This warning and error occurs if you do not have the required sysfsutils package installed on the compute node. WARNING nova.virt.libvirt.utils [req-1200f887-c82b-4e7c-a891-fac2e3735dbb admin admin|req-1200f887-c82b-4e7c-a891-fac2e3735dbb admin admin] systool is not installed ERROR nova.compute.manager [req-1200f887-c82b-4e7c-a891-fac2e3735dbb admin admin|req-1200f887-c82b-4e7c-a891-fac2e3735dbb admin admin] [instance: df834b5a-8c3f-477a-be9b-47c97626555c|instance: df834b5a-8c3f-477a-be9b-47c97626555c] Failed to attach volume 13d5c633-903a-4764-a5a0-3336945b1db1 at /dev/vdk.

Run the following command on the compute node to install the sysfsutils packages. $ sudo apt-get install sysfsutils