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distributor_test.go
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package distributor
import (
"context"
"fmt"
"math"
"math/rand"
"net/http"
"strconv"
"strings"
"sync"
"testing"
"time"
"github.com/go-kit/log"
"github.com/grafana/dskit/flagext"
"github.com/grafana/dskit/httpgrpc"
"github.com/grafana/dskit/kv"
"github.com/grafana/dskit/kv/consul"
"github.com/grafana/dskit/ring"
ring_client "github.com/grafana/dskit/ring/client"
"github.com/grafana/dskit/services"
"github.com/grafana/dskit/user"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/model/labels"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/twmb/franz-go/pkg/kgo"
"go.opentelemetry.io/collector/pdata/plog"
"google.golang.org/grpc"
"google.golang.org/grpc/health/grpc_health_v1"
"github.com/grafana/loki/pkg/push"
"github.com/grafana/loki/v3/pkg/ingester"
"github.com/grafana/loki/v3/pkg/ingester/client"
loghttp_push "github.com/grafana/loki/v3/pkg/loghttp/push"
"github.com/grafana/loki/v3/pkg/logproto"
"github.com/grafana/loki/v3/pkg/logql/syntax"
"github.com/grafana/loki/v3/pkg/runtime"
"github.com/grafana/loki/v3/pkg/util/constants"
fe "github.com/grafana/loki/v3/pkg/util/flagext"
loki_flagext "github.com/grafana/loki/v3/pkg/util/flagext"
util_log "github.com/grafana/loki/v3/pkg/util/log"
loki_net "github.com/grafana/loki/v3/pkg/util/net"
"github.com/grafana/loki/v3/pkg/util/test"
"github.com/grafana/loki/v3/pkg/validation"
)
var (
success = &logproto.PushResponse{}
ctx = user.InjectOrgID(context.Background(), "test")
)
func TestDistributor(t *testing.T) {
ingestionRateLimit := 0.000096 // 100 Bytes/s limit
for i, tc := range []struct {
lines int
maxLineSize uint64
streams int
mangleLabels int
expectedResponse *logproto.PushResponse
expectedErrors []error
}{
{
lines: 10,
streams: 1,
expectedResponse: success,
},
{
lines: 100,
streams: 1,
expectedErrors: []error{httpgrpc.Errorf(http.StatusTooManyRequests, validation.RateLimitedErrorMsg, "test", 100, 100, 1000)},
},
{
lines: 100,
streams: 1,
maxLineSize: 1,
expectedResponse: success,
expectedErrors: []error{httpgrpc.Errorf(http.StatusBadRequest, "100 errors like: %s", fmt.Sprintf(validation.LineTooLongErrorMsg, 1, "{foo=\"bar\"}", 10))},
},
{
lines: 100,
streams: 1,
mangleLabels: 1,
expectedResponse: success,
expectedErrors: []error{httpgrpc.Errorf(http.StatusBadRequest, validation.InvalidLabelsErrorMsg, "{ab\"", "1:4: parse error: unterminated quoted string")},
},
{
lines: 10,
streams: 2,
mangleLabels: 1,
maxLineSize: 1,
expectedResponse: success,
expectedErrors: []error{
httpgrpc.Errorf(http.StatusBadRequest, ""),
fmt.Errorf("1 errors like: %s", fmt.Sprintf(validation.InvalidLabelsErrorMsg, "{ab\"", "1:4: parse error: unterminated quoted string")),
fmt.Errorf("10 errors like: %s", fmt.Sprintf(validation.LineTooLongErrorMsg, 1, "{foo=\"bar\"}", 10)),
},
},
} {
t.Run(fmt.Sprintf("[%d](lines=%v)", i, tc.lines), func(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.IngestionRateMB = ingestionRateLimit
limits.IngestionBurstSizeMB = ingestionRateLimit
limits.MaxLineSize = fe.ByteSize(tc.maxLineSize)
distributors, _ := prepare(t, 1, 5, limits, nil)
var request logproto.PushRequest
for i := 0; i < tc.streams; i++ {
req := makeWriteRequest(tc.lines, 10)
request.Streams = append(request.Streams, req.Streams[0])
}
for i := 0; i < tc.mangleLabels; i++ {
request.Streams[i].Labels = `{ab"`
}
response, err := distributors[i%len(distributors)].Push(ctx, &request)
assert.Equal(t, tc.expectedResponse, response)
if len(tc.expectedErrors) > 0 {
for _, expectedError := range tc.expectedErrors {
if len(tc.expectedErrors) == 1 {
assert.Equal(t, expectedError, err)
} else {
assert.Contains(t, err.Error(), expectedError.Error())
}
}
} else {
