David Handermann created NIFI-12115:
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Summary: Add ListenOTLP Processor for Collecting OpenTelemetry
Key: NIFI-12115
URL: https://issues.apache.org/jira/browse/NIFI-12115
Project: Apache NiFi
Issue Type: New Feature
Components: Extensions
Reporter: David Handermann
Assignee: David Handermann
Fix For: 1.latest, 2.latest
The OpenTelemetry framework provides a common set of standards for collecting
and transmitting observability information including logs, metrics, and traces.
The [OLTP Specification 1.0.0|https://opentelemetry.io/docs/specs/otlp/]
defines protocol definitions for sending and receiving telemetry information
over gRPC and HTTP.
A new Processor should be implemented to support collecting OpenTelemetry. The
Processor should support both OLTP/gRPC and OLTP/HTTP transmission. Support for
OLTP/HTTP should include content type detection and handling for either
Protobuf or JSON encoding to enable collection from a wide variety of sources.
The OLTP Specification describes standard REST resource paths for telemetry
requests types that the Processor should accept. The Processor should also
support HTTPS transmission with a configurable Client Authentication policy to
enable mutual TLS when necessary.
Similar to other listening Processors, the ListenOTLP Processor should support
output batching that preserves the original format of Export Service Requests,
but merges arrays of resources with shared types. The initial version should
write output in JSON, following the OLTP Specification, with internal
conversion from Protobuf.
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