Add Flavor create method, fix instance create

Pipfile

@@ -6,6 +6,7 @@ verify_ssl = true
 [dev-packages]
 httpie = "*"
 django-rest-swagger = "*"
+coverage = "*"
 
 [packages]
 django = "*"

recircle/instance/admin.py

 from django.contrib import admin
 
-from instance.models import Instance
+from instance.models import Instance, Flavor, Lease
 
 admin.site.register(Instance)
+admin.site.register(Flavor)
+admin.site.register(Lease)

recircle/instance/models.py

@@ -2,8 +2,9 @@ from django.db import models
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.utils import timezone
+from datetime import timedelta
 from image.models import Disk
-from implementation.vm.instance import OSVirtualMachineManager
+from interface_openstack.implementation.vm.instance import OSVirtualMachineManager
 import openstack
 
 
@@ -37,6 +38,19 @@ class Flavor(models.Model):
     initial_disk = models.IntegerField(blank=True, null=True)
     priority = models.IntegerField(blank=True, null=True)
 
+    @classmethod
+    def create(cls, name, description, ram=0, vcpu=0,
+               initial_disk=0, priority=0):
+        conn = openstack.connect(cloud="openstack")
+        interface = OSVirtualMachineManager(conn)
+        remote_flavor = interface.create_flavor(name, ram, vcpu, initial_disk)
+        flavor = cls(name=name, description=description,
+                     remote_id=remote_flavor.id, ram=ram, vcpu=vcpu,
+                     initial_disk=initial_disk, priority=priority)
+        flavor.save()
+
+        return flavor
+
 
 class Instance(models.Model):
     """Virtual machine instance.
@@ -84,8 +98,10 @@ class Instance(models.Model):
 
     owner = models.ForeignKey(User, on_delete="CASCADE", null=True)
     flavor = models.ForeignKey(Flavor, help_text="Reasources given to the vm",
-                               verbose_name="flavor", on_delete="CASCADE")
-    lease = models.ForeignKey(Lease, on_delete="CASCADE")
+                               verbose_name="flavor", on_delete="CASCADE",
+                               related_name='instances')
+    lease = models.ForeignKey(Lease, on_delete="CASCADE",
+                              related_name='instances')
 
     @classmethod
     def create(cls, lease, owner, flavor, remote_id, params):
@@ -94,6 +110,8 @@ class Instance(models.Model):
         inst.full_clean()
         inst.save()
 
+        return inst
+
     @classmethod
     def create_instance_from_template(cls, params, template, owner, lease,
                                       disks, networks, flavor):
@@ -103,7 +121,6 @@ class Instance(models.Model):
                                                         template.remote_ID,
                                                         flavor.remote_id,
                                                         networks,
-                                                        # disks
                                                         )
         remote_id = remote_inst.id
         new_inst = cls.create(lease, owner, flavor, remote_id, params)
@@ -111,7 +128,7 @@ class Instance(models.Model):
         return new_inst
 
     def clean(self, *args, **kwargs):
-        # self.time_of_suspend, self.time_of_delete = self.get_renew_times()
+        self.time_of_suspend, self.time_of_delete = self.get_renew_times()
         super(Instance, self).clean(*args, **kwargs)
 
     def get_renew_times(self, lease=None):
@@ -120,5 +137,8 @@ class Instance(models.Model):
         if lease is None:
             lease = self.lease
         return (
-            timezone.now() + lease.suspend_interval_in_sec,
-            timezone.now() + lease.delete_interval_in_sec)
+            timezone.now() + timedelta(
+                                milliseconds=lease.suspend_interval_in_sec),
+            timezone.now() + timedelta(
+                                milliseconds=lease.delete_interval_in_sec)
+            )