python监控nginx端口和进程状态

#!/usr/local/bin/python
# coding:utf-8
import psutil
import sys
import os
 
# 获取主机名称
def hostname():
  sys = os.name
  if sys == 'nt':
    hostname = os.getenv('computername')
    return hostname
  elif sys == 'posix':
    host = os.popen('echo $HOSTNAME')
    try:
      hostname = host.read()
      return hostname
    finally:
      host.close()
  else:
    return 'Unkwon hostname'
 
# 获取进程状态
def processStatus(processName):
  pids = psutil.pids()   #获取主机所有的PID
  a = 1
  for pid in pids:      #对所有PID进行循环
    p = psutil.Process(pid)  #实例化进程对象
    if p.name() == processName:   #判断实例进程名与输入的进程名是否一致（判断进程是否存活）
      print (a)   #返回1，进程存活
      a += 1
  if a == 1:
    print (0)         #返回0，进程逝去
 
# 获取进程PID
def processPID(processName):
  pids = psutil.pids()
  for pid in pids:
    p = psutil.Process(pid)
    if p.name() == processName:
      return pid
      return True # 如果找到该进程则打印它的PID，返回true
  else:
    print('找不到进程'+processName)
    return False # 没有找到该进程，返回false
 
# 获取进程的端口号
def processPort(pid):
    p = psutil.Process(pid)
    data=p.connections()
    data_listen=[x for x in data if 'LISTEN' in x ]
    # pid_port=[]
    # for port in data_listen:
    #   pid_port.append((port.laddr.port))
    # return list(set(pid_port))
    return list(data_listen[0][3])[1]
 
hostname=hostname().strip()
PID=processPID('nginx')
port=processPort(PID)
 
json_data = [
{"name": hostname+'-nginx', "port": port,"host_ip":LOCAL_IP,"PID":PID}
]
 
AutoDiscoveryJson(json_data, object_id='HOST')