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Description of problem: migration with --dname will fail with error # virsh migrate --live kvm-rhel6-x86_64 qemu+ssh://10.66.83.178/system --dname kvm-rhel6-x86_64-new error: internal error Incoming cookie data had unexpected name kvm-rhel6-x86_64 vs kvm-rhel6-x86_64-new And on target host, it has a transient domain which named kvm-rhel6-x86_64-new transient domain in shut off status. it can succeed on rhel6.1 libvirt-0.8.7.18, so it is a regression bug Version-Release number of selected component (if applicable): kernel-2.6.32-197.el6.x86_64 qemu-kvm-0.12.1.2-2.192.el6.x86_64 libvirt-0.9.4-12.el6.x86_64 How reproducible: 100% Steps to Reproduce: 1. Prepare 2 hosts and 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 2. Do migration # virsh migrate --live kvm-rhel6-x86_64 qemu+ssh://10.66.83.178/system --dname kvm-rhel6-x86_64-new Actual results: error:internal error Incoming cookie data had unexpected name kvm-rhel6-x86_64 vs kvm-rhel6-x86_64-new Expected results: succeed with no error Additional info:
Oh, migration cookie handling was enhanced in a way that is incompatible with dname. We send domain name as part of migration cookie and check that the name matches when parsing the cookie. However, source libvirtd sends old name in the cookie and destination libvirtd expects to see the new name there because it is always taken from the domain object. Fixing this would require explicitly passing name of the domain to functions that handle migration cookies.
This is fixed upstream by commit cdd5ef7b0776c5fa09a1b5bcb5d8adbc82b525bd Author: Jiri Denemark <jdenemar> Date: Tue Oct 4 09:11:35 2011 +0200 qemu: Fix migration with dname Destination libvirtd remembers the original name in the prepare phase and clears it in the finish phase. The original name is used when comparing domain name in migration cookie.
Patch sent for internal review: http://post-office.corp.redhat.com/archives/rhvirt-patches/2011-October/msg00149.html
verify pass on libvirt-0.9.4-16.el6.x86_64 kernel-2.6.32-206.el6.x86_64 qemu-kvm-0.12.1.2-2.195.el6.x86_64 with --dname, there is no error on migration.
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/RHBA-2011-1513.html