replace the ioutil by the os and io

Signed-off-by: chaunceyjiang <chaunceyjiang@gmail.com>

hack/tools/genkarmadactldocs/gen_karmadactl_docs.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -116,7 +115,7 @@ func main() {
 		if info.IsDir() {
 			return nil
 		}
-		data, err := ioutil.ReadFile(path)
+		data, err := os.ReadFile(path)
 		if err != nil {
 			return err
 		}

hack/tools/preferredimports/preferredimports.go

@@ -30,7 +30,6 @@ import (
 	"go/format"
 	"go/parser"
 	"go/token"
-	"io/ioutil"
 	"log"
 	"os"
 	"path/filepath"
@@ -133,7 +132,7 @@ func (a *analyzer) collect(dir string) {
 						panic(fmt.Sprintf("Error stat'ing file: %s\n%s\n", pathToFile, err.Error()))
 					}
 
-					err = ioutil.WriteFile(pathToFile, buffer.Bytes(), fileInfo.Mode())
+					err = os.WriteFile(pathToFile, buffer.Bytes(), fileInfo.Mode())
 					if err != nil {
 						panic(fmt.Sprintf("Error writing file: %s\n%s\n", pathToFile, err.Error()))
 					}
@@ -244,7 +243,7 @@ func main() {
 	sort.Strings(c.dirs)
 
 	if len(*importAliases) > 0 {
-		bytes, err := ioutil.ReadFile(*importAliases)
+		bytes, err := os.ReadFile(*importAliases)
 		if err != nil {
 			log.Fatalf("Error reading import aliases: %v", err)
 		}

pkg/karmadactl/cmdinit/karmada/deploy.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path"
 	"path/filepath"
 	"regexp"
@@ -176,7 +176,7 @@ func createExtralResources(clientSet *kubernetes.Clientset, dir string) error {
 }
 
 func crdPatchesResources(filename, caBundle string) ([]byte, error) {
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return nil, err
 	}
@@ -193,7 +193,7 @@ func crdPatchesResources(filename, caBundle string) ([]byte, error) {
 // createCRDs create crd resource
 func createCRDs(crdClient *clientset.Clientset, filename string) error {
 	obj := apiextensionsv1.CustomResourceDefinition{}
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		return err
 	}

pkg/karmadactl/cmdinit/utils/format.go

@@ -3,7 +3,7 @@ package utils
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"os"
@@ -60,7 +60,7 @@ func InternetIP() (net.IP, error) {
 
 	defer resp.Body.Close()
 
-	content, err := ioutil.ReadAll(resp.Body)
+	content, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}

pkg/karmadactl/register.go

@@ -9,7 +9,6 @@ import (
 	"crypto/x509/pkix"
 	"encoding/pem"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -262,7 +261,7 @@ func (o *CommandRegisterOption) Complete(args []string) error {
 	}
 
 	if len(o.ClusterName) == 0 {
-		configBytes, err := ioutil.ReadFile(o.KubeConfig)
+		configBytes, err := os.ReadFile(o.KubeConfig)
 		if err != nil {
 			return fmt.Errorf("failed to read kubeconfig file %s, err: %w", o.KubeConfig, err)
 		}

pkg/search/proxy/framework/plugins/cluster/cluster.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"io"
-	"io/ioutil"
 	"net/http"
 
 	corev1 "k8s.io/api/core/v1"
@@ -121,7 +120,7 @@ func modifyRequest(req *http.Request, cluster string) error {
 	_ = req.Body.Close()
 
 	defer func() {
-		req.Body = ioutil.NopCloser(body)
+		req.Body = io.NopCloser(body)
 		req.ContentLength = int64(body.Len())
 	}()
 

pkg/search/proxy/framework/plugins/cluster/cluster_test.go

@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -137,7 +136,7 @@ func TestModifyRequest(t *testing.T) {
 
 			var get runtime.Object
 			if req.ContentLength != 0 {
-				data, err := ioutil.ReadAll(req.Body)
+				data, err := io.ReadAll(req.Body)
 				if err != nil {
 					t.Error(err)
 					return
@@ -368,7 +367,7 @@ func Test_clusterProxy_connect(t *testing.T) {
 				request: (&http.Request{
 					Method:        "PUT",
 					URL:           &url.URL{Scheme: "https", Host: "localhost", Path: "/test"},
-					Body:          ioutil.NopCloser(&alwaysErrorReader{}),
+					Body:          io.NopCloser(&alwaysErrorReader{}),
 					ContentLength: 10,
 					Header:        make(http.Header),
 				}).WithContext(reqCtx),

pkg/webhook/interpreter/http.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 
 	"k8s.io/apimachinery/pkg/runtime"
@@ -34,7 +33,7 @@ func (wh *Webhook) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	defer r.Body.Close()
-	if body, err = ioutil.ReadAll(r.Body); err != nil {
+	if body, err = io.ReadAll(r.Body); err != nil {
 		klog.Errorf("unable to read the body from the incoming request: %w", err)
 		res = Errored(http.StatusBadRequest, err)
 		wh.writeResponse(w, res)