dashboard, manager, vm: adds basic auto migration view and fake auto_migrate task

circle/circle/settings/base.py

@@ -587,3 +587,6 @@ REQUEST_HOOK_URL = get_env_variable("REQUEST_HOOK_URL", "")
 SSHKEY_EMAIL_ADD_KEY = False
 
 TWO_FACTOR_ISSUER = get_env_variable("TWO_FACTOR_ISSUER", "CIRCLE")
+
+# Default value is every day at midnight
+AUTO_MIGRATION_CRONTAB = get_env_variable("AUTO_MIGRATION_CRONTAB", "0 0 * * *")

circle/dashboard/forms.py

@@ -1697,3 +1697,11 @@ class TwoFactorConfirmationForm(forms.Form):
         totp = pyotp.TOTP(self.user.profile.two_factor_secret)
         if not totp.verify(self.cleaned_data.get('confirmation_code')):
             raise ValidationError(_("Invalid confirmation code."))
+
+
+class AutoMigrationForm(forms.Form):
+    minute = forms.CharField()
+    hour = forms.CharField()
+    day_of_month = forms.CharField()
+    month_of_year = forms.CharField()
+    day_of_week = forms.CharField()

circle/dashboard/static/dashboard/dashboard.less

@@ -1079,6 +1079,10 @@ textarea[name="new_members"] {
   max-width: 100%;
 }
 
+#node-list-auto-migration-body {
+  padding: 20px;
+}
+
 #vm-list-table td.state,
 #vm-list-table td.memory {
   white-space: nowrap;

circle/dashboard/static/dashboard/node-list.js

@@ -3,4 +3,11 @@ $(function() {
     // find disabled nodes, set danger (red) on the rows
     $('.node-disabled').closest("tr").addClass('danger');
   });
+  $('#reschedule-now').click(function() {
+    $.get($(this).attr('href'), function(data){
+      highlight = data.result === 'ok' ? 'success' : 'danger';
+      addMessage(data.message, highlight);
+    });
+    return false;
+  });
 });

circle/dashboard/templates/dashboard/node-list.html

@@ -41,4 +41,23 @@
   </div><!-- -col-md-12 -->
 </div><!-- .row -->
 
+<div class="row">
+  <div class="col-md-12">
+    <div class="panel panel-default">
+      <div class="panel-heading">
+        <a id="reschedule-now" class="btn btn-danger pull-right" href="{% url "dashboard.views.reschedule" %}">
+          <i class="fa fa-magic"></i> {% trans "Reschedule now" %}
+        </a>
+        <h3 class="no-margin"><i class="fa fa-truck"></i> {% trans "Virtual machine auto migration" %}</h3>
+      </div>
+      <div id="node-list-auto-migration-body">
+        <h1>Crontab</h1>
+        <form>
+          {{ auto_migration_form.as_p }}
+        </form>
+      </div>
+    </div>
+  </div><!-- -col-md-12 -->
+</div><!-- .row -->
+
 {% endblock %}

circle/dashboard/urls.py

@@ -56,6 +56,7 @@ from .views import (
     MessageList, MessageDetail, MessageCreate, MessageDelete,
     EnableTwoFactorView, DisableTwoFactorView,
     AclUserGroupAutocomplete, AclUserAutocomplete,
+    RescheduleView,
 )
 from .views.vm import vm_ops, vm_mass_ops
 from .views.node import node_ops
@@ -153,6 +154,8 @@ urlpatterns = [
          r'(?P<time>[0-9]{1,2}[hdwy])$'),
         NodeListGraphView.as_view(),
         name='dashboard.views.node-list-graph'),
+    url(r'^node/reschedule/$', RescheduleView.as_view(),
+        name="dashboard.views.reschedule"),
     url((r'^template/(?P<pk>\d+)/graph/(?P<metric>[a-z]+)/'
          r'(?P<time>[0-9]{1,2}[hdwy])$'),
         TemplateGraphView.as_view(),

circle/dashboard/views/node.py

@@ -25,7 +25,7 @@ from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import reverse_lazy
 from django.db.models import Count
 from django.forms.models import inlineformset_factory
-from django.http import HttpResponse
+from django.http import HttpResponse, JsonResponse
 from django.shortcuts import redirect
 from django.template.loader import render_to_string
 from django.utils.translation import ugettext as _
@@ -37,11 +37,14 @@ from django_tables2 import SingleTableView
 from firewall.models import Host
 from vm.models import Node, NodeActivity, Trait
 from vm.tasks.vm_tasks import check_queue
+from vm.tasks.local_periodic_tasks import auto_migrate
 
