Contain Yourself
With the release of Red Hat OpenStack 13, the move to containerized overcloud services is complete. Traditional systemd services such as RabbitMQ, Haproxy, Mariadb, etc, are all now running as containers in the overcloud. This move to containers is meant to provide additional stability, control, and security to the platform. Future upgrades should be easier, and future deploys should be more flexible.
However, the move to containers brings with it a couple of new challenges. Operations.
The average OpenStack administrator no longer restarts services, they restart containers.
They no longer view a rabbit cluster’s status on the controller node, but rather within a container on the controller node. Log locations have changed. Config file locations have changed.
So let’s retrain ourselves.