file watcher to be used for configuration auto-reload feature (#12301)

* add config watcher to the config package * add logging to watcher * add test and refactor to add WatcherEvent. * add all API calls and fix a bug with recreated files * add tests for watcher * remove the unnecessary use of context * Add debug log and a test for file rename * use inode to detect if the file is recreated/replaced and only listen to create events. * tidy ups (#1535) * tidy ups * Add tests for inode reconcile * fix linux vs windows syscall * fix linux vs windows syscall * fix windows compile error * increase timeout * use ctime ID * remove remove/creation test as it's a use case that fail in linux * fix linux/windows to use Ino/CreationTime * fix the watcher to only overwrite current file id * fix linter error * fix remove/create test * set reconcile loop to 200 Milliseconds * fix watcher to not trigger event on remove, add more tests * on a remove event try to add the file back to the watcher and trigger the handler if success * fix race condition * fix flaky test * fix race conditions * set level to info * fix when file is removed and get an event for it after * fix to trigger handler when we get a remove but re-add fail * fix error message * add tests for directory watch and fixes * detect if a file is a symlink and return an error on Add * rename Watcher to FileWatcher and remove symlink deref * add fsnotify@v1.5.1 * fix go mod * fix flaky test * Apply suggestions from code review Co-authored-by: Ashwin Venkatesh <ashwin@hashicorp.com> * fix a possible stack overflow * do not reset timer on errors, rename OS specific files * start the watcher when creating it * fix data race in tests * rename New func * do not call handler when a remove event happen * events trigger on write and rename * fix watcher tests * make handler async * remove recursive call * do not produce events for sub directories * trim "/" at the end of a directory when adding * add missing test * fix logging * add todo * fix failing test * fix flaking tests * fix flaky test * add logs * fix log text * increase timeout * reconcile when remove * check reconcile when removed * fix reconcile move test * fix logging * delete invalid file * Apply suggestions from code review Co-authored-by: R.B. Boyer <4903+rboyer@users.noreply.github.com> * fix review comments * fix is watched to properly catch a remove * change test timeout * fix test and rename id * fix test to create files with different mod time. * fix deadlock when stopping watcher * Apply suggestions from code review Co-authored-by: R.B. Boyer <4903+rboyer@users.noreply.github.com> * fix a deadlock when calling stop while emitting event is blocked * make sure to close the event channel after the event loop is done * add go doc * back date file instead of sleeping * Apply suggestions from code review Co-authored-by: R.B. Boyer <4903+rboyer@users.noreply.github.com> * check error Co-authored-by: Ashwin Venkatesh <ashwin@hashicorp.com> Co-authored-by: R.B. Boyer <4903+rboyer@users.noreply.github.com>
2022-02-21 11:36:52 -05:00 · 2022-02-21 11:36:52 -05:00 · 378f688a6a
parent 4ad8a0cfef
commit 378f688a6a
4 changed files with 590 additions and 0 deletions
--- a/agent/config/file_watcher.go
+++ b/agent/config/file_watcher.go
@ -0,0 +1,249 @@
+package config
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/hashicorp/go-hclog"
+)
+
+const timeoutDuration = 200 * time.Millisecond
+
+type FileWatcher struct {
+	watcher          *fsnotify.Watcher
+	configFiles      map[string]*watchedFile
+	logger           hclog.Logger
+	reconcileTimeout time.Duration
+	cancel           context.CancelFunc
+	done             chan interface{}
+	stopOnce         sync.Once
+
+	//EventsCh Channel where an event will be emitted when a file change is detected
+	// a call to Start is needed before any event is emitted
+	// after a Call to Stop succeed, the channel will be closed
+	EventsCh chan *FileWatcherEvent
+}
+
+type watchedFile struct {
+	modTime time.Time
+}
+
+type FileWatcherEvent struct {
+	Filename string
+}
+
+//NewFileWatcher create a file watcher that will watch all the files/folders from configFiles
+// if success a FileWatcher will be returned and a nil error
+// otherwise an error and a nil FileWatcher are returned
+func NewFileWatcher(configFiles []string, logger hclog.Logger) (*FileWatcher, error) {
+	ws, err := fsnotify.NewWatcher()
+	if err != nil {
+		return nil, err
+	}
+	w := &FileWatcher{
+		watcher:          ws,
+		logger:           logger.Named("file-watcher"),
+		configFiles:      make(map[string]*watchedFile),
+		EventsCh:         make(chan *FileWatcherEvent),
+		reconcileTimeout: timeoutDuration,
+		done:             make(chan interface{}),
+		stopOnce:         sync.Once{},
+	}
+	for _, f := range configFiles {
+		err = w.add(f)
+		if err != nil {
+			return nil, fmt.Errorf("error adding file %q: %w", f, err)
+		}
+	}
+
+	return w, nil
+}
+
+// Start start a file watcher, with a copy of the passed context.
