instance: Import logging, handle eexceptions

recircle/instance/migrations/0009_auto_20190715_0929.py

+# Generated by Django 2.2.3 on 2019-07-15 09:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('instance', '0008_auto_20190704_1310'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='instance',
+            name='flavor',
+            field=models.ForeignKey(help_text='Reasources given to the vm', on_delete='CASCADE', related_name='instances', to='instance.Flavor', verbose_name='flavor'),
+        ),
+        migrations.AlterField(
+            model_name='instance',
+            name='lease',
+            field=models.ForeignKey(on_delete='CASCADE', related_name='instances', to='instance.Lease'),
+        ),
+    ]

recircle/instance/models.py

@@ -7,7 +7,9 @@ from image.models import Disk
 from interface_openstack.implementation.vm.instance import (
         OSVirtualMachineManager
       )
+import logging
 
+logger = logging.getLogger(__name__)
 
 ACCESS_METHODS = tuple(
     [(key, val[0]) for key, val in settings.VM_ACCESS_PROTOCOLS.items()]
@@ -43,13 +45,17 @@ class Flavor(models.Model):
     def create(cls, name, description, ram=0, vcpu=0,
                initial_disk=0, priority=0):
         interface = OSVirtualMachineManager(settings.CONNECTION)
+        try:
             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
+        except Exception as e:
+            logger.error(str(e))
+            raise ValueError("Couldn't create Flavor in remote cloud.")
 
 
 class Instance(models.Model):
@@ -110,6 +116,7 @@ class Instance(models.Model):
         inst.full_clean()
         inst.save()
 
+        logger.info("New instance created")
         return inst
 
     @classmethod
@@ -117,6 +124,7 @@ class Instance(models.Model):
                                       disks, networks, flavor):
         # TODO: attach disks when the remote instance created
         interface = OSVirtualMachineManager(settings.CONNECTION)
+        try:
             remote_inst = interface.create_vm_from_template(params["name"],
                                                             template.remote_ID,
                                                             flavor.remote_id,
@@ -124,8 +132,11 @@ class Instance(models.Model):
                                                             )
             remote_id = remote_inst.id
             new_inst = cls.create(lease, owner, flavor, remote_id, params)
-
             return new_inst
+        except Exception as e:
+            logger.error(str(e))
+            raise ValueError("Couldn't create Flavor in remote cloud."
+                             "Search the logs for more detail.")
 
     def clean(self, *args, **kwargs):
         self.time_of_suspend, self.time_of_delete = self.get_renew_times()