phase in vmhost

Signed-off-by: Nico Schottelius <nico@nico-notebook.schottelius.org>

uncloud/uncloud_vm/models.py

@@ -1,20 +1,22 @@
 from django.db import models
+from django.contrib.auth import get_user_model
+import uuid
 
 
 class VMHost(models.Model):
     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
 
     # 253 is the maximum DNS name length
-    hostname = models.CharField(max_length=253)
+    hostname = models.CharField(max_length=253, unique=True)
 
     # indirectly gives a maximum number of cores / VM - f.i. 32
-    physical_cores = models.IntegerField()
+    physical_cores = models.IntegerField(default=0)
 
     # determines the maximum usable cores - f.i. 320 if you overbook by a factor of 10
-    usable_cores = models.IntegerField()
+    usable_cores = models.IntegerField(default=0)
 
     # ram that can be used of the server
-    usable_ram_in_gb = models.FloatField()
+    usable_ram_in_gb = models.FloatField(default=0)
 
 
     status = models.CharField(max_length=32,
@@ -22,24 +24,33 @@ class VMHost(models.Model):
                                   ('pending', 'Pending'),
                                   ('active', 'Active'),
                                   ('unusable', 'Unusable'),
+                                  ('deleted', 'Deleted'),
                               ),
                               default='pending'
     )
 
 
-class VM(models.Model):
-    uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-    owner = models.ForeignKey(get_user_model(), on_delete=models.CASCADE)
+class VMProduct(models.Model):
+    uuid = models.UUIDField(primary_key=True,
+                            default=uuid.uuid4,
+                            editable=False)
+    owner = models.ForeignKey(get_user_model(),
+                              on_delete=models.CASCADE,
+                              editable=False)
+    vmhost   = models.ForeignKey(VMHost,
+                                 on_delete=models.CASCADE,
+                                 editable=False)
 
     cores = models.IntegerField()
     ram_in_gb = models.FloatField()
 
-    vmhost   = models.ForeignKey(VMHost, on_delete=models.CASCADE)
 
+class VMWithOSProduct(VMProduct):
+    pass
 
-class VMDisk(models.Model):
+class VMDiskProduct(models.Model):
     uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-    vm   = models.ForeignKey(VM, on_delete=models.CASCADE)
+    vm   = models.ForeignKey(VMProduct, on_delete=models.CASCADE)
     size_in_gb = models.FloatField()
 
     storage_class = models.CharField(max_length=32,
@@ -49,3 +60,12 @@ class VMDisk(models.Model):
                               ),
                               default='ssd'
     )
+
+class OperatingSystemDisk(VMDiskProduct):
+    """ Defines an Operating System Disk that can be cloned for a VM """
+    os_name = models.CharField(max_length=128)
+
+
+class VMNetworkCard(models.Model):
+    vm   = models.ForeignKey(VMProduct, on_delete=models.CASCADE)
+    mac_address = models.IntegerField()