A buffered output plugin for fluentd and InfluxDB
Latest commit 645065f Feb 9, 2017 @repeatedly repeatedly v1.0.0.rc2


Fluent::Plugin::InfluxDB, a plugin for Fluentd

fluent-plugin-influxdb is a buffered output plugin for fluentd and influxDB.

If you are using fluentd as a collector and want to organize your time-series data in influxDB, this is your right choice!


This version uses influxdb-ruby version 0.2.0 which no longer supports InfluxDB version 0.8 (which is also deprecated). If you are using InfluxDB version 0.8 please specify version 0.1.8 of this plugin.


fluent-plugin-influxdb fluentd ruby
>= 1.0.0 >= v0.14.0 >= 2.1
< 1.0.0 >= v0.12.0 >= 1.9

NOTE: fluent-plugin-influxdb v1.0.0 is now RC. We will release stable v1.0.0 soon.


$ fluent-gem install fluent-plugin-influxdb -v "~> 0.3"  --no-document # for fluentd v0.12 or later
$ fluent-gem install fluent-plugin-influxdb -v 1.0.0.rc1 --no-document # for fluentd v0.14 or later

Ruby 2.0 or earlier

influxdb gem requires cause gem in Ruby 2.0 or earlier. If you want to use fluent-plugin-influxdb with Ruby 2.0 or earlier, you should install cause gem before install fluent-plugin-influxdb.

We don't recommend to use Ruby 2.0 or earlier version because these are EOL. If you don't have a problem, use ruby 2.1 or later in production.


Just like other regular output plugins, Use type influxdb in your fluentd configuration under match scope:

type influxdb


host: The IP or domain of influxDB, separate with comma, default to "localhost"

port: The HTTP port of influxDB, default to 8086

dbname: The database name of influxDB, default to "fluentd". you should create the database and grant permissions first

measurement: The measurement/serise for record insertion. The default is nil.

user: The DB user of influxDB, should be created manually, default to "root"

password: The password of the user, default to "root"

retry: The finite number of retry times. default is infinite

use_ssl: Use SSL when connecting to influxDB. default to false

verify_ssl: Enable/Disable SSL Certs verification when connecting to influxDB via SSL. default to true

time_key: Use value of this tag if it exists in event instead of event timestamp

time_precision: The time precision of timestamp. default to "s". should specify either hour (h), minutes (m), second (s), millisecond (ms), microsecond (u), or nanosecond (ns)

auto_tags: Enable/Disable auto-tagging behaviour which makes strings tags.

tag_keys: The names of the keys to use as influxDB tags.

sequence_tag: The name of the tag whose value is incremented for the consecutive simultaneous events and reset to zero for a new event with the different timestamp

default_retention_policy: The retention policy applied by default. influxdb >= 0.2.3 is required to use this functionality.

retention_policy_key: The name of the key in the record whose value specifies the retention policy. The default retention policy will be applied if no such key exists. influxdb >= 0.2.3 is required to use this functionality.

Fluentd Tag and InfluxDB Series

influxdb plugin uses Fluentd event tag for InfluxDB series. So if you have events with app.event, influxdb plugin inserts events into app.event series in InfluxDB.

If you set measurement parameter, use its value instead of event tag.

Configuration Example

<match mylog.*>
  @type influxdb
  host  localhost
  port  8086
  dbname test
  user  testuser
  password  mypwd
  use_ssl false
  time_precision s
  tag_keys ["key1", "key2"]
  sequence_tag _seq

Cache and multiprocess

fluentd-plugin-influxdb is a buffered output plugin. So additional buffer configuration would be (with default values):

buffer_type memory
buffer_chunk_limit 524288 # 512 * 1024
buffer_queue_limit 1024
flush_interval 60
retry_limit 17
retry_wait 1.0
num_threads 1

The details of BufferedOutput is here.

fluentd-plugin-influxdb also includes the HandleTagNameMixin mixin which allows the following additional options:

remove_tag_prefix <tag_prefix_to_remove_including_the_dot>
remove_tag_suffix <tag_suffix_to_remove_including_the_dot>
add_tag_prefix <tag_prefix_to_add_including_the_dot>
add_tag_suffix <tag_suffix_to_add_including_the_dot>

Also please consider using fluent-plugin-multiprocess to fork multiple threads for your metrics:


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request


This package was distributed under MIT licence, see LICENCE file for details.

This plugin was written by Fang.Li and was inspired by Uken's elasticsearch plugin.