NGINX Variables for Request and Response Header Modifiers

nginxinc / nginx-gateway-fabric

NGINX Gateway Fabric provides an implementation for the Gateway API using NGINX as the data plane.

Apache License 2.0

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NGINX Variables for Request and Response Header Modifiers #2041

Open mpstefan opened 1 month ago

mpstefan commented 1 month ago

### Tasks
- [ ] Design for Allowed NGINX Variables in Request and Response Headers
- [ ] #2040 
- [ ] Allow set of NGINX Variables for ResponseHeaderModifier
- [ ] Allow set of NGINX Variables for OpenTelemetry Attribute

sjberman commented 3 weeks ago

@mpstefan Since this also includes Otel attributes, I would simplify the title of this epic (since that's not related to header filters).

I also suspect this could be something that gets bumped up in priority. Being able to include variables offers a lot of value in gathering or adding data to requests that could be very useful for debugging issues or just for general information.