腾讯云 `API` 服务 `Let's Encrypt` 证书 `Renew` 失败

一年多了之前 Renew 都是正常的，就在双十一当天 Renew 一直失败，各位 V 友有遇到这种情况吗？有思路的给个提示，下面是部分信息。

1. 子域 api.xxxx.xx，域名在阿里云管理，DNS 配的 A 记录
2. 使用的 standalone 模式， Renew 前已经把本地的 Nginx 关闭了。80、443 端口没被占用
3. 把服务器重启后 Renew 也是一样的错
4. 网上也看到一些类似情况，但也解决不了

部分错误日志如下：

{
  "identifier": {
    "type": "dns",
    "value": "api.xxxx.xx"
  },
  "status": "invalid",
  "expires": "2018-11-18T15:33:56Z",
  "challenges": [
    {
      "type": "http-01",
      "status": "invalid",
      "error": {
        "type": "urn:ietf:params:acme:error:connection",
        "detail": "Fetching http://api.xxxx.xx/.well-known/acme-challenge/xxxxxxxx: Error getting validation data",
        "status": 400
      },
      "url": "https://acme-v02.api.letsencrypt.org/acme/challenge/jgMy9WxHILHaUScF9joUpdXZ7uCRDSM2mabGDDn_22k/9189513629",
      "token": "xxxxxxxx",
      "validationRecord": [
        {
          "url": "http://api.xxxx.xx/.well-known/acme-challenge/xxxxxxxx",
          "hostname": "api.xxxx.xx",
          "port": "80",
          "addressesResolved": [
            "xx.xxx.xx.xx"
          ],
          "addressUsed": "xx.xxx.xx.xx"
        }
      ]
    }
  ]
}
2018-11-11 23:35:02,624:DEBUG:certbot.reporter:Reporting to user: The following errors were reported by the server:

Attempting to renew cert (api.xxxx.xx) from /etc/letsencrypt/renewal/api.xxxx.xx.conf produced an unexpected error: Failed authorization procedure. api.xxxx.xx ( http-01): urn:ietf:params:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http://api.xxxx.xx/.well-known/acme-challenge/k9NoezsP97OBAnv0hP_a6jbV_9OKhFey5QOqt9ON2nk: Error getting validation data. Skipping.
All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/api.xxxx.xx/fullchain.pem (failure)