From mboxrd@z Thu Jan 1 00:00:00 1970 From: Loic Dachary Subject: Re: krbd & live resize Date: Tue, 30 Jul 2013 13:01:15 +0200 Message-ID: <51F79CFB.7020207@dachary.org> References: <51F6E389.1040607@dachary.org> <51F78D74.803@ksperis.com> <51F78E0B.4030106@dachary.org> <51F7905C.6050604@ksperis.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigF9524AC0BA12535955833DAB" Return-path: Received: from smtp.dmail.dachary.org ([86.65.39.20]:34045 "EHLO smtp.dmail.dachary.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751194Ab3G3LBS (ORCPT ); Tue, 30 Jul 2013 07:01:18 -0400 In-Reply-To: <51F7905C.6050604@ksperis.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Laurent Barbe Cc: Ceph Development This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF9524AC0BA12535955833DAB Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Laurent, Thanks for the solution ! On 30/07/2013 12:07, Laurent Barbe wrote: > Live resize has been added in 3.6.10 for krbd client. >=20 > There is a need to do revalidate_disk() on rbd resize : > https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/co= mmit/?id=3Dd98df63ea7e87d5df4dce0cece0210e2a777ac00 >=20 > Cheers >=20 > Laurent >=20 >=20 > Le 30/07/2013 11:57, Loic Dachary a =E9crit : >> >> >> On 30/07/2013 11:55, Laurent Barbe wrote: >>> Hello Loic, >>> >>> which version of kernel do you use for krbd ? >> >> Linux i-csnces-0000 3.2.0-41-generic #66-Ubuntu SMP >> >> That may explain a few things ... :-) >> >>> >>> Laurent >>> >>> >>> Le 29/07/2013 23:50, Loic Dachary a =E9crit : >>>> Hi, >>>> >>>> This works: >>>> >>>> lvcreate --name tmp --size 10G all >>>> Logical volume "tmp" created >>>> mkfs.ext4 /dev/all/tmp >>>> mount /dev/all/tmp /mnt >>>> blockdev --getsize64 /dev/all/tmp >>>> 10737418240 >>>> lvextend -L+1G /dev/all/tmp >>>> Extending logical volume tmp to 11,00 GiB >>>> Logical volume tmp successfully resized >>>> blockdev --getsize64 /dev/all/tmp >>>> 11811160064 >>>> resize2fs /dev/all/tmp >>>> resize2fs 1.41.12 (17-May-2010) >>>> Filesystem at /dev/all/tmp is mounted on /mnt; on-line resizing requ= ired >>>> old desc_blocks =3D 1, new_desc_blocks =3D 1 >>>> Performing an on-line resize of /dev/all/tmp to 2883584 (4k) blocks.= >>>> The filesystem on /dev/all/tmp is now 2883584 blocks long. >>>> >>>> This does not work: >>>> >>>> rbd create --size 10240 tmp >>>> rbd info tmp >>>> rbd image 'tmp': >>>> size 10240 MB in 2560 objects >>>> order 22 (4096 KB objects) >>>> block_name_prefix: rb.0.12dd.238e1f29 >>>> format: 1 >>>> rbd map tmp >>>> mkfs.ext4 /dev/rbd1 >>>> mount /dev/rbd1 /mnt >>>> blockdev --getsize64 /dev/rbd1 >>>> 10737418240 >>>> rbd resize --size 20000 tmp >>>> blockdev --getsize64 /dev/rbd1 >>>> 10737418240 >>>> resize2fs /dev/rbd1 >>>> resize2fs 1.42 (29-Nov-2011) >>>> The filesystem is already 2621440 blocks long. Nothing to do! >>>> >>>> It does work after umounting: >>>> >>>> umount /mnt >>>> blockdev --getsize64 /dev/rbd1 >>>> fsck -f /dev/rbd1 >>>> resize2fs /dev/rbd1 >>>> resize2fs 1.42 (29-Nov-2011) >>>> Resizing the filesystem on /dev/rbd1 to 5120000 (4k) blocks. >>>> The filesystem on /dev/rbd1 is now 5120000 blocks long. >>>> >>>> I assume there should be "something" in KRBD to allow for the same b= ehavior as with LVM but I don't know enough about the kernel to be more s= pecific. Maybe something similar to ioctl BLKRRPART ? >>>> >>>> Cheers >>>> >>> --=20 >>> To unsubscribe from this list: send the line "unsubscribe ceph-devel"= in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> --=20 Lo=EFc Dachary, Artisan Logiciel Libre All that is necessary for the triumph of evil is that good people do noth= ing. --------------enigF9524AC0BA12535955833DAB Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlH3nPsACgkQ8dLMyEl6F22MHgCgpEAHJt7ybJZmghqEbkbsU5I6 37gAnihPcXtZTv9Fyo8OXbXZq9Fx/nYm =w7x8 -----END PGP SIGNATURE----- --------------enigF9524AC0BA12535955833DAB--