assert.NoError(t, err)
}
})
}
}
func Test_IncrementTimestamp(t *testing.T) {
incrementingDisabled := &validation.Limits{}
flagext.DefaultValues(incrementingDisabled)
incrementingDisabled.RejectOldSamples = false
incrementingDisabled.DiscoverLogLevels = false
incrementingEnabled := &validation.Limits{}
flagext.DefaultValues(incrementingEnabled)
incrementingEnabled.RejectOldSamples = false
incrementingEnabled.IncrementDuplicateTimestamp = true
incrementingEnabled.DiscoverLogLevels = false
defaultLimits := &validation.Limits{}
flagext.DefaultValues(defaultLimits)
defaultLimits.DiscoverLogLevels = false
tests := map[string]struct {
limits *validation.Limits
push *logproto.PushRequest
expectedPush *logproto.PushRequest
}{
"incrementing disabled, no dupes": {
limits: incrementingDisabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123457, 0), Line: "heyiiiiiii"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123457, 0), Line: "heyiiiiiii"},
},
},
},
},
},
"incrementing disabled, with dupe timestamp different entry": {
limits: incrementingDisabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyiiiiiii"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyiiiiiii"},
},
},
},
},
},
"incrementing disabled, with dupe timestamp same entry": {
limits: incrementingDisabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
},
},
},
},
},
"incrementing enabled, no dupes": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123457, 0), Line: "heyiiiiiii"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123457, 0), Line: "heyiiiiiii"},
},
},
},
},
},
"incrementing enabled, with dupe timestamp different entry": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyiiiiiii"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 1), Line: "heyiiiiiii"},
},
},
},
},
},
"incrementing enabled, with dupe timestamp same entry": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
},
},
},
},
},
"incrementing enabled, multiple repeated-timestamps": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "hi"},
{Timestamp: time.Unix(123456, 0), Line: "hey there"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 1), Line: "hi"},
{Timestamp: time.Unix(123456, 2), Line: "hey there"},
},
},
},
},
},
"incrementing enabled, multiple subsequent increments": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 0), Line: "hi"},
{Timestamp: time.Unix(123456, 1), Line: "hey there"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "heyooooooo"},
{Timestamp: time.Unix(123456, 1), Line: "hi"},
{Timestamp: time.Unix(123456, 2), Line: "hey there"},
},
},
},
},
},
"incrementing enabled, no dupes, out of order": {
limits: incrementingEnabled,
push: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "hey1"},
{Timestamp: time.Unix(123458, 0), Line: "hey3"},
{Timestamp: time.Unix(123457, 0), Line: "hey2"},
},
},
},
},
expectedPush: &logproto.PushRequest{
Streams: []logproto.Stream{
{
Labels: "{job=\"foo\"}",
Hash: 0x8eeb87f5eb220480,
Entries: []logproto.Entry{
{Timestamp: time.Unix(123456, 0), Line: "hey1"},
{Timestamp: time.Unix(123458, 0), Line: "hey3"},
{Timestamp: time.Unix(123457, 0), Line: "hey2"},
},
},
},
},
},
}
for testName, testData := range tests {
t.Run(testName, func(t *testing.T) {
ing := &mockIngester{}
distributors, _ := prepare(t, 1, 3, testData.limits, func(_ string) (ring_client.PoolClient, error) { return ing, nil })
_, err := distributors[0].Push(ctx, testData.push)
assert.NoError(t, err)
topVal := ing.Peek()
assert.Equal(t, testData.expectedPush, topVal)
})
}
}
func TestDistributorPushConcurrently(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
distributors, ingesters := prepare(t, 1, 5, limits, nil)
numReq := 1
var wg sync.WaitGroup
for i := 0; i < numReq; i++ {
wg.Add(1)
go func(n int) {
