Nginx与Lua灰度发布的实现

  yum install -y memcached  #启动memcached服务，端口11211，以nobody身份启动，-d后台模式运行  memcached -p11211 -u nobody -d  #将自己的IP设为灰度测试的IP  telnet 127.0.0.1 11211  set 119.32.216.122 0 0 1  1  quit

  wget https://github.com/openresty/lua-resty-memcached/archive/v0.11.tar.gz  tar -zxvf v0.11.tar.gz  mkdir -p /usr/local/share/lua/5.1  cp -r lua-resty-memcached-0.11/lib/resty /usr/local/share/lua/5.1  

  clientIP=ngx.req.get_headers()["X-Real-IP"]  if clientIP == nil then    clientIP=ngx.req.get_headers()["x_forwarded_for"]  end  if clientIP == nil then    clientIP=ngx.var.remote_addr  end    local memcached=require "resty.memcached"    local memc,err=memcached:new()    if not memc then      ngx.say("failed to instantiate memc:",err)      return    end    local ok,err =memc:connect("127.0.0.1",11211)    if not ok then      ngx.say("failed to connect:",err)      return    end    local res,flags,err =memc:get(clientIP)    --ngx.say("value key: ",res,clientIP)    if err then      ngx.say("failed to get clientIP",err)      return    end    if res == "1" then      ngx.exec("@server_test")      return    end    ngx.exec("@server_product")

    server {      listen 8867;      server_name www.siguoya.name;      root /usr/local/nginx/1.12.1/html;      location / {        content_by_lua_file /etc/nginx/test.lua;      }      location /hello {        default_type text/plain;        content_by_lua 'ngx.say("hello lua")';      }      location /ua {        default_type text/plain;        content_by_lua '          clientIP=ngx.req.get_headers()["USER-AGENT"]          ngx.say("IP:",clientIP)          ';      }      location @server_product {        default_type text/plain;        return 200 'product';      }      location @server_test {        default_type text/plain;        return 200 'test';      }    }