ansible通过inventory动态分组
1、说明
ansible既支持独立手动配置host文件来分组管理；也可以通过inventory结合python脚本通过指定hosts文件来动态分组；
以下我们通过线上某项目inventory自动将/etc/hosts中的服务器解析文件，动态生成对应项目组；好处是在/etc/hosts中一个地方配置解析就可以满足ansible和shell管理主机；
2、/etc/hosts文件
cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
127.0.0.1 localhost4.localdomain4 localhost4
## OBT Server
10.186.186.2 hk-xgame-obt-center01
10.186.186.4 hk-xgame-obt-center02
10.186.186.10 hk-xgame-obt-fight01
10.186.186.7 hk-xgame-obt-fight02
10.186.186.36 hk-xgame-obt-zkongfun
10.186.186.22 hk-xgame-obt-zkongid zkonggift
10.186.186.44 hk-xgame-obt-zkongplay zkongpush
10.186.186.24 hk-xgame-obt-pingbi01
10.186.186.45 hk-xgame-obt-pingbi02
10.186.186.87 hk-xgame-obt-game01
10.186.186.94 hk-xgame-obt-game02
10.186.186.123 hk-xgame-obt-game03
# pre
10.186.186.38 hk-xgame-pre-game01
10.186.188.7 hk-xgame-pre-zkong01 hk-xgame-cqc-game01
# test
10.186.188.7 hk-xgame-test01
3、ansible.cfg配置
egrep -v '^$|^#' ansible.cfg
[defaults]
inventory = /etc/ansible/dynamic_hosts.py
forks = 50
gathering = explicit
host_key_checking = False
deprecation_warnings = False
log_path = /var/log/ansible.log
command_warnings = False
[inventory]
[privilege_escalation]
[paramiko_connection]
[ssh_connection]
ssh_args = -C -o ControlMaster=auto -o ControlPersist=3d
control_path_dir = ~/.ansible/cp
control_path = %(directory)s/%%h-%%r
pipelining = True
[persistent_connection]
[accelerate]
[selinux]
[colors]
[diff]
4、dynamic_hosts.py自动分组
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# 基于python的动态inventory脚本实例
# 2022-05-12 by san
import argparse
import re
try:
import json
except ImportError:
import simplejson as json
class DynamicInventory(object):
def __init__(self):
self.inventory = {}
self.read_cli_args()
#根据选项参数返回json
if self.args.list:
self.inventory = self.ret_inventory()
elif self.args.host:
self.inventory = self.ret_inventory()
else:
self.inventory = self.empty_inventory()
print json.dumps(self.inventory)
def read_cli_args(self):
# 定义选项参数
parser = argparse.ArgumentParser()
parser.add_argument('--list',dest='list',action = 'store_true')
parser.add_argument('--host',dest='host',action = 'store')
self.args = parser.parse_args()
def ret_inventory(self):
SUM = []
host_group = ['pre','obt','pre-game','pre-zkong','obt-game','obt-center','obt-zkong','obt-fight','obt-pingbi']
hostdict = {}
for group in host_group:
#re_string = "hk-sanguo-%s\w+" % group
re_string = "hk-sanguo-%s\S+" % group
with open('/etc/hosts', 'r') as f:
li = re.findall(re_string, f.read())
# remove special mathine
#if 'cn-sd2-cb2p-gm' in li:
# li.remove('cn-sd2-cb2p-gm')
hostdict[group] = {'hosts': li}
return hostdict
def empty_inventory(self):
return {'_meta':{'hostvars':{}}}
if __name__ == '__main__':
DynamicInventory()
#h = DynamicInventory()
#print h.ret_inventory()
5、测试
./dynamic_hosts.py --list
{"pre": {"hosts": ["hk-xgame-pre-game01", "hk-xgame-pre-zkong01"]}, "obt-center": {"hosts": ["hk-xgame-obt-center01", "hk-xgame-obt-center02"]}, "obt-game": {"hosts": ["hk-xgame-obt-game01", "hk-xgame-obt-game02", "hk-xgame-obt-game03"]}, "pre-game": {"hosts": ["hk-xgame-pre-game01"]}, "obt-fight": {"hosts": ["hk-xgame-obt-fight01", "hk-xgame-obt-fight02"]}, "pre-zkong": {"hosts": ["hk-xgame-pre-zkong01"]}, "obt": {"hosts": ["hk-xgame-obt-center01", "hk-xgame-obt-center02", "hk-xgame-obt-fight01", "hk-xgame-obt-fight02", "hk-xgame-obt-zkongfun", "hk-xgame-obt-zkongid", "hk-xgame-obt-zkongplay", "hk-xgame-obt-pingbi01", "hk-xgame-obt-pingbi02", "hk-xgame-obt-game01", "hk-xgame-obt-game02", "hk-xgame-obt-game03"]}, "obt-pingbi": {"hosts": ["hk-xgame-obt-pingbi01", "hk-xgame-obt-pingbi02"]}, "obt-zkong": {"hosts": ["hk-xgame-obt-zkongfun", "hk-xgame-obt-zkongid", "hk-xgame-obt-zkongplay"]}}
ansible pre -m ping
/usr/lib/python2.7/site-packages/ansible/parsing/vault/__init__.py:44: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.
from cryptography.exceptions import InvalidSignature
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
hk-xgame-pre-game01 | SUCCESS => {
"ansible_facts": {
"discovered_interpreter_python": "/usr/bin/python"
},
"changed": false,
"ping": "pong"
}
hk-xgame-pre-zkong01 | SUCCESS => {
"ansible_facts": {
"discovered_interpreter_python": "/usr/bin/python"
},
"changed": false,
"ping": "pong"
}
文档信息
- 本文作者：sysnat
- 本文链接：https://sysant.github.io/2024/08/28/ansible-inventory/
- 版权声明：自由转载-非商用-非衍生-保持署名（创意共享3.0许可证）