时间:2020-11-02 python教程 查看: 1023
Ansible Inventory 介绍
Ansible Inventory 是包含静态 Inventory 和动态 Inventory 两部分的,静态 Inventory 指的是在文件中指定的主机和组,动态 Inventory 指通过外部脚本获取主机列表,并按照 ansible 所要求的格式返回给 ansilbe 命令的。这部分一般会结合 CMDB 资管系统、云计算平台等获取主机信息。由于主机资源一般会动态的进行增减,而这些系统一般会智能更新。我们可以通过这些工具提供的 API 或者接入库查询等方式返回主机列表。
脚本地址:https://github.com/AlbertCQY/scripts/tree/master/ansible
脚本用法:README.txt
1、脚本用法
bestpay用户 cd /tools/scripts/ansible
python3.6 invscript.py -h
1)、查询某个分组中包含哪些主机,oracle_nj_all为inventory_group.py中的组名
python3.6 invscript.py --group oracle_nj_all
2)、查询所有
python3.6 invscript.py --list
3)、查询某分组主机中主机名,脚本也可以在play-book中使用-i指定inventory
ansible -i invscript.py mysql_nj_all -m shell -a “hostname”
2、更新数据库主机列表,sql中最好对ip进行去除空格并排序,否则可能会有warning
inventory_group.py中格式:
mygrp2就是ansible使用的组名
‘ssh_user':‘root' root用户代表连到目标主机的用户。如果ansible server主机的test用户和目标的root用户有互信,那么ansible脚本在test用户下执行。
例子如下:
mygrp2 = {‘sql':"""
select ‘1.1.3.8' as ips
union all
select ‘1.1.3.112' as ips
union all
select ‘1.1.3.113' as ips
“”",
‘ssh_user':‘root'}
部分脚本内容:
#!/usr/bin/env python
#-*- coding: UTF-8 -*-
# =========================================================================
"""
-- File Name : invscript.py
-- Purpose : 从mysql数据中动态获取主机列表,动态inventory,不用维护主机列表
-- Date : 2020/01
-- Author:陈晴阳
Vervisons:
-- 20200106 1.0,陈晴阳,实现了动态获取主机列表,按照默认互信方式获取主机信息。
-- 20200116 2.0,陈晴阳,增加--group参数,并统计各个分组主机个数;重构了group_all 所有主机按照各组设置的互信用户来抓信息;增加对IP地址排序功能。
"""
# =========================================================================
import argparse
import sys
import json
import settings
import inventory_group as invgrp
from connect_mysql import Mysql_Conn
class DynamicInventory(object):
def read_cli(self):
parser = argparse.ArgumentParser()
parser.add_argument('--host', nargs=1)
parser.add_argument('--list', action='store_true')
parser.add_argument('--group')
self.options = parser.parse_args()
def GetItemList(self):
list_item = []
for item in dir(invgrp):
if not item.startswith("__"):
list_item.append(item)
return list_item
def GetGrpList(self):
list_grpinfo = []
list_item = self.GetItemList()
for item in list_item:
itemcontent = getattr(invgrp, item)
tmp_dic = {}
tmp_dic[item] = itemcontent
list_grpinfo.append(tmp_dic)
return list_grpinfo
def get_groups(self):
hostgroups = self.GetGrpList()
#allhost = []
for hostdic in hostgroups:#hostgroup为字典
for hostgroup in hostdic: #获取字典的key
self.result[hostgroup] = {}
v_sql = hostdic[hostgroup]['sql'] #获取sql
v_ssh_user = hostdic[hostgroup]['ssh_user'] # 获取sql
hosts = self.connection.execsql(v_sql)
#print(hosts)
# 构建每个分组
grp_host_list = [host[0] for host in hosts]
grp_host_list = sorted(grp_host_list, key=lambda x: (int(x.split('.')[0]), int(x.split('.')[1]), int(x.split('.')[2]))) #排序
self.result[hostgroup]['hosts'] = grp_host_list
self.result[hostgroup]['vars'] = {'ansible_ssh_user': v_ssh_user}
#构建_meta,注意ip为元组,需要做个小转换ip[0] 需要字符串值
for ip in hosts:
tmp_dic = {}
tmp_dic['ansible_ssh_host'] = ip[0]
self.result['_meta']['hostvars'][ip[0]] = tmp_dic
# 构建group_all
self.result[self.defaultgroup]['hosts']=[]
self.result[self.defaultgroup]['children'] =self.GetItemList()
return self.result
def get_host(self,ipaddr):
ip = ''
for i in ipaddr:
ip = i
data = {'ansible_ssh_host': ip}
return data
def get_group_hosts(self,grpname):
if grpname == 'group_all':
allhosts = []
#查询出来所有的主机列表
hostgroups = self.GetGrpList()
for hostdic in hostgroups: # hostgroup为字典
for hostgroup in hostdic: # 获取字典的key
v_sql = hostdic[hostgroup]['sql'] # 获取sql
hosts = self.connection.execsql(v_sql)
allhosts.extend([host[0] for host in hosts])
allhosts = set(allhosts) # 去重
allhosts = sorted(allhosts, key=lambda x: (int(x.split('.')[0]), int(x.split('.')[1]), int(x.split('.')[2]))) #排序
cnt = 0
for i in allhosts:
print(cnt + 1, i)
cnt = cnt + 1
print('Group ' + grpname + ' Total hosts:', cnt)
else:
txt_grp ='invgrp.'+grpname+"""['sql']"""
v_sql = eval(txt_grp) #这里偷懒用了邪恶函数eval
hosts = self.connection.execsql(v_sql)
cnt = 0
for i in hosts:
print(cnt + 1,i[0])
cnt = cnt + 1
print('Group '+grpname+' Total hosts:',cnt)
def __init__(self):
try:
self.connection = Mysql_Conn(settings.my_usr, settings.my_pass, settings.my_ip, settings.my_port, settings.my_db)
except Exception as err:
print("connect wrong", err)
self.defaultgroup = 'group_all'
self.options = None
self.read_cli()
self.result = {}
self.result[self.defaultgroup] = {}
self.result[self.defaultgroup]['hosts'] = []
self.result[self.defaultgroup]['vars'] = {'ansible_ssh_user': 'bestpay'}
self.result['_meta'] = {}
self.result['_meta']['hostvars'] = {}
if self.options.host:
data = self.get_host(self.options.host)
print(json.dumps(data,indent=4))
elif self.options.list:
data = self.get_groups()
print(json.dumps(data,indent=4))
elif self.options.group:
data = self.get_group_hosts(self.options.group)
else:
sys.exit("usage: --list or --host HOSTNAME or --group GROUPNAME")
if __name__ == '__main__':
DynamicInventory()
总结
以上所述是小编给大家介绍的python3连接mysql获取ansible动态inventory脚本,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对python博客网站的支持!
如果你觉得本文对你有帮助,欢迎转载,烦请注明出处,谢谢!