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Commit 80fbc840 by Őry Máté
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vm: split models

parent 0a40f809
Showing with 439 additions and 351 deletions
circle/vm/models/__init__.py 0 → 100644
# flake8: noqa
from .activity import InstanceActivity
from .instance import InstanceActiveManager
from .instance import BaseResourceConfigModel
from .instance import NamedBaseResourceConfig
from .instance import VirtualMachineDescModel
from .instance import InstanceTemplate
from .instance import Instance
from .instance import post_state_changed
from .instance import pre_state_changed
from .network import InterfaceTemplate
from .network import Interface
from .node import Trait
from .node import Node
from .node import NodeActivity
from .node import Lease
__all__ = [
'InstanceActivity', 'InstanceActiveManager', 'BaseResourceConfigModel',
'NamedBaseResourceConfig', 'VirtualMachineDescModel', 'InstanceTemplate',
'Instance', 'post_state_changed', 'pre_state_changed', 'InterfaceTemplate',
'Interface', 'Trait', 'Node', 'NodeActivity', 'Lease', ]
circle/vm/models/activity.py 0 → 100644
from __future__ import unicode_literals
from contextlib import contextmanager
from logging import getLogger
from django.db.models import ForeignKey
from django.utils import timezone
from django.utils.translation import ugettext_lazy as _
from common.models import ActivityModel, activitycontextimpl
logger = getLogger(__name__)
class InstanceActivity(ActivityModel):
instance = ForeignKey('Instance', related_name='activity_log',
help_text=_('Instance this activity works on.'),
verbose_name=_('instance'))
class Meta:
ordering = ['-started', 'instance', '-id']
app_label = 'vm'
db_table = 'vm_instanceactivity'
def __unicode__(self):
if self.parent:
return '{}({})->{}'.format(self.parent.activity_code,
self.instance,
self.activity_code)
else:
return '{}({})'.format(self.activity_code,
self.instance)
def get_readable_name(self):
return self.activity_code.split('.')[-1].replace('_', ' ').capitalize()
@classmethod
def create(cls, code_suffix, instance, task_uuid=None, user=None):
act = cls(activity_code='vm.Instance.' + code_suffix,
instance=instance, parent=None, started=timezone.now(),
task_uuid=task_uuid, user=user)
act.save()
return act
def create_sub(self, code_suffix, task_uuid=None):
act = InstanceActivity(
activity_code=self.activity_code + '.' + code_suffix,
instance=self.instance, parent=self, started=timezone.now(),
task_uuid=task_uuid, user=self.user)
act.save()
return act
@contextmanager
def sub_activity(self, code_suffix, task_uuid=None):
act = self.create_sub(code_suffix, task_uuid)
return activitycontextimpl(act)
@contextmanager
def instance_activity(code_suffix, instance, task_uuid=None, user=None):
act = InstanceActivity.create(code_suffix, instance, task_uuid, user)
return activitycontextimpl(act)
circle/vm/models.py → circle/vm/models/instance.py
from __future__ import unicode_literals
from contextlib import contextmanager
from datetime import timedelta
from importlib import import_module
from logging import getLogger
from netaddr import EUI, mac_unix
from importlib import import_module
import django.conf
from django.contrib.auth.models import User
from django.core import signing
from django.db.models import (Model, FloatField, ForeignKey, ManyToManyField,
from django.db.models import (Model, ForeignKey, ManyToManyField,
IntegerField, DateTimeField, BooleanField,
TextField, CharField, permalink, Manager)
from django.contrib.auth.models import User
from django.core import signing
from django.dispatch import Signal
from django.utils import timezone
from django.utils.translation import ugettext_lazy as _
from celery.exceptions import TimeoutError
from model_utils.models import TimeStampedModel
from taggit.managers import TaggableManager
from acl.models import AclBase
from common.models import ActivityModel, activitycontextimpl, method_cache
from firewall.models import Vlan, Host
from storage.models import Disk
from .tasks import local_tasks, vm_tasks, net_tasks
from ..tasks import local_tasks, vm_tasks
from .node import Node, Trait
from .network import Interface
from .activity import instance_activity
logger = getLogger(__name__)
pre_state_changed = Signal(providing_args=["new_state"])
post_state_changed = Signal(providing_args=["new_state"])
pwgen = User.objects.make_random_password
scheduler = import_module(name=django.conf.settings.VM_SCHEDULER)
ARCHITECTURES = (('x86_64', 'x86-64 (64 bit)'),
('i686', 'x86 (32 bit)'))
ACCESS_PROTOCOLS = django.conf.settings.VM_ACCESS_PROTOCOLS
ACCESS_METHODS = [(key, name) for key, (name, port, transport)
in ACCESS_PROTOCOLS.iteritems()]
ARCHITECTURES = (('x86_64', 'x86-64 (64 bit)'),
('i686', 'x86 (32 bit)'))
VNC_PORT_RANGE = (2000, 65536) # inclusive start, exclusive end
pre_state_changed = Signal(providing_args=["new_state"])
post_state_changed = Signal(providing_args=["new_state"])
class InstanceActiveManager(Manager):
def get_query_set(self):
......@@ -78,13 +76,6 @@ class NamedBaseResourceConfig(BaseResourceConfigModel, TimeStampedModel):
return self.name
class Trait(Model):
name = CharField(max_length=50, verbose_name=_('name'))
def __unicode__(self):
return self.name
class VirtualMachineDescModel(BaseResourceConfigModel):
"""Abstract base for virtual machine describing models.
