Carbon2 output data format

The carbon2 output data format (serializer) translates the Telegraf metric format to the Carbon2 format.


  ## Files to write to, "stdout" is a specially handled file.
  files = ["stdout", "/tmp/metrics.out"]

  ## Data format to output.
  ## Each data format has its own unique set of configuration options, read
  ## more about them here:
  data_format = "carbon2"

Standard form:

metric=name field=field_1 host=foo  30 1234567890
metric=name field=field_2 host=foo  4 1234567890
metric=name field=field_N host=foo  59 1234567890


The serializer converts the metrics by creating intrinsic_tags using the combination of metric name and fields. So, if one Telegraf metric has 4 fields, the carbon2 output will be 4 separate metrics. There will be a metric tag that represents the name of the metric and a field tag to represent the field.


If we take the following InfluxDB Line Protocol:

weather,location=us-midwest,season=summer temperature=82,wind=100 1234567890

After serializing in Carbon2, the result would be:

metric=weather field=temperature location=us-midwest season=summer  82 1234567890
metric=weather field=wind location=us-midwest season=summer  100 1234567890

Fields and tags with spaces

When a field key or tag key/value have spaces, spaces will be replaced with _.

Tags with empty values

When a tag’s value is empty, it will be replaced with null.

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