- Removed the experimental gRPC API v2, breaking the APIv2 endpoint.
- Added UI and metrics enhancements: TSDB head stats section, collapse‑all button, alert toggle clarification, and new rule‑group and replay duration metrics.
- Fixed several bugs including scrape timestamp alignment, Eureka discovery on 32‑bit, regex case‑insensitive handling, classic UI query mode issues, and promtool alert restoration.
2.22.0 / 2020-10-15
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Deprecate non‑true/all values for the stats query parameter on /api/v1/query and /api/v1/query_range, now returning a warning and slated for removal in the next major release.
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