1325 lines
40 KiB
Go
1325 lines
40 KiB
Go
// Copyright 2013 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package remote
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import (
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"context"
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"fmt"
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"math"
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"os"
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"runtime/pprof"
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"sort"
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"strconv"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/go-kit/log"
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"github.com/gogo/protobuf/proto"
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"github.com/golang/snappy"
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"github.com/prometheus/client_golang/prometheus"
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client_testutil "github.com/prometheus/client_golang/prometheus/testutil"
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"github.com/prometheus/common/model"
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"github.com/stretchr/testify/require"
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"go.uber.org/atomic"
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"github.com/prometheus/prometheus/config"
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"github.com/prometheus/prometheus/model/histogram"
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"github.com/prometheus/prometheus/model/labels"
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"github.com/prometheus/prometheus/model/textparse"
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"github.com/prometheus/prometheus/model/timestamp"
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"github.com/prometheus/prometheus/prompb"
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"github.com/prometheus/prometheus/scrape"
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"github.com/prometheus/prometheus/tsdb/chunks"
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"github.com/prometheus/prometheus/tsdb/record"
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)
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const defaultFlushDeadline = 1 * time.Minute
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func newHighestTimestampMetric() *maxTimestamp {
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return &maxTimestamp{
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Gauge: prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: namespace,
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Subsystem: subsystem,
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Name: "highest_timestamp_in_seconds",
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Help: "Highest timestamp that has come into the remote storage via the Appender interface, in seconds since epoch.",
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}),
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}
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}
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func TestSampleDelivery(t *testing.T) {
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testcases := []struct {
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name string
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samples bool
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exemplars bool
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histograms bool
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floatHistograms bool
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}{
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{samples: true, exemplars: false, histograms: false, floatHistograms: false, name: "samples only"},
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{samples: true, exemplars: true, histograms: true, floatHistograms: true, name: "samples, exemplars, and histograms"},
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{samples: false, exemplars: true, histograms: false, floatHistograms: false, name: "exemplars only"},
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{samples: false, exemplars: false, histograms: true, floatHistograms: false, name: "histograms only"},
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{samples: false, exemplars: false, histograms: false, floatHistograms: true, name: "float histograms only"},
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}
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// Let's create an even number of send batches so we don't run into the
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// batch timeout case.
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n := 3
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dir := t.TempDir()
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s := NewStorage(nil, nil, nil, dir, defaultFlushDeadline, nil)
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defer s.Close()
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queueConfig := config.DefaultQueueConfig
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queueConfig.BatchSendDeadline = model.Duration(100 * time.Millisecond)
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queueConfig.MaxShards = 1
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// We need to set URL's so that metric creation doesn't panic.
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writeConfig := baseRemoteWriteConfig("http://test-storage.com")
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writeConfig.QueueConfig = queueConfig
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writeConfig.SendExemplars = true
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writeConfig.SendNativeHistograms = true
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conf := &config.Config{
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GlobalConfig: config.DefaultGlobalConfig,
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RemoteWriteConfigs: []*config.RemoteWriteConfig{
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writeConfig,
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},
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}
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for _, tc := range testcases {
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t.Run(tc.name, func(t *testing.T) {
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var (
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series []record.RefSeries
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samples []record.RefSample
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exemplars []record.RefExemplar
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histograms []record.RefHistogramSample
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floatHistograms []record.RefFloatHistogramSample
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)
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// Generates same series in both cases.
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if tc.samples {
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samples, series = createTimeseries(n, n)
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}
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if tc.exemplars {
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exemplars, series = createExemplars(n, n)
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}
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if tc.histograms {
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histograms, _, series = createHistograms(n, n, false)
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}
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if tc.floatHistograms {
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_, floatHistograms, series = createHistograms(n, n, true)
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}
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// Apply new config.
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queueConfig.Capacity = len(samples)
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queueConfig.MaxSamplesPerSend = len(samples) / 2
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require.NoError(t, s.ApplyConfig(conf))
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hash, err := toHash(writeConfig)
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require.NoError(t, err)
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qm := s.rws.queues[hash]
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c := NewTestWriteClient()
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qm.SetClient(c)
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qm.StoreSeries(series, 0)
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// Send first half of data.
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c.expectSamples(samples[:len(samples)/2], series)
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c.expectExemplars(exemplars[:len(exemplars)/2], series)
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c.expectHistograms(histograms[:len(histograms)/2], series)
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c.expectFloatHistograms(floatHistograms[:len(floatHistograms)/2], series)
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qm.Append(samples[:len(samples)/2])
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qm.AppendExemplars(exemplars[:len(exemplars)/2])
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qm.AppendHistograms(histograms[:len(histograms)/2])
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qm.AppendFloatHistograms(floatHistograms[:len(floatHistograms)/2])
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c.waitForExpectedData(t)
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// Send second half of data.
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c.expectSamples(samples[len(samples)/2:], series)
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c.expectExemplars(exemplars[len(exemplars)/2:], series)
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c.expectHistograms(histograms[len(histograms)/2:], series)
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c.expectFloatHistograms(floatHistograms[len(floatHistograms)/2:], series)
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qm.Append(samples[len(samples)/2:])
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qm.AppendExemplars(exemplars[len(exemplars)/2:])
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qm.AppendHistograms(histograms[len(histograms)/2:])
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qm.AppendFloatHistograms(floatHistograms[len(floatHistograms)/2:])
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c.waitForExpectedData(t)
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})
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}
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}
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func TestMetadataDelivery(t *testing.T) {
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c := NewTestWriteClient()
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dir := t.TempDir()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.Start()
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defer m.Stop()
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metadata := []scrape.MetricMetadata{}
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numMetadata := 1532
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for i := 0; i < numMetadata; i++ {
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metadata = append(metadata, scrape.MetricMetadata{
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Metric: "prometheus_remote_storage_sent_metadata_bytes_total_" + strconv.Itoa(i),
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Type: textparse.MetricTypeCounter,
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Help: "a nice help text",
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Unit: "",
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})
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}
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m.AppendMetadata(context.Background(), metadata)
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require.Equal(t, numMetadata, len(c.receivedMetadata))
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// One more write than the rounded qoutient should be performed in order to get samples that didn't
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// fit into MaxSamplesPerSend.
