每日一题_Python.纯Python实现Low-Level discovery动态服务发现?
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具体需求:
1. 由于自主开发的XmZoomEye-Agent目前被动监控为主,为了实现Zabbix Low-Level Discovery服务自主发现,需要根据进程名自动获取占用端口列表,并根据端口分析上报数据
实现思路:
1. 利用psutil模块通过进程名获取进程id列表
2. 遍历/proc/net/tcp文件获取rem_address为00000000:0000的列,将第九列的socket_id和它以集合形式的字典存储去重
3. 利用获取到的pid列表和socket_id集合字典生成端口集合
4. 尝试连接端口获取动态数据上报
具体代码:
#!/usr/bin/env python # -*- coding: utf-8 -*- """ # # Authors: limanman # OsChina: http://xmdevops.blog.51cto.com/ # Purpose: # """ # 说明: 导入公共模块 import os import re import psutil # 说明: 导入其它模块 # 说明: 获取进程 def pidof_processname(srvname): pids = [] for pid in psutil.process_iter(): if pid.name() == srvname: pids.append(str(pid.pid)) return pids # 说明: 套接端口 def socks_with_ports(): sockets = {} with open(‘/proc/net/tcp‘, ‘r+b‘) as fd: for curline in fd: sepline = curline.split() if sepline[2] != ‘00000000:0000‘: continue key = sepline[9] addr, port = sepline[1].split(‘:‘) if key not in sockets: sockets[key] = set() sockets[key].add(int(port, 16)) return sockets # 说明: 获取端口 def analysis_sockports(pids, socks): sock_ports = set() for pid in pids: fd_path = os.path.join(os.path.join(‘/proc‘, pid), ‘fd‘) for rlink in os.listdir(fd_path): rpath = os.path.join(fd_path, rlink) if not os.path.exists(rpath): continue vlink = os.readlink(rpath) if not vlink.startswith(‘socket:‘): continue match = re.search(r‘(?<=socket:\[)([0-9]+)(?=\])‘, vlink) if not match: continue addr = match.group(1) if addr in socks: sock_ports.update(socks[addr]) return sock_ports def service_redis_running_status(add_data=None): srv_name = ‘redis-server‘ pids = pidof_processname(srv_name) socks = socks_with_ports() ports = analysis_sockports(pids, socks) return ‘service: %s -> port: ‘ % srv_name, ports if __name__ == ‘__main__‘: import pprint pprint.pprint(service_redis_running_status())
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