root / db / models.py @ 6ce6dee1
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# vim: ts=4 sts=4 et ai sw=4 fileencoding=utf-8
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from django.conf import settings |
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from django.db import models |
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from django.contrib.auth.models import User |
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from django.utils.translation import gettext_lazy as _ |
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import datetime |
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import vocabs |
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backend_prefix_id = settings.BACKEND_PREFIX_ID |
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#this needs to be called not only from inside VirtualMachine.
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#atm it is not working with the current ganeti naming - machine1, machine2
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def id_from_instance_name(name): |
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""" Returns VirtualMachine's Django id, given a ganeti machine name.
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Strips the ganeti prefix atm. Needs a better name!
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"""
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return '%s' % (str(name).strip(backend_prefix_id)) |
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class Limit(models.Model): |
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description = models.CharField(max_length=45)
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class Meta: |
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verbose_name = u'User limit'
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def __unicode__(self): |
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return self.description |
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class OceanUser(models.Model): |
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name = models.CharField(max_length=255)
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credit = models.IntegerField() |
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quota = models.IntegerField() |
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created = models.DateField() |
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monthly_rate = models.IntegerField() |
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user = models.ForeignKey(User, unique=True)
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limits = models.ManyToManyField(Limit, through='UserLimit')
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class Meta: |
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verbose_name = u'Ocean User'
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def __unicode__(self): |
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return self.name |
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def _total_hours(self, start, end): |
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"""Calculate duration in hours"""
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td = end - start |
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sec = float(td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / float(10**6) |
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return float(sec) / float(60.0*60.0) |
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def charge_credits(self, cost, start, end): |
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"""Reduce user credits for specified duration.
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Returns amount of credits remaining. Negative if the user surpassed his limit."""
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total_cost = float(cost)*self._total_hours(start, end) |
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self.credit = self.credit - round(total_cost) |
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rcredit = self.credit
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if self.credit < 0: |
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self.credit = 0 |
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return rcredit
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def allocate_credits(self): |
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"""Allocate credits. Add monthly rate to user credit reserve."""
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self.credit = self.credit + self.monthly_rate |
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# ensure that the user has not more credits than his quota
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if self.credit > self.quota: |
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self.credit = self.quota |
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class UserLimit(models.Model): |
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user = models.ForeignKey(OceanUser) |
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limit = models.ForeignKey(Limit) |
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value = models.IntegerField() |
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class Meta: |
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unique_together = ('user', 'limit') |
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verbose_name = u'Enforced limit for user'
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def __unicode__(self): |
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return u'Limit %s for user %s: %d' % (self.limit, self.user, self.value) |
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class Flavor(models.Model): |
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cpu = models.IntegerField(default=0)
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ram = models.IntegerField(default=0)
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disk = models.IntegerField(default=0)
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class Meta: |
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verbose_name = u'Virtual machine flavor'
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def _get_name(self): |
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"""Returns flavor name"""
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return u'C%dR%dD%d' % ( self.cpu, self.ram, self.disk ) |
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def _get_cost_inactive(self): |
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self._update_costs()
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return self._cost_inactive |
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def _get_cost_active(self): |
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self._update_costs()
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return self._cost_active |
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def _update_costs(self): |
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# if _cost
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if '_cost_active' not in dir(self): |
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fch = FlavorCostHistory.objects.filter(flavor=self).order_by('-effective_from')[0] |
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self._cost_active = fch.cost_active
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self._cost_inactive = fch.cost_inactive
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name = property(_get_name)
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cost_active = property(_get_cost_active)
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cost_inactive = property(_get_cost_inactive)
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def __unicode__(self): |
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return self.name |
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class FlavorCostHistory(models.Model): |
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cost_active = models.PositiveIntegerField() |
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cost_inactive = models.PositiveIntegerField() |
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effective_from = models.DateField() |
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flavor = models.ForeignKey(Flavor) |
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class Meta: |
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verbose_name = u'Pricing history for flavors'
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def __unicode__(self): |
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return u'Costs (up, down)=(%d, %d) for %s since %s' % ( cost_active, cost_inactive, flavor.name, effective_from ) |
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class VirtualMachine(models.Model): |
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name = models.CharField(max_length=255)
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created = models.DateTimeField() |
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state = models.CharField(choices=vocabs.STATES, max_length=30)
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charged = models.DateTimeField() |
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imageid = models.IntegerField() |
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hostid = models.CharField(max_length=100)
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server_label = models.CharField(max_length=100)
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image_version = models.CharField(max_length=100)
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ipfour = models.IPAddressField() |
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ipsix = models.CharField(max_length=100)
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owner = models.ForeignKey(OceanUser) |
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flavor = models.ForeignKey(Flavor) |
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class Meta: |
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verbose_name = u'Virtual machine instance'
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get_latest_by = 'created'
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def __unicode__(self): |
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return self.name |
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def _get_backend_id(self): |
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"""Returns the backend id for this VM by prepending backend-prefix."""
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return '%s%s' % (backend_prefix_id, str(self.id)) |
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backend_id = property(_get_backend_id)
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class VirtualMachineGroup(models.Model): |
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"Groups of VM's for OceanUsers"
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name = models.CharField(max_length=255)
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owner = models.ForeignKey(User) |
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machines = models.ManyToManyField(VirtualMachine) |
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created = models.DateTimeField(help_text=_("Group creation date"), default=datetime.datetime.now)
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class Meta: |
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verbose_name = u'Virtual Machine Group'
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verbose_name_plural = 'Virtual Machine Groups'
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ordering = ['name']
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def __unicode__(self): |
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return self.name |
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class VirtualMachineMetadata(models.Model): |
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meta_key = models.CharField(max_length=50)
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meta_value = models.CharField(max_length=500)
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vm = models.ForeignKey(VirtualMachine) |
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class Meta: |
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verbose_name = u'Key-value pair of metadata for a VM.'
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def __unicode__(self): |
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return u'%s, %s for %s' % ( self.key, self.value, self.vm.name ) |
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class AccountingLog(models.Model): |
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vm = models.ForeignKey(VirtualMachine) |
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date = models.DateTimeField() |
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state = models.CharField(choices=vocabs.STATES, max_length=30)
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class Meta: |
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verbose_name = u'Accounting log'
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def __unicode__(self): |
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return u'%s %s %s' % ( self.vm.name, self.date, self.state ) |
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class Image(models.Model): |
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name = models.CharField(max_length=255, help_text=_('description')) |
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updated = models.DateTimeField(help_text=_("Image update date"))
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created = models.DateTimeField(help_text=_("Image creation date"), default=datetime.datetime.now)
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state = models.CharField(choices=vocabs.STATES, max_length=30)
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description = models.TextField(help_text=_('description'))
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serverid = models.IntegerField(help_text=_('description'))
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vm = models.ForeignKey(VirtualMachine) |
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owner = models.ForeignKey(User,blank=True, null=True) |
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class Meta: |
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verbose_name = u'Image'
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def __unicode__(self): |
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return u'%s' % ( self.name ) |