Python# 监控进程，并且发送邮件通知

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"""
判断一个进程是否存活，如果进程挂掉就会重启某个进程，并且发送邮件通知。邮件使用HTML
"""
from __future__ import print_function
from collections import OrderedDict
import os, sys, time
import smtplib
from email.mime.text import MIMEText
from email.header import Header


#负载信息
def load_stat():
    loadavg = {}
    f = open("/proc/loadavg")
    con = f.read().split()
    f.close()
    loadavg['lavg_1'] = con[0]
    loadavg['lavg_5'] = con[1]
    loadavg['lavg_15'] = con[2]
    loadavg['nr'] = con[3]
    loadavg['last_pid'] = con[4]
    return loadavg

#内存信息
def meminfo():
    ''' Return the information in /proc/meminfo
    as a dictionary '''
    meminfo = OrderedDict()

    with open('/proc/meminfo') as f:
        for line in f:
            meminfo[line.split(':')[0]] = line.split(':')[1].strip()
    return meminfo


#    meminfo = meminfo()
#    print('Total memory: {0}'.format(meminfo['MemTotal']))
#    print('Free memory: {0}'.format(meminfo['MemFree']))

def nojsmail(x, y):
    # 第三方 SMTP 服务
    mail_host = "smtp.exmail.qq.com"  # 设置服务器这个是qq
    mail_user = "linwen@xxxxx.com"  # 用户名
    mail_pass = "xxxxx"  # 口令

    sender = 'linwen@xxxxx.com'
    receivers = ['linwen@xxxxx.com']
    # mail_msg=str(timestamp) + ':' + 'Nodejs断开重启了
' + str(sys.exc_info()[1])
    mail_msg = """
    <p>NodeJS 进程异常退出，4 秒后重新启动...</p>
    <p>--------------------------------------</p>
    """ + 'Total memory: ' + str(meminfo['MemTotal']) + '<br > ' + 'Free memory: ' + str(
        meminfo['MemFree']) + '<br >' + "loadavg :" + str(load_stat()['lavg_15'])

    message = MIMEText(mail_msg, 'html', 'utf-8')
    message['From'] = Header("linwensheng", 'utf-8')
    message['To'] = Header("linwensheng", 'utf-8')

    subject = 'Python 监控NodeJs邮件测试'
    message['Subject'] = Header(subject, 'utf-8')

    try:
        smtpObj = smtplib.SMTP()
        smtpObj.connect(mail_host, 25)  # 25 为 SMTP 端口号
        smtpObj.login(mail_user, mail_pass)
        smtpObj.sendmail(sender, receivers, message.as_string())
        print("邮件发送成功")

    except smtplib.SMTPException:
        print("Error: 无法发送邮件")


if __name__ == "__main__":
    ret = os.popen('ps -C mysqld -o pid,cmd').readlines()
    if len(ret) < 3:
        print('NodeJS 进程异常退出，4 秒后重新启动')
        time.sleep(3)
        os.system("service mysqld restart >/dev/null 2>&1")
        timestamp = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())
        meminfo = meminfo()
        nojsmail(meminfo, load_stat)

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