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Reducer

This is the Reducer component of the bwNetFlow platform. It supports taking protobuf-encoded flow messages from a specified Kafka topic, reducing the message to some specified minimum, and writing the result back into another Kafka topic.

The intention is to enable a Kafka topic of anonymous Flow messages within the bwNetFlow project. The default subset of fields this processor limits flow messages to are just Bytes, Packets, Etype, and Proto of the flow, which can be considered fully anonymous and is quite sufficient to demonstrate the API.

It also supports some experimental, subnet-based anonymisation.

Usage

The simplest call could look like this, which would start the reducer process with TLS encryption and SASL auth enabled and all outputs working.

export KAFKA_SASL_USER=prod-reducer
export KAFKA_SASL_PASS=somesecurepass`
./reducer \
        --kafka.brokers=kafka.local:9093 \
        --kafka.in.topic=flows-enriched \
        --kafka.out.topic=flows-anon \
        --kafka.consumer_group=reducer-prod

Check --help for a full list of options and also see our Dockerfile for some more examples.