......@@ -108,178 +99,6 @@ class VirtualMachineDescModel(BaseResourceConfigModel):
abstract = True
class Node(TimeStampedModel):
"""A VM host machine, a hypervisor.
"""
name = CharField(max_length=50, unique=True,
verbose_name=_('name'),
help_text=_('Human readable name of node.'))
priority = IntegerField(verbose_name=_('priority'),
help_text=_('Node usage priority.'))
host = ForeignKey(Host, verbose_name=_('host'),
help_text=_('Host in firewall.'))
enabled = BooleanField(verbose_name=_('enabled'), default=False,
help_text=_('Indicates whether the node can '
'be used for hosting.'))
traits = ManyToManyField(Trait, blank=True,
help_text=_("Declared traits."),
verbose_name=_('traits'))
tags = TaggableManager(blank=True, verbose_name=_("tags"))
overcommit = FloatField(default=1.0, verbose_name=_("overcommit ratio"),
help_text=_("The ratio of total memory with "
"to without overcommit."))
class Meta:
permissions = ()
@property
@method_cache(10, 5)
def online(self):
return self.remote_query(vm_tasks.get_core_num, timeout=1,
default=False)
@property
@method_cache(300)
def num_cores(self):
"""Number of CPU threads available to the virtual machines."""
return self.remote_query(vm_tasks.get_core_num)
@property
@method_cache(300)
def ram_size(self):
"""Bytes of total memory in the node."""
return self.remote_query(vm_tasks.get_ram_size)
@property
def ram_size_with_overcommit(self):
"""Bytes of total memory including overcommit margin.
"""
return self.ram_size * self.overcommit
def get_remote_queue_name(self, queue_id):
return self.host.hostname + "." + queue_id
def remote_query(self, task, timeout=30, raise_=False, default=None):
"""Query the given task, and get the result.
If the result is not ready in timeout secs, return default value or
raise a TimeoutError."""
r = task.apply_async(
queue=self.get_remote_queue_name('vm'), expires=timeout + 60)
try:
return r.get(timeout=timeout)
except TimeoutError:
if raise_:
raise
else:
return default
def update_vm_states(self):
domains = {}
for i in self.remote_query(vm_tasks.list_domains_info, timeout=5):
# [{'name': 'cloud-1234', 'state': 'RUNNING', ...}, ...]
try:
id = int(i['name'].split('-')[1])
except:
pass # name format doesn't match
else:
domains[id] = i['state']
instances = self.instance_set.order_by('id').values('id', 'state')
for i in instances:
try:
d = domains[i['id']]
except KeyError:
logger.info('Node %s update: instance %s missing from '
'libvirt', self, i['id'])
else:
if d != i['state']:
logger.info('Node %s update: instance %s state changed '
'(libvirt: %s, db: %s)',
self, i['id'], d, i['state'])
Instance.objects.get(id=i['id']).state_changed(d)
del domains[i['id']]
for i in domains.keys():
logger.info('Node %s update: domain %s in libvirt but not in db.',
self, i)
def __unicode__(self):
return self.name
class NodeActivity(ActivityModel):
node = ForeignKey(Node, related_name='activity_log',
help_text=_('Node this activity works on.'),
verbose_name=_('node'))
@classmethod
def create(cls, code_suffix, node, task_uuid=None, user=None):
act = cls(activity_code='vm.Node.' + code_suffix,
node=node, parent=None, started=timezone.now(),
task_uuid=task_uuid, user=user)
act.save()
return act
def create_sub(self, code_suffix, task_uuid=None):
act = NodeActivity(
activity_code=self.activity_code + '.' + code_suffix,
node=self.node, parent=self, started=timezone.now(),
task_uuid=task_uuid, user=self.user)
act.save()
return act
@contextmanager
def sub_activity(self, code_suffix, task_uuid=None):
act = self.create_sub(code_suffix, task_uuid)
return activitycontextimpl(act)
@contextmanager
def node_activity(code_suffix, node, task_uuid=None, user=None):
act = InstanceActivity.create(code_suffix, node, task_uuid, user)
return activitycontextimpl(act)
class Lease(Model):
"""Lease times for VM instances.
