Merge pull request #84626 from hwdef/fix-staticcheck1

cmd/kubeadm/app: fix staticcheck warning

cmd/kubeadm/app/cmd/alpha/certs.go

@@ -32,7 +32,6 @@ import (
 	"k8s.io/kubernetes/cmd/kubeadm/app/cmd/options"
 	cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
 	"k8s.io/kubernetes/cmd/kubeadm/app/constants"
-	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/certs/renewal"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/copycerts"
 	configutil "k8s.io/kubernetes/cmd/kubeadm/app/util/config"
@@ -80,7 +79,7 @@ func newCmdCertsUtility(out io.Writer) *cobra.Command {
 	}
 
 	cmd.AddCommand(newCmdCertsRenewal())
-	cmd.AddCommand(newCmdCertsExpiration(out, kubeadmconstants.KubernetesDir))
+	cmd.AddCommand(newCmdCertsExpiration(out, constants.KubernetesDir))
 	cmd.AddCommand(NewCmdCertificateKey())
 	return cmd
 }
@@ -112,7 +111,7 @@ func newCmdCertsRenewal() *cobra.Command {
 		RunE:  cmdutil.SubCmdRunE("renew"),
 	}
 
-	cmd.AddCommand(getRenewSubCommands(kubeadmconstants.KubernetesDir)...)
+	cmd.AddCommand(getRenewSubCommands(constants.KubernetesDir)...)
 
 	return cmd
 }

cmd/kubeadm/app/cmd/alpha/certs_test.go

@@ -28,7 +28,6 @@ import (
 
 	"github.com/spf13/cobra"
 	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
-	"k8s.io/kubernetes/cmd/kubeadm/app/phases/certs"
 	certsphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/certs"
 	kubeconfigphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/kubeconfig"
 	"k8s.io/kubernetes/cmd/kubeadm/app/util/pkiutil"
@@ -266,7 +265,7 @@ func TestRunRenewCommands(t *testing.T) {
 func TestRenewUsingCSR(t *testing.T) {
 	tmpDir := testutil.SetupTempDir(t)
 	defer os.RemoveAll(tmpDir)
-	cert := &certs.KubeadmCertEtcdServer
+	cert := &certsphase.KubeadmCertEtcdServer
 
 	cfg := testutil.GetDefaultInternalConfig(t)
 	cfg.CertificatesDir = tmpDir

cmd/kubeadm/app/cmd/upgrade/diff.go

@@ -31,7 +31,6 @@ import (
 	"k8s.io/kubernetes/cmd/kubeadm/app/cmd/options"
 	cmdutil "k8s.io/kubernetes/cmd/kubeadm/app/cmd/util"
 	"k8s.io/kubernetes/cmd/kubeadm/app/constants"
-	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane"
 	kubeadmutil "k8s.io/kubernetes/cmd/kubeadm/app/util"
 	configutil "k8s.io/kubernetes/cmd/kubeadm/app/util/config"
@@ -58,7 +57,7 @@ var (
 // NewCmdDiff returns the cobra command for `kubeadm upgrade diff`
 func NewCmdDiff(out io.Writer) *cobra.Command {
 	flags := &diffFlags{
-		kubeConfigPath: kubeadmconstants.GetAdminKubeConfigPath(),
+		kubeConfigPath: constants.GetAdminKubeConfigPath(),
 		out:            out,
 	}
 

cmd/kubeadm/app/cmd/upgrade/node.go

@@ -29,7 +29,6 @@ import (
 	phases "k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/upgrade/node"
 	"k8s.io/kubernetes/cmd/kubeadm/app/cmd/phases/workflow"
 	"k8s.io/kubernetes/cmd/kubeadm/app/constants"
-	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
 	configutil "k8s.io/kubernetes/cmd/kubeadm/app/util/config"
 )
 
@@ -130,7 +129,7 @@ func newNodeData(cmd *cobra.Command, args []string, options *nodeOptions) (*node
 	// isControlPlane checks if a node is a control-plane node by looking up
 	// the kube-apiserver manifest file
 	isControlPlaneNode := true
-	filepath := kubeadmconstants.GetStaticPodFilepath(kubeadmconstants.KubeAPIServer, kubeadmconstants.GetStaticPodDirectory())
+	filepath := constants.GetStaticPodFilepath(constants.KubeAPIServer, constants.GetStaticPodDirectory())
 	if _, err := os.Stat(filepath); os.IsNotExist(err) {
 		isControlPlaneNode = false
 	}

cmd/kubeadm/app/phases/upgrade/staticpods.go

@@ -32,7 +32,6 @@ import (
 	certsphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/certs"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/certs/renewal"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane"
-	controlplanephase "k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane"
 	etcdphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/etcd"
 	"k8s.io/kubernetes/cmd/kubeadm/app/util"
 	"k8s.io/kubernetes/cmd/kubeadm/app/util/apiclient"
@@ -464,7 +463,7 @@ func StaticPodControlPlane(client clientset.Interface, waiter apiclient.Waiter,
 
