One match rule and multiple logging files

[Emanuele Bastianelli]

Hi all,

I'm a very new user in Fluentd. I'm trying to understand if it is possible to have a single match rule that write to different log files. More specifically, I'd like to write a match rule for a http source, that given a certain part of the accepted URL, will redirect the output to a specific file. The match rule would be something like:

<match myapp.*>
  @type file
  # something that will parse the tag and extract the string corresponding to *
  path /var/log/fluent/access+*
</match>

so that if Flunetd receive the request

my.domain.com:9880/myapp.1?json=...

it will write the output to a file like 

access1.[date_string]

and if it receives 

my.domain.com:9880/myapp.2?json=...

it will write to

access2.[date_string]

I know I might write a match rule for every possible path, but I'd like it to be dynamic. I understood I might do it embedding a little bit of Ruby inside the matching rule, but the syntax to use is not particularly clear from the config file documentation. Moreover, if there's a more specific guide and examples of the config file documentation, can you point it at me?

Thank you very much

[Mr. Fiber]

For tag and tag parts, you can use fluent-plugin-forest plugin for dynamic configuration.

https://github.com/tagomoris/fluent-plugin-forest

> I understood I might do it embedding a little bit of Ruby inside the matching rule

This is interpreted during parsing phase so this feature doesn't help your runtime case.

Masahiro

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