fix

cloud/scope/managedcontrolplane.go

@@ -173,6 +173,7 @@ func (s *ManagedControlPlaneScope) GetCredential() *Credential {
 	return s.credential
 }
 
+// GetAllNodePools gets all node pools for the control plane.
 func (s *ManagedControlPlaneScope) GetAllNodePools(ctx context.Context) ([]infrav1exp.GCPManagedMachinePool, error) {
 	if s.AllNodePools == nil {
 		opt1 := client.InNamespace(s.GCPManagedControlPlane.Namespace)
@@ -190,18 +191,15 @@ func (s *ManagedControlPlaneScope) GetAllNodePools(ctx context.Context) ([]infra
 	return s.AllNodePools, nil
 }
 
-func parseLocation(location string) (region string, zone *string) {
+func parseLocation(location string) string {
 	parts := strings.Split(location, "-")
-	region = strings.Join(parts[:2], "-")
-	if len(parts) == 3 {
-		return region, &parts[2]
-	}
-	return region, nil
+	region := strings.Join(parts[:2], "-")
+	return region
 }
 
 // Region returns the region of the GKE cluster.
 func (s *ManagedControlPlaneScope) Region() string {
-	region, _ := parseLocation(s.GCPManagedControlPlane.Spec.Location)
+	region := parseLocation(s.GCPManagedControlPlane.Spec.Location)
 	return region
 }
 

cloud/scope/managedmachinepool.go

@@ -19,12 +19,13 @@ package scope
 import (
 	"context"
 	"fmt"
+	"strings"
+
 	"google.golang.org/api/option"
 	"sigs.k8s.io/cluster-api/util/conditions"
-	"strings"
 
-	"cloud.google.com/go/compute/apiv1"
-	"cloud.google.com/go/container/apiv1"
+	compute "cloud.google.com/go/compute/apiv1"
+	container "cloud.google.com/go/container/apiv1"
 	"cloud.google.com/go/container/apiv1/containerpb"
 	"github.com/pkg/errors"
 	infrav1exp "sigs.k8s.io/cluster-api-provider-gcp/exp/api/v1beta1"
@@ -35,13 +36,13 @@ import (
 
 // ManagedMachinePoolScopeParams defines the input parameters used to create a new Scope.
 type ManagedMachinePoolScopeParams struct {
-	ManagedClusterClient *container.ClusterManagerClient
+	ManagedClusterClient        *container.ClusterManagerClient
 	InstanceGroupManagersClient *compute.InstanceGroupManagersClient
-	Client     client.Client
-	Cluster    *clusterv1.Cluster
-	GCPManagedCluster      *infrav1exp.GCPManagedCluster
-	GCPManagedControlPlane *infrav1exp.GCPManagedControlPlane
-	GCPManagedMachinePool *infrav1exp.GCPManagedMachinePool
+	Client                      client.Client
+	Cluster                     *clusterv1.Cluster
+	GCPManagedCluster           *infrav1exp.GCPManagedCluster
+	GCPManagedControlPlane      *infrav1exp.GCPManagedControlPlane
+	GCPManagedMachinePool       *infrav1exp.GCPManagedMachinePool
 }
 
 // NewManagedMachinePoolScope creates a new Scope from the supplied parameters.
@@ -94,13 +95,13 @@ func NewManagedMachinePoolScope(ctx context.Context, params ManagedMachinePoolSc
 	}
 
 	return &ManagedMachinePoolScope{
-		client:      params.Client,
-		Cluster:     params.Cluster,
+		client:                 params.Client,
+		Cluster:                params.Cluster,
 		GCPManagedControlPlane: params.GCPManagedControlPlane,
 		GCPManagedMachinePool:  params.GCPManagedMachinePool,
-		mcClient: params.ManagedClusterClient,
-		migClient: params.InstanceGroupManagersClient,
-		patchHelper: helper,
+		mcClient:               params.ManagedClusterClient,
+		migClient:              params.InstanceGroupManagersClient,
+		patchHelper:            helper,
 	}, nil
 }
 
@@ -109,12 +110,12 @@ type ManagedMachinePoolScope struct {
 	client      client.Client
 	patchHelper *patch.Helper
 
