ssl证书自动更新脚本

SSL证书自动更新脚本是一种能够自动更新网站的SSL证书的脚本工具，它能够自动监测SSL证书的有效期并在证书过期前自动更新证书，从而确保网站的安全性和可靠性。

实现SSL证书自动更新需要使用到多种技术，包括Python语言、Linux操作系统、bash脚本以及SSL证书管理工具certbot等。

以下是一个Python编写的自动更新脚本示例：

#!/usr/bin/env python

import subprocess
import os
import sys
import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

# Set up logging to the console
console_handler = logging.StreamHandler()
console_handler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
console_handler.setFormatter(formatter)
logger.addHandler(console_handler)

SERVER_NAME = 'example.com'
ACCOUNT_EMAIL = 'user@example.com'

def renew_ssl_certificate():
    logger.info('Renewing SSL certificate for %s', SERVER_NAME)

    # Run certbot command to renew certificate
    command = ['certbot', 'renew', '--noninteractive', '--agree-tos', '--no-self-upgrade', '--email', ACCOUNT_EMAIL, '-d', SERVER_NAME]
    try:
        output = subprocess.check_output(command, stderr=subprocess.STDOUT)
        logger.debug('Output from certbot: %s', output)
    except subprocess.CalledProcessError as e:
        logger.error('Error running certbot: %s', e.output)
        sys.exit(1)

    # Reload server configuration to use new certificate
    reload_server_config()

def reload_server_config():
    logger.info('Reloading server configuration')

    # Check which server software is running
    if os.path.isfile('/etc/init.d/apache2'):
        command = ['sudo', '/etc/init.d/apache2', 'reload']
    elif os.path.isfile('/etc/init.d/nginx'):
        command = ['sudo', '/etc/init.d/nginx', 'reload']
    elif os.path.isfile('/etc/init.d/httpd'):
        command = ['sudo', '/etc/init.d/httpd', 'reload']
    else:
        logger.error('Could not find a supported server software')
        sys.exit(1)

    try:
        output = subprocess.check_output(command, stderr=subprocess.STDOUT)
        logger.debug('Output from server reload: %s', output)
    except subprocess.CalledProcessError as e:
        logger.error('Error reloading server configuration: %s', e.output)
        sys.exit(1)

if __name__ == '__main__':
    renew_ssl_certificate()

该脚本使用certbot工具来自动更新