Clean up staticcheck issues for gce.

Dealing with deprecated issues. (staticcheck SA1019)
Dealing with error discard issue. (staticcheck SA4006)
Dealing with context overwritten issue. (staticcheck SA4009)
Dealing with unused functions. (staticcheck U1000)
Remove gce from staticcheck failure list

hack/.staticcheck_failures

@@ -251,7 +251,6 @@ vendor/k8s.io/kubectl/pkg/describe/versioned
 vendor/k8s.io/kubectl/pkg/scale
 vendor/k8s.io/legacy-cloud-providers/aws
 vendor/k8s.io/legacy-cloud-providers/azure
-vendor/k8s.io/legacy-cloud-providers/gce
 vendor/k8s.io/legacy-cloud-providers/vsphere
 vendor/k8s.io/metrics/pkg/client/custom_metrics
 vendor/k8s.io/sample-controller

staging/src/k8s.io/legacy-cloud-providers/gce/gce.go

@@ -863,7 +863,7 @@ func newOauthClient(tokenSource oauth2.TokenSource) (*http.Client, error) {
 	if tokenSource == nil {
 		var err error
 		tokenSource, err = google.DefaultTokenSource(
-			oauth2.NoContext,
+			context.Background(),
 			compute.CloudPlatformScope,
 			compute.ComputeScope)
 		klog.Infof("Using DefaultTokenSource %#v", tokenSource)
@@ -890,7 +890,7 @@ func newOauthClient(tokenSource oauth2.TokenSource) (*http.Client, error) {
 		return nil, err
 	}
 
-	return oauth2.NewClient(oauth2.NoContext, tokenSource), nil
+	return oauth2.NewClient(context.Background(), tokenSource), nil
 }
 
 func (manager *gceServiceManager) getProjectsAPIEndpoint() string {
@@ -901,12 +901,3 @@ func (manager *gceServiceManager) getProjectsAPIEndpoint() string {
 
 	return projectsAPIEndpoint
 }
-
-func (manager *gceServiceManager) getProjectsAPIEndpointBeta() string {
-	projectsAPIEndpoint := gceComputeAPIEndpointBeta + "projects/"
-	if manager.gce.service != nil {
-		projectsAPIEndpoint = manager.gce.serviceBeta.BasePath
-	}
-
-	return projectsAPIEndpoint
-}

staging/src/k8s.io/legacy-cloud-providers/gce/gce_alpha.go

@@ -18,10 +18,6 @@ limitations under the License.
 
 package gce
 
-import (
-	"fmt"
-)
-
 const (
 	// AlphaFeatureNetworkTiers allows Services backed by a GCP load balancer to choose
 	// what network tier to use. Currently supports "Standard" and "Premium" (default).
@@ -54,10 +50,3 @@ func NewAlphaFeatureGate(features []string) *AlphaFeatureGate {
 	}
 	return &AlphaFeatureGate{featureMap}
 }
-
-func (g *Cloud) alphaFeatureEnabled(feature string) error {
-	if !g.AlphaFeatureGate.Enabled(feature) {
-		return fmt.Errorf("alpha feature %q is not enabled", feature)
-	}
-	return nil
-}

staging/src/k8s.io/legacy-cloud-providers/gce/gce_instances.go

@@ -111,7 +111,7 @@ func (g *Cloud) NodeAddresses(_ context.Context, _ types.NodeName) ([]v1.NodeAdd
 // NodeAddressesByProviderID will not be called from the node that is requesting this ID.
 // i.e. metadata service and other local methods cannot be used here
 func (g *Cloud) NodeAddressesByProviderID(ctx context.Context, providerID string) ([]v1.NodeAddress, error) {
-	ctx, cancel := cloud.ContextWithCallTimeout()
+	timeoutCtx, cancel := cloud.ContextWithCallTimeout()
 	defer cancel()
 
 	_, zone, name, err := splitProviderID(providerID)
@@ -119,7 +119,7 @@ func (g *Cloud) NodeAddressesByProviderID(ctx context.Context, providerID string
 		return []v1.NodeAddress{}, err
 	}
 
