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ansible-inventory-scripts

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ansible通过脚本获取inventory

很多场景下需要通过脚本按需（动态）获取inventory

  • 脚本必须实现--list和--host <hostname>两个参数
  • 可执行权限
  • 结果以标准输出输出（返回）

--list: 返回所有的主机组信息

--host : 返回指定主机的变量信息（或空字典）

简单示例

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---
#!/usr/bin/python
# encoding=utf-8

import sys
import json

'''
{
    "_meta": {
        "hostvars": {
            "127.0.0.1": {
                "var1": "value1"
            }
        }
    },
    "all": {
        "children": [
            "dev"
        ]
    },
    "dev": {
        "hosts": [
            "127.0.0.1"
        ]
    }
}
'''

data = {"_meta":{"hostvars":{"127.0.0.1":{"var1":"value1"}}},
        "all":{"children":["dev"]},
        "dev":{"hosts":["127.0.0.1"]}}

if len(sys.argv) == 2 and (sys.argv[1] == '--list'):
    print(json.dumps(data))

elif len(sys.argv) == 3 and (sys.argv[1] == '--host'):
    print(json.dumps(data["_meta"]["hostvars"][sys.argv[2]]))

测试

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root@VM-0-11-ubuntu ~ #ansible-inventory -i inventory_scripts.py --graph
@all:
  |--@dev:
  |  |--127.0.0.1
  |--@ungrouped:

ad-hoc

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root@VM-0-11-ubuntu ~ #ansible -i inventory_scripts.py dev -m raw -a 'whoami'
127.0.0.1 | CHANGED | rc=0 >>
root
Shared connection to 127.0.0.1 closed.

playbook

raw-book.yml

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- hosts: dev
  remote_user: root

  tasks:
    - name: ping test
      raw: whoami
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root@VM-0-11-ubuntu ~ #ansible-playbook -i inventory_scripts.py raw-book.yml