Ability to rotational/non-rotational disks ("--ssd" option to "sesdev create") about sesdev HOT 3 CLOSED

The vagrant-libvirt documentation seems to indicate there is no way to specify "non-rotational":

https://github.com/vagrant-libvirt/vagrant-libvirt#additional-disks

👎

from sesdev.

Ah, but wait:

"In absence of information to the contrary, Linux guests assume that all block devices are backed by rotational storage. The guest OS admin can override this by setting the 'rotational' flag in sysfs."

node1:~ # ls /sys/block/vdb/queue/rotational
/sys/block/vdb/queue/rotational
node1:~ # cat /sys/block/vdb/queue/rotational
1
node1:~ # echo "0" > /sys/block/vdb/queue/rotational
node1:~ # cat /sys/block/vdb/queue/rotational
0

from sesdev.

The standard use case for a non-rotational disk would be for use as bluestore db/wal for the rotational disks on the node. So, we could add a --ssd parameter to sesdev create which would set the rotational flag for one of the additional disks (for all nodes that have such disks).

And, in a later iteration (via a different issue), the OSD deployment code could act differently in the presence of this --ssd option.

from sesdev.