Bug 1032369
Summary: | can create live snapshot of passthrough device (iSCSI LUN or block device) | |||
---|---|---|---|---|
Product: | Red Hat Enterprise Linux 7 | Reporter: | Sibiao Luo <sluo> | |
Component: | qemu-kvm | Assignee: | Jeff Cody <jcody> | |
Status: | CLOSED WONTFIX | QA Contact: | Virtualization Bugs <virt-bugs> | |
Severity: | medium | Docs Contact: | ||
Priority: | medium | |||
Version: | 7.0 | CC: | acathrow, bcao, chayang, juzhang, michen, pbonzini, qzhang, shyu, virt-maint, xfu | |
Target Milestone: | rc | |||
Target Release: | --- | |||
Hardware: | Unspecified | |||
OS: | Unspecified | |||
Whiteboard: | ||||
Fixed In Version: | Doc Type: | Bug Fix | ||
Doc Text: | Story Points: | --- | ||
Clone Of: | ||||
: | 1032393 1034993 (view as bug list) | Environment: | ||
Last Closed: | 2014-06-11 18:43:56 UTC | Type: | Bug | |
Regression: | --- | Mount Type: | --- | |
Documentation: | --- | CRM: | ||
Verified Versions: | Category: | --- | ||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
Cloudforms Team: | --- | Target Upstream Version: | ||
Embargoed: | ||||
Bug Depends On: | ||||
Bug Blocks: | 1032393, 1034993, 1073368, 1131974 |
Description
Sibiao Luo
2013-11-20 03:55:37 UTC
"-snapshot/snapshot=on" are not supposed to work with iSCSI LUNs or scsi-block. The bug is actually that we can create a live snapshot of a passthrough device. If use libiscsi has not reproduced this issue. e.g:...-drive file=iscsi://10.66.6.82:3260/iqn.2013-11.com.example:storage.disk1.juli.xyz/2,if=none,id=drive-data-disk,readonly=on,snapshot=on,serial=sluo-disk -device virtio-blk-pci,bus=pci.0,addr=0x7,drive=drive-data-disk,id=data-disk -iscsi id=iqn-sluo (qemu) info block drive-data-disk: removable=0 io-status=ok file=/tmp/vl.9W69qb backing_file=iscsi://10.66.6.82:3260/iqn.2013-11.com.example:storage.disk1.juli.xyz/2 backing_file_depth=1 ro=0 drv=qcow2 encrypted=0 bps=0 bps_rd=0 bps_wr=0 iops=0 iops_rd=0 iops_wr=0 Best Regards, sluo You're not using a passthrough device (virtio-blk-pci). snapshot=on + libiscsi is a valid combination in general. It is snapshot=on + scsi-block that is invalid. From https://bugzilla.redhat.com/show_bug.cgi?id=1032393#c4 (RHEL6 clone): "Libvirt doesn't use -snapshot (or snapshot=on), so refusing to support it in qemu should have no impact on libvirt." Closing as WONTFIX in RHEL7 because we don't support direct usage of qemu-kvm |