+// calling Start multiple times is a noop
+func (w *FileWatcher) Start(ctx context.Context) {
+	if w.cancel == nil {
+		cancelCtx, cancel := context.WithCancel(ctx)
+		w.cancel = cancel
+		go w.watch(cancelCtx)
+	}
+}
+
+// Stop the file watcher
+// calling Stop multiple times is a noop, Stop must be called after a Start
+func (w *FileWatcher) Stop() error {
+	var err error
+	w.stopOnce.Do(func() {
+		w.cancel()
+		<-w.done
+		close(w.EventsCh)
+		err = w.watcher.Close()
+	})
+	return err
+}
+
+func (w *FileWatcher) add(filename string) error {
+	if isSymLink(filename) {
+		return fmt.Errorf("symbolic links are not supported %s", filename)
+	}
+	filename = filepath.Clean(filename)
+	w.logger.Trace("adding file", "file", filename)
+	if err := w.watcher.Add(filename); err != nil {
+		return err
+	}
+	modTime, err := w.getFileModifiedTime(filename)
+	if err != nil {
+		return err
+	}
+	w.configFiles[filename] = &watchedFile{modTime: modTime}
+	return nil
+}
+
+func isSymLink(filename string) bool {
+	fi, err := os.Lstat(filename)
+	if err != nil {
+		return false
+	}
+	if fi.Mode()&os.ModeSymlink != 0 {
+		return true
+	}
+	return false
+}
+
+func (w *FileWatcher) watch(ctx context.Context) {
+	ticker := time.NewTicker(w.reconcileTimeout)
+	defer ticker.Stop()
+	defer close(w.done)
+
+	for {
+		select {
+		case event, ok := <-w.watcher.Events:
+			if !ok {
+				w.logger.Error("watcher event channel is closed")
+				return
+			}
+			w.logger.Trace("received watcher event", "event", event)
+			if err := w.handleEvent(ctx, event); err != nil {
+				w.logger.Error("error handling watcher event", "error", err, "event", event)
+			}
+		case _, ok := <-w.watcher.Errors:
+			if !ok {
+				w.logger.Error("watcher error channel is closed")
+				return
+			}
+		case <-ticker.C:
+			w.reconcile(ctx)
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func (w *FileWatcher) handleEvent(ctx context.Context, event fsnotify.Event) error {
+	w.logger.Trace("event received ", "filename", event.Name, "OP", event.Op)
+	// we only want Create and Remove events to avoid triggering a reload on file modification
+	if !isCreateEvent(event) && !isRemoveEvent(event) && !isWriteEvent(event) && !isRenameEvent(event) {
+		return nil
+	}
+	filename := filepath.Clean(event.Name)
+	configFile, basename, ok := w.isWatched(filename)
+	if !ok {
+		return fmt.Errorf("file %s is not watched", event.Name)
+	}
+
+	// we only want to update mod time and re-add if the event is on the watched file itself
+	if filename == basename {
+		if isRemoveEvent(event) {
+			// If the file was removed, try to reconcile and see if anything changed.
