remove ioutil in kubelet

pkg/kubelet/cm/pod_container_manager_linux.go

@@ -19,13 +19,12 @@ package cm
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
 
 	libcontainercgroups "github.com/opencontainers/runc/libcontainer/cgroups"
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/types"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -240,7 +239,7 @@ func (m *podContainerManagerImpl) GetAllPodsFromCgroups() (map[types.UID]CgroupN
 			// get the subsystems QoS cgroup absolute name
 			qcConversion := m.cgroupManager.Name(qosContainerName)
 			qc := path.Join(val, qcConversion)
-			dirInfo, err := ioutil.ReadDir(qc)
+			dirInfo, err := os.ReadDir(qc)
 			if err != nil {
 				if os.IsNotExist(err) {
 					continue

pkg/kubelet/kubelet_getters.go

@@ -19,8 +19,8 @@ package kubelet
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"net"
+	"os"
 	"path/filepath"
 
 	cadvisorapiv1 "github.com/google/cadvisor/info/v1"
@@ -301,7 +301,7 @@ func (kl *Kubelet) getPodVolumePathListFromDisk(podUID types.UID) ([]string, err
 		return volumes, nil
 	}
 
-	volumePluginDirs, err := ioutil.ReadDir(podVolDir)
+	volumePluginDirs, err := os.ReadDir(podVolDir)
 	if err != nil {
 		klog.ErrorS(err, "Could not read directory", "path", podVolDir)
 		return volumes, err
@@ -370,15 +370,15 @@ func (kl *Kubelet) getPodVolumeSubpathListFromDisk(podUID types.UID) ([]string,
 	}
 
 	// Explicitly walks /<volume>/<container name>/<subPathIndex>
-	volumePluginDirs, err := ioutil.ReadDir(podSubpathsDir)
+	volumePluginDirs, err := os.ReadDir(podSubpathsDir)
 	if err != nil {
 		klog.ErrorS(err, "Could not read directory", "path", podSubpathsDir)
 		return volumes, err
 	}
 	for _, volumePluginDir := range volumePluginDirs {
 		volumePluginName := volumePluginDir.Name()
 		volumePluginPath := filepath.Join(podSubpathsDir, volumePluginName)
-		containerDirs, err := ioutil.ReadDir(volumePluginPath)
+		containerDirs, err := os.ReadDir(volumePluginPath)
 		if err != nil {
 			return volumes, fmt.Errorf("could not read directory %s: %v", volumePluginPath, err)
 		}

pkg/kubelet/kubelet_pods.go

@@ -80,7 +80,7 @@ const (
 
 // Get a list of pods that have data directories.
 func (kl *Kubelet) listPodsFromDisk() ([]types.UID, error) {
-	podInfos, err := ioutil.ReadDir(kl.getPodsDir())
+	podInfos, err := os.ReadDir(kl.getPodsDir())
 	if err != nil {
 		return nil, err
 	}

pkg/kubelet/kubelet_volumes.go

@@ -18,7 +18,7 @@ package kubelet
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"syscall"
 
@@ -209,7 +209,7 @@ func (kl *Kubelet) cleanupOrphanedPodDirs(pods []*v1.Pod, runningPods []*kubecon
 
 		// Call RemoveAllOneFilesystem for remaining subdirs under the pod directory
 		podDir := kl.getPodDir(uid)
-		podSubdirs, err := ioutil.ReadDir(podDir)
+		podSubdirs, err := os.ReadDir(podDir)
 		if err != nil {
 			klog.ErrorS(err, "Could not read directory", "path", podDir)
 			orphanRemovalErrors = append(orphanRemovalErrors, fmt.Errorf("orphaned pod %q found, but error occurred during reading the pod dir from disk: %v", uid, err))

pkg/kubelet/kubelet_volumes_linux_test.go

@@ -35,15 +35,15 @@ import (
 )
 
 func validateDirExists(dir string) error {
-	_, err := ioutil.ReadDir(dir)
+	_, err := os.ReadDir(dir)
 	if err != nil {
 		return err
 	}
 	return nil
 }
 
 func validateDirNotExists(dir string) error {
-	_, err := ioutil.ReadDir(dir)
+	_, err := os.ReadDir(dir)
 	if os.IsNotExist(err) {
 		return nil
 	}

pkg/kubelet/kuberuntime/kuberuntime_container.go

@@ -21,7 +21,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"net/url"
 	"os"
@@ -139,7 +138,7 @@ func calcRestartCountByLogDir(path string) (int, error) {
 		return 0, nil
 	}
 	restartCount := int(0)
-	files, err := ioutil.ReadDir(path)
+	files, err := os.ReadDir(path)
 	if err != nil {
 		return 0, err
 	}

pkg/kubelet/logs/container_log_manager_test.go

@@ -151,7 +151,7 @@ func TestRotateLogs(t *testing.T) {
 	require.NoError(t, c.rotateLogs())
 
 	timestamp := now.Format(timestampFormat)
-	logs, err := ioutil.ReadDir(dir)
+	logs, err := os.ReadDir(dir)
 	require.NoError(t, err)
 	assert.Len(t, logs, 5)
 	assert.Equal(t, testLogs[0], logs[0].Name())
@@ -223,7 +223,7 @@ func TestClean(t *testing.T) {
 	err = c.Clean("container-3")
 	require.NoError(t, err)
 
-	logs, err := ioutil.ReadDir(dir)
+	logs, err := os.ReadDir(dir)
 	require.NoError(t, err)
 	assert.Len(t, logs, 4)
 	assert.Equal(t, testLogs[0], logs[0].Name())
@@ -259,7 +259,7 @@ func TestCleanupUnusedLog(t *testing.T) {
 	assert.Len(t, got, 2)
 	assert.Equal(t, []string{testLogs[0], testLogs[3]}, got)
 
-	logs, err := ioutil.ReadDir(dir)
+	logs, err := os.ReadDir(dir)
 	require.NoError(t, err)
 	assert.Len(t, logs, 2)
 	assert.Equal(t, testLogs[0], filepath.Join(dir, logs[0].Name()))
@@ -309,7 +309,7 @@ func TestRemoveExcessLog(t *testing.T) {
 			assert.Equal(t, name, filepath.Base(got[i]))
 		}
 
-		logs, err := ioutil.ReadDir(dir)
+		logs, err := os.ReadDir(dir)
 		require.NoError(t, err)
 		require.Len(t, logs, len(test.expect))
 		for i, name := range test.expect {

pkg/kubelet/volumemanager/reconciler/reconciler.go

@@ -22,7 +22,7 @@ package reconciler
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io/fs"
 	"os"
 	"path"
 	"path/filepath"
@@ -669,7 +669,7 @@ func (rc *reconciler) updateStates(volumesNeedUpdate map[v1.UniqueVolumeName]*re
 // It returns a list of pod volume information including pod's uid, volume's plugin name, mount path,
 // and volume spec name.
 func getVolumesFromPodDir(podDir string) ([]podVolume, error) {
-	podsDirInfo, err := ioutil.ReadDir(podDir)
+	podsDirInfo, err := os.ReadDir(podDir)
 	if err != nil {
 		return nil, err
 	}
@@ -691,8 +691,8 @@ func getVolumesFromPodDir(podDir string) ([]podVolume, error) {
 		volumesDirs[v1.PersistentVolumeBlock] = path.Join(podDir, config.DefaultKubeletVolumeDevicesDirName)
 
 		for volumeMode, volumesDir := range volumesDirs {
-			var volumesDirInfo []os.FileInfo
-			if volumesDirInfo, err = ioutil.ReadDir(volumesDir); err != nil {
+			var volumesDirInfo []fs.DirEntry
+			if volumesDirInfo, err = os.ReadDir(volumesDir); err != nil {
 				// Just skip the loop because given volumesDir doesn't exist depending on volumeMode
 				continue
 			}