feat: how use apisix send log to aliyun sls

[gy09535]

Issue description

How apisix can send log to aliyun? I think ailiyun support syslog standard rfc5424( https://help.aliyun.com/document_detail/112903.html?spm=a2c4g.11186623.6.763.28801b47aqgVZq).

But the nginx support syslog standard rfc3164(http://nginx.org/en/docs/syslog.html).

And I can not find the log message format filed "STRUCTURED-DATA" in rfc3164(https://tools.ietf.org/html/rfc3164#section-4.1.1 ),But find it in rfc5424(https://tools.ietf.org/html/rfc5424?spm=a2c4g.11186623.2.17.5b0f1b47l82QJg).

So I am confused how should I use it in syslog plugin.

Environment

• apisix version (cmd: apisix version):
• OS:

[moonming]

@membphis @gxthrj please take a look

[gy09535]

I have see the repository of https://github.com/cloudflare/lua-resty-logger-socket, It just implementation socket log to send log to syslog-ng(collector) source.The syslog-ng has sources and destinations. I should publish "syslog-ng" for proxy for ali cloud log service(sls). I think should I send log to sls without proxy.

[membphis]

I think we can send the log to aliyun sls is an easy way, and that is a stable way.

use lua-resty-logger-socket is a better way.

[membphis]

another way, set syslog server in conf/config.yaml is another good method

[gy09535]

I think we can send the log to aliyun sls is an easy way, and that is a stable way.

use lua-resty-logger-socket is a better way.

Agree with you and I use cosocket implementation it, please review

[membphis]

welcome PR，then the community can share this feature. ^_^

[gy09535]

welcome PR，then the community can share this feature. ^_^

I use cosocket and processor to send logs to sls , users can define different routes or services plugins to send logs to different log store which in sls.Users can use sls do anything such as data analysis monitor and alarm etc. For how to use I finish the doc, users can reference sls logger doc to use it. The PR is finished please review @membphis @moonming. According to #2177