+			w.logger.Trace("attempt a reconcile ", "filename", event.Name, "OP", event.Op)
+			configFile.modTime = time.Time{}
+			w.reconcile(ctx)
+		}
+	}
+	if isCreateEvent(event) || isWriteEvent(event) || isRenameEvent(event) {
+		w.logger.Trace("call the handler", "filename", event.Name, "OP", event.Op)
+		select {
+		case w.EventsCh <- &FileWatcherEvent{Filename: filename}:
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+
+	}
+	return nil
+}
+
+func (w *FileWatcher) isWatched(filename string) (*watchedFile, string, bool) {
+	path := filename
+	configFile, ok := w.configFiles[path]
+	if ok {
+		return configFile, path, true
+	}
+
+	stat, err := os.Lstat(filename)
+
+	// if the error is a not exist still try to find if the event for a configured file
+	if os.IsNotExist(err) || (!stat.IsDir() && stat.Mode()&os.ModeSymlink == 0) {
+		w.logger.Trace("not a dir and not a symlink to a dir")
+		// try to see if the watched path is the parent dir
+		newPath := filepath.Dir(path)
+		w.logger.Trace("get dir", "dir", newPath)
+		configFile, ok = w.configFiles[newPath]
+	}
+	return configFile, path, ok
+}
+
+func (w *FileWatcher) reconcile(ctx context.Context) {
+	for filename, configFile := range w.configFiles {
+		w.logger.Trace("reconciling", "filename", filename)
+		newModTime, err := w.getFileModifiedTime(filename)
+		if err != nil {
+			w.logger.Error("failed to get file modTime", "file", filename, "err", err)
+			continue
+		}
+
+		err = w.watcher.Add(filename)
+		if err != nil {
+			w.logger.Error("failed to add file to watcher", "file", filename, "err", err)
+			continue
+		}
+		if !configFile.modTime.Equal(newModTime) {
+			w.logger.Trace("call the handler", "filename", filename, "old modTime", configFile.modTime, "new modTime", newModTime)
+			w.configFiles[filename].modTime = newModTime
+			select {
+			case w.EventsCh <- &FileWatcherEvent{Filename: filename}:
+			case <-ctx.Done():
+				return
+			}
+		}
+	}
+}
+
+func isCreateEvent(event fsnotify.Event) bool {
+	return event.Op&fsnotify.Create == fsnotify.Create
+}
+
+func isRemoveEvent(event fsnotify.Event) bool {
+	return event.Op&fsnotify.Remove == fsnotify.Remove
+}
+
+func isWriteEvent(event fsnotify.Event) bool {
+	return event.Op&fsnotify.Write == fsnotify.Write
+}
+
+func isRenameEvent(event fsnotify.Event) bool {
+	return event.Op&fsnotify.Rename == fsnotify.Rename
+}
+
+func (w *FileWatcher) getFileModifiedTime(filename string) (time.Time, error) {
+	fileInfo, err := os.Stat(filename)
+	if err != nil {
+		return time.Time{}, err
+	}
+
+	return fileInfo.ModTime(), err
+}
--- a/agent/config/file_watcher_test.go
+++ b/agent/config/file_watcher_test.go
@ -0,0 +1,337 @@
+package config
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/hashicorp/go-hclog"
+
+	"github.com/hashicorp/consul/sdk/testutil"
+	"github.com/stretchr/testify/require"
+)
+
+const defaultTimeout = 500 * time.Millisecond
+
+func TestNewWatcher(t *testing.T) {
+	w, err := NewFileWatcher([]string{}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	require.NotNil(t, w)
+}
+
+func TestWatcherRenameEvent(t *testing.T) {
+
+	fileTmp := createTempConfigFile(t, "temp_config3")
+	filepaths := []string{createTempConfigFile(t, "temp_config1"), createTempConfigFile(t, "temp_config2")}
+	w, err := NewFileWatcher(filepaths, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	require.NoError(t, err)
+	err = os.Rename(fileTmp, filepaths[0])
+	require.NoError(t, err)
+	require.NoError(t, assertEvent(filepaths[0], w.EventsCh, defaultTimeout))
+	// make sure we consume all events
+	assertEvent(filepaths[0], w.EventsCh, defaultTimeout)
+}
+
+func TestWatcherAddNotExist(t *testing.T) {
+
+	file := testutil.TempFile(t, "temp_config")
+	filename := file.Name() + randomStr(16)
+	w, err := NewFileWatcher([]string{filename}, hclog.New(&hclog.LoggerOptions{}))
+	require.Error(t, err, "no such file or directory")
+	require.Nil(t, w)
+}
+
+func TestEventWatcherWrite(t *testing.T) {
+
+	file := testutil.TempFile(t, "temp_config")
+	_, err := file.WriteString("test config")
+	require.NoError(t, err)
+	err = file.Sync()
