outlierdetection: add metrics specified in gRFC A91 - #8644

Merged

arjan-bal merged 12 commits into

grpc:masterfrom

davinci26:XDSClientMetrics

Oct 21, 2025

davinci26 commented Oct 13, 2025 •

edited by easwars

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Implements gRFC A91: https://github.com/grpc/proposal/blob/master/A91-outlier-detection-metrics.md

Notable implementation detals

grpc.lb.backend_service is not implemented yet (marked as optional in the gRFC)
modifies the tests to make sure we can cover all the cases for enforced/unenforced without repeating the test setup.

RELEASE NOTES:

outlierdetection: add metrics for enforced (grpc.lb.outlier_detection.ejections_enforced) and unenforced (grpc.lb.outlier_detection.ejections_unenforced) outlier ejections.

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Labels

Area: Observability Type: Feature