Remove ioutil in kubelet and its tests

Signed-off-by: inosato <si17_21@yahoo.co.jp>

cmd/kubeadm/app/phases/kubelet/config_test.go

@@ -18,7 +18,7 @@ package kubelet
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"testing"
@@ -84,17 +84,17 @@ func TestApplyKubeletConfigPatches(t *testing.T) {
 		expectedOutput = []byte("bar: 1\nfoo: 0\n")
 	)
 
-	dir, err := ioutil.TempDir("", "patches")
+	dir, err := os.MkdirTemp("", "patches")
 	if err != nil {
 		t.Fatalf("could not create temp dir: %v", err)
 	}
 	defer os.RemoveAll(dir)
 
-	if err := ioutil.WriteFile(filepath.Join(dir, "kubeletconfiguration.yaml"), patch, 0644); err != nil {
+	if err := os.WriteFile(filepath.Join(dir, "kubeletconfiguration.yaml"), patch, 0644); err != nil {
 		t.Fatalf("could not write patch file: %v", err)
 	}
 
-	output, err := applyKubeletConfigPatches(input, dir, ioutil.Discard)
+	output, err := applyKubeletConfigPatches(input, dir, io.Discard)
 	if err != nil {
 		t.Fatalf("could not apply patch: %v", err)
 	}

pkg/kubelet/certificate/bootstrap/bootstrap_test.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"testing"
@@ -101,11 +100,11 @@ users:
     client-key: mycertvalid.key
 
 `)
-	filevalid, err := ioutil.TempFile(fileDir, "kubeconfigvalid")
+	filevalid, err := os.CreateTemp(fileDir, "kubeconfigvalid")
 	if err != nil {
 		t.Fatal(err)
 	}
-	ioutil.WriteFile(filevalid.Name(), testDataValid, os.FileMode(0755))
+	os.WriteFile(filevalid.Name(), testDataValid, os.FileMode(0755))
 
 	testDataInvalid := []byte(`
 apiVersion: v1
@@ -141,11 +140,11 @@ users:
     client-key: mycertinvalid.key
 
 `)
-	fileinvalid, err := ioutil.TempFile(fileDir, "kubeconfiginvalid")
+	fileinvalid, err := os.CreateTemp(fileDir, "kubeconfiginvalid")
 	if err != nil {
 		t.Fatal(err)
 	}
-	ioutil.WriteFile(fileinvalid.Name(), testDataInvalid, os.FileMode(0755))
+	os.WriteFile(fileinvalid.Name(), testDataInvalid, os.FileMode(0755))
 
 	testDatabootstrap := []byte(`
 apiVersion: v1
@@ -178,13 +177,13 @@ users:
   user:
    token: mytoken-b
 `)
-	fileboot, err := ioutil.TempFile(fileDir, "kubeconfig")
+	fileboot, err := os.CreateTemp(fileDir, "kubeconfig")
 	if err != nil {
 		t.Fatal(err)
 	}
-	ioutil.WriteFile(fileboot.Name(), testDatabootstrap, os.FileMode(0755))
+	os.WriteFile(fileboot.Name(), testDatabootstrap, os.FileMode(0755))
 
-	dir, err := ioutil.TempDir(fileDir, "k8s-test-certstore-current")
+	dir, err := os.MkdirTemp(fileDir, "k8s-test-certstore-current")
 	if err != nil {
 		t.Fatalf("Unable to create the test directory %q: %v", dir, err)
 	}
@@ -316,12 +315,12 @@ users:
   user:
     token: mytoken-b
 `)
-	f, err := ioutil.TempFile("", "kubeconfig")
+	f, err := os.CreateTemp("", "kubeconfig")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer os.Remove(f.Name())
-	ioutil.WriteFile(f.Name(), testData, os.FileMode(0755))
+	os.WriteFile(f.Name(), testData, os.FileMode(0755))
 
 	config, err := loadRESTClientConfig(f.Name())
 	if err != nil {

pkg/kubelet/cm/cgroup_manager_linux.go

@@ -19,7 +19,6 @@ package cm
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -320,7 +319,7 @@ func getCpuWeight(cpuShares *uint64) uint64 {
 
 // readUnifiedControllers reads the controllers available at the specified cgroup
 func readUnifiedControllers(path string) (sets.String, error) {
-	controllersFileContent, err := ioutil.ReadFile(filepath.Join(path, "cgroup.controllers"))
+	controllersFileContent, err := os.ReadFile(filepath.Join(path, "cgroup.controllers"))
 	if err != nil {
 		return nil, err
 	}

pkg/kubelet/cm/container_manager_linux.go

@@ -22,7 +22,6 @@ package cm
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
@@ -204,7 +203,7 @@ func NewContainerManager(mountUtil mount.Interface, cadvisorInterface cadvisor.I
 	if failSwapOn {
 		// Check whether swap is enabled. The Kubelet does not support running with swap enabled.
 		swapFile := "/proc/swaps"
-		swapData, err := ioutil.ReadFile(swapFile)
+		swapData, err := os.ReadFile(swapFile)
 		if err != nil {
 			if os.IsNotExist(err) {
 				klog.InfoS("File does not exist, assuming that swap is disabled", "path", swapFile)

pkg/kubelet/cm/container_manager_linux_test.go

@@ -21,7 +21,6 @@ package cm
 
 import (
 	"errors"
-	"io/ioutil"
 	"os"
 	"path"
 	"testing"
@@ -148,11 +147,11 @@ func TestSoftRequirementsValidationSuccess(t *testing.T) {
 		t.Skip("skipping cgroup v1 test on a cgroup v2 system")
 	}
 	req := require.New(t)
-	tempDir, err := ioutil.TempDir("", "")
+	tempDir, err := os.MkdirTemp("", "")
 	req.NoError(err)
 	defer os.RemoveAll(tempDir)
-	req.NoError(ioutil.WriteFile(path.Join(tempDir, "cpu.cfs_period_us"), []byte("0"), os.ModePerm))
+	req.NoError(os.WriteFile(path.Join(tempDir, "cpu.cfs_period_us"), []byte("0"), os.ModePerm))
-	req.NoError(ioutil.WriteFile(path.Join(tempDir, "cpu.cfs_quota_us"), []byte("0"), os.ModePerm))
+	req.NoError(os.WriteFile(path.Join(tempDir, "cpu.cfs_quota_us"), []byte("0"), os.ModePerm))
 	mountInt := mount.NewFakeMounter(
 		[]mount.MountPoint{
 			{

pkg/kubelet/cm/cpumanager/cpu_manager_test.go

@@ -18,15 +18,13 @@ package cpumanager
 
 import (
 	"fmt"
+	"os"
 	"reflect"
 	"strconv"
 	"strings"
 	"testing"
 	"time"
 
-	"io/ioutil"
-	"os"
-
 	cadvisorapi "github.com/google/cadvisor/info/v1"
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
@@ -629,7 +627,7 @@ func TestCPUManagerGenerate(t *testing.T) {
 			if testCase.isTopologyBroken {
 				machineInfo = &cadvisorapi.MachineInfo{}
 			}
-			sDir, err := ioutil.TempDir("/tmp/", "cpu_manager_test")
+			sDir, err := os.MkdirTemp("/tmp/", "cpu_manager_test")
 			if err != nil {
 				t.Errorf("cannot create state file: %s", err.Error())
 			}
@@ -1349,7 +1347,7 @@ func TestCPUManagerHandlePolicyOptions(t *testing.T) {
 		t.Run(testCase.description, func(t *testing.T) {
 			machineInfo := &mockedMachineInfo
 			nodeAllocatableReservation := v1.ResourceList{}
-			sDir, err := ioutil.TempDir("/tmp/", "cpu_manager_test")
+			sDir, err := os.MkdirTemp("/tmp/", "cpu_manager_test")
 			if err != nil {
 				t.Errorf("cannot create state file: %s", err.Error())
 			}

pkg/kubelet/cm/cpumanager/state/state_checkpoint_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package state
 
 import (
-	"io/ioutil"
 	"os"
 	"reflect"
 	"strings"
@@ -201,7 +200,7 @@ func TestCheckpointStateRestore(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "cpumanager_state_test")
+	testingDir, err := os.MkdirTemp("", "cpumanager_state_test")
 	require.NoError(t, err)
 	defer os.RemoveAll(testingDir)
 	// create checkpoint manager for testing
@@ -258,7 +257,7 @@ func TestCheckpointStateStore(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "cpumanager_state_test")
+	testingDir, err := os.MkdirTemp("", "cpumanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -331,7 +330,7 @@ func TestCheckpointStateHelpers(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "cpumanager_state_test")
+	testingDir, err := os.MkdirTemp("", "cpumanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -390,7 +389,7 @@ func TestCheckpointStateClear(t *testing.T) {
 	for _, tc := range testCases {
 		t.Run(tc.description, func(t *testing.T) {
 			// create temp dir
-			testingDir, err := ioutil.TempDir("", "cpumanager_state_test")
+			testingDir, err := os.MkdirTemp("", "cpumanager_state_test")
 			if err != nil {
 				t.Fatal(err)
 			}

pkg/kubelet/cm/devicemanager/manager_test.go

@@ -18,7 +18,6 @@ package devicemanager
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -78,7 +77,7 @@ func (m *wrappedManagerImpl) PluginListAndWatchReceiver(r string, resp *pluginap
 }
 
 func tmpSocketDir() (socketDir, socketName, pluginSocketName string, err error) {
-	socketDir, err = ioutil.TempDir("", "device_plugin")
+	socketDir, err = os.MkdirTemp("", "device_plugin")
 	if err != nil {
 		return
 	}
@@ -592,7 +591,7 @@ func TestCheckpoint(t *testing.T) {
 	resourceName2 := "domain2.com/resource2"
 	resourceName3 := "domain2.com/resource3"
 	as := assert.New(t)
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 	ckm, err := checkpointmanager.NewCheckpointManager(tmpDir)
@@ -910,7 +909,7 @@ func TestPodContainerDeviceAllocation(t *testing.T) {
 	podsStub := activePodsStub{
 		activePods: []*v1.Pod{},
 	}
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 	testManager, err := getTestManager(tmpDir, podsStub.getActivePods, testResources)
@@ -1009,7 +1008,7 @@ func TestGetDeviceRunContainerOptions(t *testing.T) {
 	}
 	as := require.New(t)
 
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 
@@ -1071,7 +1070,7 @@ func TestInitContainerDeviceAllocation(t *testing.T) {
 	podsStub := activePodsStub{
 		activePods: []*v1.Pod{},
 	}
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 
@@ -1162,7 +1161,7 @@ func TestUpdatePluginResources(t *testing.T) {
 
 	as := assert.New(t)
 	monitorCallback := func(resourceName string, devices []pluginapi.Device) {}
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 
@@ -1220,7 +1219,7 @@ func TestDevicePreStartContainer(t *testing.T) {
 	podsStub := activePodsStub{
 		activePods: []*v1.Pod{},
 	}
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 
@@ -1282,7 +1281,7 @@ func TestDevicePreStartContainer(t *testing.T) {
 
 func TestResetExtendedResource(t *testing.T) {
 	as := assert.New(t)
-	tmpDir, err := ioutil.TempDir("", "checkpoint")
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
 	as.Nil(err)
 	defer os.RemoveAll(tmpDir)
 	ckm, err := checkpointmanager.NewCheckpointManager(tmpDir)
@@ -1392,7 +1391,7 @@ func TestReadPreNUMACheckpoint(t *testing.T) {
 	require.NoError(t, err)
 	defer os.RemoveAll(socketDir)
 
-	err = ioutil.WriteFile(filepath.Join(socketDir, deviceManagerCheckpointFilename), []byte(oldCheckpoint), 0644)
+	err = os.WriteFile(filepath.Join(socketDir, deviceManagerCheckpointFilename), []byte(oldCheckpoint), 0644)
 	require.NoError(t, err)
 
 	topologyStore := topologymanager.NewFakeManager()

pkg/kubelet/cm/memorymanager/memory_manager_test.go

@@ -18,7 +18,6 @@ package memorymanager
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"strings"
@@ -1982,7 +1981,7 @@ func TestNewManager(t *testing.T) {
 	}
 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
-			stateFileDirectory, err := ioutil.TempDir("/tmp/", "memory_manager_tests")
+			stateFileDirectory, err := os.MkdirTemp("/tmp/", "memory_manager_tests")
 			if err != nil {
 				t.Errorf("Cannot create state file: %s", err.Error())
 			}

pkg/kubelet/cm/memorymanager/state/state_checkpoint_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package state
 
 import (
-	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -111,7 +110,7 @@ func TestCheckpointStateRestore(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "memorymanager_state_test")
+	testingDir, err := os.MkdirTemp("", "memorymanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -174,7 +173,7 @@ func TestCheckpointStateStore(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "memorymanager_state_test")
+	testingDir, err := os.MkdirTemp("", "memorymanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -293,7 +292,7 @@ func TestCheckpointStateHelpers(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "memorymanager_state_test")
+	testingDir, err := os.MkdirTemp("", "memorymanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -362,7 +361,7 @@ func TestCheckpointStateClear(t *testing.T) {
 	}
 
 	// create temp dir
-	testingDir, err := ioutil.TempDir("", "memorymanager_state_test")
+	testingDir, err := os.MkdirTemp("", "memorymanager_state_test")
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/kubelet/config/file_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package config
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -35,7 +34,7 @@ func TestExtractFromBadDataFile(t *testing.T) {
 	defer removeAll(dirName, t)
 
 	fileName := filepath.Join(dirName, "test_pod_config")
-	err = ioutil.WriteFile(fileName, []byte{1, 2, 3}, 0555)
+	err = os.WriteFile(fileName, []byte{1, 2, 3}, 0555)
 	if err != nil {
 		t.Fatalf("unable to write test file %#v", err)
 	}
@@ -74,7 +73,7 @@ func TestExtractFromEmptyDir(t *testing.T) {
 }
 
 func mkTempDir(prefix string) (string, error) {
-	return ioutil.TempDir(os.TempDir(), prefix)
+	return os.MkdirTemp(os.TempDir(), prefix)
 }
 
 func removeAll(dir string, t *testing.T) {

pkg/kubelet/container/os.go

@@ -17,7 +17,6 @@ limitations under the License.
 package container
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
@@ -36,7 +35,7 @@ type OSInterface interface {
 	Hostname() (name string, err error)
 	Chtimes(path string, atime time.Time, mtime time.Time) error
 	Pipe() (r *os.File, w *os.File, err error)
-	ReadDir(dirname string) ([]os.FileInfo, error)
+	ReadDir(dirname string) ([]os.DirEntry, error)
 	Glob(pattern string) ([]string, error)
 	Open(name string) (*os.File, error)
 	OpenFile(name string, flag int, perm os.FileMode) (*os.File, error)
@@ -98,9 +97,9 @@ func (RealOS) Pipe() (r *os.File, w *os.File, err error) {
 	return os.Pipe()
 }
 
-// ReadDir will call ioutil.ReadDir to return the files under the directory.
+// ReadDir will call os.ReadDir to return the files under the directory.
-func (RealOS) ReadDir(dirname string) ([]os.FileInfo, error) {
+func (RealOS) ReadDir(dirname string) ([]os.DirEntry, error) {
-	return ioutil.ReadDir(dirname)
+	return os.ReadDir(dirname)
 }
 
 // Glob will call filepath.Glob to return the names of all files matching

pkg/kubelet/container/testing/mockdirentry.go

@@ -0,0 +1,107 @@
+/*
+Copyright 2022 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.
+*/
+
+// Code generated by MockGen.
+// Source: os (interfaces: DirEntry)
+
+package testing
+
+import (
+	fs "io/fs"
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+)
+
+// MockDirEntry is a mock of DirEntry interface.
+type MockDirEntry struct {
+	ctrl     *gomock.Controller
+	recorder *MockDirEntryMockRecorder
+}
+
+// MockDirEntryMockRecorder is the mock recorder for MockDirEntry.
+type MockDirEntryMockRecorder struct {
+	mock *MockDirEntry
+}
+
+// NewMockDirEntry creates a new mock instance.
+func NewMockDirEntry(ctrl *gomock.Controller) *MockDirEntry {
+	mock := &MockDirEntry{ctrl: ctrl}
+	mock.recorder = &MockDirEntryMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockDirEntry) EXPECT() *MockDirEntryMockRecorder {
+	return m.recorder
+}
+
+// Info mocks base method.
+func (m *MockDirEntry) Info() (fs.FileInfo, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Info")
+	ret0, _ := ret[0].(fs.FileInfo)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Info indicates an expected call of Info.
+func (mr *MockDirEntryMockRecorder) Info() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Info", reflect.TypeOf((*MockDirEntry)(nil).Info))
+}
+
+// IsDir mocks base method.
+func (m *MockDirEntry) IsDir() bool {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "IsDir")
+	ret0, _ := ret[0].(bool)
+	return ret0
+}
+
+// IsDir indicates an expected call of IsDir.
+func (mr *MockDirEntryMockRecorder) IsDir() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "IsDir", reflect.TypeOf((*MockDirEntry)(nil).IsDir))
+}
+
+// Name mocks base method.
+func (m *MockDirEntry) Name() string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Name")
+	ret0, _ := ret[0].(string)
+	return ret0
+}
+
+// Name indicates an expected call of Name.
+func (mr *MockDirEntryMockRecorder) Name() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Name", reflect.TypeOf((*MockDirEntry)(nil).Name))
+}
+
+// Type mocks base method.
+func (m *MockDirEntry) Type() fs.FileMode {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Type")
+	ret0, _ := ret[0].(fs.FileMode)
+	return ret0
+}
+
+// Type indicates an expected call of Type.
+func (mr *MockDirEntryMockRecorder) Type() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Type", reflect.TypeOf((*MockDirEntry)(nil).Type))
+}

pkg/kubelet/container/testing/mockfileinfo.go

@@ -1,109 +0,0 @@
-/*
-Copyright 2016 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.
-*/
-
-// Generated via: mockgen os FileInfo
-// Edited to include required boilerplate
-// Source: os (interfaces: FileInfo)
-
-package testing
-
-import (
-	os "os"
-	time "time"
-
-	gomock "github.com/golang/mock/gomock"
-)
-
-// Mock of FileInfo interface
-type MockFileInfo struct {
-	ctrl     *gomock.Controller
-	recorder *_MockFileInfoRecorder
-}
-
-// Recorder for MockFileInfo (not exported)
-type _MockFileInfoRecorder struct {
-	mock *MockFileInfo
-}
-
-func NewMockFileInfo(ctrl *gomock.Controller) *MockFileInfo {
-	mock := &MockFileInfo{ctrl: ctrl}
-	mock.recorder = &_MockFileInfoRecorder{mock}
-	return mock
-}
-
-func (_m *MockFileInfo) EXPECT() *_MockFileInfoRecorder {
-	return _m.recorder
-}
-
-func (_m *MockFileInfo) IsDir() bool {
-	ret := _m.ctrl.Call(_m, "IsDir")
-	ret0, _ := ret[0].(bool)
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) IsDir() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "IsDir")
-}
-
-func (_m *MockFileInfo) ModTime() time.Time {
-	ret := _m.ctrl.Call(_m, "ModTime")
-	ret0, _ := ret[0].(time.Time)
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) ModTime() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "ModTime")
-}
-
-func (_m *MockFileInfo) Mode() os.FileMode {
-	ret := _m.ctrl.Call(_m, "Mode")
-	ret0, _ := ret[0].(os.FileMode)
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) Mode() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "Mode")
-}
-
-func (_m *MockFileInfo) Name() string {
-	ret := _m.ctrl.Call(_m, "Name")
-	ret0, _ := ret[0].(string)
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) Name() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "Name")
-}
-
-func (_m *MockFileInfo) Size() int64 {
-	ret := _m.ctrl.Call(_m, "Size")
-	ret0, _ := ret[0].(int64)
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) Size() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "Size")
-}
-
-func (_m *MockFileInfo) Sys() interface{} {
-	ret := _m.ctrl.Call(_m, "Sys")
-	ret0, _ := ret[0].(interface{})
-	return ret0
-}
-
-func (_mr *_MockFileInfoRecorder) Sys() *gomock.Call {
-	return _mr.mock.ctrl.RecordCall(_mr.mock, "Sys")
-}

pkg/kubelet/container/testing/os.go

@@ -27,7 +27,7 @@ import (
 // of the real call.
 type FakeOS struct {
 	StatFn     func(string) (os.FileInfo, error)
-	ReadDirFn  func(string) ([]os.FileInfo, error)
+	ReadDirFn  func(string) ([]os.DirEntry, error)
 	MkdirAllFn func(string, os.FileMode) error
 	SymlinkFn  func(string, string) error
 	GlobFn     func(string, string) bool
@@ -109,7 +109,7 @@ func (FakeOS) Pipe() (r *os.File, w *os.File, err error) {
 }
 
 // ReadDir is a fake call that returns the files under the directory.
-func (f *FakeOS) ReadDir(dirname string) ([]os.FileInfo, error) {
+func (f *FakeOS) ReadDir(dirname string) ([]os.DirEntry, error) {
 	if f.ReadDirFn != nil {
 		return f.ReadDirFn(dirname)
 	}

pkg/kubelet/kubelet_pods.go

@@ -21,7 +21,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -344,12 +343,12 @@ func ensureHostsFile(fileName string, hostIPs []string, hostName, hostDomainName
 		hostsFileContent = managedHostsFileContent(hostIPs, hostName, hostDomainName, hostAliases)
 	}
 
-	return ioutil.WriteFile(fileName, hostsFileContent, 0644)
+	return os.WriteFile(fileName, hostsFileContent, 0644)
 }
 
 // nodeHostsFileContent reads the content of node's hosts file.
 func nodeHostsFileContent(hostsFilePath string, hostAliases []v1.HostAlias) ([]byte, error) {
-	hostsFileContent, err := ioutil.ReadFile(hostsFilePath)
+	hostsFileContent, err := os.ReadFile(hostsFilePath)
 	if err != nil {
 		return nil, err
 	}

pkg/kubelet/kubelet_pods_test.go

@@ -19,7 +19,6 @@ package kubelet
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -182,11 +181,11 @@ fe00::2	ip6-allrouters
 // writeHostsFile will write a hosts file into a temporary dir, and return that dir.
 // Caller is responsible for deleting the dir and its contents.
 func writeHostsFile(filename string, cfg string) (string, error) {
-	tmpdir, err := ioutil.TempDir("", "kubelet=kubelet_pods_test.go=")
+	tmpdir, err := os.MkdirTemp("", "kubelet=kubelet_pods_test.go=")
 	if err != nil {
 		return "", err
 	}
-	return tmpdir, ioutil.WriteFile(filepath.Join(tmpdir, filename), []byte(cfg), 0644)
+	return tmpdir, os.WriteFile(filepath.Join(tmpdir, filename), []byte(cfg), 0644)
 }
 
 func TestManagedHostsFileContent(t *testing.T) {

pkg/kubelet/kubelet_test.go

@@ -19,7 +19,6 @@ package kubelet
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -184,7 +183,7 @@ func newTestKubeletWithImageList(
 	kubelet.nodeName = types.NodeName(testKubeletHostname)
 	kubelet.runtimeState = newRuntimeState(maxWaitForContainerRuntime)
 	kubelet.runtimeState.setNetworkState(nil)
-	if tempDir, err := ioutil.TempDir("", "kubelet_test."); err != nil {
+	if tempDir, err := os.MkdirTemp("", "kubelet_test."); err != nil {
 		t.Fatalf("can't make a temp rootdir: %v", err)
 	} else {
 		kubelet.rootDirectory = tempDir

pkg/kubelet/kubelet_volumes_linux_test.go

@@ -21,7 +21,6 @@ package kubelet
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -146,7 +145,7 @@ func TestCleanupOrphanedPodDirs(t *testing.T) {
 				if err := os.MkdirAll(volumePath, 0750); err != nil {
 					return err
 				}
-				return ioutil.WriteFile(filepath.Join(volumePath, "test.txt"), []byte("test1"), 0640)
+				return os.WriteFile(filepath.Join(volumePath, "test.txt"), []byte("test1"), 0640)
 			},
 			validateFunc: func(kubelet *Kubelet) error {
 				podDir := kubelet.getPodDir("pod1uid")
@@ -160,7 +159,7 @@ func TestCleanupOrphanedPodDirs(t *testing.T) {
 				if err := os.MkdirAll(subPath, 0750); err != nil {
 					return err
 				}
-				return ioutil.WriteFile(filepath.Join(subPath, "test.txt"), []byte("test1"), 0640)
+				return os.WriteFile(filepath.Join(subPath, "test.txt"), []byte("test1"), 0640)
 			},
 			validateFunc: func(kubelet *Kubelet) error {
 				podDir := kubelet.getPodDir("pod1uid")

pkg/kubelet/kubeletconfig/util/files/files.go

@@ -91,7 +91,7 @@ func WriteTmpFile(fs utilfs.Filesystem, path string, data []byte) (tmpPath strin
 		}
 	}()
 
-	// Name() will be an absolute path when using utilfs.DefaultFS, because ioutil.TempFile passes
+	// Name() will be an absolute path when using utilfs.DefaultFS, because os.CreateTemp passes
 	// an absolute path to os.Open, and we ensure similar behavior in utilfs.FakeFS for testing.
 	tmpPath = tmpFile.Name()
 

pkg/kubelet/kuberuntime/kuberuntime_container.go

@@ -405,7 +405,7 @@ func (m *kubeGenericRuntimeManager) makeMounts(opts *kubecontainer.RunContainerO
 		} else {
 			fs.Close()
 
-			// Chmod is needed because ioutil.WriteFile() ends up calling
+			// Chmod is needed because os.WriteFile() ends up calling
 			// open(2) to create the file, so the final mode used is "mode &
 			// ~umask". But we want to make sure the specified mode is used
 			// in the file no matter what the umask is.

pkg/kubelet/kuberuntime/kuberuntime_container_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package kuberuntime
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
@@ -440,11 +439,11 @@ func TestRestartCountByLogDir(t *testing.T) {
 			restartCount: 8,
 		},
 	} {
-		tempDirPath, err := ioutil.TempDir("", "test-restart-count-")
+		tempDirPath, err := os.MkdirTemp("", "test-restart-count-")
 		assert.NoError(t, err, "create tempdir error")
 		defer os.RemoveAll(tempDirPath)
 		for _, filename := range tc.filenames {
-			err = ioutil.WriteFile(filepath.Join(tempDirPath, filename), []byte("a log line"), 0600)
+			err = os.WriteFile(filepath.Join(tempDirPath, filename), []byte("a log line"), 0600)
 			assert.NoError(t, err, "could not write log file")
 		}
 		count, _ := calcRestartCountByLogDir(tempDirPath)

pkg/kubelet/kuberuntime/kuberuntime_gc_test.go

@@ -438,14 +438,14 @@ func TestPodLogDirectoryGC(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	fakeOS.ReadDirFn = func(string) ([]os.FileInfo, error) {
+	fakeOS.ReadDirFn = func(string) ([]os.DirEntry, error) {
-		var fileInfos []os.FileInfo
+		var dirEntries []os.DirEntry
 		for _, file := range files {
-			mockFI := containertest.NewMockFileInfo(ctrl)
+			mockDE := containertest.NewMockDirEntry(ctrl)
-			mockFI.EXPECT().Name().Return(file)
+			mockDE.EXPECT().Name().Return(file)
-			fileInfos = append(fileInfos, mockFI)
+			dirEntries = append(dirEntries, mockDE)
 		}
-		return fileInfos, nil
+		return dirEntries, nil
 	}
 
 	// allSourcesReady == true, pod log directories without corresponding pod should be removed.

pkg/kubelet/kuberuntime/logs/logs_test.go

@@ -19,16 +19,16 @@ package logs
 import (
 	"bytes"
 	"context"
-	"io/ioutil"
-	apitesting "k8s.io/cri-api/pkg/apis/testing"
-	"k8s.io/utils/pointer"
 	"os"
 	"testing"
 	"time"
 
+	v1 "k8s.io/api/core/v1"
+	apitesting "k8s.io/cri-api/pkg/apis/testing"
+	"k8s.io/utils/pointer"
+
 	"github.com/stretchr/testify/assert"
 
