centos7+nginx使用Certbot让网站拥有https

certbot官网

1.获取certbot-auto

####  下载
wget https://dl.eff.org/certbot-auto

####  给予权限
chmod a+x ./certbot-auto

2.使用

#### 请改为自己的域名
./certbot-auto --server https://acme-v02.api.letsencrypt.org/directory -d "*.xxx.com" -d "xxx.com" --manual --preferred-challenges dns-01 certonly

####  出现如下 输入邮箱
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): 

####  输入A同意
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-v02.api.letsencrypt.org/directory
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(A)gree/(C)ancel: 

####  输入Y同意
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 our work
encrypting the web, EFF news, campaigns, and ways to support digital freedom.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: 

####  输入Y确认
NOTE: The IP of this machine will be publicly logged as having requested this
certificate. If you're running certbot in manual mode on a machine that is not
your server, please ensure you're okay with that.

Are you OK with your IP being logged?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: 

####  域名添加TXT解析  添加对应的域名和值 添加好后回车继续
Please deploy a DNS TXT record under the name
xxxx.xxxx.com with the following value:

xxxxxxxx

Before continuing, verify the record is deployed.
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Press Enter to Continue

####  出现如下即成功
IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/xxxxx.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/xxxxx.com/privkey.pem
   Your cert will expire on 2018-12-28. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot-auto
   again. To non-interactively renew *all* of your certificates, run
   "certbot-auto renew"
 - 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.
 - 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

3.nginx配置

server{
  listen  80;
  listen [::]:80;
  server_name  xxx.xxx.com;
  return         301 https://$server_name$request_uri;
}
server {
        listen 443 ssl;
        server_name xxx.xxx.com;
        ssl on;
        ssl_certificate /etc/letsencrypt/live/xxx.xxx.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/xxx.xxx.com/privkey.pem;
        ssl_session_cache shared:SSL:20m;
        ssl_session_timeout  10m;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE:!kEDH;
        ssl_prefer_server_ciphers on;
        ssl_stapling on;
        ssl_stapling_verify on;
        ssl_trusted_certificate /etc/letsencrypt/live/xxx.xxx.com/chain.pem; 
        #启用 HSTS 用于通知浏览器强制使用 https 通信
        add_header Strict-Transport-Security "max-age=31536000";
        resolver 8.8.8.8 8.8.4.4;
        
        
        ........
   }