prometheus/storage/remote/write_handler_test.go

312 lines
9.0 KiB
Go

// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package remote
import (
"bytes"
"context"
"fmt"
"io"
"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/go-kit/log"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/model/exemplar"
"github.com/prometheus/prometheus/model/histogram"
"github.com/prometheus/prometheus/model/labels"
"github.com/prometheus/prometheus/model/metadata"
"github.com/prometheus/prometheus/prompb"
"github.com/prometheus/prometheus/storage"
"github.com/prometheus/prometheus/tsdb"
)
func TestRemoteWriteHandler(t *testing.T) {
buf, _, err := buildWriteRequest(writeRequestFixture.Timeseries, nil, nil, nil)
require.NoError(t, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(t, err)
appendable := &mockAppendable{}
handler := NewWriteHandler(nil, appendable)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
resp := recorder.Result()
require.Equal(t, http.StatusNoContent, resp.StatusCode)
i := 0
j := 0
k := 0
for _, ts := range writeRequestFixture.Timeseries {
labels := labelProtosToLabels(ts.Labels)
for _, s := range ts.Samples {
require.Equal(t, mockSample{labels, s.Timestamp, s.Value}, appendable.samples[i])
i++
}
for _, e := range ts.Exemplars {
exemplarLabels := labelProtosToLabels(e.Labels)
require.Equal(t, mockExemplar{labels, exemplarLabels, e.Timestamp, e.Value}, appendable.exemplars[j])
j++
}
for _, hp := range ts.Histograms {
if hp.GetCountFloat() > 0 || hp.GetZeroCountFloat() > 0 { // It is a float histogram.
fh := FloatHistogramProtoToFloatHistogram(hp)
require.Equal(t, mockHistogram{labels, hp.Timestamp, nil, fh}, appendable.histograms[k])
} else {
h := HistogramProtoToHistogram(hp)
require.Equal(t, mockHistogram{labels, hp.Timestamp, h, nil}, appendable.histograms[k])
}
k++
}
}
}
func TestOutOfOrderSample(t *testing.T) {
buf, _, err := buildWriteRequest([]prompb.TimeSeries{{
Labels: []prompb.Label{{Name: "__name__", Value: "test_metric"}},
Samples: []prompb.Sample{{Value: 1, Timestamp: 0}},
}}, nil, nil, nil)
require.NoError(t, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(t, err)
appendable := &mockAppendable{
latestSample: 100,
}
handler := NewWriteHandler(log.NewNopLogger(), appendable)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
resp := recorder.Result()
require.Equal(t, http.StatusBadRequest, resp.StatusCode)
}
// This test case currently aims to verify that the WriteHandler endpoint
// don't fail on ingestion errors since the exemplar storage is
// still experimental.
func TestOutOfOrderExemplar(t *testing.T) {
buf, _, err := buildWriteRequest([]prompb.TimeSeries{{
Labels: []prompb.Label{{Name: "__name__", Value: "test_metric"}},
Exemplars: []prompb.Exemplar{{Labels: []prompb.Label{{Name: "foo", Value: "bar"}}, Value: 1, Timestamp: 0}},
}}, nil, nil, nil)
require.NoError(t, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(t, err)
appendable := &mockAppendable{
latestExemplar: 100,
}
handler := NewWriteHandler(log.NewNopLogger(), appendable)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
resp := recorder.Result()
// TODO: update to require.Equal(t, http.StatusConflict, resp.StatusCode) once exemplar storage is not experimental.
