otel-ottl

Redact sensitive headers in OpenTelemetry traces by authoring OTTL statements inside the transform processor. Use `where` clauses with `nil` checks to safely drop or hash authorization and cookie attributes, preventing optional-field errors during telemetry transformation.

Conditionally drop spans or logs in an OpenTelemetry Collector by writing OTTL filter expressions. Apply correct OTTL contexts and operators to evaluate telemetry data and selectively remove unwanted records across traces, metrics, and logs.

OTTL works for routing OpenTelemetry telemetry by applying expressions to route data based on attributes within the Collector pipeline. It uses Collector-compatible connector structures to direct traces, metrics, and logs to appropriate destinations conditionally.

Control metric cardinality in OpenTelemetry pipelines by using OTTL to delete high-cardinality attributes. Author transform expressions that target and remove specific telemetry attributes, normalizing metrics data before it reaches downstream storage.

Avoid nil attribute errors in OpenTelemetry transform expressions by leveraging `where` clauses with `nil` checks. This OTTL pattern ensures optional fields are validated before redaction, enrichment, or conditional dropping operations execute.

The OpenTelemetry Collector supports telemetry transformation for logs and metrics via OTTL. Apply expressions across traces, metrics, and logs to perform enrichment, normalization, and privacy-safe redaction within the pipeline.