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[原创]Chef Cookbook 05.Facebook cookbook之fb_motd学习

2016-05-31

学习Facebook的cookbook是一个学习chef的途径之一。 Chef is being used very widely. One of chef’s biggest customers is Facebook. Many Internet companies and enterprises use chef today to automate their infrastructure environments.

fb_motd如下结构

[root@workstation fb_motd]# pwd
/root/chef-cookbooks-master/cookbooks/fb_motd
[root@workstation fb_motd]# ls -ltr
total 8
drwxrwxr-x. 3 root root  20 May 20 19:53 templates
-rw-rw-r--. 1 root root 305 May 20 19:53 README.md
-rw-rw-r--. 1 root root 342 May 20 19:53 metadata.rb
drwxrwxr-x. 2 root root  23 May 31 12:08 attributes
drwxrwxr-x. 2 root root  23 May 31 12:10 recipes
[root@workstation fb_motd]# tree
.
|-- attributes
|   `-- default.rb
|-- metadata.rb
|-- README.md
|-- recipes
|   `-- default.rb
`-- templates
    `-- default
	`-- motd.erb

4 directories, 5 files
[root@workstation fb_motd]# 

attributes属性文件default追加了extra_lines的value内容和新加了my_lines的Key-Value内容

[root@workstation fb_motd]# cat attributes/default.rb 
# vim: syntax=ruby:expandtab:shiftwidth=2:softtabstop=2:tabstop=2
# Copyright (c) 2016-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree. An additional grant
# of patent rights can be found in the PATENTS file in the same directory.
#
default['fb_motd'] = {
#  'extra_lines' => [],
  'extra_lines' => ['helloworld'],
  'my_lines' => ['my name is abc.','nice to meet you'],
}
[root@workstation fb_motd]# 

template追加my_lines属性内容显示

[root@workstation fb_motd]# cat templates/default/motd.erb 
<% node['fb_motd']['extra_lines'].each do |line| -%>
<%=  line %>
<% end -%>
<% node['fb_motd']['my_lines'].each do |line| -%>
<%=  line %>
<% end -%>
[root@workstation fb_motd]# 

菜单不修改

[root@workstation fb_motd]# cat recipes/default.rb  | grep -v ^# | grep -v ^$
template '/etc/motd' do
  not_if { node['motd_exempt'] }
  group 'root'
  mode '0644'
  owner 'root'
  source 'motd.erb'
end
[root@workstation fb_motd]# 

应用菜单

上传测试

上传更新后的 cookbook

[root@workstation fb_motd]# knife cookbook upload fb_motd
Uploading fb_motd        [0.0.1]
Uploaded 1 cookbook.
[root@workstation fb_motd]# 

为chefclient节点run_list追加菜单

[root@workstation fb_motd]# knife node show chefclient
Node Name:   chefclient
Environment: _default
FQDN:        chefclient
IP:          192.168.122.136
Run List:    
Roles:       
Recipes:     fb_motd, fb_motd::default
Platform:    centos 7.2.1511
Tags:        
[root@workstation fb_motd]# 
[root@workstation fb_motd]# knife node run_list add chefclient fb_motd
chefclient:
  run_list: recipe[fb_motd]
[root@workstation fb_motd]# 

查看确认chefclient节点信息

[root@workstation fb_motd]# knife node show chefclient
Node Name:   chefclient
Environment: _default
FQDN:        chefclient
IP:          192.168.122.136
Run List:    recipe[fb_motd]
Roles:       
Recipes:     fb_motd, fb_motd::default
Platform:    centos 7.2.1511
Tags:        
[root@workstation fb_motd]# 

节点获取菜单点菜

[root@chefclient ~]# ls -ltr /etc/motd
ls: cannot access /etc/motd: No such file or directory
[root@chefclient ~]# chef-client
Starting Chef Client, version 12.10.24
resolving cookbooks for run list: ["fb_motd"]
Synchronizing Cookbooks:
  - fb_motd (0.0.1)
Installing Cookbook Gems:
Compiling Cookbooks...
Converging 1 resources
Recipe: fb_motd::default
  * template[/etc/motd] action create
    - create new file /etc/motd
    - update content in file /etc/motd from none to 49567c
    --- /etc/motd	2016-05-31 12:08:47.776000000 -0400
    +++ /etc/.chef-motd20160531-18528-15sl3da	2016-05-31 12:08:47.775000000 -0400
    @@ -1 +1,4 @@
    +helloworld
    +my name is abc.
    +nice to meet you
    - change mode from '' to '0644'
    - change owner from '' to 'root'
    - change group from '' to 'root'

Running handlers:
Running handlers complete
Chef Client finished, 1/1 resources updated in 02 seconds
[root@chefclient ~]# ls -ltr /etc/motd
-rw-r--r-- 1 root root 44 May 31 12:08 /etc/motd
[root@chefclient ~]# cat /etc/motd
helloworld
my name is abc.
nice to meet you
[root@chefclient ~]# 

完工!



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