mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
483 lines
12 KiB
Go
483 lines
12 KiB
Go
package logger // import "github.com/docker/docker/daemon/logger"
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import (
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"bytes"
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"encoding/json"
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"io"
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"os"
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"strings"
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"sync"
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"testing"
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"time"
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)
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type TestLoggerJSON struct {
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*json.Encoder
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mu sync.Mutex
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delay time.Duration
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}
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func (l *TestLoggerJSON) Log(m *Message) error {
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if l.delay > 0 {
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time.Sleep(l.delay)
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}
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l.mu.Lock()
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defer l.mu.Unlock()
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return l.Encode(m)
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}
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func (l *TestLoggerJSON) Close() error { return nil }
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func (l *TestLoggerJSON) Name() string { return "json" }
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type TestSizedLoggerJSON struct {
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*json.Encoder
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mu sync.Mutex
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}
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func (l *TestSizedLoggerJSON) Log(m *Message) error {
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l.mu.Lock()
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defer l.mu.Unlock()
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return l.Encode(m)
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}
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func (*TestSizedLoggerJSON) Close() error { return nil }
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func (*TestSizedLoggerJSON) Name() string { return "sized-json" }
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func (*TestSizedLoggerJSON) BufSize() int {
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return 32 * 1024
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}
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func TestCopier(t *testing.T) {
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stdoutLine := "Line that thinks that it is log line from docker stdout"
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stderrLine := "Line that thinks that it is log line from docker stderr"
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stdoutTrailingLine := "stdout trailing line"
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stderrTrailingLine := "stderr trailing line"
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var stdout bytes.Buffer
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var stderr bytes.Buffer
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for i := 0; i < 30; i++ {
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if _, err := stdout.WriteString(stdoutLine + "\n"); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrLine + "\n"); err != nil {
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t.Fatal(err)
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}
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}
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// Test remaining lines without line-endings
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if _, err := stdout.WriteString(stdoutTrailingLine); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrTrailingLine); err != nil {
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t.Fatal(err)
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}
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var jsonBuf bytes.Buffer
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jsonLog := &TestLoggerJSON{Encoder: json.NewEncoder(&jsonBuf)}
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c := NewCopier(
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map[string]io.Reader{
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"stdout": &stdout,
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"stderr": &stderr,
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},
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jsonLog)
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c.Run()
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wait := make(chan struct{})
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go func() {
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c.Wait()
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close(wait)
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}()
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select {
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case <-time.After(1 * time.Second):
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t.Fatal("Copier failed to do its work in 1 second")
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case <-wait:
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}
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dec := json.NewDecoder(&jsonBuf)
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for {
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var msg Message
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if err := dec.Decode(&msg); err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal(err)
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}
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if msg.Source != "stdout" && msg.Source != "stderr" {
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t.Fatalf("Wrong Source: %q, should be %q or %q", msg.Source, "stdout", "stderr")
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}
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if msg.Source == "stdout" {
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if string(msg.Line) != stdoutLine && string(msg.Line) != stdoutTrailingLine {
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t.Fatalf("Wrong Line: %q, expected %q or %q", msg.Line, stdoutLine, stdoutTrailingLine)
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}
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}
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if msg.Source == "stderr" {
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if string(msg.Line) != stderrLine && string(msg.Line) != stderrTrailingLine {
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t.Fatalf("Wrong Line: %q, expected %q or %q", msg.Line, stderrLine, stderrTrailingLine)
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}
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}
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}
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}
