feat: collect and serve pre-agg bytes and count

* pre-aggregate bytes and count per stream in the pattern ingester
* serve bytes_over_time and count_over_time queries from the patterns
  endpoint

Author: trevorwhitney

cmd/loki/loki-local-config.yaml

@@ -33,6 +33,9 @@ schema_config:
         prefix: index_
         period: 24h
 
+pattern_ingester:
+  enabled: true
+
 ruler:
   alertmanager_url: http://localhost:9093
 

pkg/logproto/extensions.go

@@ -161,7 +161,8 @@ func (r *QueryPatternsResponse) UnmarshalJSON(data []byte) error {
 	var v struct {
 		Status string `json:"status"`
 		Data   []struct {
-			Pattern string    `json:"pattern"`
+			Pattern string    `json:"pattern,omitempty"`
+			Labels  string    `json:"labels,omitempty"`
 			Samples [][]int64 `json:"samples"`
 		} `json:"data"`
 	}
@@ -174,7 +175,12 @@ func (r *QueryPatternsResponse) UnmarshalJSON(data []byte) error {
 		for _, s := range d.Samples {
 			samples = append(samples, &PatternSample{Timestamp: model.TimeFromUnix(s[0]), Value: s[1]})
 		}
-		r.Series = append(r.Series, &PatternSeries{Pattern: d.Pattern, Samples: samples})
+
+		if pattern := d.Pattern; pattern != "" {
+			r.Series = append(r.Series, NewPatternSeriesWithPattern(pattern, samples))
+		} else if labels := d.Labels; labels != "" {
+			r.Series = append(r.Series, NewPatternSeriesWithLabels(labels, samples))
+		}
 	}
 	return nil
 }
@@ -188,3 +194,11 @@ func (m *ShardsResponse) Merge(other *ShardsResponse) {
 	m.ChunkGroups = append(m.ChunkGroups, other.ChunkGroups...)
 	m.Statistics.Merge(other.Statistics)
 }
+
+func NewPatternSeriesWithPattern(pattern string, samples []*PatternSample) *PatternSeries {
+	return &PatternSeries{Identifier: &PatternSeries_Pattern{pattern}, Samples: samples}
+}
+
+func NewPatternSeriesWithLabels(labels string, samples []*PatternSample) *PatternSeries {
+	return &PatternSeries{Identifier: &PatternSeries_Labels{labels}, Samples: samples}
+}

pkg/logproto/extensions_test.go

@@ -3,6 +3,7 @@ package logproto
 import (
 	"testing"
 
+	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 )
 
@@ -40,3 +41,71 @@ func TestShard_SpaceFor(t *testing.T) {
 		})
 	}
 }
+
+func TestQueryPatternsResponse_UnmarshalJSON(t *testing.T) {
+	t.Run("unmarshals patterns", func(t *testing.T) {
+		mockData := []byte(`{
+		"status": "success",
+		"data": [
+			{
+				"pattern": "foo <*> bar",
+				"samples": [[1609459200, 10], [1609545600, 15]]
+			},
+			{
+				"pattern": "foo <*> buzz",
+				"samples": [[1609459200, 20], [1609545600, 25]]
+			}
+		]
+	}`)
+
+		expectedSeries := []*PatternSeries{
+			NewPatternSeriesWithPattern("foo <*> bar", []*PatternSample{
+				{Timestamp: model.TimeFromUnix(1609459200), Value: 10},
+				{Timestamp: model.TimeFromUnix(1609545600), Value: 15},
+			}),
+			NewPatternSeriesWithPattern("foo <*> buzz", []*PatternSample{
+				{Timestamp: model.TimeFromUnix(1609459200), Value: 20},
+				{Timestamp: model.TimeFromUnix(1609545600), Value: 25},
+			}),
+		}
+
+		r := &QueryPatternsResponse{}
+		err := r.UnmarshalJSON(mockData)
+
+		require.Nil(t, err)
+		require.Equal(t, expectedSeries, r.Series)
+	})
+
+	t.Run("unmarshals labels", func(t *testing.T) {
+		mockData := []byte(`{
+		"status": "success",
+		"data": [
+			{
+				"labels": "{foo=\"bar\"}",
+				"samples": [[1609459200, 10], [1609545600, 15]]
+			},
+			{
+				"labels": "{foo=\"buzz\"}",
+				"samples": [[1609459200, 20], [1609545600, 25]]
+			}
+		]
+	}`)
+
+		expectedSeries := []*PatternSeries{
+			NewPatternSeriesWithLabels(`{foo="bar"}`, []*PatternSample{
+				{Timestamp: model.TimeFromUnix(1609459200), Value: 10},
+				{Timestamp: model.TimeFromUnix(1609545600), Value: 15},
+			}),
+			NewPatternSeriesWithLabels(`{foo="buzz"}`, []*PatternSample{
+				{Timestamp: model.TimeFromUnix(1609459200), Value: 20},
+				{Timestamp: model.TimeFromUnix(1609545600), Value: 25},
+			}),
+		}
+
+		r := &QueryPatternsResponse{}
+		err := r.UnmarshalJSON(mockData)
+
+		require.Nil(t, err)
+		require.Equal(t, expectedSeries, r.Series)
+	})
+}