使用Certbot续签HTTPS证书

使用certbot续签证书时，需要使用80端口。如有服务占用80端口，需停止该服务再执行续签操作。

不停止占用80端口的服务进行续签，会出现以下错误。

[root@k7q28enzlq4y2bf8 live]# certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Processing /etc/letsencrypt/renewal/example.com.conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Renewing an existing certificate for example.com
Performing the following challenges:
http-01 challenge for example.com
Cleaning up challenges
Failed to renew certificate example.com with error: Problem binding to port 80: Could not bind to IPv4 or IPv6.

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Processing /etc/letsencrypt/renewal/example.com.conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Renewing an existing certificate for example.com domains
Performing the following challenges:
http-01 challenge for example.com
Cleaning up challenges
Failed to renew certificate example.com with error: Problem binding to port 80: Could not bind to IPv4 or IPv6.

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All renewals failed. The following certificates could not be renewed:
  /etc/letsencrypt/live/example.com/fullchain.pem (failure)
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1 renew failure(s), 0 parse failure(s)

正确操作

[root@k7q28enzlq4y2bf8 live]# certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Processing /etc/letsencrypt/renewal/example.com.conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Renewing an existing certificate for example.com and cla.example.com
Performing the following challenges:
http-01 challenge for cla.example.com
Waiting for verification...
Cleaning up challenges

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new certificate deployed without reload, fullchain is
/etc/letsencrypt/live/example.com/fullchain.pem
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Processing /etc/letsencrypt/renewal/example.com.conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Renewing an existing certificate for example.com and 2 more domains
Performing the following challenges:
http-01 challenge for www.example.com
http-01 challenge for example.com
Waiting for verification...
Cleaning up challenges

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new certificate deployed without reload, fullchain is
/etc/letsencrypt/live/example.com/fullchain.pem
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Congratulations, all renewals succeeded: 
  /etc/letsencrypt/live/example.com/fullchain.pem (success)
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最后输出Congratulations, all renewals succeeded，大功告成，证书已成功续签！