Add memcached to heat

Change-Id: Id271178bfcebb0e097aaceaec9b88c1910de6786

devstack/lib/heat

@@ -168,7 +168,8 @@ function configure_heat {
     fi
 
     iniset $HEAT_CONF cache enabled "True"
-    iniset $HEAT_CONF cache backend "dogpile.cache.memory"
+    iniset $HEAT_CONF cache backend "dogpile.cache.memcached"
+    iniset $HEAT_CONF cache memcache_servers "mcrouter-memcached-heat:11211"
 
     if ! is_service_enabled c-bak; then
         iniset $HEAT_CONF volumes backups_enabled false
@@ -250,6 +251,10 @@ function start_heat {
 
 	proxy_pass_to_kubernetes /heat-api heat-api heat-wsgi-api
 	proxy_pass_to_kubernetes /heat-api-cfn heat-api-cfn heat-wsgi-api-cfn
+    
+	# (re)start memcached to make sure we have a clean memcache.
+	kubectl rollout restart statefulset/memcached-heat
+	sleep 10
 }
 
 # stop_heat() - Stop running processes

openstack_operator/heat.py

@@ -46,6 +46,7 @@ def create_or_resume(name, spec, **_):
 
     utils.create_or_update('heat/cronjob-service-clean.yml.j2',
                            name=name, spec=spec)
+    utils.create_or_update('heat/memcached.yml.j2', spec=spec)
     # deploy rabbitmq
     if not utils.ensure_secret("openstack", "heat-rabbitmq"):
         utils.create_or_update('heat/secret-rabbitmq.yml.j2',

openstack_operator/templates/heat/memcached.yml.j2

@@ -0,0 +1,32 @@
+---
+# 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: infrastructure.vexxhost.cloud/v1alpha1
+kind: Memcached
+metadata:
+  name: heat
+  namespace: openstack
+  labels:
+    {{ labels("heat") | indent(4) }}
+spec:
+  megabytes: 128
+{% if 'nodeSelector' in spec %}
+  nodeSelector:
+    {{ spec.nodeSelector | to_yaml | indent(4) }}
+{% endif %}
+{% if 'tolerations' in spec %}
+  tolerations:
+    {{ spec.tolerations | to_yaml | indent(4) }}
+{% endif %}