Like the last comment on the bug says, the message about block migration (drive
mirroring) indicates that nova is telling libvirt to copy the virtual disks,
which is not what should happen for ceph or other shared storage.
For ceph just plain live migration should be used, not block migration. It's
either a configuration issue or a bug in nova.
Josh
From: "Yuming Ma (yumima)" <yum...@cisco.com>
Sent: Apr 3, 2015 1:27 PM
To: ceph-users@lists.ceph.com
Subject: [ceph-users] live migration fails with image on ceph
Problem: live-migrating a VM, the migration will complete but cause a VM to
become unstable. The VM may become unreachable on the network, or go through a
cycle where it hangs for ~10 mins at a time. A hard-reboot is the only way to
resolve this.
Related libvirt logs:
2015-03-30 01:18:23.429+0000: 244411: warning :
qemuMigrationCancelDriveMirror:1383 : Unable to stop block job on
drive-virtio-disk0
2015-03-30 01:17:41.899+0000: 244408: warning :
qemuDomainObjEnterMonitorInternal:1175 : This thread seems to be the async job
owner; entering monitor without asking for a nested job is dangerous
Nova env:
Kernel : 3.11.0-26-generic
libvirt-bin : 1.1.1-0ubuntu11
ceph-common : 0.67.9-1precise
Ceph:
Kernel: 3.13.0-36-generic
ceph : 0.80.7-1precise
ceph-common : 0.80.7-1precise
Saw post here (https://bugs.dogfood.paddev.net/mos/+bug/1371130) that this
might have something to do the libvirt migration with RBD image, but exactly
how Ceph is related and how to resovle it if anyone had this before.
Thanks.
— Yuming
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