defer wg.Done()
request := makeWriteRequestWithLabels(100, 100,
[]string{
fmt.Sprintf(`{app="foo-%d"}`, n),
fmt.Sprintf(`{instance="bar-%d"}`, n),
},
)
response, err := distributors[n%len(distributors)].Push(ctx, request)
assert.NoError(t, err)
assert.Equal(t, &logproto.PushResponse{}, response)
}(i)
}
wg.Wait()
// make sure the ingesters received the push requests
time.Sleep(10 * time.Millisecond)
counter := 0
labels := make(map[string]int)
for i := range ingesters {
ingesters[i].mu.Lock()
pushed := ingesters[i].pushed
counter = counter + len(pushed)
for _, pr := range pushed {
for _, st := range pr.Streams {
labels[st.Labels] = labels[st.Labels] + 1
}
}
ingesters[i].mu.Unlock()
}
assert.Equal(t, numReq*3, counter) // RF=3
// each stream is present 3 times
for i := 0; i < numReq; i++ {
l := fmt.Sprintf(`{instance="bar-%d"}`, i)
assert.Equal(t, 3, labels[l], "stream %s expected 3 times, got %d", l, labels[l])
l = fmt.Sprintf(`{app="foo-%d"}`, i)
assert.Equal(t, 3, labels[l], "stream %s expected 3 times, got %d", l, labels[l])
}
}
func TestDistributorPushErrors(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
t.Run("with RF=3 a single push can fail", func(t *testing.T) {
distributors, ingesters := prepare(t, 1, 3, limits, nil)
ingesters[0].failAfter = 5 * time.Millisecond
ingesters[1].succeedAfter = 10 * time.Millisecond
ingesters[2].succeedAfter = 15 * time.Millisecond
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
require.Eventually(t, func() bool {
return len(ingesters[1].pushed) == 1 && len(ingesters[2].pushed) == 1
}, time.Second, 10*time.Millisecond)
require.Equal(t, 0, len(ingesters[0].pushed))
})
t.Run("with RF=3 two push failures result in error", func(t *testing.T) {
distributors, ingesters := prepare(t, 1, 3, limits, nil)
ingesters[0].failAfter = 5 * time.Millisecond
ingesters[1].succeedAfter = 10 * time.Millisecond
ingesters[2].failAfter = 15 * time.Millisecond
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.Error(t, err)
require.Eventually(t, func() bool {
return len(ingesters[1].pushed) == 1
}, time.Second, 10*time.Millisecond)
require.Equal(t, 0, len(ingesters[0].pushed))
require.Equal(t, 0, len(ingesters[2].pushed))
})
}
func TestDistributorPushToKafka(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
t.Run("with kafka, any failure fails the request", func(t *testing.T) {
kafkaWriter := &mockKafkaWriter{
failOnWrite: true,
}
distributors, _ := prepare(t, 1, 0, limits, nil)
for _, d := range distributors {
d.cfg.KafkaEnabled = true
d.cfg.IngesterEnabled = false
d.cfg.KafkaConfig.ProducerMaxRecordSizeBytes = 1000
d.kafkaWriter = kafkaWriter
}
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.Error(t, err)
})
t.Run("with kafka, no failures is successful", func(t *testing.T) {
kafkaWriter := &mockKafkaWriter{
failOnWrite: false,
}
distributors, _ := prepare(t, 1, 0, limits, nil)
for _, d := range distributors {
d.cfg.KafkaEnabled = true
d.cfg.IngesterEnabled = false
d.cfg.KafkaConfig.ProducerMaxRecordSizeBytes = 1000
d.kafkaWriter = kafkaWriter
}
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
require.Equal(t, 1, kafkaWriter.pushed)
})
t.Run("with kafka and ingesters, both must complete", func(t *testing.T) {
kafkaWriter := &mockKafkaWriter{
failOnWrite: false,
}
distributors, ingesters := prepare(t, 1, 3, limits, nil)
ingesters[0].succeedAfter = 5 * time.Millisecond
ingesters[1].succeedAfter = 10 * time.Millisecond
ingesters[2].succeedAfter = 15 * time.Millisecond
for _, d := range distributors {
d.cfg.KafkaEnabled = true
d.cfg.IngesterEnabled = true
d.cfg.KafkaConfig.ProducerMaxRecordSizeBytes = 1000
d.kafkaWriter = kafkaWriter
}
request := makeWriteRequest(10, 64)
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
require.Equal(t, 1, kafkaWriter.pushed)