-	"k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1"
 )
@@ -72,7 +72,7 @@ func TestLogOptions(t *testing.T) {
 }
 
 func TestReadLogs(t *testing.T) {
-	file, err := ioutil.TempFile("", "TestFollowLogs")
+	file, err := os.CreateTemp("", "TestFollowLogs")
 	if err != nil {
 		t.Fatalf("unable to create temp file")
 	}

pkg/kubelet/lifecycle/handlers_test.go

@@ -18,7 +18,7 @@ package lifecycle
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"reflect"
 	"strings"
@@ -225,7 +225,7 @@ func TestRunHandlerExecFailure(t *testing.T) {
 func TestRunHandlerHttpFailure(t *testing.T) {
 	expectedErr := fmt.Errorf("fake http error")
 	expectedResp := http.Response{
-		Body: ioutil.NopCloser(strings.NewReader(expectedErr.Error())),
+		Body: io.NopCloser(strings.NewReader(expectedErr.Error())),
 	}
 	fakeHTTPGetter := fakeHTTP{err: expectedErr, resp: &expectedResp}
 	handlerRunner := NewHandlerRunner(&fakeHTTPGetter, &fakeContainerCommandRunner{}, nil)

pkg/kubelet/logs/container_log_manager_test.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -36,7 +35,7 @@ import (
 )
 
 func TestGetAllLogs(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-get-all-logs")
+	dir, err := os.MkdirTemp("", "test-get-all-logs")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 	testLogs := []string{
@@ -75,7 +74,7 @@ func TestGetAllLogs(t *testing.T) {
 }
 
 func TestRotateLogs(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-rotate-logs")
+	dir, err := os.MkdirTemp("", "test-rotate-logs")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
@@ -162,7 +161,7 @@ func TestRotateLogs(t *testing.T) {
 }
 
 func TestClean(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-clean")
+	dir, err := os.MkdirTemp("", "test-clean")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
@@ -233,7 +232,7 @@ func TestClean(t *testing.T) {
 }
 
 func TestCleanupUnusedLog(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-cleanup-unused-log")
+	dir, err := os.MkdirTemp("", "test-cleanup-unused-log")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
@@ -285,7 +284,7 @@ func TestRemoveExcessLog(t *testing.T) {
 		},
 	} {
 		t.Logf("TestCase %q", desc)
-		dir, err := ioutil.TempDir("", "test-remove-excess-log")
+		dir, err := os.MkdirTemp("", "test-remove-excess-log")
 		require.NoError(t, err)
 		defer os.RemoveAll(dir)
 
@@ -319,11 +318,11 @@ func TestRemoveExcessLog(t *testing.T) {
 }
 
 func TestCompressLog(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-compress-log")
+	dir, err := os.MkdirTemp("", "test-compress-log")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
-	testFile, err := ioutil.TempFile(dir, "test-rotate-latest-log")
+	testFile, err := os.CreateTemp(dir, "test-rotate-latest-log")
 	require.NoError(t, err)
 	defer testFile.Close()
 	testContent := "test log content"
@@ -350,7 +349,7 @@ func TestCompressLog(t *testing.T) {
 }
 
 func TestRotateLatestLog(t *testing.T) {
-	dir, err := ioutil.TempDir("", "test-rotate-latest-log")
+	dir, err := os.MkdirTemp("", "test-rotate-latest-log")
 	require.NoError(t, err)
 	defer os.RemoveAll(dir)
 
@@ -387,7 +386,7 @@ func TestRotateLatestLog(t *testing.T) {
 		if test.runtimeError != nil {
 			f.InjectError("ReopenContainerLog", test.runtimeError)
 		}
-		testFile, err := ioutil.TempFile(dir, "test-rotate-latest-log")
+		testFile, err := os.CreateTemp(dir, "test-rotate-latest-log")
 		require.NoError(t, err)
 		defer testFile.Close()
 		testLog := testFile.Name()

pkg/kubelet/network/dns/dns.go

@@ -19,13 +19,12 @@ package dns
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
 	"strings"
 
-	"k8s.io/api/core/v1"
+	v1 "k8s.io/api/core/v1"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	utilvalidation "k8s.io/apimachinery/pkg/util/validation"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
@@ -455,7 +454,7 @@ func (c *Configurer) SetupDNSinContainerizedMounter(mounterPath string) {
 			}
 		}
 	}
-	if err := ioutil.WriteFile(resolvePath, []byte(dnsString), 0600); err != nil {
+	if err := os.WriteFile(resolvePath, []byte(dnsString), 0600); err != nil {
 		klog.ErrorS(err, "Could not write dns nameserver in the file", "path", resolvePath)
 	}
 }

pkg/kubelet/network/dns/dns_test.go

@@ -18,7 +18,6 @@ package dns
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"strconv"
@@ -596,7 +595,7 @@ func TestGetPodDNSCustom(t *testing.T) {
 	}
 
 	resolvConfContent := []byte(fmt.Sprintf("nameserver %s\nsearch %s\n", testHostNameserver, testHostDomain))
-	tmpfile, err := ioutil.TempFile("", "tmpResolvConf")
+	tmpfile, err := os.CreateTemp("", "tmpResolvConf")
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/kubelet/nodeshutdown/storage.go

@@ -19,7 +19,6 @@ package nodeshutdown
 import (
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"time"
@@ -67,7 +66,7 @@ type state struct {
 
 // atomicWrite atomically writes data to a file specified by filename.
 func atomicWrite(filename string, data []byte, perm os.FileMode) error {
-	f, err := ioutil.TempFile(filepath.Dir(filename), ".tmp-"+filepath.Base(filename))
+	f, err := os.CreateTemp(filepath.Dir(filename), ".tmp-"+filepath.Base(filename))
 	if err != nil {
 		return err
 	}

pkg/kubelet/nodeshutdown/systemd/inhibit_linux.go

@@ -21,7 +21,6 @@ package systemd
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"syscall"
@@ -193,7 +192,7 @@ InhibitDelayMaxSec=%.0f
 `, inhibitDelayMax.Seconds())
 
 	logindOverridePath := filepath.Join(logindConfigDirectory, kubeletLogindConf)
-	if err := ioutil.WriteFile(logindOverridePath, []byte(inhibitOverride), 0644); err != nil {
+	if err := os.WriteFile(logindOverridePath, []byte(inhibitOverride), 0644); err != nil {
 		return fmt.Errorf("failed writing logind shutdown inhibit override file %v: %w", logindOverridePath, err)
 	}
 