Specifies a time duration until suspension and deletion of a VM
instance.
"""
name = CharField(max_length=100, unique=True,
verbose_name=_('name'))
suspend_interval_seconds = IntegerField(verbose_name=_('suspend interval'))
delete_interval_seconds = IntegerField(verbose_name=_('delete interval'))
class Meta:
ordering = ['name', ]
@property
def suspend_interval(self):
return timedelta(seconds=self.suspend_interval_seconds)
@suspend_interval.setter
def suspend_interval(self, value):
self.suspend_interval_seconds = value.seconds
@property
def delete_interval(self):
return timedelta(seconds=self.delete_interval_seconds)
@delete_interval.setter
def delete_interval(self, value):
self.delete_interval_seconds = value.seconds
def __unicode__(self):
return self.name
class InstanceTemplate(VirtualMachineDescModel, TimeStampedModel):
"""Virtual machine template.
......@@ -315,11 +134,13 @@ class InstanceTemplate(VirtualMachineDescModel, TimeStampedModel):
disks = ManyToManyField(Disk, verbose_name=_('disks'),
related_name='template_set',
help_text=_('Disks which are to be mounted.'))
lease = ForeignKey(Lease, related_name='template_set',
lease = ForeignKey('Lease', related_name='template_set',
verbose_name=_('lease'),
help_text=_('Expiration times.'))
class Meta:
app_label = 'vm'
db_table = 'vm_instancetemplate'
ordering = ['name', ]
permissions = ()
verbose_name = _('template')
......@@ -343,28 +164,6 @@ class InstanceTemplate(VirtualMachineDescModel, TimeStampedModel):
return 'linux'
class InterfaceTemplate(Model):
"""Network interface template for an instance template.
If the interface is managed, a host will be created for it.
"""
vlan = ForeignKey(Vlan, verbose_name=_('vlan'),
help_text=_('Network the interface belongs to.'))
managed = BooleanField(verbose_name=_('managed'), default=True,
help_text=_('If a firewall host (i.e. IP address '
'association) should be generated.'))
template = ForeignKey(InstanceTemplate, verbose_name=_('template'),
related_name='interface_set',
help_text=_('Template the interface '
'template belongs to.'))
class Meta:
permissions = ()
verbose_name = _('interface template')
verbose_name_plural = _('interface templates')
class Instance(AclBase, VirtualMachineDescModel, TimeStampedModel):
"""Virtual machine instance.
......@@ -425,7 +224,7 @@ class Instance(AclBase, VirtualMachineDescModel, TimeStampedModel):
disks = ManyToManyField(Disk, related_name='instance_set',
help_text=_("Set of mounted disks."),
verbose_name=_('disks'))
lease = ForeignKey(Lease, help_text=_("Preferred expiration periods."))
lease = ForeignKey('Lease', help_text=_("Preferred expiration periods."))