require.Equal(t, http.StatusNoContent, resp.StatusCode)
}
func TestOutOfOrderHistogram(t *testing.T) {
buf, _, err := buildWriteRequest([]prompb.TimeSeries{{
Labels: []prompb.Label{{Name: "__name__", Value: "test_metric"}},
Histograms: []prompb.Histogram{HistogramToHistogramProto(0, &testHistogram), FloatHistogramToHistogramProto(1, testHistogram.ToFloat())},
}}, nil, nil, nil)
require.NoError(t, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(t, err)
appendable := &mockAppendable{
latestHistogram: 100,
}
handler := NewWriteHandler(log.NewNopLogger(), appendable)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
resp := recorder.Result()
require.Equal(t, http.StatusBadRequest, resp.StatusCode)
}
func TestCommitErr(t *testing.T) {
buf, _, err := buildWriteRequest(writeRequestFixture.Timeseries, nil, nil, nil)
require.NoError(t, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(t, err)
appendable := &mockAppendable{
commitErr: fmt.Errorf("commit error"),
}
handler := NewWriteHandler(log.NewNopLogger(), appendable)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
resp := recorder.Result()
body, err := io.ReadAll(resp.Body)
require.NoError(t, err)
require.Equal(t, http.StatusInternalServerError, resp.StatusCode)
require.Equal(t, "commit error\n", string(body))
}
func BenchmarkRemoteWriteOOOSamples(b *testing.B) {
dir := b.TempDir()
opts := tsdb.DefaultOptions()
opts.OutOfOrderCapMax = 30
opts.OutOfOrderTimeWindow = 120 * time.Minute.Milliseconds()
db, err := tsdb.Open(dir, nil, nil, opts, nil)
require.NoError(b, err)
b.Cleanup(func() {
require.NoError(b, db.Close())
})
handler := NewWriteHandler(log.NewNopLogger(), db.Head())
buf, _, err := buildWriteRequest(genSeriesWithSample(1000, 200*time.Minute.Milliseconds()), nil, nil, nil)
require.NoError(b, err)
req, err := http.NewRequest("", "", bytes.NewReader(buf))
require.NoError(b, err)
recorder := httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
require.Equal(b, http.StatusNoContent, recorder.Code)
require.Equal(b, db.Head().NumSeries(), uint64(1000))
var bufRequests [][]byte
for i := 0; i < 100; i++ {
buf, _, err = buildWriteRequest(genSeriesWithSample(1000, int64(80+i)*time.Minute.Milliseconds()), nil, nil, nil)
require.NoError(b, err)
bufRequests = append(bufRequests, buf)
}
b.ResetTimer()
for i := 0; i < 100; i++ {
req, err = http.NewRequest("", "", bytes.NewReader(bufRequests[i]))
require.NoError(b, err)
recorder = httptest.NewRecorder()
handler.ServeHTTP(recorder, req)
require.Equal(b, http.StatusNoContent, recorder.Code)
require.Equal(b, db.Head().NumSeries(), uint64(1000))
}
}
func genSeriesWithSample(numSeries int, ts int64) []prompb.TimeSeries {
var series []prompb.TimeSeries
for i := 0; i < numSeries; i++ {
s := prompb.TimeSeries{
Labels: []prompb.Label{{Name: "__name__", Value: fmt.Sprintf("test_metric_%d", i)}},
Samples: []prompb.Sample{{Value: float64(i), Timestamp: ts}},
}
series = append(series, s)
}
return series
}
type mockAppendable struct {
latestSample int64
samples []mockSample
latestExemplar int64
exemplars []mockExemplar
latestHistogram int64
histograms []mockHistogram
commitErr error
}
type mockSample struct {
l labels.Labels
t int64
v float64
}
type mockExemplar struct {
l labels.Labels
el labels.Labels
t int64
v float64
}
type mockHistogram struct {
l labels.Labels
t int64
h *histogram.Histogram
fh *histogram.FloatHistogram
}
func (m *mockAppendable) Appender(_ context.Context) storage.Appender {
return m
}
func (m *mockAppendable) Append(_ storage.SeriesRef, l labels.Labels, t int64, v float64) (storage.SeriesRef, error) {
if t < m.latestSample {
return 0, storage.ErrOutOfOrderSample
}
m.latestSample = t
m.samples = append(m.samples, mockSample{l, t, v})
return 0, nil
}
func (m *mockAppendable) Commit() error {
return m.commitErr
}
func (*mockAppendable) Rollback() error {
return fmt.Errorf("not implemented")
}
func (m *mockAppendable) AppendExemplar(_ storage.SeriesRef, l labels.Labels, e exemplar.Exemplar) (storage.SeriesRef, error) {
if e.Ts < m.latestExemplar {
return 0, storage.ErrOutOfOrderExemplar
}
m.latestExemplar = e.Ts
m.exemplars = append(m.exemplars, mockExemplar{l, e.Labels, e.Ts, e.Value})
return 0, nil
}
func (m *mockAppendable) AppendHistogram(_ storage.SeriesRef, l labels.Labels, t int64, h *histogram.Histogram, fh *histogram.FloatHistogram) (storage.SeriesRef, error) {
if t < m.latestHistogram {
return 0, storage.ErrOutOfOrderSample
}
m.latestHistogram = t
m.histograms = append(m.histograms, mockHistogram{l, t, h, fh})
return 0, nil
}
func (m *mockAppendable) UpdateMetadata(_ storage.SeriesRef, _ labels.Labels, _ metadata.Metadata) (storage.SeriesRef, error) {
// TODO: Wire metadata in a mockAppendable field when we get around to handling metadata in remote_write.
// UpdateMetadata is no-op for remote write (where mockAppendable is being used to test) for now.
return 0, nil
}