only allow gsk release < 1.30 to use gs tf provider v1 (#409)

gridscale/resource_gridscale_k8s.go

@@ -801,10 +801,18 @@ func resourceGridscaleK8sCreate(d *schema.ResourceData, meta interface{}) error
 	client := meta.(*gsclient.Client)
 	errorPrefix := fmt.Sprintf("create k8s (%s) resource -", d.Id())
 	template, err := deriveK8sTemplateFromResourceData(client, d)
-
 	if err != nil {
 		return err
 	}
+	// check if the k8s release is supported by gs tf provider v1
+	templateRelease, err := NewRelease(template.Properties.Release)
+	if err != nil {
+		return fmt.Errorf("%s error: %v", errorPrefix, err)
+	}
+	err = templateRelease.CheckIfK8SReleaseIsSupported()
+	if err != nil {
+		return fmt.Errorf("%s error: %v", errorPrefix, err)
+	}
 	requestBody := gsclient.PaaSServiceCreateRequest{
 		Name:                    d.Get("name").(string),
 		PaaSServiceTemplateUUID: template.Properties.ObjectUUID,
@@ -1075,8 +1083,17 @@ func resourceGridscaleK8sDelete(d *schema.ResourceData, meta interface{}) error
 }
 
 func validateK8sParameters(d *schema.ResourceDiff, template gsclient.PaaSTemplate) error {
-	var errorMessages []string
+	// check if the k8s release is supported by gs tf provider v1
+	templateRelease, err := NewRelease(template.Properties.Release)
+	if err != nil {
+		return err
+	}
+	err = templateRelease.CheckIfK8SReleaseIsSupported()
+	if err != nil {
+		return err
+	}
 
+	var errorMessages []string
 	worker_memory_scheme, mem_ok := template.Properties.ParametersSchema["k8s_worker_node_ram"]
 	// TODO: The API scheme will be CHANGED in the future. There will be multiple node pools.
 	if memory, ok := d.GetOk("node_pool.0.memory"); ok && mem_ok {

gridscale/resource_gridscale_release.go

@@ -17,6 +17,8 @@ type Feature struct {
 	Release
 }
 
+const unsupportedK8SRelease = "1.30"
+
 // NewRelease creates a new Release instance.
 func NewRelease(representation string) (*Release, error) {
 	version, err := goVersion.NewVersion(representation)
@@ -28,11 +30,21 @@ func NewRelease(representation string) (*Release, error) {
 }
 
 // CheckIfFeatureIsKnown checks by a Release receiver if a passed Feature instance is known.
-func (r *Release) CheckIfFeatureIsKnown(f *Feature) *ReleaseFeatureIncompatibilityError {
+func (r *Release) CheckIfFeatureIsKnown(f *Feature) error {
 	if r.LessThan(&f.Version) {
 		return &ReleaseFeatureIncompatibilityError{
 			Detail: fmt.Sprintf("Feature '%s' is part of release %s but requested for release %s.", f.Description, f.String(), r.String()),
 		}
 	}
 	return nil
 }
+
+// CheckIfK8SReleaseIsSupported checks if the Kubernetes release is supported by this gridscale terraform provider.
+func (r *Release) CheckIfK8SReleaseIsSupported() error {
+	if r.GreaterThanOrEqual(goVersion.Must(goVersion.NewVersion(unsupportedK8SRelease))) {
+		return &ReleaseFeatureIncompatibilityError{
+			Detail: fmt.Sprintf("this gridscale terraform provider version v1 supports only Kubernetes release < %s, for Kubernetes release %s please use gridscale terraform provider version v2", unsupportedK8SRelease, r.String()),
+		}
+	}
+	return nil
+}