feat(kubernetes): cluster setup reasonable defaults EE-4518 (#8082)

api/kubernetes/cli/storage.go

@@ -0,0 +1,37 @@
+package cli
+
+import (
+	"context"
+
+	portainer "github.com/portainer/portainer/api"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func (kcl *KubeClient) GetStorage() ([]portainer.KubernetesStorageClassConfig, error) {
+	var storages []portainer.KubernetesStorageClassConfig
+
+	storageClient := kcl.cli.StorageV1().StorageClasses()
+	storageList, err := storageClient.List(context.Background(), metav1.ListOptions{})
+	if err != nil {
+		return storages, err
+	}
+
+	for _, s := range storageList.Items {
+		var storage portainer.KubernetesStorageClassConfig
+
+		v, ok := s.Annotations["storageclass.kubernetes.io/is-default-class"]
+		if !ok || v != "true" {
+			continue
+		}
+		storage.Name = s.Name
+		storage.Provisioner = s.Provisioner
+		storage.AccessModes = []string{"RWO"}
+		if s.AllowVolumeExpansion != nil {
+			storage.AllowVolumeExpansion = *s.AllowVolumeExpansion
+		}
+
+		storages = append(storages, storage)
+	}
+
+	return storages, nil
+}