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require.Equal(t, numMetadata/mcfg.MaxSamplesPerSend+1, c.writesReceived)
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// Make sure the last samples were sent.
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require.Equal(t, c.receivedMetadata[metadata[len(metadata)-1].Metric][0].MetricFamilyName, metadata[len(metadata)-1].Metric)
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}
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func TestSampleDeliveryTimeout(t *testing.T) {
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// Let's send one less sample than batch size, and wait the timeout duration
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n := 9
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samples, series := createTimeseries(n, n)
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c := NewTestWriteClient()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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cfg.MaxShards = 1
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cfg.BatchSendDeadline = model.Duration(100 * time.Millisecond)
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dir := t.TempDir()
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.StoreSeries(series, 0)
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m.Start()
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defer m.Stop()
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// Send the samples twice, waiting for the samples in the meantime.
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c.expectSamples(samples, series)
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m.Append(samples)
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c.waitForExpectedData(t)
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c.expectSamples(samples, series)
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m.Append(samples)
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c.waitForExpectedData(t)
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}
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func TestSampleDeliveryOrder(t *testing.T) {
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ts := 10
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n := config.DefaultQueueConfig.MaxSamplesPerSend * ts
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samples := make([]record.RefSample, 0, n)
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series := make([]record.RefSeries, 0, n)
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for i := 0; i < n; i++ {
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name := fmt.Sprintf("test_metric_%d", i%ts)
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samples = append(samples, record.RefSample{
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Ref: chunks.HeadSeriesRef(i),
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T: int64(i),
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V: float64(i),
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})
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series = append(series, record.RefSeries{
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Ref: chunks.HeadSeriesRef(i),
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Labels: labels.FromStrings("__name__", name),
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})
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}
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c := NewTestWriteClient()
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c.expectSamples(samples, series)
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dir := t.TempDir()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.StoreSeries(series, 0)
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m.Start()
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defer m.Stop()
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// These should be received by the client.
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m.Append(samples)
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c.waitForExpectedData(t)
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}
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func TestShutdown(t *testing.T) {
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deadline := 1 * time.Second
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c := NewTestBlockedWriteClient()
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dir := t.TempDir()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, deadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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n := 2 * config.DefaultQueueConfig.MaxSamplesPerSend
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samples, series := createTimeseries(n, n)
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m.StoreSeries(series, 0)
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m.Start()
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// Append blocks to guarantee delivery, so we do it in the background.
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go func() {
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m.Append(samples)
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}()
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time.Sleep(100 * time.Millisecond)
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// Test to ensure that Stop doesn't block.
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start := time.Now()
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m.Stop()
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// The samples will never be delivered, so duration should
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// be at least equal to deadline, otherwise the flush deadline
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// was not respected.
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duration := time.Since(start)
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if duration > deadline+(deadline/10) {
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t.Errorf("Took too long to shutdown: %s > %s", duration, deadline)
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}
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if duration < deadline {
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t.Errorf("Shutdown occurred before flush deadline: %s < %s", duration, deadline)
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}
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}
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func TestSeriesReset(t *testing.T) {
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c := NewTestBlockedWriteClient()
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deadline := 5 * time.Second
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numSegments := 4
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numSeries := 25
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dir := t.TempDir()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, deadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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for i := 0; i < numSegments; i++ {
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series := []record.RefSeries{}
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for j := 0; j < numSeries; j++ {
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series = append(series, record.RefSeries{Ref: chunks.HeadSeriesRef((i * 100) + j), Labels: labels.FromStrings("a", "a")})
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}
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m.StoreSeries(series, i)
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}
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require.Equal(t, numSegments*numSeries, len(m.seriesLabels))
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m.SeriesReset(2)
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require.Equal(t, numSegments*numSeries/2, len(m.seriesLabels))
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}
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func TestReshard(t *testing.T) {
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size := 10 // Make bigger to find more races.
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nSeries := 6
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nSamples := config.DefaultQueueConfig.Capacity * size
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samples, series := createTimeseries(nSamples, nSeries)
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c := NewTestWriteClient()
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c.expectSamples(samples, series)
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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cfg.MaxShards = 1
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dir := t.TempDir()
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.StoreSeries(series, 0)
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m.Start()
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defer m.Stop()
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go func() {
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for i := 0; i < len(samples); i += config.DefaultQueueConfig.Capacity {
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sent := m.Append(samples[i : i+config.DefaultQueueConfig.Capacity])
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require.True(t, sent, "samples not sent")
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time.Sleep(100 * time.Millisecond)
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}
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}()
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for i := 1; i < len(samples)/config.DefaultQueueConfig.Capacity; i++ {
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m.shards.stop()
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m.shards.start(i)
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time.Sleep(100 * time.Millisecond)
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}
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c.waitForExpectedData(t)
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}
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func TestReshardRaceWithStop(*testing.T) {
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c := NewTestWriteClient()
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var m *QueueManager
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h := sync.Mutex{}
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h.Lock()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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exitCh := make(chan struct{})
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go func() {
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for {
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metrics := newQueueManagerMetrics(nil, "", "")
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m = NewQueueManager(metrics, nil, nil, nil, "", newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.Start()
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h.Unlock()
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h.Lock()
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m.Stop()
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select {
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case exitCh <- struct{}{}:
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return
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default:
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}
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}
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}()
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for i := 1; i < 100; i++ {
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h.Lock()
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m.reshardChan <- i
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h.Unlock()
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}
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<-exitCh
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}
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func TestReshardPartialBatch(t *testing.T) {
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samples, series := createTimeseries(1, 10)
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c := NewTestBlockedWriteClient()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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cfg.MaxShards = 1
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batchSendDeadline := time.Millisecond
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flushDeadline := 10 * time.Millisecond
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cfg.BatchSendDeadline = model.Duration(batchSendDeadline)
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, t.TempDir(), newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, flushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.StoreSeries(series, 0)
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m.Start()
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for i := 0; i < 100; i++ {
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done := make(chan struct{})
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go func() {
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m.Append(samples)
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time.Sleep(batchSendDeadline)
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m.shards.stop()
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m.shards.start(1)
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done <- struct{}{}
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}()
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select {
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case <-done:
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case <-time.After(2 * time.Second):
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t.Error("Deadlock between sending and stopping detected")
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pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
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t.FailNow()
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}
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}
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// We can only call stop if there was not a deadlock.
