nginx+letsencrypt搭建https站点

1. 申请好自己的域名 dockerhub.xxx.com，并解析好IP。

2. 安装nginx（默认开通了http） ，修改

server_name  dockerhub.xxxx.com;

    启动。

3. 安装 certbot ， 我是centos7 ,参考地址：https://certbot.eff.org/#centosrhel7-nginx

4. 生成证书并自动修改nginx 配置， 完成。

[root@instance-1 ~]# certbot --nginx
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): youmail@qq.com
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org

-------------------------------------------------------------------------------
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server at
https://acme-v01.api.letsencrypt.org/directory
-------------------------------------------------------------------------------
(A)gree/(C)ancel: A

-------------------------------------------------------------------------------
Would you be willing to share your email address with the Electronic Frontier
Foundation, a founding partner of the Let's Encrypt project and the non-profit
organization that develops Certbot? We'd like to send you email about EFF and
our work to encrypt the web, protect its users and defend digital rights.
-------------------------------------------------------------------------------
(Y)es/(N)o: Y
Starting new HTTPS connection (1): supporters.eff.org
No names were found in your configuration files. Please enter in your domain
name(s) (comma and/or space separated)  (Enter 'c' to cancel): 
Please specify --domains, or --installer that will help in domain names autodiscovery, or --cert-name for an existing certificate name.

IMPORTANT NOTES:
 - Your account credentials have been saved in your Certbot
   configuration directory at /etc/letsencrypt. You should make a
   secure backup of this folder now. This configuration directory will
   also contain certificates and private keys obtained by Certbot so
   making regular backups of this folder is ideal.
[root@instance-1 ~]# certbot --nginx
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org

Which names would you like to activate HTTPS for?
-------------------------------------------------------------------------------
1: dockerhub.xxxxx.com
-------------------------------------------------------------------------------
Select the appropriate numbers separated by commas and/or spaces, or leave input
blank to select all options shown (Enter 'c' to cancel): 1
Obtaining a new certificate
Performing the following challenges:
tls-sni-01 challenge for dockerhub.xxxxx.com
Waiting for verification...
Cleaning up challenges
Deployed Certificate to VirtualHost /etc/nginx/nginx.conf for set(['dockerhub.hecmcc.com'])

Please choose whether or not to redirect HTTP traffic to HTTPS, removing HTTP access.
-------------------------------------------------------------------------------
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.
-------------------------------------------------------------------------------
Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2
Redirecting all traffic on port 80 to ssl in /etc/nginx/nginx.conf

-------------------------------------------------------------------------------
Congratulations! You have successfully enabled https://dockerhub.hecmcc.com

You should test your configuration at:
https://www.ssllabs.com/ssltest/analyze.html?d=dockerhub.hecmcc.com
-------------------------------------------------------------------------------

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/dockerhub.xxxxx.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/dockerhub.xxxxx.com/privkey.pem
   Your cert will expire on 2018-03-08. 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