jolokia-kafka.conf

[[inputs.jolokia2_agent]]
  ## Collect the Kafka broker version.
  [[inputs.jolokia2_agent.metric]]
    name = "server"
    mbean = "kafka.server:type=app-info"
    paths = ["version"]

[[processors.regex]]
  order = 1
  namepass = ["kafka.server"]
  [[processors.regex.fields]]
    key = "version"
    pattern = "^(?P<majorminor>[0-9]+\\.[0-9]+).*"
    replacement = "${majorminor}"

[[processors.converter]]
  order = 2
  namepass = ["kafka.server"]
  [processors.converter.fields]
    float = ["version"]