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What's wrong with Packstack?

You can use the installation tutorial on the documentation web site. It offers a minimal deployment using Nova for machine management, Neutron for networking, Glance for VM images and Keystone for identity management.

With this tutorial, Glance stores images on the controller's filesystem. For more robust storage, you could also deploy Swift or Ceph (the latter is not covered by the tutorial), but this is probably overkill for a two-node installation.

Is a single compute node sufficient for 10 VMs? This depends on the demands of those machines and the performance of the compute node. A typical server should have no problems with ten typical VMs.

If all you want is managing VMs with a simple network between them, you may be happy with a less complex solution than OpenStack, such as Proxmox or Ovirt, or even virt-manager.