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