Fluentd
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Formatter Plugins
Fluentd has nine (9) types of plugins:
This article gives an overview of the Formatter Plugin.
Overview
Sometimes, the output format for an output plugin does not meet one's needs. Fluentd has a pluggable system called Formatter that lets the user extend and re-use custom output formats.
How To Use
For an output plugin that supports Formatter, the
<format> directive can be used to change the output format.1
2014-08-25 00:00:00 +0000<TAB>foo.bar<TAB>{"k1":"v1", "k2":"v2"}
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However, if you set
@type json in <format> like this:1
<match foo.bar>
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@type file
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path /path/to/file
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<format>
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@type json
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</format>
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</match>
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The output changes to
1
{"k1":"v1", "k2":"v2"}
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i.e., each line is a single JSON object without "time" and "tag" fields. If you want to include "time" and "tag", use Inject section.
List of Built-in Formatters
List of Output/Filter Plugins with Formatter Support
If this article is incorrect or outdated, or omits critical information, please let us know.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.
Last modified 4mo ago