forked from grafana/loki
/
store.go
186 lines (159 loc) · 4.95 KB
/
store.go
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package tsdb
import (
"context"
"fmt"
"math"
"sync"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/labels"
"github.com/grafana/loki/pkg/storage/chunk"
"github.com/grafana/loki/pkg/storage/chunk/client"
"github.com/grafana/loki/pkg/storage/chunk/fetcher"
"github.com/grafana/loki/pkg/storage/config"
"github.com/grafana/loki/pkg/storage/stores/index"
"github.com/grafana/loki/pkg/storage/stores/indexshipper"
"github.com/grafana/loki/pkg/storage/stores/indexshipper/downloads"
tsdb_index "github.com/grafana/loki/pkg/storage/stores/tsdb/index"
)
type IndexWriter interface {
Append(userID string, ls labels.Labels, fprint uint64, chks tsdb_index.ChunkMetas) error
}
type store struct {
index.Reader
indexShipper indexshipper.IndexShipper
indexWriter IndexWriter
backupIndexWriter index.Writer
logger log.Logger
stopOnce sync.Once
}
// NewStore creates a new tsdb index ReaderWriter.
func NewStore(
name string,
indexShipperCfg indexshipper.Config,
schemaCfg config.SchemaConfig,
_ *fetcher.Fetcher,
objectClient client.ObjectClient,
limits downloads.Limits,
tableRange config.TableRange,
backupIndexWriter index.Writer,
reg prometheus.Registerer,
logger log.Logger,
) (
index.ReaderWriter,
func(),
error,
) {
if backupIndexWriter == nil {
backupIndexWriter = noopBackupIndexWriter{}
}
storeInstance := &store{
backupIndexWriter: backupIndexWriter,
logger: logger,
}
if err := storeInstance.init(name, indexShipperCfg, schemaCfg, objectClient, limits, tableRange, reg); err != nil {
return nil, nil, err
}
return storeInstance, storeInstance.Stop, nil
}
func (s *store) init(name string, indexShipperCfg indexshipper.Config, schemaCfg config.SchemaConfig, objectClient client.ObjectClient,
limits downloads.Limits, tableRange config.TableRange, reg prometheus.Registerer) error {
var err error
s.indexShipper, err = indexshipper.NewIndexShipper(
indexShipperCfg,
objectClient,
limits,
nil,
OpenShippableTSDB,
tableRange,
prometheus.WrapRegistererWithPrefix("loki_tsdb_shipper_", reg),
s.logger,
)
if err != nil {
return err
}
var indices []Index
opts := DefaultIndexClientOptions()
if indexShipperCfg.Mode == indexshipper.ModeWriteOnly {
// We disable bloom filters on write nodes
// for the Stats() methods as it's of relatively little
// benefit when compared to the memory cost. The bloom filters
// help detect duplicates with some probability, but this
// is only relevant across index bucket boundaries
// & pre-compacted indices (replication, not valid on a single ingester).
opts.UseBloomFilters = false
}
if indexShipperCfg.Mode != indexshipper.ModeReadOnly {
nodeName, err := indexShipperCfg.GetUniqueUploaderName()
if err != nil {
return err
}
tsdbMetrics := NewMetrics(reg)
tsdbManager := NewTSDBManager(
name,
nodeName,
indexShipperCfg.ActiveIndexDirectory,
s.indexShipper,
tableRange,
schemaCfg,
s.logger,
tsdbMetrics,
)
headManager := NewHeadManager(
name,
s.logger,
indexShipperCfg.ActiveIndexDirectory,
tsdbMetrics,
tsdbManager,
)
if err := headManager.Start(); err != nil {
return err
}
s.indexWriter = headManager
indices = append(indices, headManager)
} else {
s.indexWriter = failingIndexWriter{}
}
indices = append(indices, newIndexShipperQuerier(s.indexShipper, tableRange))
multiIndex := NewMultiIndex(IndexSlice(indices))
s.Reader = NewIndexClient(multiIndex, opts)
return nil
}
func (s *store) Stop() {
s.stopOnce.Do(func() {
if hm, ok := s.indexWriter.(*HeadManager); ok {
if err := hm.Stop(); err != nil {
level.Error(s.logger).Log("msg", "failed to stop head manager", "err", err)
}
}
s.indexShipper.Stop()
})
}
func (s *store) IndexChunk(ctx context.Context, from model.Time, through model.Time, chk chunk.Chunk) error {
// Always write the index to benefit durability via replication factor.
approxKB := math.Round(float64(chk.Data.UncompressedSize()) / float64(1<<10))
metas := tsdb_index.ChunkMetas{
{
Checksum: chk.ChunkRef.Checksum,
MinTime: int64(chk.ChunkRef.From),
MaxTime: int64(chk.ChunkRef.Through),
KB: uint32(approxKB),
Entries: uint32(chk.Data.Entries()),
},
}
if err := s.indexWriter.Append(chk.UserID, chk.Metric, chk.ChunkRef.Fingerprint, metas); err != nil {
return errors.Wrap(err, "writing index entry")
}
return s.backupIndexWriter.IndexChunk(ctx, from, through, chk)
}
type failingIndexWriter struct{}
func (f failingIndexWriter) Append(_ string, _ labels.Labels, _ uint64, _ tsdb_index.ChunkMetas) error {
return fmt.Errorf("index writer is not initialized due to tsdb store being initialized in read-only mode")
}
type noopBackupIndexWriter struct{}
func (n noopBackupIndexWriter) IndexChunk(_ context.Context, _, _ model.Time, _ chunk.Chunk) error {
return nil
}