kafka-c(): Publish messages to Apache Kafka (C implementation)

AxoSyslog can directly publish log messages to the Apache Kafka message bus, where subscribers can access them.

The kafka-c() destination uses the librdkafka client library, which scales well, uses memory efficiently, and needs no Java runtime. It replaces the earlier Java implementation, which AxoSyslog has removed. If you’re migrating a configuration written for the Java implementation, see Shifting from Java implementation to C implementation.

You can also configure this destination under the name kafka(), which is an SCL alias for kafka-c(). For details, see kafka: Publish messages to Apache Kafka.

Prerequisites

• AxoSyslog version 3.21 or later.

• This feature requires a separate module. Install the axosyslog-mod-rdkafka package on Debian/Ubuntu, or the axosyslog-kafka package on RHEL and compatible distributions. If the module isn’t installed, AxoSyslog fails to start with an unexpected LL_IDENTIFIER error.