Hello, I have a openstack deployed with kolla-ansible 2024.2. I'm trying to configure cinder and nova to use multipath when attaching volumes from the Hitachi SAN array. Without multipathing everything works good. When I enabled multipath in kolla-ansible (enable_multipathd: "yes"), deployment is without errors, volume can be created, but attachment of volume ends up with error in nova_compute container: ... 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] raise exc_type(*result[2]) 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] oslo_concurrency.processutils.ProcessExecutionError: Unexpected error while running command. 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] Command: multipath -C dm-0 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] Exit code: 1 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] Stdout: '' 2025-01-22 12:16:02.962 2 ERROR nova.virt.block_device [instance: 714bd6f8-49e5-406f-b608-b7aaded2e728] Stderr: '3601817.750747 | /etc/multipath.conf does not exist, blacklisting all devices.\n3601817.750753 | You can run "/sbin/mpathconf --enable" to create\n3601817.750754 | /etc/multipath.conf. See man mpathconf(8) for more details\n3601817.751393 | sdd: error 2 in pathinfo, discarding path\n3601817.751501 | sde: error 2 in pathinfo, discarding path\n3601817.751504 | 360060e8012b142005040b14200000ee2: removing empty pathgroup 0\n3601817.751505 | dm-0: no usable paths found\n' When I manually added /etc/multipath.conf to nova_compute container, the attachment passed without any issues. I do not want to build special image only because of that single config file. My question is, how to make kolla-ansible to copy/add /etc/multipath.conf file into nova_compute service? Is there any mechanism for that? Thanks. Kamil Madac