One 、Playbook The function of

playbook By one or more play A list of components
Playboot Files use YAML To write it

Two 、YAML

 brief introduction 
 Is a format for expressing data sequences , similar XML
Yet Another Markup Language
2001 First published in 
www.yaml.org

 characteristic 
 Good readability 
 Good interaction with script language 
 Easy to implement 
 Applicable program execution flow sorting method 
 High scalability 

Syntactic introduction
Use in file [- - -] Start
Use in file [. . .] ending
The next line generally writes the contents of the document
Indent strictly
Case sensitive
key/value You can write in multiple lines or one line , A line of calligraphy is written in , separate
value It could be a string , But list
One play Need to include name and tasks
name Is to describe
tasks It's action
One name Only one can be included task
Extension name yml perhaps yaml

YAML Two representations of lists

[Linux,C++,Java,Python]
- Linux
- C++
- Java
- Python

YAML Dictionary

 The dictionary is used to store key values 
name:westos
age:12
jobs:linux

{
    name: "westos", age: "12", jobs: "linux"}

3、 ... and 、playbook Carry out orders

ansible-playbook xxx.yml  Execute command format 
--check|-C			 testing 
--syntax-check		check language
--list-hosts		 List hosts
--list-tags			 List tag
--list-tasks		 List task
--limit				 Specify the execution host 
-v -vv				 Realistic process 

Playbook Core components 
name		 Optional , It is recommended to use more to illustrate 
hosts		 List of controlled hosts 
tasks		 Mission 
			 Use and select to execute part of the code 

 experiment ：
 requirement ：
 Complete the following user operations in the system 
1. Set up user groups Manufacture,Finance,Technology And meet the following requirements ：
* Manufacture Group id by 8000
* Finance Group id by 8001
* Technology Group id by 8002

2. establish westosuser,linux,lee,westosadmin Wait for the user to complete the following requirements 
*westosuser The user's additional group is Manufacture and Technology
*lee The main group of is Finance, Additional set for Technology,lee Of uid and gid It has to be consistent 
*linux The system account cannot be used by the operator 

3. Create a directory to complete the following requirements 
* new directory /WESTOS_Manufacture,/WESTOS_Finance,/WESTOS_Technology,/WESTOS_Public
*/WESTOS_Manufacture Directory is Manufacture Data storage directory in , Can only be Manufacture Read and write by personnel in the , And in /WESTOS_Manufacture All files created in belong to Manufacture Inside 
*/WESTOS_Finance Directory is Finance Data storage directory in , Can only be Finance Read and write by personnel in the , And in /WESTOS_Finance All files created in belong to Finance Inside 
*/WESTOS_Technology Directory is Technology Data storage directory in , Can only be Technology Read and write by personnel in the , And in /WESTOS_Technology All files created in belong to Technology Inside 
*/WESTOS_Public Public directory for company personnel , It can be read and written by any employee of the company , But you can only delete your own files 

Four 、 Setting skills

autocmd FileType yaml setlocal ai ts=2 sw=2 et
setlocal	 Set current file 
ai			 Auto backspace alignment ,auto indent
ts			tab The construction length is 2 Space  tabstop=2
sw			 The indent length is 2,shiftwidth=2
et			 hold tab Key into space  expandtab

 experiment ：
 requirement ：install vsftpd
 And anonymous users can log in anon can login