为了提高对搜索引擎SEO的友好性，网站开启了https。但是最近访问个人网站时发现浏览器提示不安全，原因是 https证书失效了，但是当初使用的 certbot 本应该自动更新 https 证书的。于是查找原因，先尝试手动更新证书。执行命令：
# certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log
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Processing /etc/letsencrypt/renewal/codebye.com.conf
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Cert is due for renewal, auto-renewing…
Plugins selected: Authenticator nginx, Installer nginx
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Renewing an existing certificate
Performing the following challenges:
http-01 challenge for codebye.com
Cleaning up challenges
Attempting to renew cert (codebye.com) from /etc/letsencrypt/renewal/codebye.com.conf produced an unexpected error: ‘ascii’ codec can’t decode byte 0xe5 in position 2: ordinal not in range(128). Skipping.
All renewal attempts failed. The following certs could not be renewed:
/etc/letsencrypt/live/codebye.com/fullchain.pem (failure)
1 renew failure(s), 0 parse failure(s)
调查发现错误原因： nginx 配置文件中包含中文注释，去掉中文字符即可。估计下次到期应该会自动更新网站的https证书了，等过期时间再观察一下。
CodeBye 版权所有丨如未注明 , 均为原创丨本网站采用BY-NC-SA协议进行授权 , 转载请注明certbot 自动更新网站https证书失败 ‘ascii’ codec can’t decode byte 0xe5 in position！
