直接上代码:

# python3# -*- coding: utf-8 -*-# 2017/06/16 by luohanfrom email.mime.text import MIMETextfrom email.header import Headerfrom email.utils import parseaddr, formataddrimport smtplibimport timeimport osdef get_size(start_path = '.'):    total_size = 0    for dirpath, dirnames, filenames in os.walk(start_path):        for f in filenames:            fp = os.path.join(dirpath, f)            total_size += os.path.getsize(fp)    return total_size / (1024 * 1024 * 1024)def _format_addr(s):    name, addr = parseaddr(s)    return formataddr((Header(name, 'utf-8').encode(), addr))def send_mail():    from_addr = '**@**.com'    passwd = '***'    to_addrs = ['123@qq.com', '234@qq.com']    msg = MIMEText('统计服务器/dev/shm内存报警', 'plain', 'utf-8')    msg['From'] = from_addr    msg['To'] = ','.join(to_addrs)    msg['Subject'] = Header('线上服务器报警', 'utf-8').encode()    try:        smtp_server = 'smtp.exmail.qq.com'        server = smtplib.SMTP_SSL(smtp_server, 465)        server.login(from_addr, passwd)        server.sendmail(from_addr, to_addrs, msg.as_string())        with open('/home/jobs/mail.log', 'a') as f:            print('{}: send success'.format(time.time()), file=f)    except smtplib.SMTPException as e:        with open('/home/jobs/mailerr.log', 'a') as f:            print('{}: send failed, {}'.format(time.time(), e), file=f)    finally:        server.quit()def check_dir_size(target_dir):    dirsize = get_size(target_dir)    # 超过12G，总大小16G    if dirsize > 12:        send_mail()check_dir_size('/dev/shm')

 

参考资料: