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replace filepath.Walk with filepath.WalkDir in doCleanSubPaths

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This commit is contained in:
Monokaix 2022-01-20 17:14:43 +08:00
parent df21ff86eb
commit 96702a89b2
1 changed files with 6 additions and 1 deletions
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7
pkg/volume/util/subpath/subpath_linux.go
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@ -260,7 +260,12 @@ func doCleanSubPaths(mounter mount.Interface, podDir string, volumeName string)
// scan /var/lib/kubelet/pods/<uid>/volume-subpaths/<volume>/<container name>/*
fullContainerDirPath := filepath.Join(subPathDir, containerDir.Name())
err = filepath.Walk(fullContainerDirPath, func(path string, info os.FileInfo, _ error) error {
// The original traversal method here was ReadDir, which was not so robust to handle some error such as "stale NFS file handle",
// so it was replaced with filepath.Walk in a later patch, which can pass through error and handled by the callback WalkFunc.
// After go 1.16, WalkDir was introduced, it's more effective than Walk because the callback WalkDirFunc is called before
// reading a directory, making it save some time when a container's subPath contains lots of dirs.
// See https://github.com/kubernetes/kubernetes/pull/71804 and https://github.com/kubernetes/kubernetes/issues/107667 for more details.
err = filepath.WalkDir(fullContainerDirPath, func(path string, info os.DirEntry, _ error) error {
if path == fullContainerDirPath {
// Skip top level directory
return nil