Re: [Users] oVirt 3.2 - Migration failed due to error: migrateerr

> Date: Mon, 29 Jul 2013 09:56:30 +0200 > From: mkletzan(a)redhat.com > To: danken(a)redhat.com > CC: cybertimber2000(a)hotmail.com; users(a)ovirt.org > Subject: Re: [Users] oVirt 3.2 - Migration failed due to error: migrateerr > > On 07/27/2013 09:50 PM, Dan Kenigsberg wrote: >> On Fri, Jul 26, 2013 at 02:03:28PM -0400, Nicholas Kesick wrote: >>>> Date: Fri, 26 Jul 2013 05:52:44 +0300 >>>> From: iheim(a)redhat.com >>>> To: cybertimber2000(a)hotmail.com >>>> CC: danken(a)redhat.com; users(a)ovirt.org >>>> Subject: Re: [Users] oVirt 3.2 - Migration failed due to error: migrateerr >>>> >>>> On 07/26/2013 05:40 AM, Nicholas Kesick wrote: >>>>> >>>>> Replies inline. >>>>> > Date: Thu, 25 Jul 2013 22:27:17 +0300 >>>>> > From: danken(a)redhat.com >>>>> > To: cybertimber2000(a)hotmail.com >>>>> > CC: users(a)ovirt.org >>>>> > Subject: Re: [Users] oVirt 3.2 - Migration failed due to error: >>>>> migrateerr >>>>> > >>>>> > On Thu, Jul 25, 2013 at 11:54:40AM -0400, Nicholas Kesick wrote: >>>>> > > When I try to migrate a VM, any VM, between my two hosts, I receive >>>>> an error that says Migration failed due to error: migrateerr. Looking in >>>>> the log I don't see any thing that jumps out other than the final message >>>>> > > >>>>> > > VDSGenericException: VDSErrorException: Failed to MigrateStatusVDS, >>>>> error = Fatal error during migration >>>>> > > >>>>> > > Ovirt-engine is version 3.2.2-1.1.fc18.noarch, firewalld is >>>>> disabled, and selinux is permissive. >>>>> > >>>>> > Please do not say this in public, you're hurting Dan Walsh's feelings ;-) >>>>> > >>>>> I recall seeing his blog posts, and I agree. Not sure when I set it to >>>>> permissive... maybe to get the 3.2 install w/ Firewalld setup to >>>>> complete? I remember that was fixed in 3.2.1. I'll set it back to enforcing. >>>>> > > >>>>> > > ovirt-node version is 2.6.1 on both hosts. >>>>> > > >>>>> > > Any suggestions would be welcome! >>>>> > > >>>>> > >>>>> > I'd love to see /etc/vdsm/vdsm.log from source and destination. The >>>>> > intersting parts start with vmMigrate at the source and with >>>>> > vmMigrationCreate at the destination. >>>>> Hmm, I probably should have pulled that sooner. So, I cleared the active >>>>> VDSM (while nothing was running) and libvirtd.log, booted one vm, and >>>>> tried to migrate it. Attached are the logs. It looks like it boils down >>>>> to (from the source): >>>>> Traceback (most recent call last): >>>>> File "/usr/share/vdsm/vm.py", line 271, in run >>>>> File "/usr/share/vdsm/libvirtvm.py", line 505, in >>>>> _startUnderlyingMigration >>>>> File "/usr/share/vdsm/libvirtvm.py", line 541, in f >>>>> File "/usr/lib64/python2.7/site-packages/vdsm/libvirtconnection.py", >>>>> line 111, in wrapper >>>>> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1178, in >>>>> migrateToURI2 >>>>> libvirtError: internal error Attempt to migrate guest to the same host >>>>> localhost >>>>> Does this mean my UUIDs are the same? >>>>> http://vaunaspada.babel.it/blog/?p=613 >>>>> As far as the destination, I'm really not understanding what's going on >>>>> on the destination between "Destination VM creation succeeded" and >>>>> ":destroy Called" that would lead to it failing, except for what's after >>>>> the traceback: >>>>> Traceback (most recent call last): >>>>> File "/usr/share/vdsm/vm.py", line 696, in _startUnderlyingVm >>>>> File "/usr/share/vdsm/libvirtvm.py", line 1907, in >>>>> _waitForIncomingMigrationFinish >>>>> File "/usr/lib64/python2.7/site-packages/vdsm/libvirtconnection.py", >>>>> line 111, in wrapper >>>>> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 2822, in >>>>> lookupByUUIDString >>>>> libvirtError: Domain not found: no domain with matching uuid >>>>> '50171e1b-cf21-41d8-80f3-88ab1b980091' >>>>> But that is the ID of the VM by the looks of it. >>>>> Sorry Itamar, nothing was written to libvirtd.log after I cleared it. >> >> It could be that libvirtd is still writing to the files that you removed >> from the filesystem. To make sure libvirtd writes to your new file, >> restart the service. There may be clues there on why libvirt thinks that >> the source and destination are one and the same. >> > > When clearing the logs, it should be enough to do '> > /path/to/libvirtd.log' (in bash). > Just checked and it seems some things were logged in there during my testing on Friday. I'll attach those. >>>> >>>> Thread-800::ERROR::2013-07-26 01:57:16,198::vm::198::vm.Vm::(_recover) >>>> vmId=`50171e1b-cf21-41d8-80f3-88ab1b980091`::internal error Attempt to >>>> migrate guest to the same host localhost >>>> Thread-800::ERROR::2013-07-26 01:57:16,377::vm::286::vm.Vm::(run) >>>> vmId=`50171e1b-cf21-41d8-80f3-88ab1b980091`::Failed to migrate >>>> Traceback (most recent call last): >>>> File "/usr/share/vdsm/vm.py", line 271, in run >>>> File "/usr/share/vdsm/libvirtvm.py", line 505, in >>>> _startUnderlyingMigration >>>> File "/usr/share/vdsm/libvirtvm.py", line 541, in f >>>> File "/usr/lib64/python2.7/site-packages/vdsm/libvirtconnection.py", >>>> line 111, in wrapper >>>> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1178, in >>>> migrateToURI2 >>>> libvirtError: internal error Attempt to migrate guest to the same host >>>> localhost >>>> >>>> what are your hostnames? >>> >>> "host001" on 192.168.0.103 and "host002" on 192.168.0.104 >>> Even tried changing it, no luck. >>> > > Are they resolving properly on those hosts? Is there a DNS or > /etc/hosts entry related to this? > There are /etc/hosts entries on both hosts to each other, and a "ping host001" "ping host002" resolves correctly.I do however note that the terminal session says root@localhost. I wonder if running hostnamectl set-hostname {name} will fix anything. ...and after running hostnamectl set-hostname {name}, migrations are working! I think maybe I found a bug:With the node in maintenance mode, from the oVirt Node (SSH or local) if you go to Network, change the hostname ({newname}), and then go down to the configured System NIC and press enter, it says it is Setting Hostname. Now, if you press F2, the terminal will show root@{newname}. If you reboot however, under network it will say {newname}, but pressing F2 for the terminal will show root@localhost. If it's localhost, it won't migrate.So, it looks like the hostname isn't getting written persistantly. Even a hostnamectl set-hostname {name} gets lost on reboot. Or am I doing something wrong? >>> Could it be because the oVirt Node - Network tab - does not have any DNS servers specified? >> >> I do not think so. We do not see "name resolution" errors, or name >> resolutions at all. >> >> What does libvirt (src + dst) say about >> >> virsh -r capabilities|grep uuid >> >> ? If uuids happen to be the same, you get the bug that you are >> reporting. >> host 001:virsh -r capabilities|grep uuid <uuid>a4dc7de7-e2d3-45f5-b75a-7101f71d2b17</uuid> host002: virsh -r capabilities|grep uuid <uuid>ce66bb7f-fbbb-432b-9f62-5bcf5cb732e4</uuid> > > Although, as Dan says, having the same UUID for both hosts will report > the same error even when hostnames are different. > > Do you have an UUID set in your libvirtd.conf? What do you have in the > following files (if they exist) on both hosts? > > /sys/devices/virtual/dmi/id/product_uuidhost001:cat /sys/devices/virtual/dmi/id/product_uuid 44454C4C-3700-1047-8048-C3C04F4C4631 host002:cat /sys/devices/virtual/dmi/id/product_uuid 44454C4C-5900-1054-8034-B3C04F4E4631 Those match what I see on the webadmin under hosts > hostname > hardware information > /sys/class/dmi/id/product_uuidhost001:cat /sys/class/dmi/id/product_uuid 44454C4C-3700-1047-8048-C3C04F4C4631 host002: cat /sys/class/dmi/id/product_uuid 44454C4C-5900-1054-8034-B3C04F4E4631