require.Equal(t, 1, len(ingesters[0].pushed))
require.Equal(t, 1, len(ingesters[1].pushed))
require.Eventually(t, func() bool {
return len(ingesters[2].pushed) == 1
}, time.Second, 10*time.Millisecond)
})
}
func Test_SortLabelsOnPush(t *testing.T) {
t.Run("with service_name already present in labels", func(t *testing.T) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
ingester := &mockIngester{}
distributors, _ := prepare(t, 1, 5, limits, func(_ string) (ring_client.PoolClient, error) { return ingester, nil })
request := makeWriteRequest(10, 10)
request.Streams[0].Labels = `{buzz="f", service_name="foo", a="b"}`
_, err := distributors[0].Push(ctx, request)
require.NoError(t, err)
topVal := ingester.Peek()
require.Equal(t, `{a="b", buzz="f", service_name="foo"}`, topVal.Streams[0].Labels)
})
}
func Test_TruncateLogLines(t *testing.T) {
setup := func() (*validation.Limits, *mockIngester) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.MaxLineSize = 5
limits.MaxLineSizeTruncate = true
return limits, &mockIngester{}
}
t.Run("it truncates lines to MaxLineSize when MaxLineSizeTruncate is true", func(t *testing.T) {
limits, ingester := setup()
distributors, _ := prepare(t, 1, 5, limits, func(_ string) (ring_client.PoolClient, error) { return ingester, nil })
_, err := distributors[0].Push(ctx, makeWriteRequest(1, 10))
require.NoError(t, err)
topVal := ingester.Peek()
require.Len(t, topVal.Streams[0].Entries[0].Line, 5)
})
}
func Test_DiscardEmptyStreamsAfterValidation(t *testing.T) {
setup := func() (*validation.Limits, *mockIngester) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.MaxLineSize = 5
return limits, &mockIngester{}
}
t.Run("it discards invalid entries and discards resulting empty streams completely", func(t *testing.T) {
limits, ingester := setup()
distributors, _ := prepare(t, 1, 5, limits, func(_ string) (ring_client.PoolClient, error) { return ingester, nil })
_, err := distributors[0].Push(ctx, makeWriteRequest(1, 10))
require.Equal(t, err, httpgrpc.Errorf(http.StatusBadRequest, "%s", fmt.Sprintf(validation.LineTooLongErrorMsg, 5, "{foo=\"bar\"}", 10)))
topVal := ingester.Peek()
require.Nil(t, topVal)
})
}
func TestStreamShard(t *testing.T) {
// setup base stream.
baseStream := logproto.Stream{}
baseLabels := "{app='myapp'}"
lbs, err := syntax.ParseLabels(baseLabels)
require.NoError(t, err)
baseStream.Hash = lbs.Hash()
baseStream.Labels = lbs.String()
totalEntries := generateEntries(100)
desiredRate := loki_flagext.ByteSize(300)
for _, tc := range []struct {
name string
entries []logproto.Entry
streamSize int
wantDerivedStreamSize int
}{
{
name: "zero shard because no entries",
entries: nil,
streamSize: 50,
wantDerivedStreamSize: 1,
},
{
name: "one shard with one entry",
streamSize: 1,
entries: totalEntries[0:1],
wantDerivedStreamSize: 1,
},
{
name: "two shards with 3 entries",
streamSize: desiredRate.Val() + 1, // pass the desired rate by 1 byte to force two shards.
entries: totalEntries[0:3],
wantDerivedStreamSize: 2,
},
{
name: "two shards with 5 entries",
entries: totalEntries[0:5],
streamSize: desiredRate.Val() + 1, // pass the desired rate for 1 byte to force two shards.
wantDerivedStreamSize: 2,
},
{
name: "one shard with 20 entries",
entries: totalEntries[0:20],
streamSize: 1,
wantDerivedStreamSize: 1,
},
{
name: "two shards with 20 entries",
entries: totalEntries[0:20],
streamSize: desiredRate.Val() + 1, // pass desired rate by 1 to force two shards.
wantDerivedStreamSize: 2,
},
{
name: "four shards with 20 entries",
entries: totalEntries[0:20],
streamSize: 1 + (desiredRate.Val() * 3), // force 4 shards.
wantDerivedStreamSize: 4,
},
{
name: "size for four shards with 2 entries, ends up with 4 shards ",
streamSize: 1 + (desiredRate.Val() * 3), // force 4 shards.
