Apache Kafka

Kafka output plugin allows to ingest your records into an Apache Kafka service. This plugin use the official librdkafka C library (built-in dependency)

Configuration Parameters

Key Description default
Format Specify data format, options available: json, msgpack. json
Message_Key Optional key to store the message
Timestamp_Key Set the key to store the record timestamp @timestamp
Brokers Single of multiple list of Kafka Brokers, e.g: 192.168.1.3:9092, 192.168.1.4:9092.
Topics Single entry or list of topics separated by comma (,) that Fluent Bit will use to send messages to Kafka. If only one topic is set, that one will be used for all records. Instead if multiple topics exists, the one set in the record by Topic_Key will be used. fluent-bit
Topic_Key If multiple Topics exists, the value of TopicKey in the record will indicate the topic to use. E.g: if Topic_Key is _router and the record is {"key1": 123, "router": "route2"}, Fluent Bit will use topic _route_2. Note that the topic must be registered in the Topics list.

Getting Started

In order to insert records into Apache Kafka, you can run the plugin from the command line or through the configuration file:

Command Line

The splunk plugin, can read the parameters from the command line in two ways, through the -p argument (property), e.g:

$ fluent-bit -i cpu -o kafka -p brokers=192.168.1.3:9092 -p topics=test

Configuration File

In your main configuration file append the following Input & Output sections:

[INPUT]
    Name  cpu

[OUTPUT]
    Name        kafka
    Match       *
    Brokers     192.168.1.3:9092
    Topics      test

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