Letsencrypt 自动续订不起作用

Question

我certbot renew在我的域名上运行了，但到期日期尚未更新。我该如何判断我做错了什么？

具体步骤：

$ sudo certbot renew --force-renewal
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Processing
/etc/letsencrypt/renewal/eu-central-1.workbook.[domain].conf
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Renewing an existing certificate for us-east-1.workbook.[domain] and 4 more domains
Reloading nginx server after certificate renewal

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Processing /etc/letsencrypt/renewal/us-east-1.workbook.[domain].conf
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Renewing an existing certificate for us-east-1.workbook.[domain]
Reloading nginx server after certificate renewal

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Congratulations, all renewals succeeded: 
  /etc/letsencrypt/live/eu-central-1.workbook.[domain]/fullchain.pem (success)
  /etc/letsencrypt/live/us-east-1.workbook.[domain]/fullchain.pem (success)
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