from datetime import datetime from celery import current_task from celery.exceptions import MaxRetriesExceededError from celery.utils.log import get_task_logger from django.conf import settings from django.core.mail import EmailMessage from django.urls import reverse from django.utils import translation from django.utils.translation import gettext_lazy as _ from dynamicweb2.pr_celery import app from hosting.models import HostingOrder from membership.models import CustomUser from opennebula_api.opennebula_manager import OpenNebulaManager from opennebula_api.serializers import VirtualMachineSerializer from utils.hosting_utils import ( get_all_public_keys, get_or_create_vm_detail ) from utils.mailer import BaseEmail from utils.stripe_utils import StripeUtils from .models import VMPricing logger = get_task_logger(__name__) def retry_task(task, exception=None): """Retries the specified task using a "backing off countdown", meaning that the interval between retries grows exponentially with every retry. Arguments: task: The task to retry. exception: Optionally, the exception that caused the retry. """ def backoff(attempts): return 2 ** attempts kwargs = { 'countdown': backoff(task.request.retries), } if exception: kwargs['exc'] = exception raise task.retry(**kwargs) @app.task(bind=True, max_retries=settings.CELERY_MAX_RETRIES) def create_vm_task(self, vm_template_id, user, specs, template, order_id): logger.debug( "Running create_vm_task on {}".format(current_task.request.hostname)) vm_id = None try: if 'pass' in user: on_user = user.get('username') on_pass = user.get('pass') logger.debug("Using user {user} to create VM".format(user=on_user)) vm_name = None else: on_user = settings.OPENNEBULA_USERNAME on_pass = settings.OPENNEBULA_PASSWORD logger.debug("Using OpenNebula admin user to create VM") vm_name = "{email}-{template_name}-{date}".format( email=user.get('email'), template_name=template.get('name'), date=int(datetime.now().strftime("%s"))) # Create OpenNebulaManager manager = OpenNebulaManager(email=on_user, password=on_pass) custom_user = CustomUser.objects.get(email=user.get('email')) pub_keys = get_all_public_keys(custom_user) if manager.email != settings.OPENNEBULA_USERNAME: manager.save_key_in_opennebula_user('\n'.join(pub_keys)) vm_id = manager.create_vm( template_id=vm_template_id, specs=specs, ssh_key='\n'.join(pub_keys), vm_name=vm_name ) if vm_id is None: raise Exception("Could not create VM") handle_metadata_and_emails(order_id, vm_id, manager, user, specs, template) except Exception as e: logger.error(str(e)) try: retry_task(self) except MaxRetriesExceededError: msg_text = 'Finished {} retries for create_vm_task'.format( self.request.retries) logger.error(msg_text) # Try sending email and stop email_data = { 'subject': '{} CELERY TASK ERROR: {}'.format(settings.DCL_TEXT, msg_text), 'from_email': current_task.request.hostname, 'to': settings.DCL_ERROR_EMAILS_TO_LIST, 'body': ',\n'.join(str(i) for i in self.request.args) } email = EmailMessage(**email_data) email.send() return return vm_id def handle_metadata_and_emails(order_id, vm_id, manager, user, specs, template): """ Handle's setting up of the metadata in Stripe and database and sending of emails to the user after VM creation :param order_id: the hosting order id :param vm_id: the id of the vm created :param manager: the OpenNebula Manager instance :param user: the user's dict passed to the celery task :param specs: the specification's dict passed to the celery task :param template: the template dict passed to the celery task :return: """ custom_user = CustomUser.objects.get(email=user.get('email')) final_price = ( specs.get('total_price') if 'total_price' in specs else specs.get('price') ) # Update HostingOrder with the created vm_id hosting_order = HostingOrder.objects.filter(id=order_id).first() error_msg = None try: hosting_order.vm_id = vm_id hosting_order.save() logger.debug( "Updated hosting_order {} with vm_id={}".format( hosting_order.id, vm_id ) ) except Exception as ex: error_msg = ( "HostingOrder with id {order_id} not found. This means that " "the hosting order was not created and/or it is/was not " "associated with VM with id {vm_id}. Details {details}".format( order_id=order_id, vm_id=vm_id, details=str(ex) ) ) logger.error(error_msg) stripe_utils = StripeUtils() result = stripe_utils.set_subscription_metadata( subscription_id=hosting_order.subscription_id, metadata={"VM_ID": str(vm_id)} ) if result.get('error') is not None: emsg = "Could not update subscription metadata for {sub}".format( sub=hosting_order.subscription_id ) logger.error(emsg) if error_msg: error_msg += ". " + emsg else: error_msg = emsg vm = VirtualMachineSerializer(manager.get_vm(vm_id)).data context = { 'name': user.get('name'), 'email': user.get('email'), 'cores': specs.get('cpu'), 'memory': specs.get('memory'), 'storage': specs.get('disk_size'), 'price': final_price, 'template': template.get('name'), 'vm_name': vm.get('name'), 'vm_id': vm['vm_id'], 'order_id': order_id } if error_msg: context['errors'] = error_msg if 'pricing_name' in specs: context['pricing'] = str(VMPricing.get_vm_pricing_by_name( name=specs['pricing_name'] )) email_data = { 'subject': settings.DCL_TEXT + " Order from %s" % context['email'], 'from_email': settings.DCL_SUPPORT_FROM_ADDRESS, 'to': ['dcl-orders@ungleich.ch'], 'body': "\n".join( ["%s=%s" % (k, v) for (k, v) in context.items()]), 'reply_to': [context['email']], } email = EmailMessage(**email_data) email.send() if 'pass' in user: lang = 'en-us' if user.get('language') is not None: logger.debug( "Language is set to {}".format(user.get('language'))) lang = user.get('language') translation.activate(lang) # Send notification to the user as soon as VM has been booked context = { 'base_url': "{0}://{1}".format(user.get('request_scheme'), user.get('request_host')), 'order_url': reverse('hosting:invoices'), 'page_header': _( 'Your New VM %(vm_name)s at Data Center Light') % { 'vm_name': vm.get('name')}, 'vm_name': vm.get('name') } email_data = { 'subject': context.get('page_header'), 'to': user.get('email'), 'context': context, 'template_name': 'new_booked_vm', 'template_path': 'hosting/emails/', 'from_address': settings.DCL_SUPPORT_FROM_ADDRESS, } email = BaseEmail(**email_data) email.send() logger.debug("New VM ID is {vm_id}".format(vm_id=vm_id)) if vm_id > 0: get_or_create_vm_detail(custom_user, manager, vm_id)