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Fluent Empty keys

A Fluentd filter plugin to filter out and removes empty keys from FluentD messages.

Installation

Gemfile content

Add this line to your application's Gemfile:

gem 'fluent-plugin-filter_empty_keys'

And then execute:

$~> bundle install

Or install it yourself as:

$~> gem install fluent-plugin-filter_empty_keys

Configurations

Configuration Ite Description
empty_keys A Key-Value list to define empty values for specific keys. By default keys with empty values will be removed, However keys with values such s 0 or undefined will not be removed. This Configuration Item can be used to remove the later keys.
keys_delimiter The character used to seperate the keys defined in empty_keys. The default value is ,
values_delimiter The character used to assign values to keys in empty_keys. The default value is :

Configuration Examples

Filter out all keys with empty values.

<filter **>
  type empty_keys
</filter>

{
  "field1":"",
  "field2":"2",
  "field3":"2013-02-12 22:04:14 UTC",
  "field4":"",
  "field5":"a,b,c"
}

{
  "field2":"2",
  "field3":"2013-02-12 22:04:14 UTC",
  "field5":"a,b,c"
}

Filter out all keys with empty, 0, Undefined values .

<filter **>
  type empty_keys
  empty_keys field0:0,field2:Undefined
</filter>

{
  "field0":0,
  "field1":"",
  "field2":"Undefined",
  "field3":"2013-02-12 22:04:14 UTC",
  "field4":"",
  "field5":"a,b,c"
}

{
  "field3":"2013-02-12 22:04:14 UTC",
  "field5":"a,b,c"
}