当前只有https才支持http2协议，nginx需要开启支持http2的模块with-http_v2_module
安装过程参考上一篇:https://blog.csdn.net/u011943534/article/details/118384917

安装过程中，添加http2即可

./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-http_v2_module
make & make install

在nginx.conf中server的listener中添加http2支持

server {
                    limit_conn conn_aming 600;

        listen   1443 ssl http2;
        server_name  172.16.10.168;

                ssl_certificate ../sslkey/server.crt;
                ssl_certificate_key ../sslkey/server.key.unsecure;
                ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
                ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
                    ssl_prefer_server_ciphers on;

                location /* {
                        root html;
                        index index.html index.htm;
                }

                location /demo {
                        proxy_pass http://newframe/demo;
                        proxy_set_header X-forward-for $proxy_add_x_forwarded_for;
                        proxy_set_header Host $host;
                        proxy_set_header X-Real-Ip $remote_addr;
                        limit_rate_after 51200k;
                        limit_rate 800000k;
                        limit_req zone=req_aming burst=500;
                        client_max_body_size 512m;

                }

使用浏览器访问，通过控制台查看http协议，发现h2就是已经使用http2协议了