 'root',
  'ssh_key_file'   => '~/.ssh/dev_auth.pem',
  'security_group' => 'Development Servers'
}

#DBサーバの設定
db_server_set = {
  'role'           => 'db',
  'ami'            => 'ami-34567',
  'flavor'         => 'm1.small',
  'ssh_user'       => 'root',
  'ssh_key_file'   => '~/.ssh/dev_auth.pem',
  'security_group' => 'Development Servers'
}

#設定の決定
case role
when 'general'
  server_set = general_server_set
when 'web'
  server_set = web_server_set
when 'db'
  server_set = db_server_set
end

#instance_idを取得する
chef_setup_cmd =<<"EOS"
knife ec2 server create\
    -r "role[#{server_set['role'].to_s}]"\
    --region #{REGION}\
    -Z #{AVAILABILITY_ZONE.to_s}\ 
    -I #{server_set['ami'].to_s}\
    -f #{server_set['flavor'].to_s}\
    -x #{server_set['ssh_user'].to_s}\
    -G '#{server_set['security_group'].to_s}'
EOS

chef_setup_cmd_result = `#{chef_setup_cmd}`
/Instance ID: (.*)\n/ =~chef_setup_cmd_result
instance_id = $1
if !instance_id
  exit(0)
end

#EC2 API ToolsでIP割り当て
ec2_cmd = "ec2-associate-address -i " + instance_id.to_s + " " + server_set['ip'].to_s
ec2_cmd_result = `#{ec2_cmd}`

#SSHアクセスしてchef-clientコマンドを実行
if server_set['ssh_user'].to_s!='root'
  add_cmd = 'sudo'
end
ssh_cmd =<<"EOS2"
/usr/bin/ssh -i #{server_set['ssh_key_file'].to_s}\
  #{server_set['ssh_user'].to_s}@#{server_set['ip'].to_s}\
  #{add_cmd} /usr/local/bin/chef-client
EOS2
ssh_cmd_result = `{#ssh_cmd}`

print instance_id + "\n"
print server_set['ip']

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

instance_id = ARGV[0]
if !instance_id
  print 'Empty Instance ID'
  exit(1)
end

ssh_cmd =<<"EOS2"
  knife ec2 server delete #{instance_id} --purge
EOS2
ssh_cmd_result = `#{ssh_cmd}`

print 'Terminate Success'