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m.Stop()
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}
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// TestQueueFilledDeadlock makes sure the code does not deadlock in the case
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// where a large scrape (> capacity + max samples per send) is appended at the
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// same time as a batch times out according to the batch send deadline.
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func TestQueueFilledDeadlock(t *testing.T) {
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samples, series := createTimeseries(50, 1)
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c := NewNopWriteClient()
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
|
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cfg.MaxShards = 1
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cfg.MaxSamplesPerSend = 10
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cfg.Capacity = 20
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flushDeadline := time.Second
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batchSendDeadline := time.Millisecond
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cfg.BatchSendDeadline = model.Duration(batchSendDeadline)
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metrics := newQueueManagerMetrics(nil, "", "")
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m := NewQueueManager(metrics, nil, nil, nil, t.TempDir(), newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, flushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.StoreSeries(series, 0)
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m.Start()
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defer m.Stop()
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for i := 0; i < 100; i++ {
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done := make(chan struct{})
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go func() {
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time.Sleep(batchSendDeadline)
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m.Append(samples)
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done <- struct{}{}
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}()
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select {
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case <-done:
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case <-time.After(2 * time.Second):
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t.Error("Deadlock between sending and appending detected")
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pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
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t.FailNow()
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}
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}
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}
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|
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func TestReleaseNoninternedString(t *testing.T) {
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cfg := config.DefaultQueueConfig
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mcfg := config.DefaultMetadataConfig
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metrics := newQueueManagerMetrics(nil, "", "")
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c := NewTestWriteClient()
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m := NewQueueManager(metrics, nil, nil, nil, "", newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
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m.Start()
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defer m.Stop()
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|
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for i := 1; i < 1000; i++ {
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m.StoreSeries([]record.RefSeries{
|
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{
|
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Ref: chunks.HeadSeriesRef(i),
|
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Labels: labels.FromStrings("asdf", fmt.Sprintf("%d", i)),
|
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},
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}, 0)
|
|
m.SeriesReset(1)
|
|
}
|
|
|
|
metric := client_testutil.ToFloat64(noReferenceReleases)
|
|
require.Equal(t, 0.0, metric, "expected there to be no calls to release for strings that were not already interned: %d", int(metric))
|
|
}
|
|
|
|
func TestShouldReshard(t *testing.T) {
|
|
type testcase struct {
|
|
startingShards int
|
|
samplesIn, samplesOut, lastSendTimestamp int64
|
|
expectedToReshard bool
|
|
}
|
|
cases := []testcase{
|
|
{
|
|
// Resharding shouldn't take place if the last successful send was > batch send deadline*2 seconds ago.
|
|
startingShards: 10,
|
|
samplesIn: 1000,
|
|
samplesOut: 10,
|
|
lastSendTimestamp: time.Now().Unix() - int64(3*time.Duration(config.DefaultQueueConfig.BatchSendDeadline)/time.Second),
|
|
expectedToReshard: false,
|
|
},
|
|
{
|
|
startingShards: 5,
|
|
samplesIn: 1000,
|
|
samplesOut: 10,
|
|
lastSendTimestamp: time.Now().Unix(),
|
|
expectedToReshard: true,
|
|
},
|
|
}
|
|
|
|
cfg := config.DefaultQueueConfig
|
|
mcfg := config.DefaultMetadataConfig
|
|
for _, c := range cases {
|
|
metrics := newQueueManagerMetrics(nil, "", "")
|
|
client := NewTestWriteClient()
|
|
m := NewQueueManager(metrics, nil, nil, nil, "", newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, client, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
|
|
m.numShards = c.startingShards
|
|
m.dataIn.incr(c.samplesIn)
|
|
m.dataOut.incr(c.samplesOut)
|
|
m.lastSendTimestamp.Store(c.lastSendTimestamp)
|
|
|
|
m.Start()
|
|
|
|
desiredShards := m.calculateDesiredShards()
|
|
shouldReshard := m.shouldReshard(desiredShards)
|
|
|
|
m.Stop()
|
|
|
|
require.Equal(t, c.expectedToReshard, shouldReshard)
|
|
}
|
|
}
|
|
|
|
func createTimeseries(numSamples, numSeries int, extraLabels ...labels.Label) ([]record.RefSample, []record.RefSeries) {
|
|
samples := make([]record.RefSample, 0, numSamples)
|
|
series := make([]record.RefSeries, 0, numSeries)
|
|
b := labels.ScratchBuilder{}
|
|
for i := 0; i < numSeries; i++ {
|
|
name := fmt.Sprintf("test_metric_%d", i)
|
|
for j := 0; j < numSamples; j++ {
|
|
samples = append(samples, record.RefSample{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
T: int64(j),
|
|
V: float64(i),
|
|
})
|
|
}
|
|
// Create Labels that is name of series plus any extra labels supplied.