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// TestCopierLongLines tests long lines without line breaks
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func TestCopierLongLines(t *testing.T) {
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// Long lines (should be split at "defaultBufSize")
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stdoutLongLine := strings.Repeat("a", defaultBufSize)
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stderrLongLine := strings.Repeat("b", defaultBufSize)
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stdoutTrailingLine := "stdout trailing line"
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stderrTrailingLine := "stderr trailing line"
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var stdout bytes.Buffer
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var stderr bytes.Buffer
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for i := 0; i < 3; i++ {
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if _, err := stdout.WriteString(stdoutLongLine); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrLongLine); err != nil {
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t.Fatal(err)
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}
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}
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if _, err := stdout.WriteString(stdoutTrailingLine); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrTrailingLine); err != nil {
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t.Fatal(err)
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}
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var jsonBuf bytes.Buffer
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jsonLog := &TestLoggerJSON{Encoder: json.NewEncoder(&jsonBuf)}
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c := NewCopier(
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map[string]io.Reader{
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"stdout": &stdout,
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"stderr": &stderr,
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},
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jsonLog)
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c.Run()
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wait := make(chan struct{})
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go func() {
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c.Wait()
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close(wait)
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}()
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select {
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case <-time.After(1 * time.Second):
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t.Fatal("Copier failed to do its work in 1 second")
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case <-wait:
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}
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dec := json.NewDecoder(&jsonBuf)
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for {
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var msg Message
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if err := dec.Decode(&msg); err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal(err)
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}
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if msg.Source != "stdout" && msg.Source != "stderr" {
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t.Fatalf("Wrong Source: %q, should be %q or %q", msg.Source, "stdout", "stderr")
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}
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if msg.Source == "stdout" {
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if string(msg.Line) != stdoutLongLine && string(msg.Line) != stdoutTrailingLine {
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t.Fatalf("Wrong Line: %q, expected 'stdoutLongLine' or 'stdoutTrailingLine'", msg.Line)
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}
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}
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if msg.Source == "stderr" {
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if string(msg.Line) != stderrLongLine && string(msg.Line) != stderrTrailingLine {
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t.Fatalf("Wrong Line: %q, expected 'stderrLongLine' or 'stderrTrailingLine'", msg.Line)
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}
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}
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}
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}
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func TestCopierSlow(t *testing.T) {
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stdoutLine := "Line that thinks that it is log line from docker stdout"
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var stdout bytes.Buffer
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for i := 0; i < 30; i++ {
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if _, err := stdout.WriteString(stdoutLine + "\n"); err != nil {
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t.Fatal(err)
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}
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}
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var jsonBuf bytes.Buffer
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// encoder := &encodeCloser{Encoder: json.NewEncoder(&jsonBuf)}
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jsonLog := &TestLoggerJSON{Encoder: json.NewEncoder(&jsonBuf), delay: 100 * time.Millisecond}
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c := NewCopier(map[string]io.Reader{"stdout": &stdout}, jsonLog)
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c.Run()
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wait := make(chan struct{})
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go func() {
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c.Wait()
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close(wait)
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}()
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<-time.After(150 * time.Millisecond)
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c.Close()
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select {
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case <-time.After(200 * time.Millisecond):
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t.Fatal("failed to exit in time after the copier is closed")
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case <-wait:
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}
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}
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func TestCopierWithSized(t *testing.T) {
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var jsonBuf bytes.Buffer
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expectedMsgs := 2
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sizedLogger := &TestSizedLoggerJSON{Encoder: json.NewEncoder(&jsonBuf)}
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logbuf := bytes.NewBufferString(strings.Repeat(".", sizedLogger.BufSize()*expectedMsgs))
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c := NewCopier(map[string]io.Reader{"stdout": logbuf}, sizedLogger)
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c.Run()
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// Wait for Copier to finish writing to the buffered logger.
