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[kolla] Restarting RMQ

When I learned OpenStack at eBay we ran RMQ on dedicated VMs. My new employer runs kolla and everything is in containers. When I was running RMQ on VMs, it would lock up and we would have to restart it on all 3 VMs. If that didn't work, we had a "cold start" procedure where we would stop all 3, delete the contents of /var/lib/rabbitmq/mnesia/ and then run some commands to set the correct config and permissions before starting.

What is the correct way to restart RMQ in kolla? Should I log into the containers and restart services there, or use rabbitmqctl, or just stop and start the containers? Is stop/starting the containers the equivalent of the "cold start" procedure?

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