|
|
b.Reset()
|
|
b.Add(labels.MetricName, name)
|
|
for _, l := range extraLabels {
|
|
b.Add(l.Name, l.Value)
|
|
}
|
|
b.Sort()
|
|
series = append(series, record.RefSeries{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
Labels: b.Labels(),
|
|
})
|
|
}
|
|
return samples, series
|
|
}
|
|
|
|
func createExemplars(numExemplars, numSeries int) ([]record.RefExemplar, []record.RefSeries) {
|
|
exemplars := make([]record.RefExemplar, 0, numExemplars)
|
|
series := make([]record.RefSeries, 0, numSeries)
|
|
for i := 0; i < numSeries; i++ {
|
|
name := fmt.Sprintf("test_metric_%d", i)
|
|
for j := 0; j < numExemplars; j++ {
|
|
e := record.RefExemplar{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
T: int64(j),
|
|
V: float64(i),
|
|
Labels: labels.FromStrings("traceID", fmt.Sprintf("trace-%d", i)),
|
|
}
|
|
exemplars = append(exemplars, e)
|
|
}
|
|
series = append(series, record.RefSeries{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
Labels: labels.FromStrings("__name__", name),
|
|
})
|
|
}
|
|
return exemplars, series
|
|
}
|
|
|
|
func createHistograms(numSamples, numSeries int, floatHistogram bool) ([]record.RefHistogramSample, []record.RefFloatHistogramSample, []record.RefSeries) {
|
|
histograms := make([]record.RefHistogramSample, 0, numSamples)
|
|
floatHistograms := make([]record.RefFloatHistogramSample, 0, numSamples)
|
|
series := make([]record.RefSeries, 0, numSeries)
|
|
for i := 0; i < numSeries; i++ {
|
|
name := fmt.Sprintf("test_metric_%d", i)
|
|
for j := 0; j < numSamples; j++ {
|
|
hist := &histogram.Histogram{
|
|
Schema: 2,
|
|
ZeroThreshold: 1e-128,
|
|
ZeroCount: 0,
|
|
Count: 2,
|
|
Sum: 0,
|
|
PositiveSpans: []histogram.Span{{Offset: 0, Length: 1}},
|
|
PositiveBuckets: []int64{int64(i) + 1},
|
|
NegativeSpans: []histogram.Span{{Offset: 0, Length: 1}},
|
|
NegativeBuckets: []int64{int64(-i) - 1},
|
|
}
|
|
|
|
if floatHistogram {
|
|
fh := record.RefFloatHistogramSample{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
T: int64(j),
|
|
FH: hist.ToFloat(),
|
|
}
|
|
floatHistograms = append(floatHistograms, fh)
|
|
} else {
|
|
h := record.RefHistogramSample{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
T: int64(j),
|
|
H: hist,
|
|
}
|
|
histograms = append(histograms, h)
|
|
}
|
|
}
|
|
series = append(series, record.RefSeries{
|
|
Ref: chunks.HeadSeriesRef(i),
|
|
Labels: labels.FromStrings("__name__", name),
|
|
})
|
|
}
|
|
if floatHistogram {
|
|
return nil, floatHistograms, series
|
|
}
|
|
return histograms, nil, series
|
|
}
|
|
|
|
func getSeriesNameFromRef(r record.RefSeries) string {
|
|
return r.Labels.Get("__name__")
|
|
}
|
|
|
|
type TestWriteClient struct {
|
|
receivedSamples map[string][]prompb.Sample
|
|
expectedSamples map[string][]prompb.Sample
|
|
receivedExemplars map[string][]prompb.Exemplar
|
|
expectedExemplars map[string][]prompb.Exemplar
|
|
receivedHistograms map[string][]prompb.Histogram
|
|
receivedFloatHistograms map[string][]prompb.Histogram
|
|
expectedHistograms map[string][]prompb.Histogram
|
|
expectedFloatHistograms map[string][]prompb.Histogram
|
|
receivedMetadata map[string][]prompb.MetricMetadata
|
|
writesReceived int
|
|
withWaitGroup bool
|
|
wg sync.WaitGroup
|
|
mtx sync.Mutex
|
|
buf []byte
|
|
}
|
|
|
|
func NewTestWriteClient() *TestWriteClient {
|
|
return &TestWriteClient{
|
|
withWaitGroup: true,
|
|
receivedSamples: map[string][]prompb.Sample{},
|
|
expectedSamples: map[string][]prompb.Sample{},
|
|
receivedMetadata: map[string][]prompb.MetricMetadata{},
|
|
}
|
|
}
|
|
|
|
func (c *TestWriteClient) expectSamples(ss []record.RefSample, series []record.RefSeries) {
|
|
if !c.withWaitGroup {
|
|
return
|
|
}
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
c.expectedSamples = map[string][]prompb.Sample{}
|
|
c.receivedSamples = map[string][]prompb.Sample{}
|
|
|
|
for _, s := range ss {
|
|
seriesName := getSeriesNameFromRef(series[s.Ref])
|
|
c.expectedSamples[seriesName] = append(c.expectedSamples[seriesName], prompb.Sample{
|
|
Timestamp: s.T,
|
|
Value: s.V,
|
|
})
|
|
}
|
|
c.wg.Add(len(ss))
|
|
}
|
|
|
|
func (c *TestWriteClient) expectExemplars(ss []record.RefExemplar, series []record.RefSeries) {
|
|
if !c.withWaitGroup {
|
|
return
|
|
}
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
c.expectedExemplars = map[string][]prompb.Exemplar{}
|
|
c.receivedExemplars = map[string][]prompb.Exemplar{}
|
|
|
|
for _, s := range ss {
|
|
seriesName := getSeriesNameFromRef(series[s.Ref])
|
|
e := prompb.Exemplar{
|
|
Labels: labelsToLabelsProto(s.Labels, nil),
|
|
Timestamp: s.T,
|
|
Value: s.V,
|
|
}
|
|
c.expectedExemplars[seriesName] = append(c.expectedExemplars[seriesName], e)
|
|
}
|
|
c.wg.Add(len(ss))
|
|
}
|
|
|
|
func (c *TestWriteClient) expectHistograms(hh []record.RefHistogramSample, series []record.RefSeries) {
|
|
if !c.withWaitGroup {
|
|
return
|
|
}
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
c.expectedHistograms = map[string][]prompb.Histogram{}