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c.Wait()
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c.Close()
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recvdMsgs := 0
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dec := json.NewDecoder(&jsonBuf)
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for {
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var msg Message
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if err := dec.Decode(&msg); err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal(err)
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}
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if msg.Source != "stdout" {
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t.Fatalf("Wrong Source: %q, should be %q", msg.Source, "stdout")
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}
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if len(msg.Line) != sizedLogger.BufSize() {
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t.Fatalf("Line was not of expected max length %d, was %d", sizedLogger.BufSize(), len(msg.Line))
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}
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recvdMsgs++
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}
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if recvdMsgs != expectedMsgs {
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t.Fatalf("expected to receive %d messages, actually received %d", expectedMsgs, recvdMsgs)
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}
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}
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func checkIdentical(t *testing.T, msg Message, expectedID string, expectedTS time.Time) {
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if msg.PLogMetaData.ID != expectedID {
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t.Fatalf("IDs are not he same across partials. Expected: %s Received: %s",
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expectedID, msg.PLogMetaData.ID)
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}
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if msg.Timestamp != expectedTS {
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t.Fatalf("Timestamps are not the same across partials. Expected: %v Received: %v",
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expectedTS.Format(time.UnixDate), msg.Timestamp.Format(time.UnixDate))
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}
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}
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// Have long lines and make sure that it comes out with PartialMetaData
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func TestCopierWithPartial(t *testing.T) {
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stdoutLongLine := strings.Repeat("a", defaultBufSize)
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stderrLongLine := strings.Repeat("b", defaultBufSize)
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stdoutTrailingLine := "stdout trailing line"
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stderrTrailingLine := "stderr trailing line"
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normalStr := "This is an impartial message :)"
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var stdout bytes.Buffer
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var stderr bytes.Buffer
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var normalMsg bytes.Buffer
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for i := 0; i < 3; i++ {
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if _, err := stdout.WriteString(stdoutLongLine); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrLongLine); err != nil {
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t.Fatal(err)
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}
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}
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if _, err := stdout.WriteString(stdoutTrailingLine + "\n"); err != nil {
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t.Fatal(err)
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}
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if _, err := stderr.WriteString(stderrTrailingLine + "\n"); err != nil {
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t.Fatal(err)
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}
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if _, err := normalMsg.WriteString(normalStr + "\n"); err != nil {
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t.Fatal(err)
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}
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var jsonBuf bytes.Buffer
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jsonLog := &TestLoggerJSON{Encoder: json.NewEncoder(&jsonBuf)}
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c := NewCopier(
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map[string]io.Reader{
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"stdout": &stdout,
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"normal": &normalMsg,
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"stderr": &stderr,
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},
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jsonLog)
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c.Run()
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wait := make(chan struct{})
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go func() {
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c.Wait()
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close(wait)
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}()
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select {
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case <-time.After(1 * time.Second):
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t.Fatal("Copier failed to do its work in 1 second")
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case <-wait:
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}
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dec := json.NewDecoder(&jsonBuf)
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expectedMsgs := 9
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recvMsgs := 0
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var expectedPartID1, expectedPartID2 string
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var expectedTS1, expectedTS2 time.Time
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for {
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var msg Message
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if err := dec.Decode(&msg); err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal(err)
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}
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if msg.Source != "stdout" && msg.Source != "stderr" && msg.Source != "normal" {
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t.Fatalf("Wrong Source: %q, should be %q or %q or %q", msg.Source, "stdout", "stderr", "normal")
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}
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if msg.Source == "stdout" {
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if string(msg.Line) != stdoutLongLine && string(msg.Line) != stdoutTrailingLine {
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t.Fatalf("Wrong Line: %q, expected 'stdoutLongLine' or 'stdoutTrailingLine'", msg.Line)
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}
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if msg.PLogMetaData.ID == "" {
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t.Fatalf("Expected partial metadata. Got nothing")
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}
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if msg.PLogMetaData.Ordinal == 1 {
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expectedPartID1 = msg.PLogMetaData.ID
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expectedTS1 = msg.Timestamp
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} else {
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checkIdentical(t, msg, expectedPartID1, expectedTS1)
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}
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if msg.PLogMetaData.Ordinal == 4 && !msg.PLogMetaData.Last {
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t.Fatalf("Last is not set for last chunk")
