This plugin generates from the value of the specified field the path of the file to be output.

Fluentd v1.0 has placeholders. So this plugin will not support v1.0 or later. I recommend using placeholders instead of using this plugin.

Add this line to your application's Gemfile:

gem 'fluent-plugin-parameterized-path'

And then execute:

$ bundle

Or install it yourself as:

$ gem install fluent-plugin-parameterized-path

Path prefix of output files.

Set the key of the field where part of the path is stored.

If set to true, append the data to the file. The default is false.

If set to gzip, the output file will be compressed. The default is nil.

see http://docs.fluentd.org/articles/formatter-plugin-overview. The default is out_file.

This plugin inherit the Fluent::TimeSlicedOutput class. So, you can set the configurations of the Fluent::TimeSlicedOutput class. see http://docs.fluentd.org/articles/output-plugin-overview#time-sliced-output-parameters

<match dummy>
    @type parameterized_path
    path_prefix /var/log/subs
    path_key path_is_here
</match>

If your inputs is

{"path_is_here": "/oh/my/log", "message": "hello"}
{"path_is_here": "path/to/file", "message": "world"}

File is created as follows

$ find /var/log/subs/**/*.log
/var/log/subs/oh/my/log.2016121314.log
/var/log/subs/path/to/file.2016121314.log

$ cat /var/log/subs/oh/my/log.2016121314.log
2016-12-13T14:15:16[TAB]dummy[TAB]{"message":"hello"}

$ cat /var/log/subs/path/to/file.2016121314.log
2016-12-13T14:15:17[TAB]dummy[TAB]{"message":"world"}

Bug reports and pull requests are welcome on GitHub at https://github.com/msysyamamoto/fluent-plugin-parameterized-path. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.