pkg/kubelet/pluginmanager/operationexecutor/operation_executor_test.go

@@ -18,7 +18,7 @@ package operationexecutor
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"testing"
 	"time"
@@ -35,7 +35,7 @@ var _ OperationGenerator = &fakeOperationGenerator{}
 var socketDir string
 
 func init() {
-	d, err := ioutil.TempDir("", "operation_executor_test")
+	d, err := os.MkdirTemp("", "operation_executor_test")
 	if err != nil {
 		panic(fmt.Sprintf("Could not create a temp directory: %s", d))
 	}

pkg/kubelet/pluginmanager/plugin_manager_test.go

@@ -18,7 +18,6 @@ package pluginmanager
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -81,7 +80,7 @@ func (f *fakePluginHandler) Reset() {
 }
 
 func init() {
-	d, err := ioutil.TempDir("", "plugin_manager_test")
+	d, err := os.MkdirTemp("", "plugin_manager_test")
 	if err != nil {
 		panic(fmt.Sprintf("Could not create a temp directory: %s", d))
 	}

pkg/kubelet/pluginmanager/pluginwatcher/plugin_watcher_test.go

@@ -19,7 +19,6 @@ package pluginwatcher
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"sync"
 	"testing"
@@ -46,7 +45,7 @@ func init() {
 	flag.StringVar(&logLevel, "logLevel", "6", "test")
 	flag.Lookup("v").Value.Set(logLevel)
 
-	d, err := ioutil.TempDir("", "plugin_test")
+	d, err := os.MkdirTemp("", "plugin_test")
 	if err != nil {
 		panic(fmt.Sprintf("Could not create a temp directory: %s", d))
 	}

pkg/kubelet/pluginmanager/reconciler/reconciler_test.go

@@ -18,7 +18,6 @@ package reconciler
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -44,7 +43,7 @@ var (
 )
 
 func init() {
-	d, err := ioutil.TempDir("", "reconciler_test")
+	d, err := os.MkdirTemp("", "reconciler_test")
 	if err != nil {
 		panic(fmt.Sprintf("Could not create a temp directory: %s", d))
 	}

pkg/kubelet/server/server_test.go

@@ -21,7 +21,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/http/httptest"
@@ -432,7 +431,7 @@ func TestServeRunInContainer(t *testing.T) {
 	}
 	defer resp.Body.Close()
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		// copying the response body did not work
 		t.Errorf("Cannot copy resp: %#v", err)
@@ -475,7 +474,7 @@ func TestServeRunInContainerWithUID(t *testing.T) {
 	}
 	defer resp.Body.Close()
 
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		// copying the response body did not work
 		t.Errorf("Cannot copy resp: %#v", err)
@@ -745,7 +744,7 @@ func assertHealthIsOk(t *testing.T, httpURL string) {
 	if resp.StatusCode != http.StatusOK {
 		t.Errorf("expected status code %d, got %d", http.StatusOK, resp.StatusCode)
 	}
-	body, readErr := ioutil.ReadAll(resp.Body)
+	body, readErr := io.ReadAll(resp.Body)
 	if readErr != nil {
 		// copying the response body did not work
 		t.Fatalf("Cannot copy resp: %#v", readErr)
@@ -821,7 +820,7 @@ func TestContainerLogs(t *testing.T) {
 			}
 			defer resp.Body.Close()
 
-			body, err := ioutil.ReadAll(resp.Body)
+			body, err := io.ReadAll(resp.Body)
 			if err != nil {
 				t.Errorf("Error reading container logs: %v", err)
 			}
@@ -911,7 +910,7 @@ func TestCheckpointContainer(t *testing.T) {
 		}
 		defer resp.Body.Close()
 		assert.Equal(t, resp.StatusCode, 500)
-		body, _ := ioutil.ReadAll(resp.Body)
+		body, _ := io.ReadAll(resp.Body)
 		assert.Equal(t, string(body), "checkpointing of other/foo/checkpointingFailure failed (Returning error for test)")
 	})
 	// Now test a successful checkpoint succeeds
@@ -1111,7 +1110,7 @@ func testExecAttach(t *testing.T, verb string) {
 			require.NoError(t, err, "POSTing")
 			defer resp.Body.Close()
 
-			_, err = ioutil.ReadAll(resp.Body)
+			_, err = io.ReadAll(resp.Body)
 			assert.NoError(t, err, "reading response body")
 
 			require.Equal(t, test.responseStatusCode, resp.StatusCode, "response status")
@@ -1453,7 +1452,7 @@ func TestFailedParseParamsSummaryHandler(t *testing.T) {
 	resp, err := http.Post(fw.testHTTPServer.URL+"/stats/summary", "invalid/content/type", nil)
 	assert.NoError(t, err)
 	defer resp.Body.Close()
-	v, err := ioutil.ReadAll(resp.Body)
+	v, err := io.ReadAll(resp.Body)
 	assert.NoError(t, err)
 	assert.Equal(t, http.StatusInternalServerError, resp.StatusCode)
 	assert.Contains(t, string(v), "parse form failed")
@@ -1463,14 +1462,14 @@ func verifyEndpointResponse(t *testing.T, fw *serverTestFramework, path string,
 	resp, err := http.Get(fw.testHTTPServer.URL + path)
 	require.NoError(t, err)
 	assert.Equal(t, http.StatusMethodNotAllowed, resp.StatusCode)
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	require.NoError(t, err)
 	assert.Equal(t, expectedResponse, string(body))
 
 	resp, err = http.Post(fw.testHTTPServer.URL+path, "", nil)
 	require.NoError(t, err)
 	assert.Equal(t, http.StatusMethodNotAllowed, resp.StatusCode)
-	body, err = ioutil.ReadAll(resp.Body)
+	body, err = io.ReadAll(resp.Body)
 	require.NoError(t, err)
 	assert.Equal(t, expectedResponse, string(body))
 }

