heat/heat/tests/test_instance_group.py

# vim: tabstop=4 shiftwidth=4 softtabstop=4

#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import copy

import eventlet
import mox

from heat.common import exception
from heat.common import template_format
from heat.engine.resources import autoscaling as asc
from heat.engine.resources import instance
from heat.engine import resource
from heat.engine import scheduler
from heat.tests.common import HeatTestCase
from heat.tests.utils import setup_dummy_db
from heat.tests.utils import parse_stack

ig_template = '''
{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "Template to create multiple instances.",
  "Parameters" : {},
  "Resources" : {
    "JobServerGroup" : {
      "Type" : "OS::Heat::InstanceGroup",
      "Properties" : {
        "LaunchConfigurationName" : { "Ref" : "JobServerConfig" },
        "Size" : "1",
        "AvailabilityZones" : ["nova"]
      }
    },

    "JobServerConfig" : {
      "Type" : "AWS::AutoScaling::LaunchConfiguration",
      "Properties": {
        "ImageId"           : "foo",
        "InstanceType"      : "m1.large",
        "KeyName"           : "test",
        "SecurityGroups"    : [ "sg-1" ],
        "UserData"          : "jsconfig data"
      }
    }
  }
}
'''


class InstanceGroupTest(HeatTestCase):
    def setUp(self):
        super(InstanceGroupTest, self).setUp()
        setup_dummy_db()

    def _stub_create(self, num):
        self.m.StubOutWithMock(eventlet, 'sleep')

        self.m.StubOutWithMock(instance.Instance, 'handle_create')
        self.m.StubOutWithMock(instance.Instance, 'check_create_complete')
        cookie = object()
        for x in range(num):
            instance.Instance.handle_create().AndReturn(cookie)
        instance.Instance.check_create_complete(cookie).AndReturn(False)
        eventlet.sleep(mox.IsA(int)).AndReturn(None)
        instance.Instance.check_create_complete(
            cookie).MultipleTimes().AndReturn(True)

    def create_instance_group(self, t, stack, resource_name):
        rsrc = asc.InstanceGroup(resource_name,
                                 t['Resources'][resource_name],
                                 stack)
        self.assertEqual(None, rsrc.validate())
        scheduler.TaskRunner(rsrc.create)()
        self.assertEqual(asc.InstanceGroup.CREATE_COMPLETE, rsrc.state)
        return rsrc

    def test_instance_group(self):

        t = template_format.parse(ig_template)
        stack = parse_stack(t)

        # start with min then delete
        self._stub_create(1)
        self.m.StubOutWithMock(instance.Instance, 'FnGetAtt')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('1.2.3.4')

        self.m.ReplayAll()
        rsrc = self.create_instance_group(t, stack, 'JobServerGroup')

        self.assertEqual('JobServerGroup', rsrc.FnGetRefId())
        self.assertEqual('1.2.3.4', rsrc.FnGetAtt('InstanceList'))
        self.assertEqual('JobServerGroup-0', rsrc.resource_id)
        self.assertRaises(resource.UpdateReplace,
                          rsrc.handle_update, {})

        rsrc.delete()
        self.m.VerifyAll()

    def test_missing_image(self):

        t = template_format.parse(ig_template)
        stack = parse_stack(t)

        rsrc = asc.InstanceGroup('JobServerGroup',
                                 t['Resources']['JobServerGroup'],
                                 stack)

        self.m.StubOutWithMock(instance.Instance, 'handle_create')
        not_found = exception.ImageNotFound(image_name='bla')
        instance.Instance.handle_create().AndRaise(not_found)

        self.m.ReplayAll()

        create = scheduler.TaskRunner(rsrc.create)
        self.assertRaises(exception.ResourceFailure, create)
        self.assertEqual(asc.InstanceGroup.CREATE_FAILED, rsrc.state)

        self.m.VerifyAll()

    def test_update_size(self):
        t = template_format.parse(ig_template)
        properties = t['Resources']['JobServerGroup']['Properties']
        properties['Size'] = '2'
        stack = parse_stack(t)

        self._stub_create(2)
        self.m.ReplayAll()
        rsrc = self.create_instance_group(t, stack, 'JobServerGroup')
        self.assertEqual('JobServerGroup-0,JobServerGroup-1',
                         rsrc.resource_id)

        self.m.VerifyAll()
        self.m.UnsetStubs()

        # Increase min size to 5
        self._stub_create(3)
        self.m.StubOutWithMock(instance.Instance, 'FnGetAtt')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('10.0.0.2')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('10.0.0.3')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('10.0.0.4')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('10.0.0.5')
        instance.Instance.FnGetAtt('PublicIp').AndReturn('10.0.0.6')

        self.m.ReplayAll()

        update_snippet = copy.deepcopy(rsrc.parsed_template())
        update_snippet['Properties']['Size'] = '5'
        self.assertEqual(None, rsrc.handle_update(update_snippet))
        assert_str = ','.join(['JobServerGroup-%s' % x for x in range(5)])
        self.assertEqual(assert_str,
                         rsrc.resource_id)
        self.assertEqual('10.0.0.2,10.0.0.3,10.0.0.4,10.0.0.5,10.0.0.6',
                         rsrc.FnGetAtt('InstanceList'))

        rsrc.delete()
        self.m.VerifyAll()