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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

Message_Key_Field

If set, the value of Message_Key_Field in the record will indicate the message key. If not set nor found in the record, Message_Key will be used (if set).

Timestamp_Key

Set the key to store the record timestamp

@timestamp

Timestamp_Format

'iso8601' or 'double'

double

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 Topic_Key in the record will indicate the topic to use. E.g: if Topic_Key is router and the record is {"key1": 123, "router": "route_2"}, Fluent Bit will use topic route_2. Note that if the value of Topic_Key is not present in Topics, then by default the first topic in the Topics list will indicate the topic to be used.

rdkafka.{property}

Setting rdkafka.log.connection.close to false and rdkafka.request.required.acks to 1 are examples of recommended settings of librdfkafka properties.

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 kafka 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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