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

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quit

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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

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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")

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server {

  listen 8867;

  server_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';

  }

}