如 动态Inventory所介绍,ansibel可以从一个动态的数据源获取到inventory信息,包含元端数据源。

如 动态Inventory所介绍,ansibel可以从一个动态的数据源获取到inventory信息,包含元端数据源。

怎么写一个自己的数据源？


很简单！ 我们仅仅需要创建一个在适当参数下,能够返回正确JSON格式数据的脚本或者程序,你可以使用任何语言来实现。

脚本规范:

当我们在外部使用-list 蚕食调用这个脚本时,
[root@node01 ~]# python  /etc/ansible/inventory.py  -list
{"all": ["192.168.137.3"]}

这个脚本必须返回一个JSON散列/字典,它包含所管理的所有组,每个组的value应该是一个关于其包含的主机/IP哈希/字典,

它可能是一个子组或者租的变量 或者仅仅是一个主机/IP的列表:
[root@node01 ansible]# cat p2.py 
# !/usr/bin/env python
# -*- coding: utf-8 -*-
import cx_Oracle
from pprint import pprint
import csv
import time
import re
import binascii
import json
a={
    "databases"   : {
        "hosts"   : [ "host1.example.com", "host2.example.com" ],
        "vars"    : {
            "a"   : 'true'
        }
    },
    "webservers"  : [ "host2.example.com", "host3.example.com" ],
    "atlanta"     : {
        "hosts"   : [ "host1.example.com", "host4.example.com", "host5.example.com" ],
        "vars"    : {
            "b"   : 'false'
        },
        "children": [ "marietta", "5points" ]
    },
    "marietta"    : [ "host6.example.com" ],
    "5points"     : [ "host7.example.com" ]
}

b=json.dumps(a)
print b
[root@node01 ansible]# python  /etc/ansible/p2.py  -list
{"webservers": ["host2.example.com", "host3.example.com"],
 "atlanta": {"hosts": ["host1.example.com", "host4.example.com", "host5.example.com"], 
"children": ["marietta", "5points"], "vars": {"b": "false"}},
 "marietta": ["host6.example.com"], "5points": ["host7.example.com"],
 "databases": {"hosts": ["host1.example.com", "host2.example.com"],
 "vars": {"a": "true"}}}



[root@node01 ansible]# chmod +x p2.py
[root@node01 ansible]#  ansible -i  /etc/ansible/p2.py webservers  -m raw -a "hostname"
host2.example.com | UNREACHABLE! => {
    "changed": false, 
    "msg": "Failed to connect to the host via ssh: ssh: Could not resolve hostname host2.example.com: Name or service not known
", 
    "unreachable": true
}
host3.example.com | UNREACHABLE! => {
    "changed": false, 
    "msg": "Failed to connect to the host via ssh: ssh: Could not resolve hostname host3.example.com: Name or service not known
", 
    "unreachable": true
}


ansible -i  /etc/ansible/p2.py webservers  -m raw -a "hostname" 调用webservers 组