Add "rabbit-rescue" script

This script was created to fix a broken/blank RabbitMQ install.
It was found useful to some other OSA operators and is being added here.

Change-Id: Ibd81a839e9cba1de6980d46a01f0df0ea68eb77d

rabbit-rescue/README.md

@@ -0,0 +1,30 @@
+# Rabbit-Rescue
+
+Use this script to rebuild the vhosts and permissions in Rabbitmq in case it gets borked. <br>*(Don't even ask how I managed to do this...)*
+
+This script is loosely based on informatoin gleaned from [this RedHat article](https://access.redhat.com/articles/1167113), and was added to this repo based on [this conversation](http://eavesdrop.openstack.org/irclogs/%23openstack-ansible/%23openstack-ansible.2020-03-11.log.html). <br>Apparently I'm not the only one who has inadvertently destroyed their RabbitMQ installation, so this may be helpful to others in the future.
+
+Note: For clustered installations, this needs to run only on a single node.
+
+## Usage:
+
+- Clone this repo into /opt on your deployment host.
+
+- Edit the Bash array `all_services` and populate with the services you were using in RabbitMQ.
+
+- Populate the service secrets with the information found in your `/etc/openstack_deploy/user_secrets.yml` file.
+  - _(this is quite possibly something we could try to do automatically in a future update)_
+
+- Execute this from the deployment host, targeting one of your RabbitMQ containers:
+  - ```
+    # cd /opt/openstack-ansible
+    # ansible rabbit_mq_container -m copy -a 'src=/opt/openstack-ops/rabbit-rescue/rabbit-rescue.sh dest=/tmp/rabbit-rescue.sh mode=preserve'
+    # ansible rabbit_mq_container -m shell -a '/tmp/rabbit-rescue.sh'
+    ```
+  - Profit!
+
+## Alternative Usage:
+
+- Copy the script file down to one of your RabbitMQ Containers.
+
+- Edit the contents per the above instructions, and execute it.

rabbit-rescue/rabbit-rescue.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+#
+# Copyright 2020 Henry Bonath <henry@thebonaths.com>
+#
+# 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.
+#
+# **Use this script at your own risk - we do our best to not do any damage but YMMV!**
+
+
+# All Services - populate this array with the names of the services you are running in your cluster
+# some defaults are provided below
+all_services=( cinder nova neutron heat glance ceilometer )
+
+# Rabbit Secrets - populate the vars below with information found in /etc/openstack_deploy/user_secrets.yml
+# These will be used when re-creating the vhosts and *must* be named based on the service names above
+cinder_oslomsg_rpc_password=MYSECRETcinderPassw0rd
+nova_oslomsg_rpc_password=MYSECRETnovaPassw0rd
+neutron_oslomsg_rpc_password=MYSECRETneutronPassw0rd
+heat_oslomsg_rpc_password=MYSECRETheatPassw0rd
+glance_oslomsg_rpc_password=MYSECRETglancePassw0rd
+ceilometer_oslomsg_rpc_password=MYSECRETceilopmeterPassw0rd
+
+
+for service in "${all_services[@]}"; do
+
+  if ($(rabbitmqctl list_vhosts | grep "/$service" > /dev/null)); then
+    echo "/$service vhost already exists, skipping."
+  else
+    echo "Creating /$service vhost:"
+    rabbitmqctl add_vhost /$service
+  fi
+
+  if ($(rabbitmqctl list_users | grep "$service" > /dev/null)); then
+    echo "$service user already exists, skipping."
+  else
+    echo "Creating $service user:"
+    secret=$(printf \$"$service"_oslomsg_rpc_password)
+    eval $(echo rabbitmqctl add_user $service $secret)
+  fi
+
+  if ($(rabbitmqctl list_permissions --vhost /$service | grep 'does not exist' > /dev/null)); then
+    echo "Setting $service permissions:"
+    rabbitmqctl set_permissions $service -p /$service ".*" ".*" ".*"
+  else
+    echo "$service permissions already set, skipping."
+  fi
+
+done
+
+
+exit 0