|
|
c.receivedHistograms = map[string][]prompb.Histogram{}
|
|
|
|
for _, h := range hh {
|
|
seriesName := getSeriesNameFromRef(series[h.Ref])
|
|
c.expectedHistograms[seriesName] = append(c.expectedHistograms[seriesName], HistogramToHistogramProto(h.T, h.H))
|
|
}
|
|
c.wg.Add(len(hh))
|
|
}
|
|
|
|
func (c *TestWriteClient) expectFloatHistograms(fhs []record.RefFloatHistogramSample, series []record.RefSeries) {
|
|
if !c.withWaitGroup {
|
|
return
|
|
}
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
|
|
c.expectedFloatHistograms = map[string][]prompb.Histogram{}
|
|
c.receivedFloatHistograms = map[string][]prompb.Histogram{}
|
|
|
|
for _, fh := range fhs {
|
|
seriesName := getSeriesNameFromRef(series[fh.Ref])
|
|
c.expectedFloatHistograms[seriesName] = append(c.expectedFloatHistograms[seriesName], FloatHistogramToHistogramProto(fh.T, fh.FH))
|
|
}
|
|
c.wg.Add(len(fhs))
|
|
}
|
|
|
|
func (c *TestWriteClient) waitForExpectedData(tb testing.TB) {
|
|
if !c.withWaitGroup {
|
|
return
|
|
}
|
|
c.wg.Wait()
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
for ts, expectedSamples := range c.expectedSamples {
|
|
require.Equal(tb, expectedSamples, c.receivedSamples[ts], ts)
|
|
}
|
|
for ts, expectedExemplar := range c.expectedExemplars {
|
|
require.Equal(tb, expectedExemplar, c.receivedExemplars[ts], ts)
|
|
}
|
|
for ts, expectedHistogram := range c.expectedHistograms {
|
|
require.Equal(tb, expectedHistogram, c.receivedHistograms[ts], ts)
|
|
}
|
|
for ts, expectedFloatHistogram := range c.expectedFloatHistograms {
|
|
require.Equal(tb, expectedFloatHistogram, c.receivedFloatHistograms[ts], ts)
|
|
}
|
|
}
|
|
|
|
func (c *TestWriteClient) Store(_ context.Context, req []byte, _ int) error {
|
|
c.mtx.Lock()
|
|
defer c.mtx.Unlock()
|
|
// nil buffers are ok for snappy, ignore cast error.
|
|
if c.buf != nil {
|
|
c.buf = c.buf[:cap(c.buf)]
|
|
}
|
|
reqBuf, err := snappy.Decode(c.buf, req)
|
|
c.buf = reqBuf
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var reqProto prompb.WriteRequest
|
|
if err := proto.Unmarshal(reqBuf, &reqProto); err != nil {
|
|
return err
|
|
}
|
|
count := 0
|
|
for _, ts := range reqProto.Timeseries {
|
|
labels := labelProtosToLabels(ts.Labels)
|
|
seriesName := labels.Get("__name__")
|
|
for _, sample := range ts.Samples {
|
|
count++
|
|
c.receivedSamples[seriesName] = append(c.receivedSamples[seriesName], sample)
|
|
}
|
|
|
|
for _, ex := range ts.Exemplars {
|
|
count++
|
|
c.receivedExemplars[seriesName] = append(c.receivedExemplars[seriesName], ex)
|
|
}
|
|
|
|
for _, histogram := range ts.Histograms {
|
|
count++
|
|
if histogram.IsFloatHistogram() {
|
|
c.receivedFloatHistograms[seriesName] = append(c.receivedFloatHistograms[seriesName], histogram)
|
|
} else {
|
|
c.receivedHistograms[seriesName] = append(c.receivedHistograms[seriesName], histogram)
|
|
}
|
|
|
|
}
|
|
}
|
|
if c.withWaitGroup {
|
|
c.wg.Add(-count)
|
|
}
|
|
|
|
for _, m := range reqProto.Metadata {
|
|
c.receivedMetadata[m.MetricFamilyName] = append(c.receivedMetadata[m.MetricFamilyName], m)
|
|
}
|
|
|
|
c.writesReceived++
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *TestWriteClient) Name() string {
|
|
return "testwriteclient"
|
|
}
|
|
|
|
func (c *TestWriteClient) Endpoint() string {
|
|
return "http://test-remote.com/1234"
|
|
}
|
|
|
|
// TestBlockingWriteClient is a queue_manager WriteClient which will block
|
|
// on any calls to Store(), until the request's Context is cancelled, at which
|
|
// point the `numCalls` property will contain a count of how many times Store()
|
|
// was called.
|
|
type TestBlockingWriteClient struct {
|
|
numCalls atomic.Uint64
|
|
}
|
|
|
|
func NewTestBlockedWriteClient() *TestBlockingWriteClient {
|
|
return &TestBlockingWriteClient{}
|
|
}
|
|
|
|
func (c *TestBlockingWriteClient) Store(ctx context.Context, _ []byte, _ int) error {
|
|
c.numCalls.Inc()
|
|
<-ctx.Done()
|
|
return nil
|
|
}
|
|
|
|
func (c *TestBlockingWriteClient) NumCalls() uint64 {
|
|
return c.numCalls.Load()
|
|
}
|
|
|
|
func (c *TestBlockingWriteClient) Name() string {
|
|
return "testblockingwriteclient"
|
|
}
|
|
|
|
func (c *TestBlockingWriteClient) Endpoint() string {
|
|
return "http://test-remote-blocking.com/1234"
|
|
}
|
|
|
|
// For benchmarking the send and not the receive side.
|
|
type NopWriteClient struct{}
|
|
|
|
func NewNopWriteClient() *NopWriteClient { return &NopWriteClient{} }
|
|
func (c *NopWriteClient) Store(context.Context, []byte, int) error { return nil }
|
|
func (c *NopWriteClient) Name() string { return "nopwriteclient" }
|
|
func (c *NopWriteClient) Endpoint() string { return "http://test-remote.com/1234" }
|
|
|
|
func BenchmarkSampleSend(b *testing.B) {
|
|
// Send one sample per series, which is the typical remote_write case
|
|
const numSamples = 1
|
|
const numSeries = 10000
|
|
|
|
// Extra labels to make a more realistic workload - taken from Kubernetes' embedded cAdvisor metrics.
