Lowercase string processor

The lowercase string processor converts a string to lowercase.

Configuration

You can configure the lowercase string processor with the following options.

Usage

To get started, create the following pipeline.yaml file:

pipeline:
  source:
    file:
      path: "/full/path/to/logs_json.log"
      record_type: "event"
      format: "json"
  processor:
    - lowercase_string:
        with_keys:
          - "lowercaseField"
  sink:
    - stdout:

Next, create a log file named logs_json.log. After that, replace the path in the file source of your pipeline.yaml file with the correct file path. For more detailed information, see Configuring OpenSearch Data Prepper.

Before you run Data Prepper, the source appears in the following format:

{"lowercaseField": "TESTmeSSage"}

After you run Data Prepper, the source is converted to the following format:

{"lowercaseField": "testmessage"}