diff --git a/uncloud/uncloud_vm/migrations/0007_auto_20200229_1559.py b/uncloud/uncloud_vm/migrations/0007_auto_20200229_1559.py
new file mode 100644
index 0000000..6e08c0c
--- /dev/null
+++ b/uncloud/uncloud_vm/migrations/0007_auto_20200229_1559.py
@@ -0,0 +1,23 @@
+# Generated by Django 3.0.3 on 2020-02-29 15:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uncloud_vm', '0006_auto_20200229_1545'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='vmdiskimageproduct',
+            name='import_url',
+            field=models.URLField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='vmdiskimageproduct',
+            name='size_in_gb',
+            field=models.FloatField(blank=True, null=True),
+        ),
+    ]
diff --git a/uncloud/uncloud_vm/models.py b/uncloud/uncloud_vm/models.py
index b585cb9..f2cbf13 100644
--- a/uncloud/uncloud_vm/models.py
+++ b/uncloud/uncloud_vm/models.py
@@ -55,7 +55,9 @@ class VMDiskImageProduct(models.Model):
 
     """
 
-    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    uuid = models.UUIDField(primary_key=True,
+                            default=uuid.uuid4,
+                            editable=False)
     owner = models.ForeignKey(get_user_model(),
                               on_delete=models.CASCADE,
                               editable=False)
@@ -64,7 +66,10 @@ class VMDiskImageProduct(models.Model):
     is_os_image = models.BooleanField(default=False)
     is_public = models.BooleanField(default=False)
 
-    size_in_gb = models.FloatField()
+    size_in_gb = models.FloatField(null=True,
+                                   blank=True)
+    import_url = models.URLField(null=True,
+                                 blank=True)
 
 
     storage_class = models.CharField(max_length=32,
diff --git a/uncloud/uncloud_vm/serializers.py b/uncloud/uncloud_vm/serializers.py
index a64fdd0..f8618ee 100644
--- a/uncloud/uncloud_vm/serializers.py
+++ b/uncloud/uncloud_vm/serializers.py
@@ -3,6 +3,13 @@ from django.contrib.auth import get_user_model
 from rest_framework import serializers
 from .models import VMHost, VMProduct, VMSnapshotProduct, VMDiskProduct, VMDiskImageProduct
 
+GB_SSD_PER_DAY=0.012
+GB_HDD_PER_DAY=0.0006
+
+GB_SSD_PER_DAY=0.012
+GB_HDD_PER_DAY=0.0006
+
+
 class VMHostSerializer(serializers.ModelSerializer):
     class Meta:
         model = VMHost
@@ -32,11 +39,9 @@ class VMSnapshotProductSerializer(serializers.ModelSerializer):
 
     # verify that vm.owner == user.request
     def validate_vm(self, value):
-
         if not value.owner == self.context['request'].user:
             raise serializers.ValidationError("VM {} not found for owner {}.".format(value,
                                                                                      self.context['request'].user))
-
         disks = VMDiskProduct.objects.filter(vm=value)
 
         if len(disks) == 0:
diff --git a/uncloud/uncloud_vm/views.py b/uncloud/uncloud_vm/views.py
index b9d80f9..851041e 100644
--- a/uncloud/uncloud_vm/views.py
+++ b/uncloud/uncloud_vm/views.py
@@ -26,7 +26,14 @@ class VMDiskImageProductMineViewSet(viewsets.ModelViewSet):
     def get_queryset(self):
         return VMDiskImageProduct.objects.filter(owner=self.request.user)
 
-class VMDiskImageProductPublicViewSet(viewsets.ModelViewSet):
+    def create(self, request):
+        serializer = VMProductSerializer(data=request.data, context={'request': request})
+        serializer.is_valid(raise_exception=True)
+        serializer.save(owner=request.user)
+        return Response(serializer.data)
+
+
+class VMDiskImageProductPublicViewSet(viewsets.ReadOnlyModelViewSet):
     permission_classes = [permissions.IsAuthenticated]
     serializer_class = VMDiskImageProductSerializer
 
@@ -55,7 +62,6 @@ class VMProductViewSet(viewsets.ModelViewSet):
         order.save()
 
         serializer.save(owner=request.user, order=order)
-
         return Response(serializer.data)