|
|
extraLabels := []labels.Label{
|
|
{Name: "kubernetes_io_arch", Value: "amd64"},
|
|
{Name: "kubernetes_io_instance_type", Value: "c3.somesize"},
|
|
{Name: "kubernetes_io_os", Value: "linux"},
|
|
{Name: "container_name", Value: "some-name"},
|
|
{Name: "failure_domain_kubernetes_io_region", Value: "somewhere-1"},
|
|
{Name: "failure_domain_kubernetes_io_zone", Value: "somewhere-1b"},
|
|
{Name: "id", Value: "/kubepods/burstable/pod6e91c467-e4c5-11e7-ace3-0a97ed59c75e/a3c8498918bd6866349fed5a6f8c643b77c91836427fb6327913276ebc6bde28"},
|
|
{Name: "image", Value: "registry/organisation/name@sha256:dca3d877a80008b45d71d7edc4fd2e44c0c8c8e7102ba5cbabec63a374d1d506"},
|
|
{Name: "instance", Value: "ip-111-11-1-11.ec2.internal"},
|
|
{Name: "job", Value: "kubernetes-cadvisor"},
|
|
{Name: "kubernetes_io_hostname", Value: "ip-111-11-1-11"},
|
|
{Name: "monitor", Value: "prod"},
|
|
{Name: "name", Value: "k8s_some-name_some-other-name-5j8s8_kube-system_6e91c467-e4c5-11e7-ace3-0a97ed59c75e_0"},
|
|
{Name: "namespace", Value: "kube-system"},
|
|
{Name: "pod_name", Value: "some-other-name-5j8s8"},
|
|
}
|
|
samples, series := createTimeseries(numSamples, numSeries, extraLabels...)
|
|
|
|
c := NewNopWriteClient()
|
|
|
|
cfg := config.DefaultQueueConfig
|
|
mcfg := config.DefaultMetadataConfig
|
|
cfg.BatchSendDeadline = model.Duration(100 * time.Millisecond)
|
|
cfg.MinShards = 20
|
|
cfg.MaxShards = 20
|
|
|
|
dir := b.TempDir()
|
|
|
|
metrics := newQueueManagerMetrics(nil, "", "")
|
|
m := NewQueueManager(metrics, nil, nil, nil, dir, newEWMARate(ewmaWeight, shardUpdateDuration), cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
|
|
m.StoreSeries(series, 0)
|
|
|
|
// These should be received by the client.
|
|
m.Start()
|
|
defer m.Stop()
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
m.Append(samples)
|
|
m.UpdateSeriesSegment(series, i+1) // simulate what wlog.Watcher.garbageCollectSeries does
|
|
m.SeriesReset(i + 1)
|
|
}
|
|
// Do not include shutdown
|
|
b.StopTimer()
|
|
}
|
|
|
|
func BenchmarkStartup(b *testing.B) {
|
|
dir := os.Getenv("WALDIR")
|
|
if dir == "" {
|
|
return
|
|
}
|
|
|
|
// Find the second largest segment; we will replay up to this.
|
|
// (Second largest as WALWatcher will start tailing the largest).
|
|
dirents, err := os.ReadDir(dir)
|
|
require.NoError(b, err)
|
|
|
|
var segments []int
|
|
for _, dirent := range dirents {
|
|
if i, err := strconv.Atoi(dirent.Name()); err != nil {
|
|
segments = append(segments, i)
|
|
}
|
|
}
|
|
sort.Ints(segments)
|
|
|
|
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stdout))
|
|
logger = log.With(logger, "caller", log.DefaultCaller)
|
|
|
|
cfg := config.DefaultQueueConfig
|
|
mcfg := config.DefaultMetadataConfig
|
|
for n := 0; n < b.N; n++ {
|
|
metrics := newQueueManagerMetrics(nil, "", "")
|
|
c := NewTestBlockedWriteClient()
|
|
m := NewQueueManager(metrics, nil, nil, logger, dir,
|
|
newEWMARate(ewmaWeight, shardUpdateDuration),
|
|
cfg, mcfg, labels.EmptyLabels(), nil, c, 1*time.Minute, newPool(), newHighestTimestampMetric(), nil, false, false)
|
|
m.watcher.SetStartTime(timestamp.Time(math.MaxInt64))
|
|
m.watcher.MaxSegment = segments[len(segments)-2]
|
|
err := m.watcher.Run()
|
|
require.NoError(b, err)
|
|
}
|
|
}
|
|
|
|
func TestProcessExternalLabels(t *testing.T) {
|
|
for _, tc := range []struct {
|
|
labels labels.Labels
|
|
externalLabels []labels.Label
|
|
expected labels.Labels
|
|
}{
|
|
// Test adding labels at the end.
|
|
{
|
|
labels: labels.FromStrings("a", "b"),
|
|
externalLabels: []labels.Label{{Name: "c", Value: "d"}},
|
|
expected: labels.FromStrings("a", "b", "c", "d"),
|
|
},
|
|
|
|
// Test adding labels at the beginning.
|
|
{
|
|
labels: labels.FromStrings("c", "d"),
|
|
externalLabels: []labels.Label{{Name: "a", Value: "b"}},
|
|
expected: labels.FromStrings("a", "b", "c", "d"),
|
|
},
|
|
|
|
// Test we don't override existing labels.
|
|
{
|
|
labels: labels.FromStrings("a", "b"),
|
|
externalLabels: []labels.Label{{Name: "a", Value: "c"}},
|
|
expected: labels.FromStrings("a", "b"),
|
|
},
|
|
|
|
// Test empty externalLabels.
|
|
{
|
|
labels: labels.FromStrings("a", "b"),
|
|
externalLabels: []labels.Label{},
|
|
expected: labels.FromStrings("a", "b"),
|
|
},
|
|
|
|
// Test empty labels.
|
|
{
|
|
labels: labels.EmptyLabels(),
|
|
externalLabels: []labels.Label{{Name: "a", Value: "b"}},
|
|
expected: labels.FromStrings("a", "b"),
|
|
},
|
|
|
|
// Test labels is longer than externalLabels.
