使用certbot为网站服务添加https免费安全认证

certbot的网站主页  https://certbot.eff.org/lets-encrypt/centosrhel7-nginx

以下主要记录在操作时候的一些注意事项

一、准备工作

      1、首先要有域名，配置好nginx ,必须使用80端口，供certbot访问认证

      2、在认证的过程中会出现一个  requests认证的bug，推荐  pip2.7 install request==2.6.0fg

二、操作步骤
 

[root@webserver ~]# certbot --nginx
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org

Which names would you like to activate HTTPS for?
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1: boc.jsruiyin.com
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Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 1
Cert not yet due for renewal

You have an existing certificate that has exactly the same domains or certificate name you requested and isn't close to expiry.
(ref: /etc/letsencrypt/renewal/boc.jsruiyin.com.conf)

What would you like to do?
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1: Attempt to reinstall this existing certificate
2: Renew & replace the cert (limit ~5 per 7 days)
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Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2
Renewing an existing certificate
Resetting dropped connection: acme-v02.api.letsencrypt.org
Deploying Certificate to VirtualHost /etc/nginx/sites-enabled/bocdev.conf

Please choose whether or not to redirect HTTP traffic to HTTPS, removing HTTP access.
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1: No redirect - Make no further changes to the webserver configuration.
2: Redirect - Make all requests redirect to secure HTTPS access. Choose this for
new sites, or if you're confident your site works on HTTPS. You can undo this
change by editing your web server's configuration.
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Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2
Traffic on port 80 already redirecting to ssl in /etc/nginx/sites-enabled/bocdev.conf

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Your existing certificate has been successfully renewed, and the new certificate
has been installed.

The new certificate covers the following domains: https://boc.jsruiyin.com

You should test your configuration at:
https://www.ssllabs.com/ssltest/analyze.html?d=boc.jsruiyin.com
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IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/boc.jsruiyin.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/boc.jsruiyin.com/privkey.pem
   Your cert will expire on 2019-11-24. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot again
   with the "certonly" option. To non-interactively renew *all* of
   your certificates, run "certbot renew"
 - If you like Certbot, please consider supporting our work by:

   Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
   Donating to EFF:                    https://eff.org/donate-le