Add HPA in heat

Change-Id: I32138845e976a12340e403d96900b425a08e80ed

openstack_operator/heat.py

@@ -42,10 +42,14 @@ def create_or_resume(name, spec, **_):
                                config_hash=config_hash)
         utils.create_or_update('heat/service.yml.j2',
                                name=name, component=component)
+        utils.create_or_update('heat/horizontalpodautoscaler.yml.j2',
+                               name=name, component=component)
 
     utils.create_or_update('heat/deployment.yml.j2',
                            name=name, spec=spec, component='engine',
                            config_hash=config_hash)
+    utils.create_or_update('heat/horizontalpodautoscaler.yml.j2',
+                           name=name, component='engine')
     if "ingress" in spec:
         utils.create_or_update('heat/ingress.yml.j2',
                                name=name, spec=spec)

openstack_operator/templates/heat/horizontalpodautoscaler.yml.j2

@@ -0,0 +1,30 @@
+---
+# Copyright 2020 VEXXHOST, Inc.
+#
+# 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.
+
+apiVersion: autoscaling/v1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: heat-{{ component }}
+  namespace: openstack
+  labels:
+    {{ labels("heat", name) | indent(4) }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: heat-{{ component }}
+  minReplicas: 2
+  maxReplicas: 10
+  targetCPUUtilizationPercentage: 90