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.core.urlresolvers import reverse
from django.utils import translation
from django.utils.translation import ugettext_lazy as _
from time import sleep
from dynamicweb.celery import app
from hosting.models import HostingOrder
from membership.models import CustomUser
from opennebula_api.models import OpenNebulaManager
from opennebula_api.serializers import VirtualMachineSerializer
from utils.hosting_utils import (
get_all_public_keys, get_or_create_vm_detail, ping_ok
)
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:
final_price = (
specs.get('total_price') if 'total_price' in specs
else specs.get('price')
)
if 'pass' in user:
on_user = user.get('email')
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)
vm_id = manager.create_vm(
template_id=vm_template_id,
specs=specs,
ssh_key=settings.ONEADMIN_USER_SSH_PUBLIC_KEY,
vm_name=vm_name
)
if vm_id is None:
raise Exception("Could not create VM")
# 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': ['info@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:orders',
kwargs={'pk': order_id}),
'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()
# try to see if we have the IPv6 of the new vm and that if the ssh
# keys can be configured
vm_ipv6 = manager.get_ipv6(vm_id)
logger.debug("New VM ID is {vm_id}".format(vm_id=vm_id))
if vm_ipv6 is not None:
custom_user = CustomUser.objects.get(email=user.get('email'))
get_or_create_vm_detail(custom_user, manager, vm_id)
if custom_user is not None:
public_keys = get_all_public_keys(custom_user)
keys = [{'value': key, 'state': True} for key in
public_keys]
if len(keys) > 0:
logger.debug(
"Calling configure on {host} for "
"{num_keys} keys".format(
host=vm_ipv6, num_keys=len(keys)
)
)
# Let's wait until the IP responds to ping before we
# run the cdist configure on the host
did_manage_public_key = False
for i in range(0, 15):
if ping_ok(vm_ipv6):
logger.debug(
"{} is pingable. Doing a "
"manage_public_key".format(vm_ipv6)
)
sleep(10)
manager.manage_public_key(
keys, hosts=[vm_ipv6]
)
did_manage_public_key = True
break
else:
logger.debug(
"Can't ping {}. Wait 5 secs".format(
vm_ipv6
)
)
sleep(5)
if not did_manage_public_key:
emsg = ("Waited for over 75 seconds for {} to be "
"pingable. But the VM was not reachable. "
"So, gave up manage_public_key. Please do "
"this manually".format(vm_ipv6))
logger.error(emsg)
email_data = {
'subject': '{} CELERY TASK INCOMPLETE: {} not '
'pingable for 75 seconds'.format(
settings.DCL_TEXT, vm_ipv6
),
'from_email': current_task.request.hostname,
'to': settings.DCL_ERROR_EMAILS_TO_LIST,
'body': emsg
}
email = EmailMessage(**email_data)
email.send()
else:
logger.debug("VM's ipv6 is None. Hence not created VMDetail")
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