|
|
{
|
|
labels: labels.FromStrings("a", "b", "c", "d"),
|
|
externalLabels: []labels.Label{{Name: "e", Value: "f"}},
|
|
expected: labels.FromStrings("a", "b", "c", "d", "e", "f"),
|
|
},
|
|
|
|
// Test externalLabels is longer than labels.
|
|
{
|
|
labels: labels.FromStrings("c", "d"),
|
|
externalLabels: []labels.Label{{Name: "a", Value: "b"}, {Name: "e", Value: "f"}},
|
|
expected: labels.FromStrings("a", "b", "c", "d", "e", "f"),
|
|
},
|
|
|
|
// Adding with and without clashing labels.
|
|
{
|
|
labels: labels.FromStrings("a", "b", "c", "d"),
|
|
externalLabels: []labels.Label{{Name: "a", Value: "xxx"}, {Name: "c", Value: "yyy"}, {Name: "e", Value: "f"}},
|
|
expected: labels.FromStrings("a", "b", "c", "d", "e", "f"),
|
|
},
|
|
} {
|
|
require.Equal(t, tc.expected, processExternalLabels(tc.labels, tc.externalLabels))
|
|
}
|
|
}
|
|
|
|
func TestCalculateDesiredShards(t *testing.T) {
|
|
c := NewTestWriteClient()
|
|
cfg := config.DefaultQueueConfig
|
|
mcfg := config.DefaultMetadataConfig
|
|
|
|
dir := t.TempDir()
|
|
|
|
metrics := newQueueManagerMetrics(nil, "", "")
|
|
samplesIn := newEWMARate(ewmaWeight, shardUpdateDuration)
|
|
m := NewQueueManager(metrics, nil, nil, nil, dir, samplesIn, cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
|
|
|
|
// Need to start the queue manager so the proper metrics are initialized.
|
|
// However we can stop it right away since we don't need to do any actual
|
|
// processing.
|
|
m.Start()
|
|
m.Stop()
|
|
|
|
inputRate := int64(50000)
|
|
var pendingSamples int64
|
|
|
|
// Two minute startup, no samples are sent.
|
|
startedAt := time.Now().Add(-2 * time.Minute)
|
|
|
|
// helper function for adding samples.
|
|
addSamples := func(s int64, ts time.Duration) {
|
|
pendingSamples += s
|
|
samplesIn.incr(s)
|
|
samplesIn.tick()
|
|
|
|
m.highestRecvTimestamp.Set(float64(startedAt.Add(ts).Unix()))
|
|
}
|
|
|
|
// helper function for sending samples.
|
|
sendSamples := func(s int64, ts time.Duration) {
|
|
pendingSamples -= s
|
|
m.dataOut.incr(s)
|
|
m.dataOutDuration.incr(int64(m.numShards) * int64(shardUpdateDuration))
|
|
|
|
// highest sent is how far back pending samples would be at our input rate.
|
|
highestSent := startedAt.Add(ts - time.Duration(pendingSamples/inputRate)*time.Second)
|
|
m.metrics.highestSentTimestamp.Set(float64(highestSent.Unix()))
|
|
|
|
m.lastSendTimestamp.Store(time.Now().Unix())
|
|
}
|
|
|
|
ts := time.Duration(0)
|
|
for ; ts < 120*time.Second; ts += shardUpdateDuration {
|
|
addSamples(inputRate*int64(shardUpdateDuration/time.Second), ts)
|
|
m.numShards = m.calculateDesiredShards()
|
|
require.Equal(t, 1, m.numShards)
|
|
}
|
|
|
|
// Assume 100ms per request, or 10 requests per second per shard.
|
|
// Shard calculation should never drop below barely keeping up.
|
|
minShards := int(inputRate) / cfg.MaxSamplesPerSend / 10
|
|
// This test should never go above 200 shards, that would be more resources than needed.
|
|
maxShards := 200
|
|
|
|
for ; ts < 15*time.Minute; ts += shardUpdateDuration {
|
|
sin := inputRate * int64(shardUpdateDuration/time.Second)
|
|
addSamples(sin, ts)
|
|
|
|
sout := int64(m.numShards*cfg.MaxSamplesPerSend) * int64(shardUpdateDuration/(100*time.Millisecond))
|
|
// You can't send samples that don't exist so cap at the number of pending samples.
|
|
if sout > pendingSamples {
|
|
sout = pendingSamples
|
|
}
|
|
sendSamples(sout, ts)
|
|
|
|
t.Log("desiredShards", m.numShards, "pendingSamples", pendingSamples)
|
|
m.numShards = m.calculateDesiredShards()
|
|
require.GreaterOrEqual(t, m.numShards, minShards, "Shards are too low. desiredShards=%d, minShards=%d, t_seconds=%d", m.numShards, minShards, ts/time.Second)
|
|
require.LessOrEqual(t, m.numShards, maxShards, "Shards are too high. desiredShards=%d, maxShards=%d, t_seconds=%d", m.numShards, maxShards, ts/time.Second)
|
|
}
|
|
require.Equal(t, int64(0), pendingSamples, "Remote write never caught up, there are still %d pending samples.", pendingSamples)
|
|
}
|
|
|
|
func TestCalculateDesiredShardsDetail(t *testing.T) {
|
|
c := NewTestWriteClient()
|
|
cfg := config.DefaultQueueConfig
|
|
mcfg := config.DefaultMetadataConfig
|
|
|
|
dir := t.TempDir()
|
|
|
|
metrics := newQueueManagerMetrics(nil, "", "")
|
|
samplesIn := newEWMARate(ewmaWeight, shardUpdateDuration)
|
|
m := NewQueueManager(metrics, nil, nil, nil, dir, samplesIn, cfg, mcfg, labels.EmptyLabels(), nil, c, defaultFlushDeadline, newPool(), newHighestTimestampMetric(), nil, false, false)
|
|
|
|
for _, tc := range []struct {
|
|
name string
|
|
prevShards int
|
|
dataIn int64 // Quantities normalised to seconds.
