Implement save_ssh_key_in_vm_template_task

A celery task which first sends a power off signal to the VM with the
given ID and polls until it is powered off. Then, it updates the VM
template with the given ssh keys of the user and resumes it.

User is notified once the VM template has been updated.

datacenterlight/tasks.py

@@ -1,4 +1,5 @@
 from datetime import datetime
+from time import sleep
 
 from celery import current_task
 from celery.exceptions import MaxRetriesExceededError
@@ -8,7 +9,6 @@ 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
@@ -16,7 +16,7 @@ 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
+    get_all_public_keys, get_or_create_vm_detail
 )
 from utils.mailer import BaseEmail
 from utils.stripe_utils import StripeUtils
@@ -213,3 +213,84 @@ def create_vm_task(self, vm_template_id, user, specs, template, order_id):
             return
 
     return vm_id
+
+
+@app.task(bind=True, max_retries=settings.CELERY_MAX_RETRIES)
+def save_ssh_key_in_vm_template_task(self, user, vm_id, ssh_key_str):
+    logger.debug("Inside save_ssh_key_in_vm_template_task %s" % vm_id)
+
+    on_user = user.get('email')
+    on_pass = user.get('pass')
+
+    if on_user is None or on_pass is None:
+        logger.error(
+            "Either email or password not supplied. Can't save ssh key"
+        )
+        return
+
+    manager = OpenNebulaManager(email=on_user, password=on_pass)
+
+    # poweroff the vm
+    vm = manager.power_off_vm(vm_id)
+
+    powered_off = False
+    for t in range(15):
+        vm = manager.get_vm(vm_id)
+        if vm.str_state == 'POWEROFF':
+            logger.debug(
+                "VM %s has been powered off. Now adding ssh keys" % vm.id
+            )
+            powered_off = True
+            break
+        else:
+            logger.debug(
+                "VM {} has state {}. Waiting 2 more seconds to see if it " 
+                "powers off".format(vm.id, vm.str_state)
+            )
+            sleep(2)
+
+    if powered_off:
+        logger.debug(
+            "VM %s was powered off by api call" % vm.id
+        )
+        if manager.save_key_in_vm_template(vm_id=vm_id, ssh_key=ssh_key_str) > 0:
+            logger.debug(
+                "Added ssh_keys of user %s to VM %s successfully" %
+                (on_user, vm_id)
+            )
+            manager.resume(vm_id)
+            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 = {
+                'page_header': str(_("Adding of SSH key completed")),
+                'base_url': "{0}://{1}".format(user.get('request_scheme'),
+                                               user.get('request_host')),
+                'vm_detail_url': reverse('hosting:virtual_machines',
+                                     kwargs={'pk': vm_id}),
+                'vm_name': vm.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()
+        else:
+            logger.error(
+                "There was an error updating ssh keys of the VM %s" % vm_id
+            )
+    else:
+        logger.error(
+            "VM {} did not poweroff within 30 seconds after the poweroff api "
+            "call. Please, ask the admin to poweroff and add the key "
+            "manually.".format(vm_id)
+        )