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Access VirtualMachineTemplates via api!

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Serialization of VirtualMachineTemplates now fully works
This commit is contained in:
Modulos 2017-05-11 04:05:58 +02:00
commit cbc13de34f
5 changed files with 180 additions and 59 deletions
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84
opennebula_api/models.py
View file

@ -28,31 +28,30 @@ class VirtualMachineTemplate(models.Model):
return price
def get_name(self):
if self.manager is None:
self.manager = OpenNebulaManager()
template = self.manager._get_template(template_id=self.opennebula_id)
manager = OpenNebulaManager(create_user=False)
template = manager._get_template(template_id=self.opennebula_id)
return template.name
def get_cores(self):
if self.manager is None:
self.manager = OpenNebulaManager()
template = self.manager._get_template(template_id=self.opennebula_id).template
manager = OpenNebulaManager(create_user=False)
template = manager._get_template(template_id=self.opennebula_id).template
return int(template.vcpu)
def get_disk_size(self):
if self.manager is None:
self.manager = OpenNebulaManager()
template = self.manager._get_template(template_id=self.opennebula_id).template
return int(template.disk.size) / 1024
manager = OpenNebulaManager(create_user=False)
template = manager._get_template(template_id=self.opennebula_id).template
disk_size = 0
for disk in template.disks:
disk_size += int(disk.size)
return disk_size / 1024
def get_memory(self):
if self.manager is None:
self.manager = OpenNebulaManager()
template = self.manager._get_template(template_id=self.opennebula_id).template
manager = OpenNebulaManager(create_user=False)
template = manager._get_template(template_id=self.opennebula_id).template
return int(template.memory) / 1024
class VirtualMachine(models.Model):
@ -133,7 +132,7 @@ class VirtualMachine(models.Model):
vm = self.manager._get_vm(vm_id=self.opennebula_id)
return self.VM_STATE.get(str(vm.state))
def get_pirce(self)
def get_price(self):
return 0.0
class OpenNebulaManager():
@ -147,8 +146,7 @@ class OpenNebulaManager():
settings.OPENNEBULA_PASSWORD
)
if not create_user:
if not create_user or email is None:
return
# Get or create oppenebula user using given credentials
@ -189,6 +187,7 @@ class OpenNebulaManager():
host=settings.OPENNEBULA_DOMAIN,
protocol=settings.OPENNEBULA_PROTOCOL)
)
raise ConnectionRefusedError
def _get_user_pool(self):
try:
user_pool = oca.UserPool(self.oneadmin_client)
@ -198,11 +197,30 @@ class OpenNebulaManager():
host=settings.OPENNEBULA_DOMAIN,
protocol=settings.OPENNEBULA_PROTOCOL)
)
raise ConnectionRefusedError
return user_pool
def create_virtualmachine(self, template_id):
template_pool = oca.VmTemplatePool(self.oneadmin_client)
template_pool.info()
def _get_vm_pool(self):
try:
vm_pool = oca.VmPool(self.oneadmin_client)
vm_pool.info()
except ConnectionRefusedError:
print('Could not connect to host: {host} via protocol {protocol}'.format(
host=settings.OPENNEBULA_DOMAIN,
protocol=settings.OPENNEBULA_PROTOCOL)
)
raise ConnectionRefusedError
return vm_pool
def _get_vm(self, vm_id):
vm_pool = self._get_vm_pool()
# Get virtual machines from all users
vm_pool.info(filter=-2)
return vm_pool.get_by_id(vm_id)
def create_vm(self, template_id):
template_pool = self._get_template_pool()
template = template_pool.get_by_id(template_id)
@ -215,6 +233,28 @@ class OpenNebulaManager():
)
return vm_id
def delete_vm(self, vm_id):
vm = self._get_vm(vm_id)
vm.delete()
def _get_template_pool(self):
try:
template_pool = oca.VmTemplatePool(self.oneadmin_client)
template_pool.info()
except ConnectionRefusedError:
print('Could not connect to host: {host} via protocol {protocol}'.format(
host=settings.OPENNEBULA_DOMAIN,
protocol=settings.OPENNEBULA_PROTOCOL)
)
raise ConnectionRefusedError
return template_pool
def _get_template(self, template_id):
template_pool = self._get_template_pool()
return template_pool.get_by_id(template_id)
def create_template(self, name, cores, memory, disk_size):
"""Create and add a new template to opennebula.
:param name: A string representation describing the template.
@ -247,3 +287,9 @@ class OpenNebulaManager():
)
return template_id
def delete_template(self, template_id):
self.oneadmin_client.call(oca.VmTemplate.METHODS['delete'], template_id, False)

