go-kit log write to a file or any third party logger application

[mail...@gmail.com]

Hello,

     I am new and trying to use go-kit log for my application. How can I configure go-kit log to write output to both stdout/stderr and log file on the file (such as syslog or any other  file) ? Does go-kit provides a way to send log to third party application such as Logstash ?

Thanks

[Gulácsi Tamás]

As the logger only needs an io.Writer, that io.Writer can be an io.MultiWriter, which writes to os.Stderr, os.Stdout, an *os.File, whatever.

For logstash: in 5 minutes, I haven't found a ready solution (an abandoned, but simple to clean up: https://github.com/heatxsink/go-logstash, an over-engineered: https://godoc.org/github.com/elastic/beats/libbeat/outputs#Load), but the format is really easy: https://github.com/zendesk/go-httpclerk/blob/master/logstash_formatter.go

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[mail...@gmail.com]

Thanks Tamas, Is it possible to write both in console and file or send to third party log collector?

[Tamás Gulácsi]

2018. január 18., csütörtök 5:42:52 UTC+1 időpontban mail...@gmail.com a következőt írta:

Thanks Tamas, Is it possible to write both in console and file or send to third party log collector?

Yes.

For example to write to stderr (console) + a file:

logFh, err := os.Create("my.log")

if err != nil {

    panic(err)

}

defer logFh.Close()

logger := log.NewLogfmtLogger(io.MultiWriter(os.Stderr, fh))

logger.Log("msg", "a message")