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}
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}
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if msg.Source == "stderr" {
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if string(msg.Line) != stderrLongLine && string(msg.Line) != stderrTrailingLine {
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t.Fatalf("Wrong Line: %q, expected 'stderrLongLine' or 'stderrTrailingLine'", msg.Line)
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}
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if msg.PLogMetaData.ID == "" {
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t.Fatalf("Expected partial metadata. Got nothing")
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}
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if msg.PLogMetaData.Ordinal == 1 {
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expectedPartID2 = msg.PLogMetaData.ID
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expectedTS2 = msg.Timestamp
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} else {
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checkIdentical(t, msg, expectedPartID2, expectedTS2)
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}
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if msg.PLogMetaData.Ordinal == 4 && !msg.PLogMetaData.Last {
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t.Fatalf("Last is not set for last chunk")
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}
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}
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if msg.Source == "normal" && msg.PLogMetaData != nil {
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t.Fatalf("Normal messages should not have PartialLogMetaData")
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}
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recvMsgs++
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}
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if expectedMsgs != recvMsgs {
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t.Fatalf("Expected msgs: %d Recv msgs: %d", expectedMsgs, recvMsgs)
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}
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}
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type BenchmarkLoggerDummy struct {
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}
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func (l *BenchmarkLoggerDummy) Log(m *Message) error { PutMessage(m); return nil }
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func (l *BenchmarkLoggerDummy) Close() error { return nil }
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func (l *BenchmarkLoggerDummy) Name() string { return "dummy" }
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func BenchmarkCopier64(b *testing.B) {
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benchmarkCopier(b, 1<<6)
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}
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func BenchmarkCopier128(b *testing.B) {
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benchmarkCopier(b, 1<<7)
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}
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func BenchmarkCopier256(b *testing.B) {
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benchmarkCopier(b, 1<<8)
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}
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func BenchmarkCopier512(b *testing.B) {
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benchmarkCopier(b, 1<<9)
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}
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func BenchmarkCopier1K(b *testing.B) {
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benchmarkCopier(b, 1<<10)
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}
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func BenchmarkCopier2K(b *testing.B) {
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benchmarkCopier(b, 1<<11)
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}
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func BenchmarkCopier4K(b *testing.B) {
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benchmarkCopier(b, 1<<12)
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}
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func BenchmarkCopier8K(b *testing.B) {
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benchmarkCopier(b, 1<<13)
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}
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func BenchmarkCopier16K(b *testing.B) {
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benchmarkCopier(b, 1<<14)
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}
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func BenchmarkCopier32K(b *testing.B) {
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benchmarkCopier(b, 1<<15)
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}
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func BenchmarkCopier64K(b *testing.B) {
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benchmarkCopier(b, 1<<16)
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}
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func BenchmarkCopier128K(b *testing.B) {
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benchmarkCopier(b, 1<<17)
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}
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func BenchmarkCopier256K(b *testing.B) {
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benchmarkCopier(b, 1<<18)
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}
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func piped(b *testing.B, iterations int, delay time.Duration, buf []byte) io.Reader {
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r, w, err := os.Pipe()
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if err != nil {
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b.Fatal(err)
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return nil
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}
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go func() {
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for i := 0; i < iterations; i++ {
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time.Sleep(delay)
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if n, err := w.Write(buf); err != nil || n != len(buf) {
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if err != nil {
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b.Error(err)
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}
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b.Error("short write")
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}
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}
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w.Close()
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}()
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return r
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}
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func benchmarkCopier(b *testing.B, length int) {
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b.StopTimer()
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buf := []byte{'A'}
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for len(buf) < length {
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buf = append(buf, buf...)
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}
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buf = append(buf[:length-1], []byte{'\n'}...)
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b.StartTimer()
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for i := 0; i < b.N; i++ {
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c := NewCopier(
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map[string]io.Reader{
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"buffer": piped(b, 10, time.Nanosecond, buf),
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},
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&BenchmarkLoggerDummy{})
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c.Run()
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c.Wait()
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c.Close()
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}
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}
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