import oca import socket from django.db import models from django.conf import settings from django.utils.functional import cached_property from membership.models import CustomUser from oca.pool import WrongNameError class VirtualMachineTemplate(models.Model): """This class represents an opennebula template.""" opennebula_id = models.IntegerField() base_price = models.FloatField() memory_price = models.FloatField() core_price = models.FloatField() disk_size_price = models.FloatField() @cached_property def template(self): template = OpenNebulaManager()._get_template(self.opennebula_id) return template def calculate_price(self): template = self.template.template price = int(template.vcpu) * self.core_price price += int(template.memory) / 1024 * self.memory_price try: price += int(template.disk.size) / 1024 * self.disk_size_price except AttributeError: for disk in template.disks: price += int(disk.size) / 1024 * self.disk_size_price return price def get_name(self): template = self.template return template.name def get_cores(self): template = self.template.template return int(template.vcpu) def get_disk_size(self): template = self.template.template disk_size = 0 for disk in template.disks: disk_size += int(disk.size) return disk_size / 1024 def get_memory(self): template = self.template.template return int(template.memory) / 1024 class VirtualMachine(models.Model): """This class represents an opennebula virtual machine.""" opennebula_id = models.IntegerField() owner = models.ForeignKey(CustomUser, related_name='virtual_machines') vm_template = models.ForeignKey(VirtualMachineTemplate) VM_STATE = { '0': 'INIT', '1': 'PENDING', '2': 'HOLD', '3': 'ACTIVE', '4': 'STOPPED', '5': 'SUSPENDED', '6': 'DONE', '8': 'POWEROFF', '9': 'UNDEPLOYED', '10': 'CLONING', '11': 'CLONING_FAILURE', } @cached_property def vm(self): manager = OpenNebulaManager(email=self.owner.email, password=self.owner.password[0:20], create_user=True) vm = manager._get_vm(self.opennebula_id) return vm def get_name(self): return self.vm.name def get_cores(self): return self.vm_template.get_cores() def get_disk_size(self): return self.vm_template.get_disk_size() def get_memory(self): return self.vm_template.get_memory() def get_id(self): return self.vm.id def get_ip(self): try: return self.vm.user_template.ungleich_public_ip except AttributeError: return '-' def get_state(self): return self.VM_STATE.get(str(self.vm.state)) def get_price(self): return self.vm_template.calculate_price() class OpenNebulaManager(): """This class represents an opennebula manager.""" def __init__(self, email=None, password=None, create_user=True): # Get oneadmin client self.oneadmin_client = self._get_opennebula_client( settings.OPENNEBULA_USERNAME, settings.OPENNEBULA_PASSWORD ) if not create_user or email is None: return # Get or create oppenebula user using given credentials self.opennebula_user = self._get_or_create_user( email, password ) # If opennebula user was created/obtained, get his client if self.opennebula_user: self.client = self._get_opennebula_client( email, password ) def _get_opennebula_client(self, username, password): return oca.Client("{0}:{1}".format( username, password), "{protocol}://{domain}:{port}{endpoint}".format( protocol=settings.OPENNEBULA_PROTOCOL, domain=settings.OPENNEBULA_DOMAIN, port=settings.OPENNEBULA_PORT, endpoint=settings.OPENNEBULA_ENDPOINT )) def _get_or_create_user(self, email, password): try: user_pool = self._get_user_pool() opennebula_user = user_pool.get_by_name(email) return opennebula_user except WrongNameError as wrong_name_err: opennebula_user = self.oneadmin_client.call(oca.User.METHODS['allocate'], email, password, 'core') return opennebula_user #TODO: Replace with logger except ConnectionRefusedError: print('Could not connect to host: {host} via protocol {protocol}'.format( host=settings.OPENNEBULA_DOMAIN, protocol=settings.OPENNEBULA_PROTOCOL) ) raise ConnectionRefusedError def _get_user_pool(self): try: user_pool = oca.UserPool(self.oneadmin_client) user_pool.info() #TODO: Replace with logger except ConnectionRefusedError: print('Could not connect to host: {host} via protocol {protocol}'.format( host=settings.OPENNEBULA_DOMAIN, protocol=settings.OPENNEBULA_PROTOCOL) ) raise ConnectionRefusedError return user_pool def _get_vm_pool(self): try: vm_pool = oca.VirtualMachinePool(self.client) vm_pool.info() except AttributeError: print('Could not connect via client, using oneadmin instead') vm_pool = oca.VirtualMachinePool(self.oneadmin_client) vm_pool.info(filter=-2) #TODO: Replace with logger 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() return vm_pool.get_by_id(vm_id) def create_vm(self, template_id): vm_id = self.oneadmin_client.call( oca.VmTemplate.METHODS['instantiate'], template_id, ) try: self.oneadmin_client.call( oca.VirtualMachine.METHODS['chown'], vm_id, self.opennebula_user.id, self.opennebula_user.group_ids[0] ) except AttributeError: print('Could not change owner, opennebula_user is not set.') 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() #TODO: Replace with logger 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. Used as label in view. :param cores: Amount of virtual cpu cores for the VM. :param memory: Amount of RAM for the VM (MB) :param disk_size: Amount of disk space for VM (MB) """ template_string_formatter = """ """ template_id = oca.VmTemplate.allocate( self.oneadmin_client, template_string_formatter.format( name=name, vcpu=cores, cpu=0.1*cores, size=1024 * disk_size, memory=1024 * memory ) ) return template_id def delete_template(self, template_id): self.oneadmin_client.call(oca.VmTemplate.METHODS['delete'], template_id, False)