thanos-io/thanos v0.40.0 Release Notes

Published at: 2025-10-27T11:24:31Z

v0.40.0 - 2025 10 27

#8334 Query: wait for initial endpoint discovery before becoming ready
#8486 Receive: fix exemplar label corruption from Cap’n Proto memory references
#8499 Query: support UTF-8 label names for the /api/v1/label/:name/values API.
#8336 store: fix race between lazy index header creation

#8366 Store: optionally ignore Parquet migrated blocks
#8359 Tools: add --shipper.upload-compacted flag for uploading compacted blocks to bucket upload-blocks
#8484 Query: add /api/v1/status/tsdb API endpoint.
#8454 Compact: ensure we don’t mark blocks for deletion again after just deleting them
#8410 Compact: ignore blocks with deletion mark in partial deletes

#8370 Query: announced labelset now reflects relabel-config
#8464 Query: assume that we do not unmark a block for deletion. This solves a race between Thanos Store and Compactor.
#8402 Query/Receive: trim labelsets in String()
#8334 Query: wait for initial endpoint discovery before becoming ready
#8401 block/compact: rework consistency check, make writers only write
#8389 block: bust cache if modified timestamp differs

@paul-hsieh made their first contribution in https://github.com/thanos-io/thanos/pull/8321
@jdgeisler made their first contribution in https://github.com/thanos-io/thanos/pull/8359
@NickGoog made their first contribution in https://github.com/thanos-io/thanos/pull/8400
@erikgb made their first contribution in https://github.com/thanos-io/thanos/pull/8427
@parthivrmenon made their first contribution in https://github.com/thanos-io/thanos/pull/8456
@dbuchanaRH made their first contribution in https://github.com/thanos-io/thanos/pull/8486

Full Changelog: https://github.com/thanos-io/thanos/compare/v0.39.2...v0.40.0