fix: golint ioutils, error format

controllers/daemon_connector.go

@@ -8,7 +8,7 @@ package controllers
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	"bytes"
@@ -79,7 +79,7 @@ func (dc DaemonConnector) GetInterfaces(podAddress string) ([]multinicv1.Interfa
 		return []multinicv1.InterfaceInfoType{}, err
 	}
 	defer res.Body.Close()
-	body, err := ioutil.ReadAll(res.Body)
+	body, err := io.ReadAll(res.Body)
 	if err != nil {
 		return []multinicv1.InterfaceInfoType{}, err
 	}
@@ -112,7 +112,7 @@ func (dc DaemonConnector) Join(podAddress string, hifs []multinicv1.InterfaceInf
 			return errors.New(res.Status)
 		}
 
-		_, err = ioutil.ReadAll(res.Body)
+		_, err = io.ReadAll(res.Body)
 		if err != nil {
 			return err
 		}
@@ -165,7 +165,7 @@ func (dc DaemonConnector) putRouteRequest(podAddress string, path string, cidrNa
 			return response, errors.New(res.Status)
 		}
 
-		body, err := ioutil.ReadAll(res.Body)
+		body, err := io.ReadAll(res.Body)
 		if err != nil {
 			return response, err
 		}

plugin/mellanox.go

@@ -59,9 +59,9 @@ func (p *MellanoxPlugin) GetConfig(net multinicv1.MultiNicNetwork, hifList map[s
 	// get resource from nicclusterpolicy
 	resourceName := p.GetResourceName()
 	if resourceName == "" {
-		msg := "failed to get resource name from sriov plugin config"
-		vars.NetworkLog.V(2).Info(msg)
-		return "", annotation, fmt.Errorf(msg)
+		err := fmt.Errorf("failed to get resource name from sriov plugin config")
+		vars.NetworkLog.V(2).Info(err.Error())
+		return "", annotation, err
 	}
 
 	name := net.GetName()

plugin/net_attach_def.go

@@ -8,14 +8,15 @@ package plugin
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"strings"
 
 	"github.com/containernetworking/cni/pkg/types"
 	multinicv1 "github.com/foundation-model-stack/multi-nic-cni/api/v1"
 	"github.com/foundation-model-stack/multi-nic-cni/controllers/vars"
 	v1 "k8s.io/api/core/v1"
-	"k8s.io/apimachinery/pkg/api/errors"
+	k8serrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/client-go/dynamic"
@@ -143,7 +144,7 @@ func (h *NetAttachDefHandler) CreateOrUpdateOnNamespace(ns string, net *multinic
 	errMsg := h.createOrUpdate(def, "")
 	if errMsg != "" {
 		vars.NetworkLog.V(2).Info(errMsg)
-		return fmt.Errorf(errMsg)
+		return errors.New(errMsg)
 	}
 	return nil
 }
@@ -268,7 +269,7 @@ func (h *NetAttachDefHandler) Get(name string, namespace string) (*NetworkAttach
 func (h *NetAttachDefHandler) IsExist(name string, namespace string) bool {
 	_, err := h.Get(name, namespace)
 	if err != nil {
-		if !errors.IsNotFound(err) {
+		if !k8serrors.IsNotFound(err) {
 			vars.NetworkLog.V(2).Info(fmt.Sprintf("Not exist: %v", err))
 		}
 		return false

plugin/sriov_resource.go

@@ -8,7 +8,6 @@ package plugin
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -312,7 +311,7 @@ func RenderTemplate(path string, d *RenderData) ([]*unstructured.Unstructured, e
 	tmpl.Funcs(template.FuncMap{"getOr": getOr, "isSet": isSet})
 	tmpl.Funcs(sprig.TxtFuncMap())
 
-	source, err := ioutil.ReadFile(path)
+	source, err := os.ReadFile(path)
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to read manifest %s", path)
 	}