cleanup: use os.ReadFile to read file

as ioutil.ReadFile is deprecated and
suggestion is to use os.ReadFile as
per https://pkg.go.dev/io/ioutil updating
the same.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

internal/kms/kms.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/ceph/ceph-csi/internal/util/k8s"
@@ -94,7 +93,7 @@ func GetKMS(tenant, kmsID string, secrets map[string]string) (EncryptionKMS, err
 func getKMSConfiguration() (map[string]interface{}, error) {
 	var config map[string]interface{}
 	// #nosec
-	content, err := ioutil.ReadFile(kmsConfigPath)
+	content, err := os.ReadFile(kmsConfigPath)
 	if err == nil {
 		// kmsConfigPath exists and was successfully read
 		err = json.Unmarshal(content, &config)

internal/rbd/rbd_util.go

@@ -21,7 +21,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -244,7 +243,7 @@ func GetKrbdSupportedFeatures() (string, error) {
 			return "", err
 		}
 	}
-	val, err := ioutil.ReadFile(krbdSupportedFeaturesFile)
+	val, err := os.ReadFile(krbdSupportedFeaturesFile)
 	if err != nil {
 		log.ErrorLogMsg("reading file %q failed: %v", krbdSupportedFeaturesFile, err)
 
@@ -1638,7 +1637,7 @@ func lookupRBDImageMetadataStash(metaDataPath string) (rbdImageMetadataStash, er
 	var imgMeta rbdImageMetadataStash
 
 	fPath := filepath.Join(metaDataPath, stashFileName)
-	encodedBytes, err := ioutil.ReadFile(fPath) // #nosec - intended reading from fPath
+	encodedBytes, err := os.ReadFile(fPath) // #nosec - intended reading from fPath
 	if err != nil {
 		if !os.IsNotExist(err) {
 			return imgMeta, fmt.Errorf("failed to read stashed JSON image metadata from path (%s): %w", fPath, err)

internal/util/cluster_mapping.go

@@ -21,7 +21,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	"github.com/ceph/ceph-csi/internal/util/log"
@@ -70,7 +69,7 @@ type ClusterMappingInfo struct {
 
 func readClusterMappingInfo(filename string) (*[]ClusterMappingInfo, error) {
 	var info []ClusterMappingInfo
-	content, err := ioutil.ReadFile(filename) // #nosec:G304, file inclusion via variable.
+	content, err := os.ReadFile(filename) // #nosec:G304, file inclusion via variable.
 	if err != nil {
 		err = fmt.Errorf("error fetching clusterID mapping %w", err)
 

internal/util/conn_pool.go

@@ -18,7 +18,7 @@ package util
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"sync"
 	"time"
 
@@ -96,7 +96,7 @@ func (cp *ConnPool) Destroy() {
 
 func (cp *ConnPool) generateUniqueKey(monitors, user, keyfile string) (string, error) {
 	// the keyfile can be unique for operations, contents will be the same
-	key, err := ioutil.ReadFile(keyfile) // #nosec:G304, file inclusion via variable.
+	key, err := os.ReadFile(keyfile) // #nosec:G304, file inclusion via variable.
 	if err != nil {
 		return "", fmt.Errorf("could not open keyfile %s: %w", keyfile, err)
 	}

internal/util/csiconfig.go

@@ -20,7 +20,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strings"
 )
 
@@ -72,7 +72,7 @@ func readClusterInfo(pathToConfig, clusterID string) (*ClusterInfo, error) {
 	var config []ClusterInfo
 
 	// #nosec
-	content, err := ioutil.ReadFile(pathToConfig)
+	content, err := os.ReadFile(pathToConfig)
 	if err != nil {
 		err = fmt.Errorf("error fetching configuration for cluster ID %q: %w", clusterID, err)
 

internal/util/log/log_utils.go

@@ -15,7 +15,6 @@ package log
 
 import (
 	"compress/gzip"
-	"io/ioutil"
 	"os"
 	"strings"
 )
@@ -24,7 +23,7 @@ import (
 // compressed format.
 func GzipLogFile(pathToFile string) error {
 	// Get all the bytes from the file.
-	content, err := ioutil.ReadFile(pathToFile) // #nosec:G304, file inclusion via variable.
+	content, err := os.ReadFile(pathToFile) // #nosec:G304, file inclusion via variable.
 	if err != nil {
 		return err
 	}