Open Stack

Hi,
I wanted to know how a vm is created in openstack. There are so many
components of each service that I am getting confused. I understand at a
high level that nova-scheduler will find the compute host, nova-compute
will create the vm and nova interacts with neutron for port allocation. But
I want to know the complete picture of how various services of nova and
neutron are working together and who writes in the database, who puts the
messages in RabbitMQ. How can i understand at that level?

Thanks
Akshay
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