I'd expect that the target still owns the exclusive lock in this case. On Mon, May 22, 2017 at 10:43 AM, Lijie <li.jieA@xxxxxxx> wrote: > I have shut-down the VM, but rollback doesn't work fine. > The concrete commands are as below: > > Target: > 1. rbd create qos1 --size 10240 --image-features 12 (objectmap+exclusive-lock) > 2. tgtadm --lld iscsi --mode target --op new --tid 1 --targetname qos1 > 3. tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 --backing-store rbd/qos1 --bstype rbd -d > 4. tgtadm --lld iscsi --mode target --op bind --tid 1 -I ALL > 5. rbd snap create --image qos1 --snap snap_1 > > Initiator: > 1. iscsiadm -m discovery -t sendtargets -p 192.168.72.42 --login > 2.lsblk (adding device sdn representing rbd with exclusive-lock enabled ) > 3. mkfs.ext4 /dev/sdn > 4. iscsiadm -m discovery -t sendtargets -p 192.168.72.42 --logout (means shut-down) > > Target: > rbd snap rollback --image qos1 --snap snap_1 > > it returns failed,showing "Rolling back to snapshot: 0% complete...failed rbd: rollback failed: (30) Read-only file system" > > But if I don't execute creating ext4 filesystem,snap can rollback with exclusive-lock enabled successfully . > > So can u explain it? > > -----邮件原件----- > 发件人: Jason Dillaman [mailto:jdillama@xxxxxxxxxx] > 发送时间: 2017年5月22日 19:46 > 收件人: lijie 11803 (RD) > 抄送: Sage Weil; ceph-users@xxxxxxxxxxxxxx > 主题: Re: Snap rollback failed with exclusive-lock enabled > > That's by design -- it doesn't make sense to live-rollback a block device when you have a running VM actively accessing the device. Once you shut-down the VM, rollback should work just fine. > > On Mon, May 22, 2017 at 5:29 AM, Lijie <li.jieA@xxxxxxx> wrote: >> Hi All, >> >> When I do a snap rollback command with exclusive-lock enabled, it >> returns failure . >> >> The error message is “Rolling back to snapshot: 0% complete...failed.rbd: >> rollback failed: (30) Read-only file system”. >> >> And the log is “ms_dispatch 0x37df0c0 osd_op_reply(12 >> rbd_header.5e2b6b8b4567 [call] v0'0 uv0 ondisk = -16 ((16) Device or >> resource busy))” >> >> >> >> But if I disable the exclusive-lock feature, snap rollbacks successfully. >> >> >> >> So Iam wondering whether the exclusive-lock and rollback are in >> conflict .Or maybe there exists defect ? >> >> >> >> Looking forward to your reply . >> >> >> >> Best gards >> >> >> >> Thanks >> >> >> >> ---------------------------------------------------------------------- >> --------------------------------------------------------------- >> 本邮件及其附件含有新华三技术有限公司的保密信息，仅限于发送给上面地址中列出 >> 的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、 >> 或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本 >> 邮件！ >> This e-mail and its attachments contain confidential information from >> New H3C, which is intended only for the person or entity whose address >> is listed above. Any use of the information contained herein in any >> way (including, but not limited to, total or partial disclosure, >> reproduction, or dissemination) by persons other than the intended >> recipient(s) is prohibited. If you receive this e-mail in error, >> please notify the sender by phone or email immediately and delete it! >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > > > > -- > Jason -- Jason _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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