kubernetes metrics_test 源码
kubernetes metrics_test 代码
文件路径:/staging/src/k8s.io/client-go/util/workqueue/metrics_test.go
/*
Copyright 2018 The Kubernetes 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 workqueue
import (
"sync"
"testing"
"time"
testingclock "k8s.io/utils/clock/testing"
)
type testMetrics struct {
added, gotten, finished int64
updateCalled chan<- struct{}
}
func (m *testMetrics) add(item t) { m.added++ }
func (m *testMetrics) get(item t) { m.gotten++ }
func (m *testMetrics) done(item t) { m.finished++ }
func (m *testMetrics) updateUnfinishedWork() { m.updateCalled <- struct{}{} }
func TestMetricShutdown(t *testing.T) {
ch := make(chan struct{})
m := &testMetrics{
updateCalled: ch,
}
c := testingclock.NewFakeClock(time.Now())
q := newQueue(c, m, time.Millisecond)
for !c.HasWaiters() {
// Wait for the go routine to call NewTicker()
time.Sleep(time.Millisecond)
}
c.Step(time.Millisecond)
<-ch
q.ShutDown()
c.Step(time.Hour)
select {
default:
return
case <-ch:
t.Errorf("Unexpected update after shutdown was called.")
}
}
type testMetric struct {
inc int64
dec int64
set float64
observedValue float64
observedCount int
notifyCh chan<- struct{}
lock sync.Mutex
}
func (m *testMetric) Inc() {
m.lock.Lock()
defer m.lock.Unlock()
m.inc++
m.notify()
}
func (m *testMetric) Dec() {
m.lock.Lock()
defer m.lock.Unlock()
m.dec++
m.notify()
}
func (m *testMetric) Set(f float64) {
m.lock.Lock()
defer m.lock.Unlock()
m.set = f
m.notify()
}
func (m *testMetric) Observe(f float64) {
m.lock.Lock()
defer m.lock.Unlock()
m.observedValue = f
m.observedCount++
m.notify()
}
func (m *testMetric) gaugeValue() float64 {
m.lock.Lock()
defer m.lock.Unlock()
if m.set != 0 {
return m.set
}
return float64(m.inc - m.dec)
}
func (m *testMetric) observationValue() float64 {
m.lock.Lock()
defer m.lock.Unlock()
return m.observedValue
}
func (m *testMetric) observationCount() int {
m.lock.Lock()
defer m.lock.Unlock()
return m.observedCount
}
func (m *testMetric) notify() {
if m.notifyCh != nil {
m.notifyCh <- struct{}{}
}
}
type testMetricsProvider struct {
depth testMetric
adds testMetric
latency testMetric
duration testMetric
unfinished testMetric
longest testMetric
retries testMetric
}
func (m *testMetricsProvider) NewDepthMetric(name string) GaugeMetric {
return &m.depth
}
func (m *testMetricsProvider) NewAddsMetric(name string) CounterMetric {
return &m.adds
}
func (m *testMetricsProvider) NewLatencyMetric(name string) HistogramMetric {
return &m.latency
}
func (m *testMetricsProvider) NewWorkDurationMetric(name string) HistogramMetric {
return &m.duration
}
func (m *testMetricsProvider) NewUnfinishedWorkSecondsMetric(name string) SettableGaugeMetric {
return &m.unfinished
}
func (m *testMetricsProvider) NewLongestRunningProcessorSecondsMetric(name string) SettableGaugeMetric {
return &m.longest
}
func (m *testMetricsProvider) NewRetriesMetric(name string) CounterMetric {
return &m.retries
}
func TestMetrics(t *testing.T) {
mp := testMetricsProvider{}
t0 := time.Unix(0, 0)
c := testingclock.NewFakeClock(t0)
mf := queueMetricsFactory{metricsProvider: &mp}
m := mf.newQueueMetrics("test", c)
q := newQueue(c, m, time.Millisecond)
defer q.ShutDown()
for !c.HasWaiters() {
// Wait for the go routine to call NewTicker()
time.Sleep(time.Millisecond)
}
q.Add("foo")
if e, a := 1.0, mp.adds.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := 1.0, mp.depth.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
c.Step(50 * time.Microsecond)
// Start processing
i, _ := q.Get()
if i != "foo" {
t.Errorf("Expected %v, got %v", "foo", i)
}
if e, a := 5e-05, mp.latency.observationValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := 1, mp.latency.observationCount(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// Add it back while processing; multiple adds of the same item are
// de-duped.
q.Add(i)
q.Add(i)
q.Add(i)
q.Add(i)
q.Add(i)
if e, a := 2.0, mp.adds.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// One thing remains in the queue
if e, a := 1.0, mp.depth.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
c.Step(25 * time.Microsecond)
// Finish it up
q.Done(i)
if e, a := 2.5e-05, mp.duration.observationValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := 1, mp.duration.observationCount(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// One thing remains in the queue
if e, a := 1.0, mp.depth.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// It should be back on the queue
i, _ = q.Get()
if i != "foo" {
t.Errorf("Expected %v, got %v", "foo", i)
}
if e, a := 2.5e-05, mp.latency.observationValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := 2, mp.latency.observationCount(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// use a channel to ensure we don't look at the metric before it's
// been set.
ch := make(chan struct{}, 1)
longestCh := make(chan struct{}, 1)
mp.unfinished.notifyCh = ch
mp.longest.notifyCh = longestCh
c.Step(time.Millisecond)
<-ch
mp.unfinished.notifyCh = nil
if e, a := .001, mp.unfinished.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
<-longestCh
mp.longest.notifyCh = nil
if e, a := .001, mp.longest.gaugeValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
// Finish that one up
q.Done(i)
if e, a := .001, mp.duration.observationValue(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
if e, a := 2, mp.duration.observationCount(); e != a {
t.Errorf("expected %v, got %v", e, a)
}
}
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