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基于Nginx&Lua 和Netflix Eureka的微服务网关

基于Nginx&Lua 和Netflix Eureka的微服务网关
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Zuul for Nginx&Lua

基于Nginx和Lua module。需要安装Nginx Lua模块或者直接下载openresty编译安装。

安装和配置ngx-lua-zuul

下载代码到/path/to/nginx/lua/lib/

git clone http://github.com/tietang/ngx-lua-zuul –depth=1

配置nginx.conf

从nginx.conf.default 复制nginx.conf,也可以copy下面的例子并保存为nginx.conf,以快速运行。

在nginx.conf的http节点中添加:

    lua_package_path "/Users/tietang/nginx/nginx/lua/lib/?.lua;;";     lua_shared_dict discovery 10m;      lua_shared_dict apps_count 1m;     lua_shared_dict apps_res_time 10m;     lua_shared_dict api_count 10m;     lua_shared_dict api_res_time 10m;      init_by_lua '         discovery = require "discovery"         json=require "cjson"         balancer=require "robin"         router = require "router"         ';     init_worker_by_lua '         discovery:schedule()      ';

location 中添加:

 location / {             set $bk_host '';               # default_type text/html;             access_by_lua_file lua/lib/app_route.lua;                proxy_set_header Host   $host;             proxy_set_header   X-Real-IP        $remote_addr;             proxy_pass http://$bk_host;             log_by_lua_file lua/lib/stats.lua;             #  }

下面是一个完整的例子:

#user  nobody; worker_processes  2;  #error_log  logs/error.log; #error_log  logs/error.log  notice; #error_log  logs/error.log  info;  #pid        logs/nginx.pid;   events {     worker_connections  1024; }   http {     include       mime.types;     default_type  application/octet-stream;      #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '     #                  '$status $body_bytes_sent "$http_referer" '     #                  '"$http_user_agent" "$http_x_forwarded_for"';      #access_log  logs/access.log  main;      sendfile        on;     #tcp_nopush     on;      #keepalive_timeout  0;     keepalive_timeout  65;      #gzip  on;     ##lua 代码路径     lua_package_path "/Users/tietang/nginx/nginx/lua/lib/?.lua;;";     ##一些共享缓存     lua_shared_dict discovery 10m;      lua_shared_dict apps_count 1m;     lua_shared_dict apps_res_time 10m;     lua_shared_dict api_count 10m;     lua_shared_dict api_res_time 10m;     lua_shared_dict metrics 10m;     lua_shared_dict metrics_time 10m;     ##初始化     init_by_lua '         discovery = require "discovery"         json=require "cjson"         balancer=require "robin"         router = require "router"        ';     ## 初始化定时器     init_worker_by_lua '         discovery:schedule()     ';      server {         listen       8000;         server_name  localhost;          #charset koi8-r;          #access_log  logs/host.access.log  main;          location = / {             set $dir $document_root;             root   $dir/html;             index  index.html index.htm;         }          # Dashboard路径         location ^~ /_dashboard {             set $dir "./html";              # root   $dir/html/;             alias $dir;             index  index.html index.htm;           }         # 静态文件路径         location ^~ /public/ {             set $dir "./html/public/";             alias $dir;         }         # 一些管理功能-例子统计         location = /_admin/stats {             default_type text/html;              content_by_lua_file lua/lib/stats_show.lua;         }          location = /_admin/stats.json {              default_type application/json;              content_by_lua_file lua/lib/stats_show_json.lua;         }          location = /_admin/data.json {              default_type application/json;              content_by_lua '                 local v={}                 v.date=ngx.now()*1000                 -- string.gsub(ngx.localtime()," ",":")                 v.close=math.random(2,100)                   ngx.say( json.encode(v))                ';         }          location = /_admin/data.tsv {              default_type application/json;              content_by_lua '                 ngx.say("date   close")                 ngx.say(string.gsub(ngx.localtime()," ",":") .. "    ".. math.random(20,600) )               ';         }          ## 请求转发处理         location / {             set $bk_host '';               # default_type text/html;             # 路由计算             access_by_lua_file lua/lib/app_route.lua;                proxy_set_header Host   $host;             proxy_set_header   X-Real-IP        $remote_addr;             proxy_pass http://$bk_host;             # 简单统计收集             log_by_lua_file lua/lib/stats.lua;             #         }           #用于调试的例子         location = /haha {              default_type application/json;             # access_by_lua_file demo/demo.lua;            content_by_lua '                 ngx.say(ngx.var.host)                 ngx.say(ngx.time())                 ngx.say(ngx.now())                 ngx.say( json.encode(router.routingTable) .."<br/>")                  ngx.say(  "<br/>")                 ngx.say(json.encode(discovery.hosts ) .."<br/>")              ';             #         }          #error_page  404              /404.html;          # redirect server error pages to the static page /50x.html         #         error_page   500 502 503 504  /50x.html;         location = /50x.html {             root   html;         }          # proxy the PHP scripts to Apache listening on 127.0.0.1:80         #         #location ~ /.php$ {         #    proxy_pass   http://127.0.0.1;         #}          # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000         #         #location ~ /.php$ {         #    root           html;         #    fastcgi_pass   127.0.0.1:9000;         #    fastcgi_index  index.php;         #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;         #    include        fastcgi_params;         #}          # deny access to .htaccess files, if Apache's document root         # concurs with nginx's one         #         #location ~ //.ht {         #    deny  all;         #}     }       # another virtual host using mix of IP-, name-, and port-based configuration     #     #server {     #    listen       8000;     #    listen       somename:8080;     #    server_name  somename  alias  another.alias;      #    location / {     #        root   html;     #        index  index.html index.htm;     #    }     #}       # HTTPS server     #     #server {     #    listen       443 ssl;     #    server_name  localhost;      #    ssl_certificate      cert.pem;     #    ssl_certificate_key  cert.key;      #    ssl_session_cache    shared:SSL:1m;     #    ssl_session_timeout  5m;      #    ssl_ciphers  HIGH:!aNULL:!MD5;     #    ssl_prefer_server_ciphers  on;      #    location / {     #        root   html;     #        index  index.html index.htm;     #    }     #}  }

例子Eureka 服务

如果没有Eureka环境,也可以编译安装本例子中的EurekaDemo服务,参考:编译和运行eureka-demo服务

运行测试

启动所有的demo服务:discovery,api,zuul;

启动nginx;

打开浏览器:http://127.0.0.1:8000/api/test/0/0

其测试api参考编译和运行eureka-demo服务中的相关内容。

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