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{file.Name()}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	_, err = file.WriteString("test config 2")
+	require.NoError(t, err)
+	err = file.Sync()
+	require.NoError(t, err)
+	require.NoError(t, assertEvent(file.Name(), w.EventsCh, defaultTimeout))
+}
+
+func TestEventWatcherRead(t *testing.T) {
+
+	filepath := createTempConfigFile(t, "temp_config1")
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	_, err = os.ReadFile(filepath)
+	require.NoError(t, err)
+	require.Error(t, assertEvent(filepath, w.EventsCh, defaultTimeout), "timedout waiting for event")
+}
+
+func TestEventWatcherChmod(t *testing.T) {
+	file := testutil.TempFile(t, "temp_config")
+	defer func() {
+		err := file.Close()
+		require.NoError(t, err)
+	}()
+	_, err := file.WriteString("test config")
+	require.NoError(t, err)
+	err = file.Sync()
+	require.NoError(t, err)
+
+	w, err := NewFileWatcher([]string{file.Name()}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	err = file.Chmod(0777)
+	require.NoError(t, err)
+	require.Error(t, assertEvent(file.Name(), w.EventsCh, defaultTimeout), "timedout waiting for event")
+}
+
+func TestEventWatcherRemoveCreate(t *testing.T) {
+
+	filepath := createTempConfigFile(t, "temp_config1")
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	require.NoError(t, err)
+	err = os.Remove(filepath)
+	require.NoError(t, err)
+	recreated, err := os.Create(filepath)
+	require.NoError(t, err)
+	_, err = recreated.WriteString("config 2")
+	require.NoError(t, err)
+	err = recreated.Sync()
+	require.NoError(t, err)
+	// this an event coming from the reconcile loop
+	require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+}
+
+func TestEventWatcherMove(t *testing.T) {
+
+	filepath := createTempConfigFile(t, "temp_config1")
+
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	for i := 0; i < 10; i++ {
+		filepath2 := createTempConfigFile(t, "temp_config2")
+		err = os.Rename(filepath2, filepath)
+		require.NoError(t, err)
+		require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+	}
+}
+
+func TestEventReconcileMove(t *testing.T) {
+	filepath := createTempConfigFile(t, "temp_config1")
+	filepath2 := createTempConfigFile(t, "temp_config2")
+	err := os.Chtimes(filepath, time.Now(), time.Now().Add(-1*time.Second))
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	// remove the file from the internal watcher to only trigger the reconcile
+	err = w.watcher.Remove(filepath)
+	require.NoError(t, err)
+
+	err = os.Rename(filepath2, filepath)
+	require.NoError(t, err)
+	require.NoError(t, assertEvent(filepath, w.EventsCh, 2000*time.Millisecond))
+}
+
+func TestEventWatcherDirCreateRemove(t *testing.T) {
+	filepath := testutil.TempDir(t, "temp_config1")
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+	for i := 0; i < 1; i++ {
+		name := filepath + "/" + randomStr(20)
+		file, err := os.Create(name)
+		require.NoError(t, err)
+		err = file.Close()
+		require.NoError(t, err)
+		require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+
+		err = os.Remove(name)
+		require.NoError(t, err)
+		require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+	}
+}
+
+func TestEventWatcherDirMove(t *testing.T) {
+	filepath := testutil.TempDir(t, "temp_config1")
+
+	name := filepath + "/" + randomStr(20)
+	file, err := os.Create(name)
+	require.NoError(t, err)
+	err = file.Close()
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	for i := 0; i < 100; i++ {
+		filepathTmp := createTempConfigFile(t, "temp_config2")
+		os.Rename(filepathTmp, name)
+		require.NoError(t, err)
+		require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+	}
+}
+
+func TestEventWatcherDirMoveTrim(t *testing.T) {
+	filepath := testutil.TempDir(t, "temp_config1")
+
+	name := filepath + "/" + randomStr(20)
+	file, err := os.Create(name)
+	require.NoError(t, err)
+	err = file.Close()
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{filepath + "/"}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	for i := 0; i < 100; i++ {
+		filepathTmp := createTempConfigFile(t, "temp_config2")
+		os.Rename(filepathTmp, name)
+		require.NoError(t, err)
+		require.NoError(t, assertEvent(filepath, w.EventsCh, defaultTimeout))
+	}
+}
