- Added new Service Discovery UI and Admin APIs (delete, snapshot, tombstones) plus UI enhancements like graph autocomplete and faster federation.
- Bumped storage index version, making storage backward‑compatible only from 2.0 to 2.1 and removed the 4 GiB size limit, introducing a breaking change.
- Fixed numerous bugs: remote‑read default, Alertmanager config handling, matcher selection, TSDB panics, Windows/NFS retention issues, compaction retries, and WAL shutdown.
2.1.0 / 2018-01-19
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