Add rpc_backend override in devstack

Change-Id: Ibc641fc1a52f77b50a1ce193c081cf401b002973

devstack/lib/common

@@ -90,3 +90,14 @@ spec:
 EOF
 }
 export -f _get_or_create_endpoint_with_interface
+
+# Get plain data from the specified secret
+# Usage: get_data_from_secret <secret> <namespace> <key>
+function get_data_from_secret {
+	local secret=$1
+	local ns=$2
+	local key=$3
+	local data=$(kubectl get secret -n $ns $secret -o jsonpath="{.data.$key}" | base64 --decode)
+	echo $data
+}
+export -f get_data_from_secret

devstack/lib/rpc_backend

@@ -0,0 +1,33 @@
+#!/bin/bash
+#
+# 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.
+
+
+# iniset rpc configuration
+function iniset_k8s_rpc_backend {
+    local package=$1
+    local file=$2
+    local section=${3:-DEFAULT}
+	local conn_url=$4
+
+	iniset $file $section transport_url $conn_url
+	if [ -n "$RABBIT_HEARTBEAT_TIMEOUT_THRESHOLD" ]; then
+		iniset $file oslo_messaging_rabbit heartbeat_timeout_threshold $RABBIT_HEARTBEAT_TIMEOUT_THRESHOLD
+	fi
+	if [ -n "$RABBIT_HEARTBEAT_RATE" ]; then
+		iniset $file oslo_messaging_rabbit heartbeat_rate $RABBIT_HEARTBEAT_RATE
+	fi
+}
+export -f iniset_k8s_rpc_backend

devstack/settings

@@ -19,3 +19,4 @@ define_plugin openstack-operator
 source $DEST/openstack-operator/devstack/lib/common
 source $DEST/openstack-operator/devstack/lib/glance
 source $DEST/openstack-operator/devstack/lib/keystone
+source $DEST/openstack-operator/devstack/lib/rpc_backend