labels stage

The labels stage is an action stage that takes data from the extracted map and modifies the label set that is sent to Loki with the log entry.


  # Key is REQUIRED and the name for the label that will be created.
  # Value is optional and will be the name from extracted data whose value
  # will be used for the value of the label. If empty, the value will be
  # inferred to be the same as the key.
  [ <string>: [<string>] ... ]


For the given pipeline:

- json:
      stream: stream
- labels:

Given the following log line:

{"log":"log message\n","stream":"stderr","time":"2019-04-30T02:12:41.8443515Z"}

The first stage would extract stream into the extracted map with a value of stderr. The labels stage would turn that key-value pair into a label, so the log line sent to Loki would include the label stream with a value of stderr.