vnc_port = IntegerField(blank=True, default=None, null=True,
help_text=_("TCP port where VNC console listens."),
unique=True, verbose_name=_('vnc_port'))
......@@ -437,6 +236,8 @@ class Instance(AclBase, VirtualMachineDescModel, TimeStampedModel):
active = InstanceActiveManager()
class Meta:
app_label = 'vm'
db_table = 'vm_instance'
ordering = ['pk', ]
verbose_name = _('instance')
verbose_name_plural = _('instances')
......@@ -911,136 +712,3 @@ class Instance(AclBase, VirtualMachineDescModel, TimeStampedModel):
self.state = new_state
self.save()
post_state_changed.send(sender=self, new_state=new_state)
class InstanceActivity(ActivityModel):
instance = ForeignKey(Instance, related_name='activity_log',
help_text=_('Instance this activity works on.'),
verbose_name=_('instance'))
class Meta:
ordering = ['-started', 'instance', '-id']
def __unicode__(self):
if self.parent:
return '{}({})->{}'.format(self.parent.activity_code,
self.instance,
self.activity_code)
else:
return '{}({})'.format(self.activity_code,
self.instance)
def get_readable_name(self):
return self.activity_code.split('.')[-1].replace('_', ' ').capitalize()
@classmethod
def create(cls, code_suffix, instance, task_uuid=None, user=None):
act = cls(activity_code='vm.Instance.' + code_suffix,
instance=instance, parent=None, started=timezone.now(),
task_uuid=task_uuid, user=user)
act.save()
return act
def create_sub(self, code_suffix, task_uuid=None):
act = InstanceActivity(
activity_code=self.activity_code + '.' + code_suffix,
instance=self.instance, parent=self, started=timezone.now(),
task_uuid=task_uuid, user=self.user)
act.save()
return act
@contextmanager
def sub_activity(self, code_suffix, task_uuid=None):
act = self.create_sub(code_suffix, task_uuid)
return activitycontextimpl(act)
@contextmanager
def instance_activity(code_suffix, instance, task_uuid=None, user=None):
act = InstanceActivity.create(code_suffix, instance, task_uuid, user)
return activitycontextimpl(act)
class Interface(Model):
"""Network interface for an instance.
"""
vlan = ForeignKey(Vlan, verbose_name=_('vlan'),
related_name="vm_interface")
host = ForeignKey(Host, verbose_name=_('host'), blank=True, null=True)
instance = ForeignKey(Instance, verbose_name=_('instance'),
related_name='interface_set')
def __unicode__(self):
return 'cloud-' + str(self.instance.id) + '-' + str(self.vlan.vid)
@property
def mac(self):
try:
return self.host.mac
except:
return Interface.generate_mac(self.instance, self.vlan)
@classmethod
def generate_mac(cls, instance, vlan):
"""Generate MAC address for a VM instance on a VLAN.
"""
# MAC 02:XX:XX:XX:XX:XX
# \________/\__/
# VM ID VLAN ID
i = instance.id & 0xfffffff
v = vlan.vid & 0xfff
m = (0x02 << 40) | (i << 12) | v
return EUI(m, dialect=mac_unix)
def get_vmnetwork_desc(self):
return {
'name': self.__unicode__(),
'bridge': 'cloud',
'mac': str(self.mac),
'ipv4': str(self.host.ipv4) if self.host is not None else None,
'ipv6': str(self.host.ipv6) if self.host is not None else None,
'vlan': self.vlan.vid,
'managed': self.host is not None
}
def deploy(self, user=None, task_uuid=None):
net_tasks.create.apply_async(
args=[self.get_vmnetwork_desc()],
queue=self.instance.get_remote_queue_name('net'))
def destroy(self, user=None, task_uuid=None):
net_tasks.destroy.apply_async(
args=[self.get_vmnetwork_desc()],
queue=self.instance.get_remote_queue_name('net'))
@classmethod
def create(cls, instance, vlan, managed, owner=None):
"""Create a new interface for a VM instance to the specified VLAN.
"""
if managed:
host = Host()
host.vlan = vlan
# TODO change Host's mac field's type to EUI in firewall
host.mac = str(cls.generate_mac(instance, vlan))
host.hostname = instance.vm_name
# Get adresses from firewall
addresses = vlan.get_new_address()
host.ipv4 = addresses['ipv4']
host.ipv6 = addresses['ipv6']
host.owner = owner
host.save()
else:
host = None
iface = cls(vlan=vlan, host=host, instance=instance)
iface.save()
return iface
def save_as_template(self, instance_template):
"""Create a template based on this interface.
"""
i = InterfaceTemplate(vlan=self.vlan, managed=self.host is not None,
template=instance_template)
i.save()
return i
circle/vm/models/network.py 0 → 100644
from __future__ import unicode_literals
from logging import getLogger
from netaddr import EUI, mac_unix
from django.db.models import Model, ForeignKey, BooleanField
from django.utils.translation import ugettext_lazy as _
from firewall.models import Vlan, Host
from ..tasks import net_tasks
logger = getLogger(__name__)
class InterfaceTemplate(Model):
"""Network interface template for an instance template.
If the interface is managed, a host will be created for it.
