feat(kubernetes): add method for getting available kubernetes plans (#224)

Author: kangasta

CHANGELOG.md

@@ -5,6 +5,9 @@ See updating [Changelog example here](https://keepachangelog.com/en/1.0.0/)
 
 ## [Unreleased]
 
+### Added
+- method for fetching available kubernetes plans
+
 ## [6.1.0]
 
 ### Added

upcloud/kubernetes.go

@@ -60,3 +60,9 @@ type KubernetesTaint struct {
 	Key    string                       `json:"key"`
 	Value  string                       `json:"value"`
 }
+
+type KubernetesPlan struct {
+	Name         string `json:"name"`
+	ServerNumber int    `json:"server_number"`
+	MaxNodes     int    `json:"max_nodes"`
+}

upcloud/request/kubernetes.go

@@ -165,3 +165,9 @@ type DeleteKubernetesNodeGroupRequest struct {
 func (r *DeleteKubernetesNodeGroupRequest) RequestURL() string {
 	return fmt.Sprintf("%s/%s/node-groups/%s", kubernetesClusterBasePath, r.ClusterUUID, r.Name)
 }
+
+type GetKubernetesPlansRequest struct{}
+
+func (r *GetKubernetesPlansRequest) RequestURL() string {
+	return fmt.Sprintf("%s/plans", kubernetesClusterBasePath)
+}

upcloud/service/kubernetes.go

@@ -22,6 +22,7 @@ type Kubernetes interface {
 	CreateKubernetesNodeGroup(ctx context.Context, r *request.CreateKubernetesNodeGroupRequest) (*upcloud.KubernetesNodeGroup, error)
 	ModifyKubernetesNodeGroup(ctx context.Context, r *request.ModifyKubernetesNodeGroupRequest) (*upcloud.KubernetesNodeGroup, error)
 	DeleteKubernetesNodeGroup(ctx context.Context, r *request.DeleteKubernetesNodeGroupRequest) error
+	GetKubernetesPlans(ctx context.Context, r *request.GetKubernetesPlansRequest) ([]upcloud.KubernetesPlan, error)
 }
 
 // GetKubernetesClusters retrieves a list of Kubernetes clusters (EXPERIMENTAL).
@@ -144,3 +145,9 @@ func (s *Service) ModifyKubernetesNodeGroup(ctx context.Context, r *request.Modi
 func (s *Service) DeleteKubernetesNodeGroup(ctx context.Context, r *request.DeleteKubernetesNodeGroupRequest) error {
 	return s.delete(ctx, r)
 }
+
+// GetKubernetesPlans retrieves a list of Kubernetes plans (EXPERIMENTAL).
+func (s *Service) GetKubernetesPlans(ctx context.Context, r *request.GetKubernetesPlansRequest) ([]upcloud.KubernetesPlan, error) {
+	plans := make([]upcloud.KubernetesPlan, 0)
+	return plans, s.get(ctx, r.RequestURL(), &plans)
+}