Formatter Plugins
Fluentd has nine (9) types of plugins:
This article gives an overview of the Formatter Plugin.
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.
For an output plugin that supports Formatter, the
<format>
directive can be used to change the output format.2014-08-25 00:00:00 +0000<TAB>foo.bar<TAB>{"k1":"v1", "k2":"v2"}
However, if you set
@type json
in <format>
like this:<match foo.bar>
@type file
path /path/to/file
<format>
@type json
</format>
</match>
The output changes to
{"k1":"v1", "k2":"v2"}
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.
If this article is incorrect or outdated, or omits critical information, please let us know.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 1yr ago