Fix mint and maxt for api/v1/series call (thanos-io#5966)

* Fix mint and maxt for api/v1/series call

The storage querier currently uses select hints to set the start
and end time of the series select rpc. The same rpc is also used
for the api/v1/series API which does not produce any hints.

This commit changes the querier to use the mint and maxt from the
query itself when selecting series from stores.

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>

* Add CHANGELOG entry

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>

CHANGELOG.md

@@ -15,7 +15,8 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#5854](https://github.com/thanos-io/thanos/pull/5854) Query Frontend: Handles `lookback_delta` param in query frontend.
 - [#5230](https://github.com/thanos-io/thanos/pull/5230) Rule: Stateless ruler support restoring `for` state from query API servers. The query API servers should be able to access the remote write storage.
 - [#5880](https://github.com/thanos-io/thanos/pull/5880) Query Frontend: Fixes some edge cases of query sharding analysis.
-- [#5893](https://github.com/thanos-io/thanos/pull/5893) Cache: fixed redis client not respecting `SetMultiBatchSize` config value.
+- [#5893](https://github.com/thanos-io/thanos/pull/5893) Cache: Fixed redis client not respecting `SetMultiBatchSize` config value.
+- [#5966](https://github.com/thanos-io/thanos/pull/5966) Query: Fixed mint and maxt when selecting series for the `api/v1/series` HTTP endpoint.
 
 ### Added
 

pkg/query/querier.go

@@ -349,8 +349,8 @@ func (q *querier) selectFn(ctx context.Context, hints *storage.SelectHints, ms .
 	}
 
 	if err := q.proxy.Series(&storepb.SeriesRequest{
-		MinTime:                 hints.Start,
-		MaxTime:                 hints.End,
+		MinTime:                 q.mint,
+		MaxTime:                 q.maxt,
 		Matchers:                sms,
 		MaxResolutionWindow:     q.maxResolutionMillis,
 		Aggregates:              aggrs,