rbd-nbd – map rbd images to nbd device

rbd-nbd – map rbd images to nbd device

Synopsis

rbd-nbd [-c conf] [–read-only] [–device nbd device] [–nbdsmax _limit] [–maxpart _limit] [–exclusive] [–timeout seconds] map image-spec | snap-spec

rbd-nbd unmap nbd device

rbd-nbd list-mapped

Description

rbd-nbd is a client for RADOS block device (rbd) images like rbd kernel module.It will map a rbd image to a nbd (Network Block Device) device, allowing access itas regular local block device.

Options

-c ceph.conf
Use ceph.conf configuration file instead of the default/etc/ceph/ceph.conf to determine monitor addresses during startup.

—read-only
Map read-only.

—nbds_max limit
Override the parameter of NBD kernel module when modprobe, used tolimit the count of nbd device.

—max_part limit
Override for module param nbds_max.

—exclusive
Forbid writes by other clients.

—timeout seconds
Override device timeout. Linux kernel will default to a 30 second request timeout.Allow the user to optionally specify an alternate timeout.

Image and snap specs

image-spec is [pool-name]/image-name

snap-spec is [pool-name]/image-name@snap-name

The default for pool-name is “rbd”. If an image name contains a slashcharacter (‘/’), pool-name is required.

Availability

rbd-nbd is part of Ceph, a massively scalable, open-source, distributed storage system. Please refer tothe Ceph documentation at http://ceph.com/docs for more information.