/9t

9t is multi-file tailer by golang

Primary LanguageGo

9t

Build Status Coverage Status

9t (nine-tailed fox in Japanese) is a multi-file tailer (like tail -f a.log b.log ...).

Usage

$ 9t file1 [file2 ...]

This folk version has additional options to work with named pipes.

9t -l lable1:file1 -p named_pipe1 -l -p label2:named_pipe2 [file2 ...]

You can follow logs without creating files using Bash Process Substitution. For example, to work with ping, kubectl logs and kubectl get events:

9t \
    -p -l ping-local:<(ping 127.0.0.1) \
    -p -l somepod:<(kubectl -f logs somepod) \
    -p -l k8s-events:<(kubectl get events --watch)

Demo

Demo

  1. Preparation for demo

    $ yukari() { echo '世界一かわいいよ!!' }
$ while :; do       yukari >> tamura-yukari.log ; sleep 0.2 ; done
$ while :; do echo $RANDOM >> random.log        ; sleep 3   ; done
$ while :; do         date >>      d.log        ; sleep 1   ; done

  2. Run

    $ 9t tamura-yukari.log random.log d.log

Installation

$ go get github.com/gongo/9t/cmd/9t

Motivation

So far, Multiple file display can be even tail -f.

Demo

But, I wanted to see in a similar format as the heroku logs --tail.

app[web.1]: foo bar baz
app[worker.1]: pizza pizza
app[web.1]: foo bar baz
app[web.2]: just do eat..soso..
.
.

License

MIT License