-	instance, err := g.c.Instances().Get(ctx, meta.ZonalKey(canonicalizeInstanceName(name), zone))
+	instance, err := g.c.Instances().Get(timeoutCtx, meta.ZonalKey(canonicalizeInstanceName(name), zone))
 	if err != nil {
 		return []v1.NodeAddress{}, fmt.Errorf("error while querying for providerID %q: %v", providerID, err)
 	}

staging/src/k8s.io/legacy-cloud-providers/gce/gce_loadbalancer_external_test.go

@@ -571,6 +571,7 @@ func TestTargetPoolNeedsRecreation(t *testing.T) {
 	require.NoError(t, err)
 	hostNames := nodeNames(nodes)
 	hosts, err := gce.getInstancesByNames(hostNames)
+	require.NoError(t, err)
 
 	var instances []string
 	for _, host := range hosts {
@@ -762,6 +763,7 @@ func TestFirewallNeedsUpdate(t *testing.T) {
 			fw.Allowed[0].IPProtocol = "tcp"
 			fw.SourceRanges[0] = trueSourceRange
 			fw, err = gce.GetFirewall(MakeFirewallName(tc.lbName))
+			require.NoError(t, err)
 			require.Equal(t, fw.Allowed[0].IPProtocol, "tcp")
 			require.Equal(t, fw.SourceRanges[0], trueSourceRange)
 
@@ -801,6 +803,7 @@ func TestEnsureTargetPoolAndHealthCheck(t *testing.T) {
 
 	hostNames := nodeNames(nodes)
 	hosts, err := gce.getInstancesByNames(hostNames)
+	require.NoError(t, err)
 	clusterID := vals.ClusterID
 
 	ipAddr := status.Ingress[0].IP
@@ -813,15 +816,19 @@ func TestEnsureTargetPoolAndHealthCheck(t *testing.T) {
 	// Apply a tag on the target pool. By verifying the change of the tag, target pool update can be ensured.
 	tag := "A Tag"
 	pool, err := gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	pool.CreationTimestamp = tag
 	pool, err = gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	require.Equal(t, tag, pool.CreationTimestamp)
 	err = gce.ensureTargetPoolAndHealthCheck(true, true, svc, lbName, clusterID, ipAddr, hosts, hcToCreate, hcToDelete)
 	assert.NoError(t, err)
 	pool, err = gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	assert.NotEqual(t, pool.CreationTimestamp, tag)
 
 	pool, err = gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	assert.Equal(t, 1, len(pool.Instances))
 	var manyNodeName [maxTargetPoolCreateInstances + 1]string
 	for i := 0; i < maxTargetPoolCreateInstances+1; i++ {
@@ -831,15 +838,18 @@ func TestEnsureTargetPoolAndHealthCheck(t *testing.T) {
 	require.NoError(t, err)
 	manyHostNames := nodeNames(manyNodes)
 	manyHosts, err := gce.getInstancesByNames(manyHostNames)
+	require.NoError(t, err)
 	err = gce.ensureTargetPoolAndHealthCheck(true, true, svc, lbName, clusterID, ipAddr, manyHosts, hcToCreate, hcToDelete)
 	assert.NoError(t, err)
 
 	pool, err = gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	assert.Equal(t, maxTargetPoolCreateInstances+1, len(pool.Instances))
 
 	err = gce.ensureTargetPoolAndHealthCheck(true, false, svc, lbName, clusterID, ipAddr, hosts, hcToCreate, hcToDelete)
 	assert.NoError(t, err)
 	pool, err = gce.GetTargetPool(lbName, region)
+	require.NoError(t, err)
 	assert.Equal(t, 1, len(pool.Instances))
 }
 
@@ -1011,6 +1021,7 @@ func TestEnsureExternalLoadBalancerErrors(t *testing.T) {
 	} {
 		t.Run(desc, func(t *testing.T) {
 			gce, err := fakeGCECloud(DefaultTestClusterValues())
+			require.NoError(t, err)
 			nodes, err := createAndInsertNodes(gce, []string{"test-node-1"}, vals.ZoneName)
 			require.NoError(t, err)
 			svc := fakeLoadbalancerService("")

staging/src/k8s.io/legacy-cloud-providers/gce/gce_loadbalancer_internal_test.go

@@ -64,6 +64,7 @@ func TestEnsureInternalBackendServiceUpdates(t *testing.T) {
 	svc := fakeLoadbalancerService(string(LBTypeInternal))
 	lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
 	nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
+	require.NoError(t, err)
 	igName := makeInstanceGroupName(vals.ClusterID)
 	igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
 	require.NoError(t, err)
@@ -110,6 +111,7 @@ func TestEnsureInternalBackendServiceGroups(t *testing.T) {
 			svc := fakeLoadbalancerService(string(LBTypeInternal))
 			lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
 			nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
+			require.NoError(t, err)
 			igName := makeInstanceGroupName(vals.ClusterID)
 			igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
 			require.NoError(t, err)
@@ -180,6 +182,7 @@ func TestEnsureInternalLoadBalancerWithExistingResources(t *testing.T) {
 	require.NoError(t, err)
 
