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You want to install OpenStack on a 2GB VM? I would not think this is possible at all. In my experience, 8GB is barely sufficient for an all-in-one installation if you only deploy the absolute minimum: Keystone, Nova, Neutron, Glance. If you add Swift, Cinder, Heat, I recommend 10-12 GB.

20GB is probably not enough either. Give it 50.

You want to install OpenStack on a 2GB VM? I would not think this is possible at all. In my experience, 8GB is barely sufficient for an all-in-one installation if you only deploy the absolute minimum: Keystone, Nova, Neutron, Glance. If you add Swift, Cinder, Heat, I recommend 10-12 GB.

20GB is probably not enough either. Give it 50.

The recommended sizes for multi-node installations are documented at https://docs.openstack.org/install-guide/overview.html#example-architecture. However I am certain you can survive with smaller systems.

You want to install OpenStack on a 2GB VM? I would not think this is possible at all. In my experience, 8GB is barely sufficient for an all-in-one installation if you only deploy the absolute minimum: Keystone, Nova, Neutron, Glance. If you add Swift, Cinder, Heat, I recommend 10-12 GB.

20GB is probably not enough either. Give it 50.

The recommended sizes for multi-node test installations are documented at https://docs.openstack.org/install-guide/overview.html#example-architecture. However I am certain you can survive with smaller systems.