Chef - 蓝图

在 Chef 中，蓝图是用于查找和记录服务器上具体内容的工具。蓝图记录所需的所有内容，例如控制器、包、配置文件等。蓝图能够以各种格式拆分服务器信息。其中一种格式是 Chef Kitchen（配方）。这有助于使用 Chef 配置唯一的服务器。

工作方法

我们需要在需要运行蓝图的节点上安装 Python 和 Git。

步骤 1 − 安装蓝图。

vipin@server:~$ pip install blueprint

步骤 2 − 创建蓝图。

user@server:~$ sudo blueprint create internal-cookbook 
# [blueprint] using cached blueprintignore(5) rules 
# [blueprint] searching for Python packages 
# [blueprint] searching for PEAR/PECL packages 
# [blueprint] searching for Yum packages 
# [blueprint] searching for Ruby gems 
# [blueprint] searching for npm packages 
# [blueprint] searching for software built from source 
# [blueprint] searching for configuration files 
# [blueprint] /etc/ssl/certs/AC_Ra\xc3\xadz_Certic\xc3\ 
xa1mara_S.A..pem not UTF-8 - skipping it 
# [blueprint] /etc/ssl/certs/NetLock_Arany_=Class_Gold=_F\xc5\ 
x91tan\xc3\xbas\xc3\xadtv\xc3\xa1ny.pem not UTF-8 - skipping it 
# [blueprint] /etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_Sa\ 
xc4\x9flay\xc4\xb1c\xc4\xb1s\xc4\xb1.pem not UTF-8 - skipping it 
# [blueprint] /etc/ssl/certs/Certinomis_-_Autorit\xc3\xa9_Racine. 
pem not UTF-8 - skipping it 
# [blueprint] /etc/ssl/certs/T\xc3\x9cB\xc4\xb0TAK_UEKAE_K\xc3\ 
xb6k_Sertifika_Hizmet_Sa\xc4\x9flay\xc4\xb1c\xc4\xb1s\xc4\xb1_-_S\ 
xc3\xbcr\xc3\xbcm_3.pem not UTF-8 - skipping it 
# [blueprint] searching for APT packages 
# [blueprint] searching for service dependencies

步骤 3 − 根据蓝图创建Cookbook（食谱）。

user@server:~$ blueprint show -C internal-cookbook my-server/recipes/default.rb

步骤 4 − 验证生成文件的内容。

user@server:~$ cat internal-cookbook /recipes/default.rb 
# 
# Automatically generated by blueprint(7). Edit at your own risk. 
# 
cookbook_file('/tmp/96468fd1cc36927a027045b223c61065de6bc575.tar') 
do 
   backup false 
   group 'root' 
   mode '0644' 
   owner 'root' 
   source 'tmp/96468fd1cc36927a027045b223c61065de6bc575.tar' 
end 
execute('/tmp/96468fd1cc36927a027045b223c61065de6bc575.tar') do 
   command 'tar xf "/tmp/96468fd1cc36927a027045b223c61065de6bc575.tar"' 
   cwd '/usr/local' 
end 
directory('/etc/apt/apt.conf.d') do 
...TRUNCATED OUTPUT... 
service('ssh') do 
   action [:enable, :start] 
   subscribes :restart, resources('cookbook_file[/etc/default/ 
      keyboard]', 'cookbook_file[/etc/default/console-setup]', 
      'cookbook_file[/etc/default/ntfs-3g]', 'package[openssh-server]', 
      'execute[96468fd1cc36927a027045b223c61065de6bc575.tar]') 
end

工作流脚本

Blueprint 是一个 Python 包，它找出服务器的所有相关配置数据并将其存储在 Git 存储库中。每个蓝图都有自己的名称。

可以要求蓝图以各种格式显示其 Git 存储库的内容。

user@server:~$ ls -l internal-cookbook / 
total 8 
drwxrwxr-x 3 vagrant vagrant 4096 Jun 28 06:01 files 
-rw-rw-r-- 1 vagrant vagrant 0 Jun 28 06:01 metadata.rb 
drwxrwxr-x 2 vagrant vagrant 4096 Jun 28 06:01 recipes 

Blueprints 显示命令

user@server:~$ blueprint show-packages my-server
...TRUNCATED OUTPUT...
apt wireless-regdb 2011.04.28-1ubuntu3
apt zlib1g-dev 1:1.2.3.4.dfsg-3ubuntu4
python2.7 deliver 0.6.45
python2.7 pip 1.3.1
pip blueprint 3.4.2
pip virtualenv 1.9.1

上述命令显示所有已安装的软件包。其他显示命令如下 −

• show-files
• show-services
• show-sources