使用certbot获取证书

●第一步 选择好使用的软件和系统，本文使用centos和nginx。
●第二步 使用下面命令安装相关工具。

 yum -y install yum-utils 
yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional

●第三步 安装python-cert-nginx
     yum install python2-certbot-nginx
●第四步 使用命令，获得证书
     certbot --nginx 

     输入上面的命令，按照提示信息输入 电子邮箱和域名

●第五步 打开nginx.conf 添加

server {
        listen 443 ssl;
        server_name mooche.com www.mooche.com;
        ssl_certificate /etc/letsencrypt/live/mooche.com/fullchain.pem; # managed by Certbot
        ssl_certificate_key /etc/letsencrypt/live/mooche.com/privkey.pem; # managed by Certbot
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;
        ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
        ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:50m;
        ssl_stapling on;
        ssl_stapling_verify on;
        add_header Strict-Transport-Security max-age=15768000;
        # The rest of your server block
        root /data/htdocs/mooche.com;
        index index.html index.htm;
        location / {
                try_files $uri $uri/ =404;
        }
}

●第六步 重启nginx

●第七步 配置定时任务 定时更新证书

1 1 * * 6 certbot renew --renew-hook "nginx -s reload"