prometheus/storage/metric/tiered_test.go
2013-03-27 18:13:43 +01:00

530 lines
11 KiB
Go

// Copyright 2013 Prometheus Team
// 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 metric
import (
"github.com/prometheus/prometheus/model"
"github.com/prometheus/prometheus/utility/test"
"sort"
"testing"
"time"
)
type testTieredStorageCloser struct {
storage Storage
directory test.Closer
}
func (t testTieredStorageCloser) Close() {
t.storage.Close()
t.directory.Close()
}
func newTestTieredStorage(t test.Tester) (storage Storage, closer test.Closer) {
var directory test.TemporaryDirectory
directory = test.NewTemporaryDirectory("test_tiered_storage", t)
storage, err := NewTieredStorage(5000000, 2500, 1000, 5*time.Second, 15*time.Second, 0*time.Second, directory.Path())
if err != nil {
t.Fatalf("Error creating storage: %s", err)
}
if storage == nil {
t.Fatalf("storage == nil")
}
go storage.Serve()
closer = &testTieredStorageCloser{
storage: storage,
directory: directory,
}
return
}
func buildSamples(from, to time.Time, interval time.Duration, m model.Metric) (v []model.Sample) {
i := model.SampleValue(0)
for from.Before(to) {
v = append(v, model.Sample{
Metric: m,
Value: i,
Timestamp: from,
})
from = from.Add(interval)
i++
}
return
}
func testMakeView(t test.Tester) {
type in struct {
atTime []getValuesAtTimeOp
atInterval []getValuesAtIntervalOp
alongRange []getValuesAlongRangeOp
}
type out struct {
atTime [][]model.SamplePair
atInterval [][]model.SamplePair
alongRange [][]model.SamplePair
}
var (
instant = time.Date(1984, 3, 30, 0, 0, 0, 0, time.Local)
metric = model.Metric{model.MetricNameLabel: "request_count"}
fingerprint = model.NewFingerprintFromMetric(metric)
scenarios = []struct {
data []model.Sample
in in
out out
}{
// No sample, but query asks for one.
{
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant,
},
},
},
out: out{
atTime: [][]model.SamplePair{{}},
},
},
// Single sample, query asks for exact sample time.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant,
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant,
Value: 0,
},
},
},
},
},
// Single sample, query time before the sample.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant.Add(time.Second),
},
{
Metric: metric,
Value: 1,
Timestamp: instant.Add(time.Second * 2),
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant,
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant.Add(time.Second),
Value: 0,
},
},
},
},
},
// Single sample, query time after the sample.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant.Add(time.Second),
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant,
Value: 0,
},
},
},
},
},
// Two samples, query asks for first sample time.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
{
Metric: metric,
Value: 1,
Timestamp: instant.Add(time.Second),
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant,
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant,
Value: 0,
},
},
},
},
},
// Three samples, query asks for second sample time.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
{
Metric: metric,
Value: 1,
Timestamp: instant.Add(time.Second),
},
{
Metric: metric,
Value: 2,
Timestamp: instant.Add(time.Second * 2),
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant.Add(time.Second),
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant.Add(time.Second),
Value: 1,
},
},
},
},
},
// Three samples, query asks for time between first and second samples.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
{
Metric: metric,
Value: 1,
Timestamp: instant.Add(time.Second * 2),
},
{
Metric: metric,
Value: 2,
Timestamp: instant.Add(time.Second * 4),
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant.Add(time.Second),
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant,
Value: 0,
},
{
Timestamp: instant.Add(time.Second * 2),
Value: 1,
},
},
},
},
},
// Three samples, query asks for time between second and third samples.
{
data: []model.Sample{
{
Metric: metric,
Value: 0,
Timestamp: instant,
},
{
Metric: metric,
Value: 1,
Timestamp: instant.Add(time.Second * 2),
},
{
Metric: metric,
Value: 2,
Timestamp: instant.Add(time.Second * 4),
},
},
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant.Add(time.Second * 3),
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant.Add(time.Second * 2),
Value: 1,
},
{
Timestamp: instant.Add(time.Second * 4),
Value: 2,
},
},
},
},
},
// Two chunks of samples, query asks for values from first chunk.
