[libvirt] [PATCH 5/6] allow non-zero success values from a domain's MigratePerform
Paolo Bonzini
pbonzini at redhat.com
Wed Oct 7 13:09:17 UTC 2009
> Sounds fine by me, but I wonder about the change of semantic for
> client server not at the same version level. Could you explain what
> might happen in those case ?
Here is the result of my testing (source libvirtd is always new):
source virsh source method destination libvirtd result
-----------------------------------------------------------------------
old qemu:// old runs (bad)
old qemu:// new runs (bad)
old qemu+tcp:// old runs (bad)
old qemu+tcp:// new runs (bad)
new qemu:// old runs (bad)
new qemu:// new paused (ok)
new qemu+tcp:// old runs (bad)
new qemu+tcp:// new paused (ok)
So you do need not just a new daemon, but also a new virsh to fix the
bug. However, the good news is that in no case the migration fails,
even when using an old virsh and connecting to the daemon via a remote
connection.
Paolo
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