[processor/resourcedetection] add feature gate to prefix Consul meta attributes

[paulojmdias]

Description

Adds the alpha feature gate processor.resourcedetection.consul.prefixMetaAttributes. When enabled, the Consul detector emits allowlisted node_meta keys as consul.meta.<key> instead of verbatim, matching other detectors like ec2.tag., azure.tag., and openstack.nova.meta..

Disabled by default, so existing attribute names are unchanged.

Link to tracking issue

Fixes #49988

Testing

Added TestDetectPrefixedMetaAttributes for the gate-on path.

Documentation

Gate documented in the README Consul section and in the generated internal/consul/documentation.md.

Authorship

• I, a human, wrote this pull request description myself.

[opentelemetry-pr-dashboard]

Pull request dashboard status

Merged · refreshed 2026-08-04 22:32 UTC

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[Copilot]

Pull request overview

Adds an alpha feature gate to the Consul resource detector so allowlisted node_meta attributes can be emitted under a Consul-owned namespace (consul.meta.<key>) while preserving the current unprefixed behavior by default.

Changes:

• Introduces processor.resourcedetection.consul.prefixMetaAttributes (alpha, default off) and wires it into the Consul detector’s metadata emission path.
• Adds unit coverage for the gate-enabled behavior and documents the gate in the resourcedetectionprocessor README + generated detector docs.
• Updates module dependencies and includes a changelog entry for the user-facing change.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
processor/resourcedetectionprocessor/README.md	Documents the new feature gate and its effect on Consul node meta attribute naming.
processor/resourcedetectionprocessor/internal/consul/metadata.yaml	Declares the feature gate for mdatagen, including description, version, and issue reference.
processor/resourcedetectionprocessor/internal/consul/internal/metadata/generated_feature_gates.go	Generated registration of the new feature gate in the global registry.
processor/resourcedetectionprocessor/internal/consul/documentation.md	Generated documentation updated to include the feature gate table entry.
processor/resourcedetectionprocessor/internal/consul/consul.go	Applies the optional consul.meta. prefix when the feature gate is enabled.
processor/resourcedetectionprocessor/internal/consul/consul_test.go	Adds a test for the prefixed behavior and a helper to toggle the gate during tests.
processor/resourcedetectionprocessor/go.mod	Promotes go.opentelemetry.io/collector/featuregate to a direct dependency (now imported in tests/generated code).
.chloggen/49988-consul-prefix-meta-attributes.yaml	Adds a changelog entry describing the new alpha gate and its default-off behavior.

Files not reviewed (1)

• processor/resourcedetectionprocessor/internal/consul/internal/metadata/generated_feature_gates.go: Generated file

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