下文并没有根本上解决端口绑定的问题，只是换了一种获取/更新证书的方式，绕过了端口绑定
环境
- LNMP
- certbot
- Ubuntu 16.04
问题描述
certbot 更新证书，执行
certbot renew --dry-run
后，报错
Encountered exception during recovery: certbot.errors.MisconfigurationError: nginx restart failed:
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
…
nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
nginx: [emerg] still could not bind()
Attempting to renew cert (xxx.com) from /etc/letsencrypt/renewal/xxx.com.conf produced an unexpected error: nginx restart failed:
参考
参考太多了，不整理了
