Add Nova anti-affinity rules

Change-Id: I62a94daf47983443b557f038217b6a0d35761c81
Closes-Bug: #1625017

meta/io.murano/Classes/resources/Instance.yaml

@@ -83,9 +83,12 @@ Properties:
       - network: $.class(Network).notNull()
         ipList: [$.string().notNull()]
     Usage: Out
+    #policies: anti-affinity, affinity
+  instanceAffinityGroup:
+    Contract: $.class(InstanceAffinityGroup)
 
 Methods:
-  initialize:
+  .init:
     Body:
       - $._environment: $.find(std:Environment).require()
       - $.agent: new(sys:Agent, host => $)
@@ -93,6 +96,14 @@ Methods:
       - $.instanceTemplate: {}
       - $._floatingIpOutputName: null
 
+      - $.volumes.values().concat($this.blockDevices.volume).select(
+          sys:GC.subscribeDestruction($, $this, _onReferencedResourceDelete))
+
+      - If: $.instanceAffinityGroup != null
+        Then: sys:GC.subscribeDestruction(
+          $this.instanceAffinityGroup, $this, _onReferencedResourceDelete)
+
+
   # Called after the Instance template pieces are in place. It
   # is at this stage alterations to the template should be made
   prepareStackTemplate:
@@ -148,7 +159,11 @@ Methods:
           - $properties.block_device_mapping_v2: $bdmDefinition
         Else:
           $properties.image: $.image
-
+      - If: $.instanceAffinityGroup != null
+        Then:
+          - $.instanceAffinityGroup.deploy()
+          - $properties.scheduler_hints:
+              group: $.instanceAffinityGroup.getRef()
       - $template:
           resources:
             $.name:
@@ -160,7 +175,6 @@ Methods:
               description: format('ID of {0} instance', $.name)
               value:
                 get_resource: $.name
-
       - $.instanceTemplate: $.instanceTemplate.mergeWith($template)
       - $.volumes.items().select(
           $.unpack(path, volume) -> $this.attachVolume($path, $volume))
@@ -326,6 +340,15 @@ Methods:
 
           - $region.stack.setTemplate($template)
 
+  _onReferencedResourceDelete:
+    Arguments:
+      - resource:
+          Contract: $.class(std:CloudResource).notNull()
+    Body:
+      - If: sys:GC.isDoomed($this)
+        Then:
+          - $.beginReleaseResources()
+
   endReleaseResources:
     Body:
       - $region: $.getRegion()

meta/io.murano/Classes/resources/InstanceAffinityGroup.yaml

@@ -0,0 +1,64 @@
+#  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.
+
+Namespaces:
+  std: io.murano
+  =: io.murano.resources
+
+Name: InstanceAffinityGroup
+Extends: std:CloudResource
+
+Properties:
+
+  affinity:
+    Contract: $.bool().notNull()
+    Default: false   #affinity: true, anti-affinity: false
+
+
+Methods:
+  deploy:
+    Body:
+      - If: $.affinity
+        Then:
+          - $policies: ['affinity']
+        Else:
+          - $policies: ['anti-affinity']
+      - $name: $._getHeatName()
+      - $affinityTemplate:
+          resources:
+            $name:
+              type: 'OS::Nova::ServerGroup'
+              properties:
+                name: $name
+                policies: $policies
+      - $region: $.getRegion()
+      - $region.stack.updateTemplate($affinityTemplate)
+      - $region.stack.push(async => true)
+
+  .destroy:
+    Body:
+      - $name: $._getHeatName()
+      - $region: $.getRegion()
+      - $template: $region.stack.current()
+      - $template.resources: $template.resources.delete($name)
+      - $region.stack.setTemplate($template)
+      - $region.stack.push(async => true)
+
+
+  getRef:
+    Body:
+      - Return:
+          get_resource: $._getHeatName()
+
+  _getHeatName:
+    Body:
+      - Return: format('NovaServerGroup-{0}', id($this))

meta/io.murano/manifest.yaml

@@ -58,6 +58,7 @@ Classes:
   io.murano.resources.CinderVolumeBackup: resources/CinderVolumeBackup.yaml
   io.murano.resources.CinderVolumeSnapshot: resources/CinderVolumeSnapshot.yaml
   io.murano.resources.MetadataAware: resources/MetadataAware.yaml
+  io.murano.resources.InstanceAffinityGroup: resources/InstanceAffinityGroup.yaml
 
   io.murano.system.Agent: system/Agent.yaml
   io.murano.system.AgentListener: system/AgentListener.yaml