openresty 使用 log_by_lua 发送日志到 syslog-ng，

openresty 使用 log_by_lua 发送日志到 syslog-ng，

1. 安装

opmgetp0pr0ck5/lua-resty-logger-socket

2. 使用

location   lua_by_lua_block

log_by_lua_block {

local logger = require "resty.logger.socket"

ngx.log(ngx.ERR, "Test Syslog: ", "call")

if not logger.initted() then

local ok, err = logger.init {

host="syslog-ng-host",

port=514,

sock_type="udp",

flush_limit = 1,

--drop_limit = 5678

}

if not ok then

ngx.log(ngx.ERR, "failed to initialize the logger: ", err)

return

end

end

-- construct the custom access log message in

-- the Lua variable "msg"

local url = ngx.var.uri

local method = ngx.req.get_method()

local headers = ngx.req.raw_header(true)

-- tbl

local params_var = ngx.req.get_uri_args()

local client_ip = ngx.var.remote_addr

-- tbl

local user_agent = ngx.req.get_headers()["User-Agent"]

local referer = ngx.req.get_headers()["Referer"] or ""

local cookies = ngx.req.get_headers()["Cookie"]

local bytes, err = logger.log("test")

local bytes, err = logger.log(client_ip.." "..table.concat(params_var).." "..user_agent.." "..referer.." "..cookies.." "..url.." "..method)

if err then

ngx.log(ngx.ERR, "failed to log message: ", err)

return

end

}

3. log server

syslog-ng  其中启用  udp  server  同时可以安装对应的后端storage

yum  install-y syslog-ng

4.  log 查询

syslog-ng  server

tail  - f /var/log/message

5. 参考资料

https://syslog-ng.org/

https://github.com/cloudflare/lua-resty-logger-socket