By natively, I take it using
kernel /vmlinuz (vs kernel /xen)
Not yet, but working on setting up such an environment.
(At this time, I was using virt-install to reproduce the problem, and
the original server we are testing on did not support kvm but the 2nd
server does).
On 2016-04-12 03:26 AM, George Dunlap wrote:
On Mon, Apr 11, 2016 at 9:14 PM, Nathan Coulson <nathan@xxxxxxxxxxxx> wrote:
Hello
We were attempting to use scsi-target-utils, hosted on a xen dom0 vm using
localhost, and running into some problems. I was not able to reproduce this
on a centos 7.2 server using the default kernel.
Have you tried booting the Virt SIG kernel natively and seeing if you
can reproduce the problem at all?
Thanks,
-George
(From dmesg)
Apr 4 11:18:42 funk kernel: [ 596.511204] connection2:0: detected conn
error (1022)
Apr 4 11:18:42 funk kernel: connection2:0: ping timeout of 5 secs expired,
recv timeout 5, last rx 4295253788, last ping 4295258790, now 4295263808
Apr 4 11:18:42 funk kernel: connection2:0: detected conn error (1022)
Apr 4 11:18:42 funk iscsid: Kernel reported iSCSI connection 2:0 error
(1022 - Invalid or unknown error code) state (3)
Apr 4 11:18:44 funk iscsid: connection2:0 is operational after recovery (1
attempts)
Repeated a few times, until eventually
Apr 4 11:19:44 funk kernel: Result: hostbyte=DID_TRANSPORT_DISRUPTED
driverbyte=DRIVER_OK
Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd] CDB:
Apr 4 11:19:44 funk kernel: Write(10): 2a 00 01 df c7 e8 00 00 18 00
Apr 4 11:19:44 funk kernel: blk_update_request: I/O error, dev sdd, sector
31442920
Apr 4 11:19:44 funk kernel: [ 658.127596] sd 7:0:0:1: [sdd]
Apr 4 11:19:44 funk kernel: [ 658.127688] Result:
hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK
Apr 4 11:19:44 funk kernel: [ 658.127761] sd 7:0:0:1: [sdd] CDB:
Apr 4 11:19:44 funk kernel: [ 658.127826] Write(10): 2a 00 01 df c7 e8 00
00 18 00
Apr 4 11:19:44 funk kernel: [ 658.127927] blk_update_request: I/O error,
dev sdd, sector 31442920
Apr 4 11:19:44 funk kernel: [ 658.128040] sd 7:0:0:1: [sdd]
Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd]
Apr 4 11:19:44 funk kernel: [ 658.128105] Result:
hostbyte=DID_TRANSPORT_DISRUPTED driverbyte=DRIVER_OK
Apr 4 11:19:44 funk kernel: [ 658.128177] sd 7:0:0:1: [sdd] CDB:
Apr 4 11:19:44 funk kernel: [ 658.128241] Write(10): 2a 00 00 00 08 00 00
00 18 00
Apr 4 11:19:44 funk kernel: [ 658.128339] blk_update_request: I/O error,
dev sdd, sector 2048
Apr 4 11:19:44 funk kernel: Result: hostbyte=DID_TRANSPORT_DISRUPTED
driverbyte=DRIVER_OK
Apr 4 11:19:44 funk kernel: sd 7:0:0:1: [sdd] CDB:
Apr 4 11:19:44 funk kernel: Write(10): 2a 00 00 00 08 00 00 00 18 00
Apr 4 11:19:44 funk kernel: blk_update_request: I/O error, dev sdd, sector
2048
(Test Setup)
scsi-target-utils installed via yum, default config
/etc/tgt/conf.d/xenguests.conf
<target iqn.2016-02.com.bravenet:test>
backing-store //mnt/vmdisk/test # vm image
</target>
systemctl tgtd restart
iscsiadm -m discovery -t sendtargets -p localhost
iscsiadm -m node -T iqn.2016-02.com.bravenet:test -l
add it to lvm (pvcreate, vgcreate), let's call it /dev/vmdisk.vg/test.lv
and then use libvirt to attempt to install an os on /dev/vmdisk.vg/test.lv
(using anaconda)
Around the time it tries to create the disk label, is when the conn errors
start, until eventually it gives up trying to create the disk label.
We tested a similar setup on a centos 7.2 host we use kvm based
virtualmachine hosting on (default 3.10 kernel), and it worked fine. It may
be similar to what was reported on
https://bugzilla.redhat.com/show_bug.cgi?id=1245990, but I never saw a
resolution on what they discovered (other then a reference to comment18
which does not appear to exist).
Testing over the network appears to also work as well (where another machine
connects to scsi-target-utils on the funk server above.
Longterm Purpose of the above setup, was to get direct access to a
filesystem image hosted on a gluster setup, using bs-type glfs on
scsi-target-utils.
--
Nathan Coulson
www.bravenet.com
nathan@xxxxxxxxxxxx
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https://lists.centos.org/mailman/listinfo/centos-virt
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https://lists.centos.org/mailman/listinfo/centos-virt
--
Nathan Coulson
System Administrator for Bravenet
www.bravenet.com
nathan@xxxxxxxxxxxx
_______________________________________________
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