openresty + njs 提升系统nginx 的扩展性

使用了docker 构建，具体的参考github，已经包含了一个现成的docker镜像dalongrong/openresty-tengine:debug-njs

参考构建

./configure --add-dynamic-module=path-to-njs/nginx

参考使用

app.js

function hello(r) {

    r.return(200, "Hello world!");

}
 
export default {hello};

配置

worker_processes  auto;

user root;  

master_process on;

events {

    worker_connections  1024;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

    sendfile        on;

    root html;

    # 加载配置

    js_import /usr/local/openresty/nginx/html/app.js;

    keepalive_timeout  65;

    gzip  on;

    upstream cluster1 {

        # simple round-robin

        server app2:80;

        server app3:80;

        check interval=1000 rise=2 fall=5 timeout=1000 type=http;

        check_http_send "HEAD / HTTP/1.0\r\n\r\n";

        check_http_expect_alive http_2xx http_3xx;

    }  

     upstream cluster2 {

        # simple round-robin

        server app2:80;

        server app3:80;

        check interval=1000 rise=2 fall=5 timeout=1000 type=http;

        check_http_send "HEAD / HTTP/1.0\r\n\r\n";

        check_http_expect_alive http_2xx http_3xx;

    } 

    server {

        listen       81;

        server_name  localhost;

        charset utf-8;

        default_type text/html;

        location / {

            index index.html;

        }

        location = /dalongdemo {

            content_by_lua_block {

                ngx.say('Hello,world!')

            }

        }

        location /status {

            healthcheck_status;

        }

        location /app.html {

            sub_filter '<a href="http://dalong:9090/'  '<a href="http://$host/';

            sub_filter_once off;

            sub_filter_types *;

            root html;

        }

        location /css/ {

            trim on;

            trim_js on;

            trim_css on;

            concat on;

            concat_max_files 20;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }    

    }

    server {

        listen       80;

        server_name  localhost;

        charset utf-8;

        default_type text/html;

        location / {

            proxy_set_header Host $http_host;

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for; 

            client_body_buffer_size 10M;

            client_max_body_size 10G;

            proxy_buffers 1024 4k;

            proxy_read_timeout 300;

            proxy_connect_timeout 80;

            proxy_pass http://cluster1;

            footer "<!-- dalong demo-->";  

        }

        location /status {

            healthcheck_status;

        }

        location /dalong {

           # 使用

            js_content app.hello;

        }

        location /app.html {

            sub_filter 'href="http://dalong:9090'  'href="http://$host/';

            sub_filter_once off;

            sub_filter_types *;

            root html;

        }

        location = /dalongdemo {

            content_by_lua_block {

                ngx.say('Hello,world!')

            }

        }

        location /css/ {

            trim on;

            trim_js on;

            trim_css on;

            concat on;

            concat_max_files 20;

        }

        error_page   500 502 503 504  /50x.html;

        location = /50x.html {

            root   html;

        }    

    }    

}