prometheus/storage/remote/write_handler_test.go

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// 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/ioutil"
"net/http"
"net/http/httptest"
"testing"
"github.com/go-kit/log"
"github.com/stretchr/testify/require"
"github.com/prometheus/prometheus/pkg/exemplar"
"github.com/prometheus/prometheus/pkg/labels"
"github.com/prometheus/prometheus/prompb"
"github.com/prometheus/prometheus/storage"
)
func TestRemoteWriteHandler(t *testing.T) {
buf, _, err := buildWriteRequest(writeRequestFixture.Timeseries, 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
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++
}
}
}
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)
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)
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 TestCommitErr(t *testing.T) {
buf, _, err := buildWriteRequest(writeRequestFixture.Timeseries, 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 := ioutil.ReadAll(resp.Body)
require.NoError(t, err)
require.Equal(t, http.StatusInternalServerError, resp.StatusCode)
require.Equal(t, "commit error\n", string(body))
}
type mockAppendable struct {
latestSample int64
samples []mockSample
latestExemplar int64
exemplars []mockExemplar
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
}
func (m *mockAppendable) Appender(_ context.Context) storage.Appender {
return m
}
func (m *mockAppendable) Append(_ uint64, l labels.Labels, t int64, v float64) (uint64, 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(_ uint64, l labels.Labels, e exemplar.Exemplar) (uint64, 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
}