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Counter is a very simple plugin that counts how many records it's getting upon flush time. Plugin output is as follows:

Getting Started

You can run the plugin from the command line or through the configuration file:

Command Line

From the command line you can let Fluent Bit count up a data with the following options:
$ fluent-bit -i cpu -o counter

Configuration File

In your main configuration file append the following Input & Output sections:
Name cpu
Tag cpu
Name counter
Match *


Once Fluent Bit is running, you will see the reports in the output interface similar to this:
$ bin/fluent-bit -i cpu -o counter -f 1
Fluent-Bit v0.12.0
Copyright (C) Treasure Data
[2017/07/19 11:19:02] [ info] [engine] started
1500484743,1 (total = 1)
1500484744,1 (total = 2)
1500484745,1 (total = 3)
1500484746,1 (total = 4)
1500484747,1 (total = 5)
Last modified 4yr ago