"""
vlan = ForeignKey(Vlan, verbose_name=_('vlan'),
help_text=_('Network the interface belongs to.'))
managed = BooleanField(verbose_name=_('managed'), default=True,
help_text=_('If a firewall host (i.e. IP address '
'association) should be generated.'))
template = ForeignKey('InstanceTemplate', verbose_name=_('template'),
related_name='interface_set',
help_text=_('Template the interface '
'template belongs to.'))
class Meta:
app_label = 'vm'
db_table = 'vm_interfacetemplate'
permissions = ()
verbose_name = _('interface template')
verbose_name_plural = _('interface templates')
class Interface(Model):
"""Network interface for an instance.
"""
vlan = ForeignKey(Vlan, verbose_name=_('vlan'),
related_name="vm_interface")
host = ForeignKey(Host, verbose_name=_('host'), blank=True, null=True)
instance = ForeignKey('Instance', verbose_name=_('instance'),
related_name='interface_set')
class Meta:
app_label = 'vm'
db_table = 'vm_interface'
def __unicode__(self):
return 'cloud-' + str(self.instance.id) + '-' + str(self.vlan.vid)
@property
def mac(self):
try:
return self.host.mac
except:
return Interface.generate_mac(self.instance, self.vlan)
@classmethod
def generate_mac(cls, instance, vlan):
"""Generate MAC address for a VM instance on a VLAN.
"""
# MAC 02:XX:XX:XX:XX:XX
# \________/\__/
# VM ID VLAN ID
i = instance.id & 0xfffffff
v = vlan.vid & 0xfff
m = (0x02 << 40) | (i << 12) | v
return EUI(m, dialect=mac_unix)
def get_vmnetwork_desc(self):
return {
'name': self.__unicode__(),
'bridge': 'cloud',
'mac': str(self.mac),
'ipv4': str(self.host.ipv4) if self.host is not None else None,
'ipv6': str(self.host.ipv6) if self.host is not None else None,
'vlan': self.vlan.vid,
'managed': self.host is not None
}
def deploy(self, user=None, task_uuid=None):
net_tasks.create.apply_async(
args=[self.get_vmnetwork_desc()],
queue=self.instance.get_remote_queue_name('net'))
def destroy(self, user=None, task_uuid=None):
net_tasks.destroy.apply_async(
args=[self.get_vmnetwork_desc()],
queue=self.instance.get_remote_queue_name('net'))
@classmethod
def create(cls, instance, vlan, managed, owner=None):
"""Create a new interface for a VM instance to the specified VLAN.
"""
if managed:
host = Host()
host.vlan = vlan
# TODO change Host's mac field's type to EUI in firewall
host.mac = str(cls.generate_mac(instance, vlan))
host.hostname = instance.vm_name
# Get adresses from firewall
addresses = vlan.get_new_address()
host.ipv4 = addresses['ipv4']
host.ipv6 = addresses['ipv6']
host.owner = owner
host.save()
else:
host = None
iface = cls(vlan=vlan, host=host, instance=instance)
iface.save()
return iface
def save_as_template(self, instance_template):
"""Create a template based on this interface.
"""
i = InterfaceTemplate(vlan=self.vlan, managed=self.host is not None,
template=instance_template)
i.save()
return i
circle/vm/models/node.py 0 → 100644
from __future__ import unicode_literals
from contextlib import contextmanager
from datetime import timedelta
from logging import getLogger
from django.db.models import (
Model, CharField, IntegerField, ForeignKey, BooleanField, ManyToManyField,
FloatField,
)
from django.utils import timezone
from django.utils.translation import ugettext_lazy as _
from celery.exceptions import TimeoutError
from model_utils.models import TimeStampedModel
from taggit.managers import TaggableManager
from common.models import ActivityModel, activitycontextimpl, method_cache
from firewall.models import Host
from ..tasks import vm_tasks
from .activity import InstanceActivity
logger = getLogger(__name__)
class Trait(Model):
name = CharField(max_length=50, verbose_name=_('name'))
class Meta:
app_label = 'vm'
db_table = 'vm_trait'
def __unicode__(self):
return self.name
class Node(TimeStampedModel):
"""A VM host machine, a hypervisor.
