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 _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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