Add upgrade-prerequisites script for CI

tools/upgrade-prerequisites.sh

@@ -0,0 +1,48 @@
+#! /usr/bin/bash
+
+# This script is intended to be run in CI to test upgrades.
+# It executes any preparation steps that must be perfomed before upgrading
+# OpenStack services.
+
+# NOTE(upgrade): This script is unique to each release. It may not be required
+# for some releases.
+
+set -ex
+
+function prechecks() {
+    if [[ ! $KAYOBE_CONFIG_PATH ]]; then
+        echo "Environment variable \$KAYOBE_CONFIG_PATH is not defined"
+        echo "Ensure your environment is set up to run kayobe commands"
+        exit 2
+    fi
+}
+
+function rabbit_upgrade() {
+    # Ensure RabbitMQ is upgraded to 3.13
+    if kayobe overcloud host command run -l controllers -b --command "docker exec rabbitmq rabbitmqctl --version | grep -F 3.11." --show-output; then
+        kayobe kolla ansible run "rabbitmq-upgrade 3.12"
+    fi
+    sleep 200
+    if kayobe overcloud host command run -l controllers -b --command "docker exec rabbitmq rabbitmqctl --version | grep -F 3.12." --show-output; then
+        kayobe kolla ansible run "rabbitmq-upgrade 3.13"
+    fi
+}
+
+function rabbit_migration() {
+    if ! kayobe overcloud host command run -l controllers -b --command "docker exec $RABBITMQ_CONTAINER_NAME rabbitmqctl list_queues type | grep quorum"; then
+        # Set quorum flag, execute RabbitMQ queue migration script, unset quorum flag (to avoid git conflicts)
+        sed -i -e 's/om_enable_rabbitmq_high_availability: true/om_enable_rabbitmq_high_availability: false/' \
+               -e 's/om_enable_rabbitmq_quorum_queues: false/om_enable_rabbitmq_quorum_queues: true/' \
+            $KAYOBE_CONFIG_PATH/environments/$KAYOBE_ENVIRONMENT/kolla/globals.yml
+
+        $KAYOBE_CONFIG_ROOT/tools/rabbitmq-quorum-migration.sh
+
+        sed -i -e 's/om_enable_rabbitmq_high_availability: false/om_enable_rabbitmq_high_availability: true/' \
+               -e 's/om_enable_rabbitmq_quorum_queues: true/om_enable_rabbitmq_quorum_queues: false/' \
+            $KAYOBE_CONFIG_PATH/environments/$KAYOBE_ENVIRONMENT/kolla/globals.yml
+    fi
+}
+
+prechecks
+rabbit_upgrade
+rabbit_migration