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Installing Ubuntu OpenStack requires at least five machines with two disks, two of which have two network interfaces (NICs). Install Ubuntu Server on one of the machines with two interfaces.

Why do I need two disks? What if I have 5 machines with 2TB capacity each but on a single disk? Would this setup not work i:e http://www.ubuntu.com/download/cloud/install-ubuntu-openstack? Why do we need 2 interfaces on two machines? I understand for one machine, one interface connects to the internet and the second to the local network. But why do we need 2 interfaces for the second machine?

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Umair Chaudhry
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1 Answers1

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Multiple disks are required because the OpenStack configuration deployed by the Autopilot co-locates the Nova Compute service and Ceph on the same nodes. This results in one disk being used for system boot, and one being allocated to the Ceph OSD for data storage.

You get scale-out storage and scale-out compute in the bargain, but you need two disks.

You could substitute USB keys for the second drive... I would not call that "production" but it is a quick workaround for trying out things.

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