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阿里云 DNS 的 certbot 插件,用来解决阿里云 DNS 不能自动为通配符证书续期的问题

License: MIT License

Shell 100.00%
certbot certbot-dns certbot-plugin certbot-dns-authenticator

certbot-dns-aliyun's Introduction

certbot-dns-aliyun

解决阿里云 DNS 不能自动为通配符证书续期的问题

原理

当我们使用 certbot 申请通配符证书时,需要手动添加 TXT 记录。每个 certbot 申请的证书有效期为 3 个月,虽然 certbot 提供了自动续期命令,但是当我们把自动续期命令配置为定时任务时,我们无法手动添加新的 TXT 记录用于 certbot 验证。

好在 certbot 提供了一个 hook,可以编写一个 Shell 脚本。在续期的时候让脚本调用 DNS 服务商的 API 接口动态添加 TXT 记录,验证完成后再删除此记录。

安装

  1. 安装 aliyun cli 工具

    wget https://aliyuncli.alicdn.com/aliyun-cli-linux-latest-amd64.tgz
    tar xzvf aliyun-cli-linux-latest-amd64.tgz
    sudo cp aliyun /usr/local/bin
    rm aliyun

    安装完成后需要配置凭证信息

  2. 安装 certbot-dns-aliyun 插件

    wget https://cdn.jsdelivr.net/gh/justjavac/certbot-dns-aliyun@main/alidns.sh
    sudo cp alidns.sh /usr/local/bin
    sudo chmod +x /usr/local/bin/alidns.sh
    sudo ln -s /usr/local/bin/alidns.sh /usr/local/bin/alidns
    rm alidns.sh
  3. 申请证书

    测试是否能正确申请:

    certbot certonly -d *.example.com --manual --preferred-challenges dns --manual-auth-hook "alidns" --manual-cleanup-hook "alidns clean" --dry-run

    正式申请时去掉 --dry-run 参数:

    certbot certonly -d *.example.com --manual --preferred-challenges dns --manual-auth-hook "alidns" --manual-cleanup-hook "alidns clean"
  4. 证书续期

    certbot renew --manual --preferred-challenges dns --manual-auth-hook "alidns" --manual-cleanup-hook "alidns clean" --dry-run

    如果以上命令没有错误,把 --dry-run 参数去掉。

  5. 自动续期

    添加定时任务 crontab。

    crontab -e

    输入

    1 1 */1 * * root certbot renew --manual --preferred-challenges dns --manual-auth-hook "alidns" --manual-cleanup-hook "alidns clean" --deploy-hook "nginx -s reload"

    上面脚本中的 --deploy-hook "nginx -s reload" 表示在续期成功后自动重启 nginx。

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