entries: totalEntries[0:2],
wantDerivedStreamSize: 2,
},
{
name: "four shards with 1 entry, ends up with 1 shard only",
entries: totalEntries[0:1],
wantDerivedStreamSize: 1,
},
} {
t.Run(tc.name, func(t *testing.T) {
baseStream.Entries = tc.entries
distributorLimits := &validation.Limits{}
flagext.DefaultValues(distributorLimits)
distributorLimits.ShardStreams.DesiredRate = desiredRate
overrides, err := validation.NewOverrides(*distributorLimits, nil)
require.NoError(t, err)
validator, err := NewValidator(overrides, nil)
require.NoError(t, err)
d := Distributor{
rateStore: &fakeRateStore{pushRate: 1},
validator: validator,
streamShardCount: prometheus.NewCounter(prometheus.CounterOpts{}),
shardTracker: NewShardTracker(),
}
derivedStreams := d.shardStream(baseStream, tc.streamSize, "fake")
require.Len(t, derivedStreams, tc.wantDerivedStreamSize)
for _, s := range derivedStreams {
// Generate sorted labels
lbls, err := syntax.ParseLabels(s.Stream.Labels)
require.NoError(t, err)
require.Equal(t, lbls.Hash(), s.Stream.Hash)
require.Equal(t, lbls.String(), s.Stream.Labels)
}
})
}
}
func TestStreamShardAcrossCalls(t *testing.T) {
// setup base stream.
baseStream := logproto.Stream{}
baseLabels := "{app='myapp'}"
lbs, err := syntax.ParseLabels(baseLabels)
require.NoError(t, err)
baseStream.Hash = lbs.Hash()
baseStream.Labels = lbs.String()
baseStream.Entries = generateEntries(2)
streamRate := loki_flagext.ByteSize(400).Val()
distributorLimits := &validation.Limits{}
flagext.DefaultValues(distributorLimits)
distributorLimits.ShardStreams.DesiredRate = loki_flagext.ByteSize(100)
overrides, err := validation.NewOverrides(*distributorLimits, nil)
require.NoError(t, err)
validator, err := NewValidator(overrides, nil)
require.NoError(t, err)
t.Run("it generates 4 shards across 2 calls when calculated shards = 2 * entries per call", func(t *testing.T) {
d := Distributor{
rateStore: &fakeRateStore{pushRate: 1},
validator: validator,
streamShardCount: prometheus.NewCounter(prometheus.CounterOpts{}),
shardTracker: NewShardTracker(),
}
derivedStreams := d.shardStream(baseStream, streamRate, "fake")
require.Len(t, derivedStreams, 2)
for i, s := range derivedStreams {
require.Len(t, s.Stream.Entries, 1)
lbls, err := syntax.ParseLabels(s.Stream.Labels)
require.NoError(t, err)
require.Equal(t, lbls[0].Value, fmt.Sprint(i))
}
derivedStreams = d.shardStream(baseStream, streamRate, "fake")
require.Len(t, derivedStreams, 2)
for i, s := range derivedStreams {
require.Len(t, s.Stream.Entries, 1)
lbls, err := syntax.ParseLabels(s.Stream.Labels)
require.NoError(t, err)
require.Equal(t, lbls[0].Value, fmt.Sprint(i+2))
}
})
}
func generateEntries(n int) []logproto.Entry {
var entries []logproto.Entry
for i := 0; i < n; i++ {
entries = append(entries, logproto.Entry{
Line: fmt.Sprintf("log line %d", i),
Timestamp: time.Now(),
})
}
return entries
}
func BenchmarkShardStream(b *testing.B) {
stream := logproto.Stream{}
labels := "{app='myapp', job='fizzbuzz'}"
lbs, err := syntax.ParseLabels(labels)
require.NoError(b, err)
stream.Hash = lbs.Hash()
stream.Labels = lbs.String()
allEntries := generateEntries(25000)
desiredRate := 3000
distributorLimits := &validation.Limits{}
flagext.DefaultValues(distributorLimits)
distributorLimits.ShardStreams.DesiredRate = loki_flagext.ByteSize(desiredRate)
overrides, err := validation.NewOverrides(*distributorLimits, nil)
require.NoError(b, err)
validator, err := NewValidator(overrides, nil)
require.NoError(b, err)
distributorBuilder := func(shards int) *Distributor {
d := &Distributor{
validator: validator,
streamShardCount: prometheus.NewCounter(prometheus.CounterOpts{}),
shardTracker: NewShardTracker(),
// streamSize is always zero, so number of shards will be dictated just by the rate returned from store.