"""
name = CharField(max_length=50, unique=True,
verbose_name=_('name'),
help_text=_('Human readable name of node.'))
priority = IntegerField(verbose_name=_('priority'),
help_text=_('Node usage priority.'))
host = ForeignKey(Host, verbose_name=_('host'),
help_text=_('Host in firewall.'))
enabled = BooleanField(verbose_name=_('enabled'), default=False,
help_text=_('Indicates whether the node can '
'be used for hosting.'))
traits = ManyToManyField(Trait, blank=True,
help_text=_("Declared traits."),
verbose_name=_('traits'))
tags = TaggableManager(blank=True, verbose_name=_("tags"))
overcommit = FloatField(default=1.0, verbose_name=_("overcommit ratio"),
help_text=_("The ratio of total memory with "
"to without overcommit."))
class Meta:
app_label = 'vm'
db_table = 'vm_node'
permissions = ()
@property
@method_cache(10, 5)
def online(self):
return self.remote_query(vm_tasks.get_core_num, timeout=1,
default=False)
@property
@method_cache(300)
def num_cores(self):
"""Number of CPU threads available to the virtual machines."""
return self.remote_query(vm_tasks.get_core_num)
@property
@method_cache(300)
def ram_size(self):
"""Bytes of total memory in the node."""
return self.remote_query(vm_tasks.get_ram_size)
@property
def ram_size_with_overcommit(self):
"""Bytes of total memory including overcommit margin.
"""
return self.ram_size * self.overcommit
def get_remote_queue_name(self, queue_id):
return self.host.hostname + "." + queue_id
def remote_query(self, task, timeout=30, raise_=False, default=None):
"""Query the given task, and get the result.
If the result is not ready in timeout secs, return default value or
raise a TimeoutError."""
r = task.apply_async(
queue=self.get_remote_queue_name('vm'), expires=timeout + 60)
try:
return r.get(timeout=timeout)
except TimeoutError:
if raise_:
raise
else:
return default
def update_vm_states(self):
domains = {}
for i in self.remote_query(vm_tasks.list_domains_info, timeout=5):
# [{'name': 'cloud-1234', 'state': 'RUNNING', ...}, ...]
try:
id = int(i['name'].split('-')[1])
except:
pass # name format doesn't match
else:
domains[id] = i['state']
instances = self.instance_set.order_by('id').values('id', 'state')
for i in instances:
try:
d = domains[i['id']]
except KeyError:
logger.info('Node %s update: instance %s missing from '
'libvirt', self, i['id'])
else:
if d != i['state']:
logger.info('Node %s update: instance %s state changed '
'(libvirt: %s, db: %s)',
self, i['id'], d, i['state'])
self.instance_set.get(id=i['id']).state_changed(d)
del domains[i['id']]
for i in domains.keys():
logger.info('Node %s update: domain %s in libvirt but not in db.',
self, i)
def __unicode__(self):
return self.name
class NodeActivity(ActivityModel):
node = ForeignKey(Node, related_name='activity_log',
help_text=_('Node this activity works on.'),
verbose_name=_('node'))
class Meta:
app_label = 'vm'
db_table = 'vm_nodeactivity'
@classmethod
def create(cls, code_suffix, node, task_uuid=None, user=None):
act = cls(activity_code='vm.Node.' + code_suffix,
node=node, parent=None, started=timezone.now(),
task_uuid=task_uuid, user=user)
act.save()
return act
def create_sub(self, code_suffix, task_uuid=None):
act = NodeActivity(
activity_code=self.activity_code + '.' + code_suffix,
node=self.node, parent=self, started=timezone.now(),
task_uuid=task_uuid, user=self.user)
act.save()
return act
@contextmanager
def sub_activity(self, code_suffix, task_uuid=None):
act = self.create_sub(code_suffix, task_uuid)
return activitycontextimpl(act)
@contextmanager
def node_activity(code_suffix, node, task_uuid=None, user=None):
act = InstanceActivity.create(code_suffix, node, task_uuid, user)
return activitycontextimpl(act)
class Lease(Model):
"""Lease times for VM instances.
Specifies a time duration until suspension and deletion of a VM
instance.
"""
name = CharField(max_length=100, unique=True,
verbose_name=_('name'))
suspend_interval_seconds = IntegerField(verbose_name=_('suspend interval'))
delete_interval_seconds = IntegerField(verbose_name=_('delete interval'))
class Meta:
app_label = 'vm'
db_table = 'vm_lease'
ordering = ['name', ]
@property
def suspend_interval(self):
return timedelta(seconds=self.suspend_interval_seconds)
@suspend_interval.setter
def suspend_interval(self, value):
self.suspend_interval_seconds = value.seconds
@property
def delete_interval(self):
return timedelta(seconds=self.delete_interval_seconds)
@delete_interval.setter
def delete_interval(self, value):
self.delete_interval_seconds = value.seconds
def __unicode__(self):
return self.name
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