|
|
dataOut int64
|
|
dataDropped int64
|
|
dataOutDuration float64
|
|
backlog float64
|
|
expectedShards int
|
|
}{
|
|
{
|
|
name: "nothing in or out 1",
|
|
prevShards: 1,
|
|
expectedShards: 1, // Shards stays the same.
|
|
},
|
|
{
|
|
name: "nothing in or out 10",
|
|
prevShards: 10,
|
|
expectedShards: 10, // Shards stays the same.
|
|
},
|
|
{
|
|
name: "steady throughput",
|
|
prevShards: 1,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 1,
|
|
expectedShards: 1,
|
|
},
|
|
{
|
|
name: "scale down",
|
|
prevShards: 10,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 5,
|
|
expectedShards: 5,
|
|
},
|
|
{
|
|
name: "scale down constrained",
|
|
prevShards: 7,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 5,
|
|
expectedShards: 7,
|
|
},
|
|
{
|
|
name: "scale up",
|
|
prevShards: 1,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 10,
|
|
expectedShards: 10,
|
|
},
|
|
{
|
|
name: "scale up constrained",
|
|
prevShards: 8,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 10,
|
|
expectedShards: 8,
|
|
},
|
|
{
|
|
name: "backlogged 20s",
|
|
prevShards: 2,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 2,
|
|
backlog: 20,
|
|
expectedShards: 4,
|
|
},
|
|
{
|
|
name: "backlogged 90s",
|
|
prevShards: 4,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 4,
|
|
backlog: 90,
|
|
expectedShards: 22,
|
|
},
|
|
{
|
|
name: "backlog reduced",
|
|
prevShards: 22,
|
|
dataIn: 10,
|
|
dataOut: 20,
|
|
dataOutDuration: 4,
|
|
backlog: 10,
|
|
expectedShards: 3,
|
|
},
|
|
{
|
|
name: "backlog eliminated",
|
|
prevShards: 3,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 2,
|
|
backlog: 0,
|
|
expectedShards: 2, // Shard back down.
|
|
},
|
|
{
|
|
name: "slight slowdown",
|
|
prevShards: 1,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 1.2,
|
|
expectedShards: 2, // 1.2 is rounded up to 2.
|
|
},
|
|
{
|
|
name: "bigger slowdown",
|
|
prevShards: 1,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 1.4,
|
|
expectedShards: 2,
|
|
},
|
|
{
|
|
name: "speed up",
|
|
prevShards: 2,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 1.2,
|
|
backlog: 0,
|
|
expectedShards: 2, // No reaction - 1.2 is rounded up to 2.
|
|
},
|
|
{
|
|
name: "speed up more",
|
|
prevShards: 2,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 0.9,
|
|
backlog: 0,
|
|
expectedShards: 1,
|
|
},
|
|
{
|
|
name: "marginal decision A",
|
|
prevShards: 3,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 2.01,
|
|
backlog: 0,
|
|
expectedShards: 3, // 2.01 rounds up to 3.
|
|
},
|
|
{
|
|
name: "marginal decision B",
|
|
prevShards: 3,
|
|
dataIn: 10,
|
|
dataOut: 10,
|
|
dataOutDuration: 1.99,
|
|
backlog: 0,
|
|
expectedShards: 2, // 1.99 rounds up to 2.
|
|
},
|
|
} {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
m.numShards = tc.prevShards
|
|
forceEMWA(samplesIn, tc.dataIn*int64(shardUpdateDuration/time.Second))
|
|
samplesIn.tick()
|
|
forceEMWA(m.dataOut, tc.dataOut*int64(shardUpdateDuration/time.Second))
|
|
forceEMWA(m.dataDropped, tc.dataDropped*int64(shardUpdateDuration/time.Second))
|
|
forceEMWA(m.dataOutDuration, int64(tc.dataOutDuration*float64(shardUpdateDuration)))
|
|
m.highestRecvTimestamp.value = tc.backlog // Not Set() because it can only increase value.
|
|
|
|
require.Equal(t, tc.expectedShards, m.calculateDesiredShards())
|
|
})
|
|
}
|
|
}
|
|
|
|
func forceEMWA(r *ewmaRate, rate int64) {
|
|
r.init = false
|
|
r.newEvents.Store(rate)
|
|
}
|
|
|
|
func TestQueueManagerMetrics(t *testing.T) {
|
|
reg := prometheus.NewPedanticRegistry()
|
|
metrics := newQueueManagerMetrics(reg, "name", "http://localhost:1234")
|
|
|
|
// Make sure metrics pass linting.
|
|
problems, err := client_testutil.GatherAndLint(reg)
|
|
require.NoError(t, err)
|
|
require.Equal(t, 0, len(problems), "Metric linting problems detected: %v", problems)
|
|
|
|
// Make sure all metrics were unregistered. A failure here means you need
|
|
// unregister a metric in `queueManagerMetrics.unregister()`.
|
|
metrics.unregister()
|
|
err = client_testutil.GatherAndCompare(reg, strings.NewReader(""))
|
|
require.NoError(t, err)
|
|
}
|
|
|
|
func TestQueue_FlushAndShutdownDoesNotDeadlock(t *testing.T) {
|
|
capacity := 100
|
|
batchSize := 10
|
|
queue := newQueue(batchSize, capacity)
|
|
for i := 0; i < capacity+batchSize; i++ {
|
|
queue.Append(timeSeries{})
|
|
}
|
|
|
|
done := make(chan struct{})
|
|
go queue.FlushAndShutdown(done)
|
|
go func() {
|
|
// Give enough time for FlushAndShutdown to acquire the lock. queue.Batch()
|
|
// should not block forever even if the lock is acquired.
|
|
time.Sleep(10 * time.Millisecond)
|
|
queue.Batch()
|
|
close(done)
|
|
}()
|
|
select {
|
|
case <-done:
|
|
case <-time.After(2 * time.Second):
|
|
t.Error("Deadlock in FlushAndShutdown detected")
|
|
pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
|
|
t.FailNow()
|
|
}
|
|
}
|