pkg/kubelet/stats/cri_stats_provider_test.go

@@ -211,20 +211,20 @@ func TestCRIListPodStats(t *testing.T) {
 	defer ctrl.Finish()
 
 	fakeOS := &kubecontainertest.FakeOS{}
-	fakeOS.ReadDirFn = func(path string) ([]os.FileInfo, error) {
+	fakeOS.ReadDirFn = func(path string) ([]os.DirEntry, error) {
-		var fileInfos []os.FileInfo
+		var dirEntries []os.DirEntry
-		mockFI := kubecontainertest.NewMockFileInfo(ctrl)
+		mockDE := kubecontainertest.NewMockDirEntry(ctrl)
 		switch path {
 		case kuberuntime.BuildPodLogsDirectory("sandbox0-ns", "sandbox0-name", types.UID("sandbox0-uid")):
-			mockFI.EXPECT().Name().Return(podLogName0)
+			mockDE.EXPECT().Name().Return(podLogName0)
 		case kuberuntime.BuildPodLogsDirectory("sandbox1-ns", "sandbox1-name", types.UID("sandbox1-uid")):
-			mockFI.EXPECT().Name().Return(podLogName1)
+			mockDE.EXPECT().Name().Return(podLogName1)
 		default:
 			return nil, nil
 		}
-		mockFI.EXPECT().IsDir().Return(false)
+		mockDE.EXPECT().IsDir().Return(false)
-		fileInfos = append(fileInfos, mockFI)
+		dirEntries = append(dirEntries, mockDE)
-		return fileInfos, nil
+		return dirEntries, nil
 	}
 
 	provider := NewCRIStatsProvider(

pkg/kubelet/stats/pidlimit/pidlimit_linux.go

@@ -21,7 +21,7 @@ package pidlimit
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 	"syscall"
@@ -39,7 +39,7 @@ func Stats() (*statsapi.RlimitStats, error) {
 	// Calculate the mininum of kernel.pid_max and kernel.threads-max as they both specify the
 	// system-wide limit on the number of tasks.
 	for _, file := range []string{"/proc/sys/kernel/pid_max", "/proc/sys/kernel/threads-max"} {
-		if content, err := ioutil.ReadFile(file); err == nil {
+		if content, err := os.ReadFile(file); err == nil {
 			if limit, err := strconv.ParseInt(string(content[:len(content)-1]), 10, 64); err == nil {
 				if taskMax == -1 || taskMax > limit {
 					taskMax = limit
@@ -71,7 +71,7 @@ func Stats() (*statsapi.RlimitStats, error) {
 
 func runningTaskCount() (int64, error) {
 	// Example: 1.36 3.49 4.53 2/3518 3715089
-	bytes, err := ioutil.ReadFile("/proc/loadavg")
+	bytes, err := os.ReadFile("/proc/loadavg")
 	if err != nil {
 		return 0, err
 	}

pkg/kubelet/util/util_unix.go

@@ -22,7 +22,6 @@ package util
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/url"
 	"os"
@@ -58,7 +57,7 @@ func CreateListener(endpoint string) (net.Listener, error) {
 	}
 
 	// Create the socket on a tempfile and move it to the destination socket to handle improper cleanup
-	file, err := ioutil.TempFile(filepath.Dir(addr), "")
+	file, err := os.CreateTemp(filepath.Dir(addr), "")
 	if err != nil {
 		return nil, fmt.Errorf("failed to create temporary file: %v", err)
 	}

pkg/kubelet/util/util_unix_test.go

@@ -20,7 +20,6 @@ limitations under the License.
 package util
 
 import (
-	"io/ioutil"
 	"net"
 	"os"
 	"testing"
@@ -102,7 +101,7 @@ func TestIsUnixDomainSocket(t *testing.T) {
 		},
 	}
 	for _, test := range tests {
-		f, err := ioutil.TempFile("", "test-domain-socket")
+		f, err := os.CreateTemp("", "test-domain-socket")
 		require.NoErrorf(t, err, "Failed to create file for test purposes: %v while setting up: %s", err, test.label)
 		addr := f.Name()
 		f.Close()

pkg/kubelet/util/util_windows_test.go

@@ -21,7 +21,6 @@ package util
 
 import (
 	"fmt"
-	"io/ioutil"
 	"math/rand"
 	"net"
 	"os"
@@ -204,7 +203,7 @@ func testPipe(t *testing.T, label string) {
 }
 
 func testRegularFile(t *testing.T, label string, exists bool) {
-	f, err := ioutil.TempFile("", "test-file")
+	f, err := os.CreateTemp("", "test-file")
 	require.NoErrorf(t, err, "Failed to create file for test purposes: %v while setting up: %s", err, label)
 	testFile := f.Name()
 	if !exists {
@@ -218,7 +217,7 @@ func testRegularFile(t *testing.T, label string, exists bool) {
 }
 
 func testUnixDomainSocket(t *testing.T, label string) {
-	f, err := ioutil.TempFile("", "test-domain-socket")
+	f, err := os.CreateTemp("", "test-domain-socket")
 	require.NoErrorf(t, err, "Failed to create file for test purposes: %v while setting up: %s", err, label)
 	testFile := f.Name()
 	f.Close()
@@ -241,7 +240,7 @@ func testPendingUnixDomainSocket(t *testing.T, label string) {
 	// not-yet-ready state. We need this because the Kubelet keeps an eye on file
 	// changes and acts on them, leading to potential race issues as described in
 	// the referenced issue above
-	f, err := ioutil.TempFile("", "test-domain-socket")
+	f, err := os.CreateTemp("", "test-domain-socket")
 	require.NoErrorf(t, err, "Failed to create file for test purposes: %v while setting up: %s", err, label)
 	testFile := f.Name()
 	f.Close()