Option to disable time portion of the path with out_file output

[gemyago]

Hi,

Currently out_file will always append time to file name. It would be good to have an option to disable that so it'll always be writing to the same file. It's easier to find last log if it's path is not time sliced and it's easy to setup logrotate that will rotate the files in a more flexible way.

[repeatedly]

@tagomoris How about this?

In v0.14, we can remove time slice with like below:

<match test.**>
  @type file
  path out/${tag}

  <buffer tag>
    flush_at_shutdown true
  </buffer>
  # ... other parameters
</match>

But default chunk_keys is ["time"], so we can't use <buffer> in the configuration.

[tagomoris]

As a quick hack, this configuration seems to work as expected (write all matched events into a file without time in path):

<match test.**>
  @type file
  path out/mytest
  append true
  <buffer []>
    flush_interval 5s
  </buffer>
</match>

It looks very hacky, but it might be better to add configuration parameter in out_file to control default chunk key if there are many requests for such configuration.

[gemyago]

Hi @tagomoris,

Thanks, this hint works. Looks hacky agree, but it works so who cares :). Is there any documentation on this style of buffer config? I can't seems to find one...

[tagomoris]

Unfortunately, these documentations are not written yet. I'll use this month for documentation tasks...

[gemyago]

That's ok. I've found few bits here and there so have everything I need. Thanks for your help!

[repeatedly]

Added to the document about <buffer []>.
Will be updated after heroku comes back.