Background

https://github.com/confluentinc/librdkafka/wiki/Language-bindings-development#reporting-client-software-name-and-version-to-broker

Proposal

Add following to DEFAULT_CONFIG

{
  "client.software.name": "rdkafka-ruby",
  "client.software.version": "v#{Rdkafka::VERSION}-librdkafka-v#{Rdkafka::LIBRDKAFKA_VERSION}",
}

Note

1. this requires broker version 2.4.0 or later (metrics added in 2.5.0)
   • if rdkafka can not detect broker version, we may add one more option to Rdkafka::Config.new, so users can opt-in
2. These configuration properties are hidden (from CONFIGURATION.md et.al.) as they should typically not be modified by the user.