rateStore: &fakeRateStore{rate: int64(desiredRate*shards - 1)},
}
return d
}
b.Run("high number of entries, low number of shards", func(b *testing.B) {
d := distributorBuilder(2)
stream.Entries = allEntries
b.ResetTimer()
for n := 0; n < b.N; n++ {
d.shardStream(stream, 0, "fake") //nolint:errcheck
}
})
b.Run("low number of entries, low number of shards", func(b *testing.B) {
d := distributorBuilder(2)
stream.Entries = nil
b.ResetTimer()
for n := 0; n < b.N; n++ {
d.shardStream(stream, 0, "fake") //nolint:errcheck
}
})
b.Run("high number of entries, high number of shards", func(b *testing.B) {
d := distributorBuilder(64)
stream.Entries = allEntries
b.ResetTimer()
for n := 0; n < b.N; n++ {
d.shardStream(stream, 0, "fake") //nolint:errcheck
}
})
b.Run("low number of entries, high number of shards", func(b *testing.B) {
d := distributorBuilder(64)
stream.Entries = nil
b.ResetTimer()
for n := 0; n < b.N; n++ {
d.shardStream(stream, 0, "fake") //nolint:errcheck
}
})
}
func Benchmark_SortLabelsOnPush(b *testing.B) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
d := distributors[0]
request := makeWriteRequest(10, 10)
vCtx := d.validator.getValidationContextForTime(testTime, "123")
for n := 0; n < b.N; n++ {
stream := request.Streams[0]
stream.Labels = `{buzz="f", a="b"}`
_, _, _, err := d.parseStreamLabels(vCtx, stream.Labels, stream)
if err != nil {
panic("parseStreamLabels fail,err:" + err.Error())
}
}
}
func TestParseStreamLabels(t *testing.T) {
defaultLimit := &validation.Limits{}
flagext.DefaultValues(defaultLimit)
for _, tc := range []struct {
name string
origLabels string
expectedLabels labels.Labels
expectedErr error
generateLimits func() *validation.Limits
}{
{
name: "service name label should not get counted against max labels count",
origLabels: `{foo="bar", service_name="unknown_service"}`,
generateLimits: func() *validation.Limits {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.MaxLabelNamesPerSeries = 1
return limits
},
expectedLabels: labels.Labels{
{
Name: "foo",
Value: "bar",
},
{
Name: loghttp_push.LabelServiceName,
Value: loghttp_push.ServiceUnknown,
},
},
},
} {
limits := tc.generateLimits()
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
d := distributors[0]
vCtx := d.validator.getValidationContextForTime(testTime, "123")
t.Run(tc.name, func(t *testing.T) {
lbs, lbsString, hash, err := d.parseStreamLabels(vCtx, tc.origLabels, logproto.Stream{
Labels: tc.origLabels,
})
if tc.expectedErr != nil {
require.Equal(t, tc.expectedErr, err)
return
}
require.NoError(t, err)
require.Equal(t, tc.expectedLabels.String(), lbsString)
require.Equal(t, tc.expectedLabels, lbs)
require.Equal(t, tc.expectedLabels.Hash(), hash)
})
}
}
func Benchmark_Push(b *testing.B) {
limits := &validation.Limits{}
flagext.DefaultValues(limits)
limits.IngestionBurstSizeMB = math.MaxInt32
limits.CardinalityLimit = math.MaxInt32
limits.IngestionRateMB = math.MaxInt32
limits.MaxLineSize = math.MaxInt32
limits.RejectOldSamples = true
limits.RejectOldSamplesMaxAge = model.Duration(24 * time.Hour)
limits.CreationGracePeriod = model.Duration(24 * time.Hour)
distributors, _ := prepare(&testing.T{}, 1, 5, limits, nil)
request := makeWriteRequest(100000, 100)
b.ResetTimer()
b.ReportAllocs()
for n := 0; n < b.N; n++ {
_, err := distributors[0].Push(ctx, request)
if err != nil {
require.NoError(b, err)
}
}
}
func TestShardCalculation(t *testing.T) {
megabyte := 1000
desiredRate := 3 * megabyte
for _, tc := range []struct {
name string
streamSize int
rate int64
wantShards int
}{
{
name: "not enough data to be sharded, stream size (1mb) + ingested rate (0mb) < 3mb",
streamSize: 1 * megabyte,
rate: 0,
wantShards: 1,
},
{
name: "enough data to have two shards, stream size (1mb) + ingested rate (4mb) > 3mb",
streamSize: 1 * megabyte,
rate: int64(desiredRate + 1),
wantShards: 2,
},
{