Add golanci-lint config file and address lints

Signed-off-by: Carlos Eduardo Arango Gutierrez <[email protected]>

.golangci.yml

@@ -0,0 +1,40 @@
+run:
+  deadline: 10m
+
+linters:
+  enable:
+    - contextcheck
+    - errcheck
+    - gocritic
+    - gofmt
+    - goimports
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - misspell
+    - staticcheck
+    - unconvert
+  disable: []
+
+linters-settings:
+  goimports:
+    local-prefixes: github.com/NVIDIA/k8s-device-plugin
+
+issues:
+  exclude-rules:
+  # We use math/rand instead of crypto/rand for unique names in e2e tests.
+  - path: tests/e2e/
+    linters:
+    - gosec
+    text: "G404"
+  # We disable the memory aliasing checks in tests
+  - path: ".*_test.go"
+    linters:
+    - gosec
+    text: "G601: Implicit memory aliasing in for loop"
+  # We create world-readable files in tests.
+  - path: ".*_test.go"
+    linters:
+    - gosec
+    text: "G306: Expect WriteFile permissions to be 0600 or less"

api/spec/v1/helpers.go

@@ -48,6 +48,7 @@ func (vs *VGPUConfigSpec) MatchesDeviceFilter(deviceID types.DeviceID) bool {
 
 // MatchesAllDevices checks a 'VGPUConfigSpec' to see if it matches on 'all' devices.
 func (vs *VGPUConfigSpec) MatchesAllDevices() bool {
+	// nolint: gocritic
 	switch devices := vs.Devices.(type) {
 	case string:
 		return devices == "all"
@@ -57,6 +58,7 @@ func (vs *VGPUConfigSpec) MatchesAllDevices() bool {
 
 // MatchesDevices checks a 'VGPUConfigSpec' to see if it matches on a device at the specified 'index'.
 func (vs *VGPUConfigSpec) MatchesDevices(index int) bool {
+	// nolint: gocritic
 	switch devices := vs.Devices.(type) {
 	case []int:
 		for _, d := range devices {

api/spec/v1/spec_test.go

@@ -17,9 +17,10 @@
 package v1
 
 import (
+	"testing"
+
 	"github.com/stretchr/testify/require"
 	"sigs.k8s.io/yaml"
-	"testing"
 )
 
 func TestSpec(t *testing.T) {

cmd/nvidia-vgpu-dm/apply/apply.go

@@ -94,6 +94,7 @@ func (c *Context) ApplyVGPUConfig() error {
 func applyWrapper(c *cli.Context, f *Flags) error {
 	err := CheckFlags(f)
 	if err != nil {
+		//nolint:errcheck
 		cli.ShowSubcommandHelp(c)
 		return err
 	}

cmd/nvidia-vgpu-dm/assert/assert.go

@@ -93,6 +93,7 @@ func BuildCommand() *cli.Command {
 func assertWrapper(c *cli.Context, f *Flags) error {
 	err := CheckFlags(f)
 	if err != nil {
+		//nolint:errcheck
 		cli.ShowSubcommandHelp(c)
 		return err
 	}
@@ -217,6 +218,7 @@ func WalkSelectedVGPUConfigForEachGPU(vgpuConfig v1.VGPUConfigSpecSlice, f func(
 
 			log.Debugf("  GPU %v: %v", i, deviceID)
 
+			// nolint: gosec
 			err = f(&vc, i, deviceID)
 			if err != nil {
 				return err

deployments/container/main.go

@@ -18,22 +18,24 @@ package main
 
 import (
 	"fmt"
+	"os"
+	"os/exec"
+
 	log "github.com/sirupsen/logrus"
 	cli "github.com/urfave/cli/v2"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/tools/cache"
 	"k8s.io/client-go/tools/clientcmd"
-	"os"
-	"os/exec"
 
 	"context"
+	"sync"
+	"time"
+
 	corev1 "k8s.io/api/core/v1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/util/wait"
-	"sync"
-	"time"
 )
 
 const (
@@ -217,7 +219,7 @@ func start(c *cli.Context) error {
 			log.Errorf("ERROR: %v", err)
 			continue
 		}
-		log.Infof("Successfuly updated to vGPU config: %s", value)
+		log.Infof("Successfully updated to vGPU config: %s", value)
 	}
 }
 
@@ -251,13 +253,14 @@ func continuouslySyncVGPUConfigChanges(clientset *kubernetes.Clientset, vGPUConf
 }
 
 func updateConfig(clientset *kubernetes.Clientset, selectedConfig string) error {
+	//nolint:errcheck
 	defer setVGPUConfigStateLabel(clientset)
 	vGPUConfigState = "failed"
 
 	log.Info("Asserting that the requested configuration is present in the configuration file")
 	err := assertValidConfig(selectedConfig)
 	if err != nil {
-		return fmt.Errorf("Unable to validate the selected vGPU configuration")
+		return fmt.Errorf("unable to validate the selected vGPU configuration")
 	}
 
 	log.Info("Checking if the selected vGPU device configuration is currently applied or not")

pkg/types/types_test.go

@@ -17,8 +17,9 @@
 package types
 
 import (
-	"github.com/stretchr/testify/require"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestParseVGPUType(t *testing.T) {

pkg/types/vgpu_config.go

@@ -46,7 +46,7 @@ func (v VGPUConfig) AssertValid() error {
 				return fmt.Errorf("cannot mix time-sliced and MIG-backed vGPU devices on the same GPU")
 			}
 			migBacked = true
-		} else {
+		} else if vgpuType.G <= 0 {
 			if idx > 0 && migBacked {
 				return fmt.Errorf("cannot mix time-sliced and MIG-backed vGPU devices on the same GPU")
 			}