{
data: buildSamples(instant, instant.Add(time.Duration(*leveldbChunkSize*2)*time.Second), time.Second, metric),
in: in{
atTime: []getValuesAtTimeOp{
{
time: instant.Add(time.Second*time.Duration(*leveldbChunkSize/2) + 1),
},
},
},
out: out{
atTime: [][]model.SamplePair{
{
{
Timestamp: instant.Add(time.Second * time.Duration(*leveldbChunkSize/2)),
Value: 100,
},
{
Timestamp: instant.Add(time.Second * (time.Duration(*leveldbChunkSize/2) + 1)),
Value: 101,
},
},
},
},
},
}
)
for i, scenario := range scenarios {
tiered, closer := newTestTieredStorage(t)
defer closer.Close()
for j, datum := range scenario.data {
err := tiered.AppendSample(datum)
if err != nil {
t.Fatalf("%d.%d. failed to add fixture data: %s", i, j, err)
}
}
tiered.Flush()
requestBuilder := NewViewRequestBuilder()
for _, atTime := range scenario.in.atTime {
requestBuilder.GetMetricAtTime(fingerprint, atTime.time)
}
for _, atInterval := range scenario.in.atInterval {
requestBuilder.GetMetricAtInterval(fingerprint, atInterval.from, atInterval.through, atInterval.interval)
}
for _, alongRange := range scenario.in.alongRange {
requestBuilder.GetMetricRange(fingerprint, alongRange.from, alongRange.through)
}
v, err := tiered.MakeView(requestBuilder, time.Second*5)
if err != nil {
t.Fatalf("%d. failed due to %s", i, err)
}
for j, atTime := range scenario.in.atTime {
actual := v.GetValueAtTime(fingerprint, atTime.time)
if len(actual) != len(scenario.out.atTime[j]) {
t.Fatalf("%d.%d. expected %d output, got %d", i, j, len(scenario.out.atTime[j]), len(actual))
}
for k, value := range scenario.out.atTime[j] {
if value.Value != actual[k].Value {
t.Fatalf("%d.%d.%d expected %v value, got %v", i, j, k, value.Value, actual[k].Value)
}
if !value.Timestamp.Equal(actual[k].Timestamp) {
t.Fatalf("%d.%d.%d expected %s timestamp, got %s", i, j, k, value.Timestamp, actual[k].Timestamp)
}
}
}
tiered.Drain()
}
}
func TestMakeView(t *testing.T) {
testMakeView(t)
}
func BenchmarkMakeView(b *testing.B) {
for i := 0; i < b.N; i++ {
testMakeView(b)
}
}
func TestGetAllValuesForLabel(t *testing.T) {
type in struct {
metricName string
appendToMemory bool
appendToDisk bool
}
scenarios := []struct {
in []in
out []string
}{
{
// Empty case.
}, {
in: []in{
{
metricName: "request_count",
appendToMemory: false,
appendToDisk: true,
},
},
out: []string{
"request_count",
},
}, {
in: []in{
{
metricName: "request_count",
appendToMemory: true,
appendToDisk: false,
},
{
metricName: "start_time",
appendToMemory: false,
appendToDisk: true,
},
},
out: []string{
"request_count",
"start_time",
},
}, {
in: []in{
{
metricName: "request_count",
appendToMemory: true,
appendToDisk: true,
},
{
metricName: "start_time",
appendToMemory: true,
appendToDisk: true,
},
},
out: []string{
"request_count",
"start_time",
},
},
}
for i, scenario := range scenarios {
tiered, closer := newTestTieredStorage(t)
defer closer.Close()
for j, metric := range scenario.in {
sample := model.Sample{
Metric: model.Metric{model.MetricNameLabel: model.LabelValue(metric.metricName)},
}
if metric.appendToMemory {
if err := tiered.(*tieredStorage).memoryArena.AppendSample(sample); err != nil {
t.Fatalf("%d.%d. failed to add fixture data: %s", i, j, err)
}
}
if metric.appendToDisk {
if err := tiered.(*tieredStorage).diskStorage.AppendSample(sample); err != nil {
t.Fatalf("%d.%d. failed to add fixture data: %s", i, j, err)
}
}
}
metricNames, err := tiered.GetAllValuesForLabel(model.MetricNameLabel)
if err != nil {
t.Fatalf("%d. Error getting metric names: %s", i, err)
}
if len(metricNames) != len(scenario.out) {
t.Fatalf("%d. Expected metric count %d, got %d", i, len(scenario.out), len(metricNames))
}
sort.Sort(metricNames)
for j, expected := range scenario.out {
if expected != string(metricNames[j]) {
t.Fatalf("%d.%d. Expected metric %s, got %s", i, j, expected, metricNames[j])
}
}
}
}