-	Cluster    *clusterv1.Cluster
+	Cluster                *clusterv1.Cluster
 	GCPManagedCluster      *infrav1exp.GCPManagedCluster
 	GCPManagedControlPlane *infrav1exp.GCPManagedControlPlane
-	GCPManagedMachinePool *infrav1exp.GCPManagedMachinePool
-	mcClient *container.ClusterManagerClient
-	migClient *compute.InstanceGroupManagersClient
+	GCPManagedMachinePool  *infrav1exp.GCPManagedMachinePool
+	mcClient               *container.ClusterManagerClient
+	migClient              *compute.InstanceGroupManagersClient
 }
 
 // PatchObject persists the managed control plane configuration and status.
@@ -137,37 +138,42 @@ func (s *ManagedMachinePoolScope) Close() error {
 	return s.PatchObject()
 }
 
+// ConditionSetter return a condition setter (which is GCPManagedMachinePool itself).
 func (s *ManagedMachinePoolScope) ConditionSetter() conditions.Setter {
 	return s.GCPManagedMachinePool
 }
 
+// ManagedMachinePoolClient returns a client used to interact with GKE.
 func (s *ManagedMachinePoolScope) ManagedMachinePoolClient() *container.ClusterManagerClient {
 	return s.mcClient
 }
 
+// InstanceGroupManagersClient returns a client used to interact with GCP MIG.
 func (s *ManagedMachinePoolScope) InstanceGroupManagersClient() *compute.InstanceGroupManagersClient {
 	return s.migClient
 }
 
-func ParseInstanceGroupUrl(url string) (project string, zone string, mig string) {
+// ParseInstanceGroupURL parses an instance group URL.
+func ParseInstanceGroupURL(url string) (project string, zone string, mig string) {
 	parts := strings.Split(url, "/")
 	if len(parts) < 11 {
 		return "", "", ""
 	}
 	return parts[6], parts[8], parts[10]
 }
 
+// ConvertToSdkNodePool convertsSetReplicas a node pool to format that is used by GCP SDK.
 func ConvertToSdkNodePool(nodePool infrav1exp.GCPManagedMachinePool) *containerpb.NodePool {
 	nodePoolName := nodePool.Spec.NodePoolName
 	if len(nodePoolName) == 0 {
 		nodePoolName = nodePool.Name
 	}
 	sdkNodePool := containerpb.NodePool{
-		Name: nodePoolName,
+		Name:             nodePoolName,
 		InitialNodeCount: nodePool.Spec.NodeCount,
 		Config: &containerpb.NodeConfig{
-			Labels: nodePool.Spec.KubernetesLabels,
-			Taints: infrav1exp.ConvertToSdkTaint(nodePool.Spec.KubernetesTaints),
+			Labels:   nodePool.Spec.KubernetesLabels,
+			Taints:   infrav1exp.ConvertToSdkTaint(nodePool.Spec.KubernetesTaints),
 			Metadata: nodePool.Spec.AdditionalLabels,
 		},
 	}
@@ -177,6 +183,7 @@ func ConvertToSdkNodePool(nodePool infrav1exp.GCPManagedMachinePool) *containerp
 	return &sdkNodePool
 }
 
+// ConvertToSdkNodePools converts node pools to format that is used by GCP SDK.
 func ConvertToSdkNodePools(nodePools []infrav1exp.GCPManagedMachinePool) []*containerpb.NodePool {
 	res := []*containerpb.NodePool{}
 	for _, nodePool := range nodePools {
@@ -185,27 +192,31 @@ func ConvertToSdkNodePools(nodePools []infrav1exp.GCPManagedMachinePool) []*cont
 	return res
 }
 
+// SetReplicas sets the replicas count in status.
 func (s *ManagedMachinePoolScope) SetReplicas(replicas int32) {
 	s.GCPManagedMachinePool.Status.Replicas = replicas
 }
 
+// NodePoolName returns the node pool name.
 func (s *ManagedMachinePoolScope) NodePoolName() string {
 	if len(s.GCPManagedMachinePool.Spec.NodePoolName) > 0 {
 		return s.GCPManagedMachinePool.Spec.NodePoolName
-	} else {
-		return s.GCPManagedMachinePool.Name
 	}
+	return s.GCPManagedMachinePool.Name
 }
 
+// Region returns the region of the GKE node pool.
 func (s *ManagedMachinePoolScope) Region() string {
-	region, _ := parseLocation(s.GCPManagedControlPlane.Spec.Location)
+	region := parseLocation(s.GCPManagedControlPlane.Spec.Location)
 	return region
 }
 
