python批量检查通一个集群针对同一个域名解析到不同IP地址证书的有效性

有时候我们批量更新域名的证书后需要检查这些证书是否已经生效，避免因过期引发问题


# cat check_domain_ssl.py

# coding: utf-8 
# 查询域名证书到期情况
 
import re
import time
import subprocess
from datetime import datetime
from io import StringIO


def main(domain):
  # curl --head --resolve store.chinasoft.co.jp:443:${ip} "https://store.chinasoft.co.jp/"
  #comm = f"curl -Ivs https://{domain} --connect-timeout 10"
  store_servers=["1.1.1.1", "1.1.1.2"]
  for store_ip in store_servers:
    f = StringIO()
    print(store_ip)
    comm = f"curl -Ivs --resolve {domain}:443:{store_ip} https://{domain} --connect-timeout 10"
    #print(comm)

    result = subprocess.getstatusoutput(comm)
    f.write(result[1])

    m = re.search('start date: (.*?)\n.*?expire date: (.*?)\n.*?common name: (.*?)\n.*?issuer: CN=(.*?)\n', f.getvalue(), re.S)
    start_date = m.group(1)
    expire_date = m.group(2)
    common_name = m.group(3)
    issuer = m.group(4)

    # time 字符串转时间数组
    start_date = time.strptime(start_date, "%b %d %H:%M:%S %Y GMT")
    start_date_st = time.strftime("%Y-%m-%d %H:%M:%S", start_date)
    # datetime 字符串转时间数组
    expire_date = datetime.strptime(expire_date, "%b %d %H:%M:%S %Y GMT")
    expire_date_st = datetime.strftime(expire_date,"%Y-%m-%d %H:%M:%S")

    # 剩余天数
    remaining = (expire_date-datetime.now()).days

    print ('域名:', domain)
    print ('通用名:', common_name)
    print ('开始时间:', start_date_st)
    print ('到期时间:', expire_date_st)
    print (f'剩余时间: {remaining}天')
    print ('颁发机构:', issuer)
    print ('*'*30)

    time.sleep(1)
    f.flush()
    f.close()


if __name__ == "__main__":
  domains = ['cbs.chinasoft.com'] 
  for domain in domains:
    main(domain)


# 运行结果
******************************
1.1.1.1
域名: cart.chinasoft.com
通用名: *.chinasoft.com
开始时间: 2020-06-12 00:00:00
到期时间: 2022-06-13 12:00:00
剩余时间: 728天
颁发机构: RapidSSL RSA CA 2018,OU=www.digicert.com,O=DigiCert Inc,C=US
******************************
1.1.1.2
域名: cart.chinasoft.com
通用名: *.chinasoft.com
开始时间: 2020-06-12 00:00:00
到期时间: 2022-06-13 12:00:00
剩余时间: 728天
颁发机构: RapidSSL RSA CA 2018,OU=www.digicert.com,O=DigiCert Inc,C=US
******************************