Add script to migrate RabbitMQ queues

Include custom text colours to make it clear which outputs are good and
which are bad.

Author: MoteHue

tools/rabbitmq-queue-migration.sh

@@ -0,0 +1,72 @@
+#! /usr/bin/bash
+
+set -ex
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+
+RABBITMQ_SERVICES_TO_RESTART=barbican,blazar,cinder,cloudkitty,designate,heat,ironic,keystone,magnum,manila,neutron,nova,octavia
+RABBITMQ_CONTAINER_NAME=rabbitmq
+
+if [[ ! $KAYOBE_CONFIG_PATH ]]; then
+    echo "${RED}Environment variable \$KAYOBE_CONFIG_PATH is not defined"
+    echo "${RED}Ensure your environment is set up to run kayobe commands"
+    exit 2
+fi
+
+if [[ ! "$1" = "--skip-checks" ]]; then
+    # Fail if clocks are not synced
+    if ! ( kayobe overcloud host command run -l controllers -b --command "timedatectl status | grep 'synchronized: yes'" ); then
+        echo "${RED}Failed precheck: Time not synced on controllers"
+        echo "${RED}Use 'timedatectl status' to check sync state"
+        echo "${RED}Either wait for sync or use 'chronyc makestep'"
+        exit 1
+    fi
+    kayobe overcloud service configuration generate --node-config-dir /tmp/rabbit-migration --kolla-tags none
+    # Fail if HA is set or quorum is not
+    if ! ( grep 'om_enable_queue_manager: true' $KOLLA_CONFIG_PATH/globals.yml && \
+       grep 'om_enable_rabbitmq_quorum_queues: true' $KOLLA_CONFIG_PATH/globals.yml && \
+       grep 'om_enable_rabbitmq_transient_quorum_queue: true' $KOLLA_CONFIG_PATH/globals.yml && \
+       grep 'om_enable_rabbitmq_stream_fanout: true' $KOLLA_CONFIG_PATH/globals.yml ); then
+          echo "${RED}Failed precheck: The following must be enabled: om_enable_queue_manager, om_enable_rabbitmq_quorum_queues, om_enable_rabbitmq_transient_quorum_queue, om_enable_rabbitmq_stream_fanout"
+          exit 1
+    fi
+fi
+
+# Generate new config, stop services using rabbit, and reset rabbit state
+kayobe overcloud service configuration generate --node-config-dir /etc/kolla --kolla-skip-tags rabbitmq-ha-precheck
+kayobe kolla ansible run "stop --yes-i-really-really-mean-it" -kt $RABBITMQ_SERVICES_TO_RESTART
+kayobe kolla ansible run rabbitmq-reset-state
+
+if [[ ! "$1" = "--skip-checks" ]]; then
+    # Fail if any queues still exist
+    sleep 20
+    # Note(mattcrees): We may the text grey here so the failed Ansible calls don't freak anyone out
+    CURRENTTERM=${TERM}
+    export TERM=xterm-mono
+    if ( kayobe overcloud host command run -l controllers -b --command "docker exec $RABBITMQ_CONTAINER_NAME rabbitmqctl list_queues name --silent | grep -v '^$'" ); then
+        export TERM=${CURRENTTERM}
+        echo -e "${RED}Failed check: RabbitMQ has not stopped properly, queues still exist"
+        exit 1
+    fi
+    # Fail if any exchanges still exist (excluding those starting with 'amq.')
+    if ( kayobe overcloud host command run -l controllers -b --command "docker exec $RABBITMQ_CONTAINER_NAME rabbitmqctl list_exchanges name --silent | grep -v '^$' | grep -v '^amq.'" ); then
+        export TERM=${CURRENTTERM}
+        echo -e "${RED}Failed check: RabbitMQ has not stopped properly, exchanges still exist"
+        exit 1
+    fi
+    export TERM=${CURRENTTERM}
+fi
+
+# Redeploy with quorum queues enabled
+kayobe kolla ansible run deploy-containers -kt $RABBITMQ_SERVICES_TO_RESTART
+
+if [[ ! "$1" = "--skip-checks" ]]; then
+    sleep 20
+    # Assert that at least one quorum queue exists on each controller
+    if ! ( kayobe overcloud host command run -l controllers -b --command "docker exec $RABBITMQ_CONTAINER_NAME rabbitmqctl list_queues durable --silent | grep false" > /dev/null 2>&1 ); then
+        echo -e "${GREEN}Queues migrated successfully" 
+    else
+        echo -e "${RED}Failed post-check: A controller has non-durable queues"
+    fi
+fi