calculating hash on TSDB Series() request as well

Signed-off-by: Pedro Tanaka <pedro.tanaka@legal.one>

pkg/store/tsdb.go

@@ -197,6 +197,7 @@ func (s *TSDBStore) Series(r *storepb.SeriesRequest, srv storepb.Store_SeriesSer
 				Raw: &storepb.Chunk{
 					Type: storepb.Chunk_Encoding(chk.Chunk.Encoding() - 1), // Proto chunk encoding is one off to TSDB one.
 					Data: chk.Chunk.Bytes(),
+					Hash: hashChunk(chk.Chunk.Bytes(), r.CalculateChunkChecksums),
 				},
 			}
 			frameBytesLeft -= c.Size()

pkg/store/tsdb_test.go

@@ -6,6 +6,7 @@ package store
 import (
 	"context"
 	"fmt"
+	"github.com/cespare/xxhash"
 	"io"
 	"math"
 	"math/rand"
@@ -61,6 +62,61 @@ func TestTSDBStore_Info(t *testing.T) {
 	testutil.Equals(t, int64(math.MaxInt64), resp.MaxTime)
 }
 
+func TestTSDBStore_Series_ChunkChecksum(t *testing.T) {
+	defer testutil.TolerantVerifyLeak(t)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	db, err := e2eutil.NewTSDB()
+	defer func() { testutil.Ok(t, db.Close()) }()
+	testutil.Ok(t, err)
+
+	tsdbStore := NewTSDBStore(nil, db, component.Rule, labels.FromStrings("region", "eu-west"))
+
+	appender := db.Appender(context.Background())
+
+	for i := 1; i <= 3; i++ {
+		_, err = appender.Append(0, labels.FromStrings("a", "1"), int64(i), float64(i))
+		testutil.Ok(t, err)
+	}
+	err = appender.Commit()
+	testutil.Ok(t, err)
+
+	srv := newStoreSeriesServer(ctx)
+
+	req := &storepb.SeriesRequest{
+		MinTime: 1,
+		MaxTime: 3,
+		Matchers: []storepb.LabelMatcher{
+			{Type: storepb.LabelMatcher_EQ, Name: "a", Value: "1"},
+		},
+	}
+	err = tsdbStore.Series(req, srv)
+	testutil.Ok(t, err)
+
+	for _, chk := range srv.SeriesSet[0].Chunks {
+		testutil.Equals(t, uint64(0), chk.Raw.Hash)
+	}
+
+	req = &storepb.SeriesRequest{
+		MinTime: 1,
+		MaxTime: 3,
+		Matchers: []storepb.LabelMatcher{
+			{Type: storepb.LabelMatcher_EQ, Name: "a", Value: "1"},
+		},
+		CalculateChunkChecksums: true,
+	}
+
+	err = tsdbStore.Series(req, srv)
+	testutil.Ok(t, err)
+
+	for _, chk := range srv.SeriesSet[1].Chunks {
+		want := xxhash.Sum64(chk.Raw.Data)
+		testutil.Equals(t, want, chk.Raw.Hash)
+	}
+}
+
 func TestTSDBStore_Series(t *testing.T) {
 	defer testutil.TolerantVerifyLeak(t)