32
opennebula_api/serializer.py
View file

@ -1,32 +0,0 @@
from res_framework import serializers
from .models import VirtualMachine, VirtualMachineTemplate
class VirtualMachineSerializer(serializers.ModelSerializer):
"""Serializer to map the virtual machine instance into JSON format."""
cores = serializers.IntegerField(read_only=True, source='get_cores')
name = serializers.CharField(read_only=True, source='get_name')
disk_size = serializers.IntegerField(read_only=True, source='get_disk_size')
memory = serializers.IntegerField(read_only=True, source='get_memory')
#TODO: See if we can change to IPAddressField
ip = serializers.CharField(read_only=True, source='get_ip')
deploy_id = serializers.IntegerField(read_only=True, source='get_deploy_id')
id = serializers.IntegerField(read_only=True, source='get_id')
state = serializers.CharField(read_only=True, source='get_state')
price = serializers.FloatField(read_only=True, source='get_price')
class Meta:
model = VirtualMachine
class VirtualMachineTemplateSerializer(serializers.ModelSerializer):
"""Serializer to map the virtual machine template instance into JSON format."""
cores = serializers.IntegerField(read_only=True, source='get_cores')
name = serializers.CharField(read_only=True, source='get_name')
disk_size = serializers.IntegerField(read_only=True, source='get_disk_size')
memory = serializers.IntegerField(read_only=True, source='get_memory')
class Meta:
model = VirtualMachineTemplate
fields = ()

63
opennebula_api/serializers.py Normal file
View file

@ -0,0 +1,63 @@
import oca
from rest_framework import serializers
from oca import OpenNebulaException
from .models import VirtualMachine, VirtualMachineTemplate, OpenNebulaManager
class VirtualMachineSerializer(serializers.ModelSerializer):
"""Serializer to map the virtual machine instance into JSON format."""
#TODO: Maybe we can change to template.get_cores
cores = serializers.IntegerField(read_only=True, source='get_cores')
name = serializers.CharField(read_only=True, source='get_name')
disk_size = serializers.IntegerField(read_only=True, source='get_disk_size')
memory = serializers.IntegerField(read_only=True, source='get_memory')
#TODO: See if we can change to IPAddressField
ip = serializers.CharField(read_only=True, source='get_ip')
deploy_id = serializers.IntegerField(read_only=True, source='get_deploy_id')
vm_id = serializers.IntegerField(read_only=True, source='get_vm_id')
state = serializers.CharField(read_only=True, source='get_state')
price = serializers.FloatField(read_only=True, source='get_price')
class Meta:
model = VirtualMachine
fields = ('id', 'opennebula_id', 'template', 'cores', 'name',
'disk_size', 'memory', 'ip', 'deploy_id', 'state', 'vm_id',
'price')
class VirtualMachineTemplateSerializer(serializers.ModelSerializer):
"""Serializer to map the virtual machine template instance into JSON format."""
cores = serializers.IntegerField(source='get_cores')
name = serializers.CharField(source='get_name')
disk_size = serializers.IntegerField(source='get_disk_size')
memory = serializers.IntegerField(source='get_memory')
class Meta:
model = VirtualMachineTemplate
fields = ('id', 'name', 'cores', 'memory', 'disk_size', 'base_price',
'core_price', 'memory_price', 'disk_size_price', 'opennebula_id')
read_only_fields = ('opennebula_id', )
def validate(self, data):
# Create the opennebula model
cores = data.pop('get_cores')
name = data.pop('get_name')
disk_size = data.pop('get_disk_size')
memory = data.pop('get_memory')
manager = OpenNebulaManager(create_user = False)
try:
opennebula_id = manager.create_template(name=name, cores=cores,
memory=memory,
disk_size=disk_size)
data.update({'opennebula_id':opennebula_id})
except OpenNebulaException as err:
raise serializers.ValidationError("OpenNebulaException occured. {0}".format(err))
return data
def create(self, validated_data):
return VirtualMachineTemplate.objects.create(**validated_data)

