The in_dummy input plugin generates dummy events. It is useful for testing, debugging, benchmarking and getting started with Fluentd.

Example Configuration

in_dummy is included in Fluentd's core. No additional installation process is required.

<source>
  @type dummy
  dummy {"hello":"world"}
</source>

Please see the Config File article for the basic structure and syntax of the configuration file.

Parameters

type (required)

The value must be dummy.

tag (required)

The value is the tag assigned to the generated events.

dummy (optional)

The dummy data to be generated. It should be either an array of JSON hashes or a single JSON hash. If it is an array of JSON hashes, the hashes in the array are cycled through in order. By default, the value is [{"message":"dummy"}] (i.e., it continues to generate events with the record {"message":"dummy"}).

auto_increment_key (optional, string type)

If specified, each generated event has an auto-incremented key field. For example, with auto_increment_key foo_key, the first couple of events look like

2014-12-14 23:23:38 +0000 test: {"message":"dummy","foo_key":0}
2014-12-14 23:23:38 +0000 test: {"message":"dummy","foo_key":1}
2014-12-14 23:23:38 +0000 test: {"message":"dummy","foo_key":2}

rate (optional, integer type)

It configures how many events to generate per second. The default value is 1.

log_level option

The log_level option allows the user to set different levels of logging for each plugin. The supported log levels are: fatal, error, warn, info, debug, and trace.

Please see the logging article for further details.

If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is a open source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.