-from ..forms import TraitForm, HostForm, NodeForm
+from ..forms import TraitForm, HostForm, NodeForm, AutoMigrationForm
 from ..tables import NodeListTable
 from .util import AjaxOperationMixin, OperationView, GraphMixin, DeleteViewBase
 
+from manager.mancelery import crontab_parser
+
 
 def get_operations(instance, user):
     ops = []
@@ -190,6 +193,14 @@ class NodeList(LoginRequiredMixin, GraphMixin, SingleTableView):
     table_class = NodeListTable
     table_pagination = False
 
+    def get_crontab(self):
+        return crontab_parser(settings.AUTO_MIGRATION_CRONTAB)
+
+    def get_context_data(self):
+        context = super(NodeList, self).get_context_data()
+        context["auto_migration_form"] = AutoMigrationForm(self.get_crontab())
+        return context
+
     def get(self, *args, **kwargs):
         if not self.request.user.has_perm('vm.view_statistics'):
             raise PermissionDenied()
@@ -356,3 +367,23 @@ class NodeActivityDetail(LoginRequiredMixin, SuperuserRequiredMixin,
         ).order_by('-started').select_related())
         ctx['icon'] = _get_activity_icon(self.object)
         return ctx
+
+
+class RescheduleView(SuperuserRequiredMixin, View):
+    def get(self, *args, **kwargs):
+        try:
+            auto_migrate.apply_async(queue='localhost.man.slow')
+        except Exception as e:
+            msg = str(e)
+            result = 'error'
+        else:
+            result = 'ok'
+            msg = _('Reschedule has started.')
+        if self.request.is_ajax():
+            return JsonResponse({'result': result, 'message': msg})
+        else:
+            if result == 'ok':
+                messages.success(self.request, msg)
+            else:
+                messages.error(self.request, msg)
+        return redirect('dashboard.views.node-list')

circle/manager/mancelery.py

@@ -17,12 +17,26 @@
 
 from celery import Celery
 from celery.signals import worker_ready
+from celery.schedules import crontab
 from datetime import timedelta
 from kombu import Queue, Exchange
 from os import getenv
 
+
 HOSTNAME = "localhost"
 QUEUE_NAME = HOSTNAME + '.man'
+AUTO_MIGRATION_CRONTAB = getenv('AUTO_MIGRATION_CRONTAB', '0 0 * * *')
+
+
+def crontab_parser(crontab):
+    fields = crontab.split(' ')
+    return dict(
+        minute=fields[0],
+        hour=fields[1],
+        day_of_month=fields[2],
+        month_of_year=fields[3],
+        day_of_week=fields[4],
+    )
 
 
 celery = Celery('manager',
@@ -55,6 +69,11 @@ celery.conf.update(
             'schedule': timedelta(hours=24),
             'options': {'queue': 'localhost.man'}
         },
+        'vm.local_periodic_tasks': {
+            'task': 'vm.tasks.local_periodic_tasks.auto_migrate',
+            'schedule': crontab(**crontab_parser(AUTO_MIGRATION_CRONTAB)),
+            'options': {'queue': 'localhost.man.slow'},
+        },
     }
 
 )

circle/vm/tasks/local_periodic_tasks.py

@@ -76,3 +76,11 @@ def garbage_collector(timeout=15):
             i.notify_owners_about_expiration()
         else:
             logger.debug("Instance %d didn't expire." % i.pk)
+
+
+@celery.task(ignore_result=True)
+def auto_migrate():  # Dummy implementation
+    import time
+    logger.info("Auto migration has started.")
+    time.sleep(10)
+    logger.info("Auto migration has finished.")