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Key-Value Pairs Parser Plugin for Fluentd

This plugin is forked fluent-plugin-kv-parser.


This is a parser plugin for Fluentd. Learn more about parser plugins here.

This plugin allows you to parse inputs that look like key-value pairs. For example, if your text logs look like

"this_field=10000  that_field=hello time=2013-01-01T12:34:00"

It is parsed as

{"this_field":10000, "that_field":"hello"}

with the event's time being 2013-01-01T12:34:00

How to Install and Use

For Fluentd,

gem install fluent-plugin-kvp-parser

For Treasure Agent,

/usr/sbin/td-agent-gem install fluent-plugin-kvp-parser

Then, for parser-plugin enabled input plugins (including in_tail, in_tcp, in_udp and in_syslog), you can just write format kv

For example, using in_tcp with the following configuration:

  type tcp
  port 24225
  tag kv_log
  format kv
  time_key my_time
  types k1:integer,my_time:time
<match kv_log>
  type stdout


echo 'my_time=2014-12-31T00:00:00 k1=1234 k2=hello' | nc localhost 24224


2014-12-31 00:00:00 +0000 kv_log: {"k1":1234,"k2":"hello"}


  • kv_delimiter: The delimiter for key-value pairs. By default \t\s (one or more whitespace/tabs).

    • kv_delimiter a splits on one or more "a"s
    • kv_delimiter ab splits on one or more "a"s or "b"s
  • kv_char: The string to split the key from the value. By default, it is "=".

  • time_key: The time key field among the key-value pairs to be used as the time for the event. If missing or unparsable, the current time is used.

  • types: The parameter to convert the values of key-value pairs. The syntax is <key_name>:<type_name>. For example, to convert the key "k1" into integer, write types k1:integer. For the time type, one can write <key_name>:time:<time_format> to convert the string into a time object. For example, to convert the string "my_time=12/31/2014 12:00:00", use my_time:time:%m/%d/%Y %H:%M:%S. This parameter is same as the one used for in_tail and others (see under the "types" section over there).

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