Avro input data format

[[inputs.kafka_consumer]]
  ## Kafka brokers.
  brokers = ["localhost:9092"]

  ## Topics to consume.
  topics = ["telegraf"]

  ## Maximum length of a message to consume, in bytes (default 0/unlimited);
  ## larger messages are dropped
  max_message_len = 1000000

  ## Avro data format settings
  data_format = "avro"

  ## Avro message format
  ## Supported values are "binary" (default) and "json"
  # avro_format = "binary"

  ## Url of the schema registry; exactly one of schema registry and
  ## schema must be set
  avro_schema_registry = "http://localhost:8081"

  ## Path to the schema registry certificate. Should be specified only if
  ## required for connection to the schema registry.
  # avro_schema_registry_cert = "/etc/telegraf/ca_cert.crt"

  ## Schema string; exactly one of schema registry and schema must be set
  #avro_schema = '''
  #        {
  #          "type":"record",
  #          "name":"Value",
  #          "namespace":"com.example",
  #          "fields":[
  #              {
  #                  "name":"tag",
  #                  "type":"string"
  #              },
  #              {
  #                  "name":"field",
  #                  "type":"long"
  #              },
  #              {
  #                  "name":"timestamp",
  #                  "type":"long"
  #              }
  #          ]
  #      }
  #'''

  ## Measurement string; if not set, determine measurement name from
  ## schema (as "<namespace>.<name>")
  # avro_measurement = "ratings"

  ## Measurement field name; the measurement name will be taken
  ## from this field. If not set, determine measurement name
  ## from the 'avro_measurement' option
  # avro_measurement_field = "field_name"

  ## Avro fields to be used as tags; optional.
  # avro_tags = ["CHANNEL", "CLUB_STATUS"]

  ## Avro fields to be used as fields; if empty, any Avro fields
  ## detected from the schema, not used as tags, will be used as
  ## measurement fields.
  # avro_fields = ["STARS"]

  ## Avro fields to be used as timestamp; if empty, current time will
  ## be used for the measurement timestamp.
  # avro_timestamp = ""
  ## If avro_timestamp is specified, avro_timestamp_format must be set
  ## to one of 'unix', 'unix_ms', 'unix_us', or 'unix_ns'
  # avro_timestamp_format = "unix"

  ## Used to separate parts of array structures.  As above, the default
  ## is the empty string, so a=["a", "b"] becomes a0="a", a1="b".
  ## If this were set to "_", then it would be a_0="a", a_1="b".
  # avro_field_separator = "_"

  ## Define handling of union types. Possible values are:
  ##   flatten  -- add type suffix to field name (default)
  ##   nullable -- do not modify field name but discard "null" field values
  ##   any      -- do not modify field name and set field value to the received type
  # avro_union_mode = "flatten"

  ## Default values for given tags: optional
  # tags = { "application": "hermes", "region": "central" }