 	nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
+	require.NoError(t, err)
 	igName := makeInstanceGroupName(vals.ClusterID)
 	igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
 	require.NoError(t, err)
@@ -499,6 +502,7 @@ func TestClearPreviousInternalResources(t *testing.T) {
 	err = gce.ensureInternalBackendService(svc.ObjectMeta.Name, "", svc.Spec.SessionAffinity, cloud.SchemeInternal, v1.ProtocolTCP, []string{}, "")
 	require.NoError(t, err)
 	backendSvc, err := gce.GetRegionBackendService(svc.ObjectMeta.Name, gce.region)
+	require.NoError(t, err)
 	backendSvc.HealthChecks = []string{hc1.SelfLink, hc2.SelfLink}
 
 	c.MockRegionBackendServices.DeleteHook = mock.DeleteRegionBackendServicesErrHook
@@ -747,6 +751,7 @@ func TestEnsureInternalLoadBalancerErrors(t *testing.T) {
 	} {
 		t.Run(desc, func(t *testing.T) {
 			gce, err := fakeGCECloud(DefaultTestClusterValues())
+			require.NoError(t, err)
 			nodes, err := createAndInsertNodes(gce, []string{"test-node-1"}, vals.ZoneName)
 			require.NoError(t, err)
 			params = newEnsureILBParams(nodes)

staging/src/k8s.io/legacy-cloud-providers/gce/gce_routes.go

@@ -40,13 +40,13 @@ func newRoutesMetricContext(request string) *metricContext {
 
 // ListRoutes in the cloud environment.
 func (g *Cloud) ListRoutes(ctx context.Context, clusterName string) ([]*cloudprovider.Route, error) {
-	ctx, cancel := cloud.ContextWithCallTimeout()
+	timeoutCtx, cancel := cloud.ContextWithCallTimeout()
 	defer cancel()
 
 	mc := newRoutesMetricContext("list")
 	prefix := truncateClusterName(clusterName)
 	f := filter.Regexp("name", prefix+"-.*").AndRegexp("network", g.NetworkURL()).AndRegexp("description", k8sNodeRouteTag)
-	routes, err := g.c.Routes().List(ctx, f)
+	routes, err := g.c.Routes().List(timeoutCtx, f)
 	if err != nil {
 		return nil, mc.Observe(err)
 	}
@@ -66,7 +66,7 @@ func (g *Cloud) ListRoutes(ctx context.Context, clusterName string) ([]*cloudpro
 
 // CreateRoute in the cloud environment.
 func (g *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint string, route *cloudprovider.Route) error {
-	ctx, cancel := cloud.ContextWithCallTimeout()
+	timeoutCtx, cancel := cloud.ContextWithCallTimeout()
 	defer cancel()
 
 	mc := newRoutesMetricContext("create")
@@ -84,7 +84,7 @@ func (g *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint st
 		Priority:        1000,
 		Description:     k8sNodeRouteTag,
 	}
-	err = g.c.Routes().Insert(ctx, meta.GlobalKey(cr.Name), cr)
+	err = g.c.Routes().Insert(timeoutCtx, meta.GlobalKey(cr.Name), cr)
 	if isHTTPErrorCode(err, http.StatusConflict) {
 		klog.Infof("Route %q already exists.", cr.Name)
 		err = nil
@@ -94,11 +94,11 @@ func (g *Cloud) CreateRoute(ctx context.Context, clusterName string, nameHint st
 
 // DeleteRoute from the cloud environment.
 func (g *Cloud) DeleteRoute(ctx context.Context, clusterName string, route *cloudprovider.Route) error {
-	ctx, cancel := cloud.ContextWithCallTimeout()
+	timeoutCtx, cancel := cloud.ContextWithCallTimeout()
 	defer cancel()
 
 	mc := newRoutesMetricContext("delete")
-	return mc.Observe(g.c.Routes().Delete(ctx, meta.GlobalKey(route.Name)))
+	return mc.Observe(g.c.Routes().Delete(timeoutCtx, meta.GlobalKey(route.Name)))
 }
 
 func truncateClusterName(clusterName string) string {

staging/src/k8s.io/legacy-cloud-providers/gce/token_source.go

@@ -19,6 +19,7 @@ limitations under the License.
 package gce
 
 import (
+	"context"
 	"encoding/json"
 	"net/http"
 	"strings"
@@ -106,7 +107,7 @@ func (a *AltTokenSource) token() (*oauth2.Token, error) {
 
 // NewAltTokenSource constructs a new alternate token source for generating tokens.
 func NewAltTokenSource(tokenURL, tokenBody string) oauth2.TokenSource {
-	client := oauth2.NewClient(oauth2.NoContext, google.ComputeTokenSource(""))
+	client := oauth2.NewClient(context.Background(), google.ComputeTokenSource(""))
 	a := &AltTokenSource{
 		oauthClient: client,
 		tokenURL:    tokenURL,