tree bffb2e7fb844bdd32d5716a8e14ea087ed3a0458
parent 218c2f258fcb836ab0d173d07cffa6cc7881e31b
author Lee Yarwood <lyarwood@redhat.com> 1613396075 +0000
committer Lee Yarwood <lyarwood@redhat.com> 1615290928 +0000

compute: Add [compute-feature-enabled]ide_bus flag

This change adds a specific flag to allow environments to indicate that
they do not support an IDE bus being used to attach devices to an
instance.

This is required as Nova's libvirt driver is looking to default to the
newer QEMU machine types such as ``q35`` in the future [1]. These newer
machine types have dropped support for the IDE bus in favour of the more
modern SATA, SCSI and VirtIO buses. As such in the longer term it cannot
be assumed that the IDE bus will always be available and in the short
term we need a way to indicate that an environment doesn't support IDE
when it's using the ``q35`` machine type.

For now the flag defaults to True but will need to move to False if Nova
ever defaults to the ``q35`` machine type.

[1] https://specs.openstack.org/openstack/nova-specs/specs/wallaby/approved/libvirt-stash-instance-machine-type.html

Change-Id: I40824fc3c88f16050407e52a790dd162f1f67e3a