volume access I/O error with libvirt-xen and iscsi

Bug #1445443 reported by Anthony PERARD on 2015-04-17
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OpenStack Compute (nova)
Medium
Unassigned

Bug Description

On a single-node devstack installation, on Ubuntu LTS 14.4, with the Xen hypervisor.

To reproduce:
nova volume-create --image-id cirros-0.3.2-x86_64-uec --display-name vol-cirros 1
nova boot --key-name `hostname` --block-device source=volume,id=$volume_id,dest=volume,bootindex=0,shutdown=preserve --image '' --flavor 42 cirros

The instance cirros does not finish to boot, and `nova console-log cirros` shows "I/O error" while accessing the block device.

console-log:
info: copying initramfs to /dev/xvda
[ 79.327661] end_request: I/O error, dev xvda, sector 2
[ 79.327678] Buffer I/O error on device xvda, logical block 1
[ 79.327686] lost page write due to I/O error on xvda
[ 79.327728] EXT3-fs (xvda): I/O error while writing superblock
[ 160.463559] end_request: I/O error, dev xvda, sector 25154
[...]

Another way to reproduce would be to use `nova volume-attach` instead of the --block-device option of nova boot.

Fix proposed to branch: master
Review: https://review.openstack.org/177311

Changed in nova:
assignee: nobody → Anthony PERARD (anthony-perard)
status: New → In Progress
summary: - volume access I/O error with libvirt-xen and lvmdriver-1
+ volume access I/O error with libvirt-xen and iscsi

Change abandoned by Anthony PERARD (<email address hidden>) on branch: master
Review: https://review.openstack.org/177311
Reason: This is only an issue if the volume and the instance are on the same host. The bug that this patch tries to workaround is been fixed in Linux 4.0.

Bob Ball (bob-ball) on 2015-06-17
Changed in nova:
importance: Undecided → Medium
Changed in nova:
assignee: Anthony PERARD (anthony-perard) → nobody
status: In Progress → Confirmed
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