Stop using deprecated ioutils

Author: adrianmoisey

vertical-pod-autoscaler/e2e/utils/certs.go

@@ -20,7 +20,6 @@ package utils
 
 import (
 	"crypto/x509"
-	"io/ioutil"
 	"os"
 
 	"k8s.io/client-go/util/cert"
@@ -38,7 +37,7 @@ type certContext struct {
 // SetupWebhookCert sets up the server cert. For example, user, apiservers and admission webhooks
 // can use the cert to prove their identity to the kube-apiserver.
 func SetupWebhookCert(namespaceName string) *certContext {
-	certDir, err := ioutil.TempDir("", "test-e2e-server-cert")
+	certDir, err := os.MkdirTemp("", "test-e2e-server-cert")
 	if err != nil {
 		framework.Failf("Failed to create a temp dir for cert generation %v", err)
 	}
@@ -51,11 +50,11 @@ func SetupWebhookCert(namespaceName string) *certContext {
 	if err != nil {
 		framework.Failf("Failed to create CA cert for apiserver %v", err)
 	}
-	caCertFile, err := ioutil.TempFile(certDir, "ca.crt")
+	caCertFile, err := os.CreateTemp(certDir, "ca.crt")
 	if err != nil {
 		framework.Failf("Failed to create a temp file for ca cert generation %v", err)
 	}
-	if err := ioutil.WriteFile(caCertFile.Name(), utils.EncodeCertPEM(signingCert), 0644); err != nil {
+	if err := os.WriteFile(caCertFile.Name(), utils.EncodeCertPEM(signingCert), 0644); err != nil {
 		framework.Failf("Failed to write CA cert %v", err)
 	}
 	key, err := utils.NewPrivateKey()
@@ -73,22 +72,22 @@ func SetupWebhookCert(namespaceName string) *certContext {
 	if err != nil {
 		framework.Failf("Failed to create cert%v", err)
 	}
-	certFile, err := ioutil.TempFile(certDir, "server.crt")
+	certFile, err := os.CreateTemp(certDir, "server.crt")
 	if err != nil {
 		framework.Failf("Failed to create a temp file for cert generation %v", err)
 	}
-	keyFile, err := ioutil.TempFile(certDir, "server.key")
+	keyFile, err := os.CreateTemp(certDir, "server.key")
 	if err != nil {
 		framework.Failf("Failed to create a temp file for key generation %v", err)
 	}
-	if err = ioutil.WriteFile(certFile.Name(), utils.EncodeCertPEM(signedCert), 0600); err != nil {
+	if err = os.WriteFile(certFile.Name(), utils.EncodeCertPEM(signedCert), 0600); err != nil {
 		framework.Failf("Failed to write cert file %v", err)
 	}
 	privateKeyPEM, err := keyutil.MarshalPrivateKeyToPEM(key)
 	if err != nil {
 		framework.Failf("Failed to marshal key %v", err)
 	}
-	if err = ioutil.WriteFile(keyFile.Name(), privateKeyPEM, 0644); err != nil {
+	if err = os.WriteFile(keyFile.Name(), privateKeyPEM, 0644); err != nil {
 		framework.Failf("Failed to write key file %v", err)
 	}
 	return &certContext{

vertical-pod-autoscaler/e2e/v1/e2e.go

@@ -21,7 +21,7 @@ package autoscaling
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path"
 	"testing"
 	"time"
@@ -334,7 +334,7 @@ func gatherTestSuiteMetrics() error {
 	metricsJSON := metricsForE2E.PrintJSON()
 	if framework.TestContext.ReportDir != "" {
 		filePath := path.Join(framework.TestContext.ReportDir, "MetricsForE2ESuite_"+time.Now().Format(time.RFC3339)+".json")
-		if err := ioutil.WriteFile(filePath, []byte(metricsJSON), 0644); err != nil {
+		if err := os.WriteFile(filePath, []byte(metricsJSON), 0644); err != nil {
 			return fmt.Errorf("error writing to %q: %v", filePath, err)
 		}
 	} else {