+// NodePoolLocation returns the location of the node pool.
 func (s *ManagedMachinePoolScope) NodePoolLocation() string {
 	return fmt.Sprintf("projects/%s/locations/%s/clusters/%s", s.GCPManagedControlPlane.Spec.Project, s.Region(), s.GCPManagedControlPlane.Spec.ClusterName)
 }
 
+// NodePoolFullName returns the full name of the node pool.
 func (s *ManagedMachinePoolScope) NodePoolFullName() string {
 	return fmt.Sprintf("%s/nodePools/%s", s.NodePoolLocation(), s.NodePoolName())
 }

cloud/services/container/clusters/reconcile.go

@@ -19,6 +19,7 @@ package clusters
 import (
 	"context"
 	"fmt"
+
 	"sigs.k8s.io/cluster-api-provider-gcp/cloud/scope"
 
 	"cloud.google.com/go/container/apiv1/containerpb"
@@ -216,7 +217,7 @@ func (s *Service) createCluster(ctx context.Context) error {
 
 	nodePools, _ := s.scope.GetAllNodePools(ctx)
 	cluster := &containerpb.Cluster{
-		Name: s.scope.GCPManagedControlPlane.Spec.ClusterName,
+		Name:    s.scope.GCPManagedControlPlane.Spec.ClusterName,
 		Network: *s.scope.GCPManagedCluster.Spec.Network.Name,
 		Autopilot: &containerpb.Autopilot{
 			Enabled: false,
@@ -231,7 +232,7 @@ func (s *Service) createCluster(ctx context.Context) error {
 	}
 	createClusterRequest := &containerpb.CreateClusterRequest{
 		Cluster: cluster,
-		Parent: s.scope.ClusterLocation(),
+		Parent:  s.scope.ClusterLocation(),
 	}
 	_, err := s.scope.ManagedControlPlaneClient().CreateCluster(ctx, createClusterRequest)
 	if err != nil {

cloud/services/container/nodepools/doc.go

@@ -14,5 +14,5 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// Package instances implements reconciler for GKE node pool components.
+// Package nodepools implements reconciler for GKE node pool components.
 package nodepools

cloud/services/container/nodepools/reconcile.go

@@ -17,15 +17,17 @@ limitations under the License.
 package nodepools
 
 import (
-	"cloud.google.com/go/container/apiv1/containerpb"
 	"context"
 	"fmt"
-	"github.com/googleapis/gax-go/v2/apierror"
-	"github.com/pkg/errors"
+	"reflect"
+
 	"google.golang.org/api/iterator"
-	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
 	"google.golang.org/grpc/codes"
-	"reflect"
+
+	"cloud.google.com/go/compute/apiv1/computepb"
+	"cloud.google.com/go/container/apiv1/containerpb"
+	"github.com/googleapis/gax-go/v2/apierror"
+	"github.com/pkg/errors"
 	"sigs.k8s.io/cluster-api-provider-gcp/cloud/scope"
 	infrav1exp "sigs.k8s.io/cluster-api-provider-gcp/exp/api/v1beta1"
 	"sigs.k8s.io/cluster-api-provider-gcp/util/reconciler"
@@ -110,7 +112,7 @@ func (s *Service) Reconcile(ctx context.Context) (ctrl.Result, error) {
 		return ctrl.Result{}, nil
 	}
 
-	needUpdateVersionOrImage, nodePoolUpdateVersionOrImage := s.checkDiffAndPrepareUpdateVersionOrImage(*nodePool)
+	needUpdateVersionOrImage, nodePoolUpdateVersionOrImage := s.checkDiffAndPrepareUpdateVersionOrImage(nodePool)
 	if needUpdateVersionOrImage {
 		log.Info("Version/image update required")
 		err = s.updateNodePoolVersionOrImage(ctx, nodePoolUpdateVersionOrImage)
@@ -123,7 +125,7 @@ func (s *Service) Reconcile(ctx context.Context) (ctrl.Result, error) {
 		return ctrl.Result{}, nil
 	}
 