39
opennebula_api/tests.py
View file

@ -19,10 +19,10 @@ class OpenNebulaManagerTestCases(TestCase):
def test_model_can_connect_to_server(self):
"""Test the opennebula manager model can connect to a server."""
try:
version = self.manager.version()
user_pool = self.manager._get_user_pool()
except:
version = None
self.assertFalse(version is None)
user_pool = None
self.assertFalse(user_pool is None)
def test_model_can_create_user(self):
"""Test the opennebula manager model can create a new user."""
@ -30,7 +30,12 @@ class OpenNebulaManagerTestCases(TestCase):
self.manager = OpenNebulaManager(email=self.email,
password=self.password,
create_user=True)
new_count = len(self.manager._get_user_pool())
user_pool = self.manager._get_user_pool()
new_count = len(user_pool)
# Remove the user afterwards
user = user_pool.get_by_name(self.email)
user.delete()
self.assertNotEqual(old_count, new_count)
@ -67,6 +72,9 @@ class VirtualMachineTemplateTestCase(TestCase):
old_count = VirtualMachineTemplate.objects.count()
self.template.save()
new_count = VirtualMachineTemplate.objects.count()
# Remove the template afterwards
template = self.manager._get_template(self.template.opennebula_id)
template.delete()
self.assertNotEqual(old_count, new_count)
def test_model_can_calculate_price(self):
@ -80,8 +88,26 @@ class VirtualMachineTemplateTestCase(TestCase):
class VirtualMachineTestCase(TestCase):
def setUp(self):
"""Define the test client and other test variables."""
self.template_name = "Standard"
self.base_price = 0.0
self.core_price = 5.0
self.memory_price = 2.0
self.disk_size_price = 0.6
self.cores = 1
self.memory = 1
self.disk_size = 10.0
self.manager = OpenNebulaManager(email=None, password=None, create_user=False)
self.template = VirtualMachineTemplate.objects.first()
self.opennebula_id = self.manager.create_template(name=self.template_name,
cores=self.cores,
memory=self.memory,
disk_size=self.disk_size)
self.template = VirtualMachineTemplate(opennebula_id=self.opennebula_id,
base_price=self.base_price,
memory_price=self.memory_price,
core_price=self.core_price,
disk_size_price=self.disk_size_price)
self.template_id = self.template.opennebula_id()
self.opennebula_id = self.manager.create_virtualmachine(template_id=self.template_id)
@ -95,6 +121,9 @@ class VirtualMachineTestCase(TestCase):
new_count = VirtualMachine.objects.count()
self.assertNotEqual(old_count, new_count)
def test_model_can_create_a_virtualmachine_for_user(self):
pass
def test_model_can_delete_a_virtualmachine(self):
"""Test the virtualmachine model can delete a virtualmachine."""
self.virtualmachine.save()

19
opennebula_api/views.py
View file

@ -1,3 +1,18 @@
from django.shortcuts import render
from rest_framework import generics
from .serializers import VirtualMachineTemplateSerializer
from .models import VirtualMachineTemplate, OpenNebulaManager
# Create your views here.
class TemplateCreateView(generics.ListCreateAPIView):
"""This class defines the create behavior of our rest api."""
queryset = VirtualMachineTemplate.objects.all()
serializer_class = VirtualMachineTemplateSerializer
def perform_create(self, serializer):
"""Save the post data when creating a new template."""
serializer.save()
class TemplateDetailsView(generics.RetrieveUpdateDestroyAPIView):
"""This class handles the http GET, PUT and DELETE requests."""
queryset = VirtualMachineTemplate.objects.all()
serializer_class = VirtualMachineTemplateSerializer