how to use python-guestfs to access rbd device? The function i found is g.add_drive_opts, but i dono know how it receive ceph's configuration. I found this link http://rwmj.wordpress.com/2013/03/12/accessing-ceph-rbd-sheepdog-etc-using-l... Is that the only way i should use to access ceph rbd? Can we use python-guestfs to get the same effect? Thanks
On Wed, Aug 06, 2014 at 04:17:24PM +0800, Li Tianqing wrote:
how to use python-guestfs to access rbd device? The function i found is g.add_drive_opts, but i dono know how it receive ceph's configuration.
I found this link http://rwmj.wordpress.com/2013/03/12/accessing-ceph-rbd-sheepdog-etc-using-l...
Ignore this link, it's very old and describes a hack which is no longer needed. Libguestfs now properly supports accessing many remote drives, without needing hacks.
Is that the only way i should use to access ceph rbd? Can we use python-guestfs to get the same effect?
Yes, you can use python-guestfs to access rbd. You need to do something like the code below. My Ceph server is switched off at the moment and I'm about to go to a conference, so I didn't have time to test this, but something like this should work. Make sure you have a recent version of libguestfs. At least >= 1.26. ---------------------------------------------------------------------- import guestfs g = guestfs.GuestFS (python_return_dict=True) g.set_verbose (1) g.set_trace (1) g.add_drive_opts ("pool/image", format="raw", readonly=1, protocol="rbd", server=[ "192.168.0.10:1234", "192.168.0.11:1235" ], # username="rbd_user_name", # secret="base64_encoded_password", ) g.launch () # etc. ---------------------------------------------------------------------- Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html
At 2014-08-06 04:31:09, "Richard W.M. Jones" <rjones@redhat.com> wrote:
On Wed, Aug 06, 2014 at 04:17:24PM +0800, Li Tianqing wrote:
how to use python-guestfs to access rbd device? The function i found is g.add_drive_opts, but i dono know how it receive ceph's configuration.
I found this link http://rwmj.wordpress.com/2013/03/12/accessing-ceph-rbd-sheepdog-etc-using-l...
Ignore this link, it's very old and describes a hack which is no longer needed. Libguestfs now properly supports accessing many remote drives, without needing hacks.
Is that the only way i should use to access ceph rbd? Can we use python-guestfs to get the same effect?
Yes, you can use python-guestfs to access rbd.
You need to do something like the code below.
My Ceph server is switched off at the moment and I'm about to go to a conference, so I didn't have time to test this, but something like this should work.
Make sure you have a recent version of libguestfs. At least >= 1.26.
Thanks a lot . I will try.
----------------------------------------------------------------------
import guestfs
g = guestfs.GuestFS (python_return_dict=True)
g.set_verbose (1) g.set_trace (1)
g.add_drive_opts ("pool/image", format="raw", readonly=1, protocol="rbd", server=[ "192.168.0.10:1234", "192.168.0.11:1235" ], # username="rbd_user_name", # secret="base64_encoded_password", )
g.launch ()
# etc.
----------------------------------------------------------------------
Rich.
-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html
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