-	needUpdateSize, setNodePoolSizeRequest := s.checkDiffAndPrepareUpdateSize(*nodePool)
+	needUpdateSize, setNodePoolSizeRequest := s.checkDiffAndPrepareUpdateSize(nodePool)
 	if needUpdateSize {
 		log.Info("Size update required")
 		err = s.updateNodePoolSize(ctx, setNodePoolSizeRequest)
@@ -217,14 +219,14 @@ func (s *Service) getInstances(ctx context.Context, nodePool *containerpb.NodePo
 	instances := []*computepb.ManagedInstance{}
 
 	for _, url := range nodePool.InstanceGroupUrls {
-		project, zone, mig := scope.ParseInstanceGroupUrl(url)
+		project, zone, mig := scope.ParseInstanceGroupURL(url)
 		if mig == "" {
-			return nil, errors.New(fmt.Sprintf("fail to parse instance group url %s", url))
+			return nil, fmt.Errorf("fail to parse instance group url %s", url)
 		}
 		listManagedInstancesRequest := &computepb.ListManagedInstancesInstanceGroupManagersRequest{
 			InstanceGroupManager: mig,
-			Project: project,
-			Zone: zone,
+			Project:              project,
+			Zone:                 zone,
 		}
 		iter := s.scope.InstanceGroupManagersClient().ListManagedInstances(ctx, listManagedInstancesRequest)
 		for {
@@ -245,7 +247,7 @@ func (s *Service) getInstances(ctx context.Context, nodePool *containerpb.NodePo
 func (s *Service) createNodePool(ctx context.Context) error {
 	createNodePoolRequest := &containerpb.CreateNodePoolRequest{
 		NodePool: scope.ConvertToSdkNodePool(*s.scope.GCPManagedMachinePool),
-		Parent: s.scope.NodePoolLocation(),
+		Parent:   s.scope.NodePoolLocation(),
 	}
 	_, err := s.scope.ManagedMachinePoolClient().CreateNodePool(ctx, createNodePoolRequest)
 	if err != nil {
@@ -285,7 +287,7 @@ func (s *Service) deleteNodePool(ctx context.Context) error {
 	return nil
 }
 
-func (s *Service) checkDiffAndPrepareUpdateVersionOrImage(existingNodePool containerpb.NodePool) (bool, *containerpb.UpdateNodePoolRequest) {
+func (s *Service) checkDiffAndPrepareUpdateVersionOrImage(existingNodePool *containerpb.NodePool) (bool, *containerpb.UpdateNodePoolRequest) {
 	needUpdate := false
 	updateNodePoolRequest := containerpb.UpdateNodePoolRequest{
 		Name: s.scope.NodePoolFullName(),
@@ -313,7 +315,7 @@ func (s *Service) checkDiffAndPrepareUpdateVersionOrImage(existingNodePool conta
 	return needUpdate, &updateNodePoolRequest
 }
 
-func (s *Service) checkDiffAndPrepareUpdateSize(existingNodePool containerpb.NodePool) (bool, *containerpb.SetNodePoolSizeRequest) {
+func (s *Service) checkDiffAndPrepareUpdateSize(existingNodePool *containerpb.NodePool) (bool, *containerpb.SetNodePoolSizeRequest) {
 	needUpdate := false
 	setNodePoolSizeRequest := containerpb.SetNodePoolSizeRequest{
 		Name: s.scope.NodePoolFullName(),

exp/api/v1beta1/types.go

@@ -35,16 +35,6 @@ type Taint struct {
 // Taints is an array of Taints.
 type Taints []Taint
 
-// MachinePoolMode represents the mode of operation for the machine pool.
-type MachinePoolMode string
-
-const (
-	// MachinePoolModeSystem represents a system machine pool.
-	MachinePoolModeSystem MachinePoolMode = "system"
-	// MachinePoolModeUser represenyts a user machine pool.
-	MachinePoolModeUser MachinePoolMode = "user"
-)
-
 func convertToSdkTaintEffect(effect TaintEffect) containerpb.NodeTaint_Effect {
 	switch effect {
 	case "NoSchedule":
@@ -58,15 +48,16 @@ func convertToSdkTaintEffect(effect TaintEffect) containerpb.NodeTaint_Effect {
 	}
 }
 
+// ConvertToSdkTaint converts taints to format that is used by GCP SDK.
 func ConvertToSdkTaint(taints Taints) []*containerpb.NodeTaint {
 	if taints == nil {
 		return nil
 	}
 	res := []*containerpb.NodeTaint{}
 	for _, taint := range taints {
 		res = append(res, &containerpb.NodeTaint{
-			Key: taint.Key,
-			Value: taint.Value,
+			Key:    taint.Key,
+			Value:  taint.Value,
 			Effect: convertToSdkTaintEffect(taint.Effect),
 		})
 	}