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:
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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' } |
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#!/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服务器之家网站的支持!
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原文链接:https://blog.csdn.net/u010033674/article/details/104005394