openresty 使用 log_by_lua 发送日志到 syslog-ng

1. 安装

1. opm get p0pr0ck5/lua-resty-logger-socket

2. 使用

location   lua_by_lua_block

1. log_by_lua_block {
2. local logger = require "resty.logger.socket"
3. ngx.log(ngx.ERR, "Test Syslog: ", "call")
4. if not logger.initted() then
5. local ok, err = logger.init {
6. host="syslog-ng-host",
7. port=514,
8. sock_type="udp",
9. flush_limit = 1,
10. --drop_limit = 5678
11. }
12. if not ok then
13. ngx.log(ngx.ERR, "failed to initialize the logger: ", err)
14. return
15. end
16. end
18. -- construct the custom access log message in
19. -- the Lua variable "msg"
20. local url = ngx.var.uri
21. local method = ngx.req.get_method()
22. local headers = ngx.req.raw_header(true)
23. -- tbl
24. local params_var = ngx.req.get_uri_args()
25. local client_ip = ngx.var.remote_addr
26. -- tbl
27. local user_agent = ngx.req.get_headers()["User-Agent"]
28. local referer = ngx.req.get_headers()["Referer"] or ""
29. local cookies = ngx.req.get_headers()["Cookie"]
30. local bytes, err = logger.log("test")
31. local bytes, err = logger.log(client_ip.." "..table.concat(params_var).." "..user_agent.." "..referer.." "..cookies.." "..url.." "..method)
32. if err then
33. ngx.log(ngx.ERR, "failed to log message: ", err)
34. return
35. end
37. }

3. log server

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

1. yum install -y syslog-ng

4.  log 查询

syslog-ng  server

1. tail - f /var/log/message

5. 参考资料

https://syslog-ng.org/

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