+
+// Consul do not support configuration in sub-directories
+func TestEventWatcherSubDirMove(t *testing.T) {
+	filepath := testutil.TempDir(t, "temp_config1")
+	err := os.Mkdir(filepath+"/temp", 0777)
+	require.NoError(t, err)
+	name := filepath + "/temp/" + randomStr(20)
+	file, err := os.Create(name)
+	require.NoError(t, err)
+	err = file.Close()
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	defer func() {
+		_ = w.Stop()
+	}()
+
+	for i := 0; i < 2; i++ {
+		filepathTmp := createTempConfigFile(t, "temp_config2")
+		os.Rename(filepathTmp, name)
+		require.NoError(t, err)
+		require.Error(t, assertEvent(filepath, w.EventsCh, defaultTimeout), "timedout waiting for event")
+	}
+}
+
+func TestEventWatcherDirRead(t *testing.T) {
+	filepath := testutil.TempDir(t, "temp_config1")
+
+	name := filepath + "/" + randomStr(20)
+	file, err := os.Create(name)
+	require.NoError(t, err)
+	err = file.Close()
+	require.NoError(t, err)
+	w, err := NewFileWatcher([]string{filepath}, hclog.New(&hclog.LoggerOptions{}))
+	require.NoError(t, err)
+	w.Start(context.Background())
+	t.Cleanup(func() {
+		_ = w.Stop()
+	})
+
+	_, err = os.ReadFile(name)
+	require.NoError(t, err)
+	require.Error(t, assertEvent(filepath, w.EventsCh, defaultTimeout), "timedout waiting for event")
+}
+
+func TestEventWatcherMoveSoftLink(t *testing.T) {
+
+	filepath := createTempConfigFile(t, "temp_config1")
+	tempDir := testutil.TempDir(t, "temp_dir")
+	name := tempDir + "/" + randomStr(20)
+	err := os.Symlink(filepath, name)
+	require.NoError(t, err)
+
+	w, err := NewFileWatcher([]string{name}, hclog.New(&hclog.LoggerOptions{}))
+	require.Error(t, err, "symbolic link are not supported")
+	require.Nil(t, w)
+
+}
+
+func assertEvent(name string, watcherCh chan *FileWatcherEvent, timeout time.Duration) error {
+	select {
+	case ev := <-watcherCh:
+		if ev.Filename != name && !strings.Contains(ev.Filename, name) {
+			return fmt.Errorf("filename do not match %s %s", ev.Filename, name)
+		}
+		return nil
+	case <-time.After(timeout):
+		return fmt.Errorf("timedout waiting for event")
+	}
+}
+
+func createTempConfigFile(t *testing.T, filename string) string {
+	file := testutil.TempFile(t, filename)
+
+	_, err1 := file.WriteString("test config")
+	err2 := file.Close()
+
+	require.NoError(t, err1)
+	require.NoError(t, err2)
+
+	return file.Name()
+}
+
+func randomStr(length int) string {
+	const charset = "abcdefghijklmnopqrstuvwxyz" +
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	var seededRand *rand.Rand = rand.New(
+		rand.NewSource(time.Now().UnixNano()))
+	b := make([]byte, length)
+	for i := range b {
+		b[i] = charset[seededRand.Intn(len(charset))]
+	}
+	return string(b)
+}
--- a/go.mod
+++ b/go.mod
@ -22,6 +22,7 @@ require (
 	github.com/elazarl/go-bindata-assetfs v0.0.0-20160803192304-e1a2a7ec64b0
 	github.com/envoyproxy/go-control-plane v0.9.5
 	github.com/frankban/quicktest v1.11.0 // indirect
+	github.com/fsnotify/fsnotify v1.5.1
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/protobuf v1.3.5
 	github.com/google/go-cmp v0.5.6
--- a/go.sum
+++ b/go.sum
@ -142,6 +142,8 @@ github.com/fatih/structs v1.1.0/go.mod h1:9NiDSp5zOcgEDl+j00MP/WkGVPOlPRLejGD8Ga
 github.com/frankban/quicktest v1.11.0 h1:Yyrghcw93e1jKo4DTZkRFTTFvBsVhzbblBUPNU1vW6Q=
 github.com/frankban/quicktest v1.11.0/go.mod h1:K+q6oSqb0W0Ininfk863uOk1lMy69l/P6txr3mVT54s=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.5.1 h1:mZcQUHVQUQWoPXXtuf9yuEXKudkV2sx1E06UadKWpgI=
+github.com/fsnotify/fsnotify v1.5.1/go.mod h1:T3375wBYaZdLLcVNkcVbzGHY7f1l/uK5T5Ai1i3InKU=
 github.com/ghodss/yaml v0.0.0-20150909031657-73d445a93680/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-asn1-ber/asn1-ber v1.3.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
@ -649,6 +651,7 @@ golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210303074136-134d130e1a04/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210816074244-15123e1e1f71/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211013075003-97ac67df715c h1:taxlMj0D/1sOAuv/CbSD+MMDof2vbyPTqz5FNYKpXt8=
 golang.org/x/sys v0.0.0-20211013075003-97ac67df715c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=