按以下步驟：

一、放開443端口

我的是雲服務器，默認沒開放443端口，需要先在控制臺放開

二、使用let’s encrypt 生成證書

執行以下命令：

git clone https://github.com/letsencrypt/letsencrypt

cd letsencrypt/

./letsencrypt-auto certonly --standalone --email 123917244@qq.com -d coolfirer.com -d www.coolfirer.com

郵箱和域名換成自己的即可。

看到上圖就說明成功，nginx用到fullchain.pem和privkey.pem兩個。

三、配置nginx

修改/etc/nginx/sites-available/default文件, 增加443端口

server {

    listen 443 ssl;

    server_name www.coolfirer.com coolfirer.com;

    ssl on;

    ssl_certificate /etc/letsencrypt/live/coolfirer.com/fullchain.pem;

    ssl_certificate_key /etc/letsencrypt/live/coolfirer.com/privkey.pem;

    ssl_session_timeout 5m;

    ssl_protocols SSLv3 TLSv1;

    ssl_ciphers ALL:
 
!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv3:+EXP;

    ssl_prefer_server_ciphers on;

    location / {

        proxy_pass http://127.0.0.1:8090;

        proxy_set_header Host $host;

        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    }

}

同時，配置80端口跳轉到443：

server {

    listen   
 
80;

    server_name www.coolfirer.com coolfirer.com;

    return 301 https://$server_name$request_uri;

}

四、重新加載nginx

nginx -s reload

nginx接入let's encrypt