阿里云ssl证书申请的步骤就不详细介绍了
地址:阿里云

1.下载证书
选择nginx版本

2.配置ca证书

我的nginx的安装目录为: /usr/local/nginx/

cd /usr/local/nginx/

进入配置文件目录，增加cert/文件夹

cd conf
mkdir cert

把刚刚下载的两个文件上传到cert/文件夹中

开始配置

vi nginx.conf

把下面的代码粘贴进去：

server {
        listen  443 ssl;
        server_name xxx.cn;

        ssl_certificate       cert/5568612_xxx.cn.pem;
        ssl_certificate_key   cert/5568612_xxx.cn.key;

        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1.1 TLSv1.2;
        ssl_prefer_server_ciphers on;
        location / {
            index  index.html index.htm index.php server.php;
            try_files $uri $uri/ /index.php?$query_string;
        }
        location ~ \.php(.*)$ {
            fastcgi_pass   127.0.0.1:9000;
            fastcgi_index  index.php;
            fastcgi_split_path_info  ^((?U).+\.php)(/?.+)$;
            fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
            fastcgi_param  PATH_INFO  $fastcgi_path_info;
            fastcgi_param  PATH_TRANSLATED  $document_root$fastcgi_path_info;
            include        fastcgi_params;
        }
}

server {
       listen 80;
       server_name xxx.cn;
       return 301  https://$host$request_uri;#将http请求转为https
}
	

nuxt https相关配置

upstream nodenuxt {
   server 127.0.0.1:3000; #nuxt
   keepalive 64;
}
server {
   listen 80;
   server_name test.cn;
   return 301  https://$host$request_uri;#将http请求转为https
}
server {
   listen  443 ssl;
   server_name test.cn;

   ssl_certificate       cert/5568612_test.cn.pem;
   ssl_certificate_key   cert/5568612_test.cn.key;

   ssl_session_timeout 5m;
   ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
   ssl_protocols TLSv1.1 TLSv1.2;
   ssl_prefer_server_ciphers on;
   location / {
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
         proxy_set_header Host $host;
         proxy_set_header X-Nginx-Proxy true;
         proxy_cache_bypass $http_upgrade;
         proxy_pass http://nodenuxt;#代理
   }
}

配置完成后，检查一下nginx配置文件是否可用，有successful表示可用。

nginx -t // 检查nginx配置文件

配置正确后，重新加载配置文件使配置生效：

killall nginx
/usr/local/nginx/sbin/nginx

至此，nginx的https访问就完成了，并且通过return 301重定向方式把所有http请求也转成了https请求，更加安全。