stdout

The stdout output plugin prints events to the standard output (or logs if launched as a daemon). This output plugin is useful for debugging purposes.

It is included in Fluentd's core.

Example Configuration

<match pattern>
  @type stdout
</match>

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

Sample output:

2017-11-28 11:43:13.814351757 +0900 tag: {"field1":"value1","field2":"value2"}

where the first part shows the output time, the second part shows the tag, and the third part shows the record.

Supported Modes

• Non-Buffered

• Synchronous

Plugin Helpers

• inject

• formatter

• compat_parameters

Parameters

Common Parameters

@type

The value must be stdout.

use_logger

type	default	version
bool	true	1.19.0

If Fluentd logger outputs logs to a file, this plugin outputs events to the file as well.

If setting false, this plugin outputs events to STDOUT independently of Fluentd logger.

<buffer> Section

See Buffer Section Configurations for more details.

chunk_keys

type	default	version
array	tag	0.14.5

Overwrites the default value in this plugin.

flush_at_shutdown

type	default	version
bool	true	0.14.5

Overwrites the default value in this plugin.

chunk_limit_size

type	default	version
size	10240	0.14.5

Overwrites the default value in this plugin.

<format> Section

See Format Section Configurations for more details.

@type

type	default	version
string	stdout	0.14.5

The format of the output.

output_type

type	default	version
string	json	0.14.5

This is the option for the stdout format. Configure the format of the record (third part). Any formatter plugins can be specified.

<inject> Section

See Inject Section Configurations for more details.

If this article is incorrect or outdated, or omits critical information, please let us know.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