Nginx監控請求lua指令碼

當應答狀態碼不是200時，通過udp向伺服器傳送報告。

monitor.lua

-- 

-- config nginx.conf:
---- set $str $uri;
-- content_by_lua_file;
-- -- location /proxy $str;
-- }
----
-- extends int to 4 byte
--function pad32bit(num)
local hex = ""
local rem = num
for i=1,4 do
local bit = rem % 256
rem = math.floor(rem /256)
hex = hex .. string.char(bit)
endreturn hex
endlocal url = ngx.var.uri
local res = ngx.location.capture("/proxy", })
-- response
ngx.say(res.body)
-- send udp message
if res.status ~= 200 then
-- protocol
-- length | version | top-level no (4) | second-level no | json body
--local mydata = require "mydata"
--local udpsock = mydata:socket()
local udpsock = ngx.socket.udp()
udpsock:settimeout(0)
local ok, err = udpsock:setpeername("224.3.29.71", 10000)
local body = "host:" .. ngx.var.host .. ", url:" .. url .. ", status:" .. res.status
local leng = 4 + 3 + string.len(body)
local msg = pad32bit(leng) .. "\1\4\1" .. body
ngx.say("")
local ok, err = udpsock:send(msg)
end

nginx.conf

upstream web

server 
location /proxy

--local mydata = require "mydata"

--local udpsock = mydata:socket()

這種方式只能共享基本型別，不能共享socket

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