Any recommendation for structured logging library in Golang?

[ChrisLu]

I am considering moving from glog to structured logging. I tried logrus, go-kit, uber/zap, but could not find one good fit. In short, this is the desired format:

[info][timestamp] [filename:line_number] message k1=v1 k2=v2 ...

It shows the correct file name(need to pop out a few call stacks) and line number in a customizable format, not as key-value pair for each line which is just too verbose to have the extra "time=" "file=".

Please let me know the one you actually use.

Thanks!

Chris

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https://github.com/chrislusf/seaweedfs

[Mike Spreitzer]

> From: ChrisLu <chri...@gmail.com>
> To: golang-nuts <golan...@googlegroups.com>
> Date: 11/17/2020 11:22 PM
> Subject: [EXTERNAL] [go-nuts] Any recommendation for structured
> logging library in Golang?
> Sent by: golan...@googlegroups.com

How about one that has fine-grained debug leveling, like glog or klog,
too?

Thanks,
Mike

[Gopal M]

go.uber.org/zap

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Regards,
M. Gopal

[Chris Lu]

On Tue, Nov 17, 2020 at 11:20 PM Gopal M <gopalt...@gmail.com> wrote:

go.uber.org/zap

I have tried uber/zap, which has a verbose json:
{time="...", file="abc.go", line="32", message="xafasdfasdf", k1=v1, k2=v2}

The extra "time=" and "file=" on every single log line are what I want to avoid. 

Do you have some way to change the log format?

[Tamás Gulácsi]

This format is quite specific - roll your own!

See for example https://github.com/shamaazi/antilog or a derivative (github.com/UNO-SOFT/ulog) - very simple code, easy to modify.

My experience is against logfmt: is is nice, human-readable, but it is hard to log structures with it - you'll use fmt.Sprintf("%#v", structure), or json.Marshal(structure).

[seank...@gmail.com]

Since you've been using glog, k8s.io/klog/v2 (fork by kubernetes) should feel familiar and v2 supports the structured variants

[Denis Cheremisov]

Zerolog does the trick, need a bit of setup though for what you want

среда, 18 ноября 2020 г. в 07:21:48 UTC+3, ChrisLu:

[Space A.]

If you want to go for structured and layered logging in JSON, consider https://github.com/francoispqt/onelog

четверг, 19 ноября 2020 г. в 12:14:21 UTC+3, Denis Cheremisov: