Bug 856864
| Summary: | Do live migration from rhel6.1.z release version to rhel6.4 newest version and back will get "error Unknown controller type 'usb'" | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | EricLee <bili> | ||||||||||
| Component: | libvirt | Assignee: | Ján Tomko <jtomko> | ||||||||||
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> | ||||||||||
| Severity: | medium | Docs Contact: | |||||||||||
| Priority: | medium | ||||||||||||
| Version: | 6.4 | CC: | acathrow, dallan, dyasny, dyuan, jdenemar, juzhang, laine, lsu, mzhan, rwu, weizhan, whuang, yupzhang, zhpeng | ||||||||||
| Target Milestone: | rc | ||||||||||||
| Target Release: | --- | ||||||||||||
| Hardware: | x86_64 | ||||||||||||
| OS: | Linux | ||||||||||||
| Whiteboard: | |||||||||||||
| Fixed In Version: | libvirt-0.10.2-5.el6 | Doc Type: | Bug Fix | ||||||||||
| Doc Text: |
Cause: Libvirt was putting the default USB controller into the XML when doing a v2 migration.
Consequence: Migration to RHEL 6.1 failed, because it doesn't understand USB controllers.
Fix: Don't include the default USB controller in XML while doing a v2 migration.
Result: Migration to RHEL 6.1. works.
|
Story Points: | --- | ||||||||||
| Clone Of: | Environment: | ||||||||||||
| Last Closed: | 2013-02-21 07:23:37 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: | 863059 | ||||||||||||
| Bug Blocks: | |||||||||||||
| Attachments: |
|
||||||||||||
Since Laine said he will track this bug, and let us to assign the bug to him in email, so I set the Assignee to Laine when I file this bug. Jirka - this seems to be complaining about the same problem as Bug 815503. Any ideas on why your patch for that doesn't seem to be working in this case? No idea, the fix was to avoid formatting any usb controller if there is just one default controller configured (which should be the case of 6.1.z->6.4->6.1.z migration). I guess someone must have either change that code or added something that effectively disabled the code. Anyway, this looks like a regression... I think 6.2(.z)->6.4->6.2(.z) should not work either, Eric, can you check that? The odd part is that, in a separate email prior to opening this bug, the reporter says that 6.2.z-->6.4-->6.2.z *does* work (and that 6.1.z-->6.3-->6.1.z also fails): > | From: "Laine Stump" <laine> > | > | Does it work properly when you migrate from > | RHEL6.2.z->RHEL6.4->RHEL6.2.z? What about > | RHEL6.1.z->RHEL6.3->RHEL6.1.z? > | > On 09/10/2012 10:04 PM, Bing Li wrote: > > I have tried: > RHEL6.2.z->RHEL6.4->RHEL6.2.z works well; > RHEL6.1.z->RHEL6.3->RHEL6.1.z also get the same error. Of course it would be good to get independent verification of this result, as it seems to defy logic :-) (In reply to comment #4) > No idea, the fix was to avoid formatting any usb controller if there is just > one default controller configured (which should be the case of > 6.1.z->6.4->6.1.z migration). I guess someone must have either change that > code or added something that effectively disabled the code. Anyway, this > looks like a regression... I think 6.2(.z)->6.4->6.2(.z) should not work > either, Eric, can you check that? I have tried that again, and the results are the same with comment #5 which I tested before opening this bug: RHEL6.2.z->RHEL6.4->RHEL6.2.z works well: 6.2.z host: libvirt-0.9.4-23.el6_2.9 qemu-kvm-0.12.1.2-2.209.el6_2.5 kernel-2.6.32-220.26.1.el6 6.4 host: libvirt-0.10.1-1.el6.x86_64 qemu-kvm-0.12.1.2-2.308.el6.x86_64 kernel-2.6.32-298.el6.x86_64 RHEL6.1.z->RHEL6.3->RHEL6.1.z also get the same error: "error: internal error Unknown controller type 'usb'": 6.1.z host: Kernel : kernel-2.6.32-131.32.1.el6 qemu-kvm : qemu-kvm-0.12.1.2-2.160.el6_1.9 libvirt: libvirt-0.8.7-18.el6_1.5 6.3 host: kernel-2.6.32-279.el6.x86_64 libvirt-0.9.10-21.el6.x86_64 qemu-kvm-0.12.1.2-2.295.el6.x86_64 That maybe indicate that the patch added for fixing Bug 815503 just works on RHEL6u2 and after 6u2 version, or the package in 6.1 have some different from 6.2 which make your patch do not work. Hmm, this is very puzzling indeed. We'll need to try ourselves while closely watching what the hack is going on with the domain when it is being migrated from pre-6.3 to post-6.3 and back. BTW, could you attach domain XMLs of the domains before you tried to migrate them, i.e., from 6.[12].z hosts? (In reply to comment #10) > Hmm, this is very puzzling indeed. We'll need to try ourselves while closely > watching what the hack is going on with the domain when it is being migrated > from pre-6.3 to post-6.3 and back. > > BTW, could you attach domain XMLs of the domains before you tried to migrate > them, i.e., from 6.[12].z hosts? Please see the following comments. comment #12: r6u1-before.xml which is used before migrating on 6.1.z host comment #13: r6u1-after.xml on 6.4 host which migrated from 6.1.z host Created attachment 613897 [details]
xml on 6.1.z host
Created attachment 613898 [details]
xml on 6.4 host
How about the pre-migration domain xml from the 6.2.z host (where migration does work)? (In reply to comment #14) > How about the pre-migration domain xml from the 6.2.z host (where migration > does work)? Please see comment #16 and comment #17. Created attachment 613913 [details]
xml on 6.2.z host
Created attachment 613915 [details]
xml on 6.4 host of r6u2 guest
RHEL-6.2 doesn't recognize USB controllers, but it supports v3 migration which got fixed by bug 815503. RHEL-6.1 only supports v2, where the XML is generated by domainGetXMLDesc, which always leaves the USB controller in, because it's the same function used by "virsh dumpxml". Upstream patch proposed: https://www.redhat.com/archives/libvir-list/2012-October/msg01059.html Clear for steps 1.Two hosts host1: 6.1.z libvirt-0.8.7-18.el6_1.5.x86_64 kernel-2.6.32-131.32.1.el6 qemu-kvm-0.12.1.2-2.160.el6_1.9 host2: 6.4 libvirt-0.10.2-5.el6.x86_64 qemu-kvm-0.12.1.2-2.317.el6.x86_64 kernel-2.6.32-330.el6.x86_64 2.Prepare nfs and configurate selinux rules on both two hosts for migration # setsebool virt_use_nfs 1 # iptables -F host1: $nfs-server on /mnt type nfs (rw,vers=3,addr=$nfsip) host2: $nfs-server on /mnt type nfs (rw,vers=3,addr=$nfsip) 3.start a guest in host1 to migrate to host2 and back. host1: #virsh dumpxml test | grep /mnt <source file='/mnt/tsu-1.img'/> #virsh migrate --live test qemu+ssh://$host2ip/system //success host2: #virsh migrate --live test qemu+ssh://$host1ip/system //success I reproduced the bug with libvirt-0.10.2-4.el6.x86_64 ,migration successed with libvirt-0.10.2-5.el6.x86_64. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHSA-2013-0276.html |
Description of problem: Do live migration from rhel6.1.z release version to rhel6.4 newest version and back will get "error Unknown controller type 'usb'" Version-Release number of selected component (if applicable): 6.1.z host: Kernel : kernel-2.6.32-131.32.1.el6 qemu-kvm : qemu-kvm-0.12.1.2-2.160.el6_1.9 libvirt: libvirt-0.8.7-18.el6_1.5 6.4 host: libvirt-0.10.1-1.el6.x86_64 qemu-kvm-0.12.1.2-2.308.el6.x86_64 kernel-2.6.32-298.el6.x86_64 How reproducible: 100% Steps to Reproduce: Setup: 1. Prepare 2 hosts, host 1 is rhel6.1.z release version, host 2 is newest rhel6.4 version Please update kernel , qemu-kvm and libvirt package to z-stream on rhel6.1.z host For now , Kernel : kernel-2.6.32-131.32.1.el6 qemu-kvm : qemu-kvm-0.12.1.2-2.160.el6_1.9 libvirt: libvirt-0.8.7-18.el6_1.5 How to find the newest z-stream package: Search kernel-2.6.32-131* , qemu-kvm-0.12.1.2-2.160.el6* and libvirt-0.8.7-18.el6* separately with Build option in brewweb. 2. Prepare a nfs which is mounted on both hosts, and setting the virt_use_nfs boolean on both sides # setsebool virt_use_nfs 1 and close the iptable on both sides # iptables -F Actions: 1. Prepare a guest locate on host 1(6.1.z) and start, check the qemu-kvm command the disk xml part should be ... <disk type='file' device='disk'> <driver name='qemu' type='raw' cache='none'/> <source dev='/$SHARED_DIR/kvm-rhel6u1-x86_64-new.img'/> <target dev='vda' bus='virtio'/> </disk> ... 2. Do live migration from host 1(6.1.z) to host 2(6.4) # virsh migrate --live guest qemu+ssh://{host 2 ip}/system 3. Login guest to check the guest status 4. Do live migration from host 2(6.4) to host 1(6.1.z) # virsh migrate --live guest qemu+ssh://{host 1 ip}/system Actual results: Step 4 will get "error Unknown controller type 'usb'" Expected results: Migration should succeed without error Additional info: The Bug 815503 migration of rhel6.2.0 guest from RHEL6.3 host to RHEL6.2 host fails "error Unknown controller type 'usb'" has closed as fixed.