 	// Write the updated static Pod manifests into the temporary directory
 	fmt.Printf("[upgrade/staticpods] Writing new Static Pod manifests to %q\n", pathMgr.TempManifestDir())
-	err = controlplanephase.CreateInitStaticPodManifestFiles(pathMgr.TempManifestDir(), pathMgr.KustomizeDir(), cfg)
+	err = controlplane.CreateInitStaticPodManifestFiles(pathMgr.TempManifestDir(), pathMgr.KustomizeDir(), cfg)
 	if err != nil {
 		return errors.Wrap(err, "error creating init static pod manifest files")
 	}

cmd/kubeadm/app/phases/upgrade/staticpods_test.go

@@ -35,7 +35,6 @@ import (
 	certutil "k8s.io/client-go/util/cert"
 	kubeadmapi "k8s.io/kubernetes/cmd/kubeadm/app/apis/kubeadm"
 	"k8s.io/kubernetes/cmd/kubeadm/app/constants"
-	kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
 	certsphase "k8s.io/kubernetes/cmd/kubeadm/app/phases/certs"
 	"k8s.io/kubernetes/cmd/kubeadm/app/phases/certs/renewal"
 	controlplanephase "k8s.io/kubernetes/cmd/kubeadm/app/phases/controlplane"
@@ -432,7 +431,7 @@ func TestStaticPodControlPlane(t *testing.T) {
 			moveFileFunc: func(oldPath, newPath string) error {
 				return os.Rename(oldPath, newPath)
 			},
-			skipKubeConfig:       kubeadmconstants.SchedulerKubeConfigFileName,
+			skipKubeConfig:       constants.SchedulerKubeConfigFileName,
 			expectedErr:          true,
 			manifestShouldChange: false,
 		},
@@ -446,7 +445,7 @@ func TestStaticPodControlPlane(t *testing.T) {
 			moveFileFunc: func(oldPath, newPath string) error {
 				return os.Rename(oldPath, newPath)
 			},
-			skipKubeConfig:       kubeadmconstants.AdminKubeConfigFileName,
+			skipKubeConfig:       constants.AdminKubeConfigFileName,
 			expectedErr:          true,
 			manifestShouldChange: false,
 		},
@@ -488,9 +487,9 @@ func TestStaticPodControlPlane(t *testing.T) {
 			}
 
 			for _, kubeConfig := range []string{
-				kubeadmconstants.AdminKubeConfigFileName,
-				kubeadmconstants.SchedulerKubeConfigFileName,
-				kubeadmconstants.ControllerManagerKubeConfigFileName,
+				constants.AdminKubeConfigFileName,
+				constants.SchedulerKubeConfigFileName,
+				constants.ControllerManagerKubeConfigFileName,
 			} {
 				if rt.skipKubeConfig == kubeConfig {
 					continue
@@ -743,14 +742,14 @@ func TestRenewCertsByComponent(t *testing.T) {
 			name:      "all CA exist, should be rotated for scheduler",
 			component: constants.KubeScheduler,
 			kubeConfigShouldExist: []string{
-				kubeadmconstants.SchedulerKubeConfigFileName,
+				constants.SchedulerKubeConfigFileName,
 			},
 		},
 		{
 			name:      "all CA exist, should be rotated for controller manager",
 			component: constants.KubeControllerManager,
 			kubeConfigShouldExist: []string{
-				kubeadmconstants.ControllerManagerKubeConfigFileName,
+				constants.ControllerManagerKubeConfigFileName,
 			},
 		},
 		{
@@ -850,7 +849,7 @@ func TestRenewCertsByComponent(t *testing.T) {
 					t.Errorf("couldn't load new certificate %q: %v", kubeCert.Name, err)
 					continue
 				}
-				oldSerial, _ := certMaps[kubeCert.Name]
+				oldSerial := certMaps[kubeCert.Name]
 
 				shouldBeRenewed := true
 				if test.certsShouldBeRenewed != nil {
@@ -876,7 +875,7 @@ func TestRenewCertsByComponent(t *testing.T) {
 				if err != nil {
 					t.Fatalf("error reading embedded certs from %s: %v", kubeConfig, err)
 				}
-				oldSerial, _ := certMaps[kubeConfig]
+				oldSerial := certMaps[kubeConfig]
 				if oldSerial.Cmp(newCerts[0].SerialNumber) == 0 {
 					t.Errorf("certifitate %v was not reissued", kubeConfig)
 				}

cmd/kubeadm/app/util/initsystem/initsystem_unix.go

@@ -121,20 +121,14 @@ func (sysd SystemdInitSystem) ServiceExists(service string) bool {
 	args := []string{"status", service}
 	outBytes, _ := exec.Command("systemctl", args...).Output()
 	output := string(outBytes)
-	if strings.Contains(output, "Loaded: not-found") {
-		return false
-	}
-	return true
+	return !strings.Contains(output, "Loaded: not-found")
 }
 
 // ServiceIsEnabled ensures the service is enabled to start on each boot.
 func (sysd SystemdInitSystem) ServiceIsEnabled(service string) bool {
 	args := []string{"is-enabled", service}
 	err := exec.Command("systemctl", args...).Run()
-	if err != nil {
-		return false
-	}
-	return true
+	return err == nil
 }
 
 // ServiceIsActive will check is the service is "active". In the case of