Install and configure a compute node for Red Hat Enterprise Linux and CentOS in nova

[Ricardo Diaz Campos]

When configuring nova-compute in Xena, it is necessary to include in the documentation something like "In the [DEFAULT] section, configure the state_path option: state_path=/var/lib/nova". Otherwise, state_path is set to "/usr/lib/python3.6/site-packages/" and "ERROR nova.compute.manager FileNotFoundError: [Errno 2] No such file or directory: '/usr/lib/python3.6/site-packages/instances" can be seen in the log when starting the nova-compute service.

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-----------------------------------
Release: 24.0.1.dev10 on 2019-11-27 17:09:44
SHA: 6b108d92df0d776e6acb82dab1ff2f7f38f20073
Source: https://opendev.org/openstack/nova/src/doc/source/install/compute-install-rdo.rst
URL: https://docs.openstack.org/nova/xena/install/compute-install-rdo.html

[Phillip (phil1x)]

Just have been bitten by this bug. But before it, it was throwing an error about the compute driver:

ERROR nova.virt.driver [req-00c7fc03-5657-45ab-b656-e24002e6d52d - - - - -] Compute driver option required, but not specified

So, the driver has to set as well on [DEFAULT]:
compute_driver=libvirt.LibvirtDriver