KVM Migrate

KVM Migrate

[Gilberto Nunes]

Hi all

I need some support here please!

I deploy two Dell Server, with Ubuntu 9.04, with KVM and I can not get
migration between this two machines....
I try with virsh, using 
migrate --live domain qemu +ssh://destdomain/system

but this not work properly... 

I try migrate via qemu console too, but is not work
I start tha KVM with this command line:
/usr/bin/kvm -M pc -cpu qemu32 -m 512 -smp 1 -name CentOS -uuid
8b8c6f61-7250-0386-1831-5bb2494a842b
-pidfile /var/run/libvirt/qemu//CentOS.pid -boot c -drive
file=/dev/etherd/e5.4,if=ide,index=0,boot=on -drive
file=,if=ide,media=cdrom,index=2 -net
nic,macaddr=54:52:00:41:b4:e8,vlan=0 -net
tap,fd=17,script=,vlan=0,ifname=vnet3 -serial none -parallel none -usb
-k pt-br

And on other host, I star KVM with this:

/usr/bin/kvm -M pc -cpu qemu32 -m 512 -smp 1 -name CentOS -uuid
8b8c6f61-7250-0386-1831-5bb2494a842b
-pidfile /var/run/libvirt/qemu//CentOS.pid -boot c -drive
file=/dev/etherd/e5.4,if=ide,index=0,boot=on -drive
file=,if=ide,media=cdrom,index=2 -net
nic,macaddr=54:52:00:41:b4:e8,vlan=0 -net
tap,fd=17,script=,vlan=0,ifname=vnet3 -serial none -parallel none -usb
-k pt-br -incoming tcp:0:4444

So, when o host A, I alter to KVM console (with ctrl+alt+2) and type
migrate -d tcp://IP:4444, the KVM console return migration failed. And
this all!!?!?!

Some help please!!??!


Gilberto Nunes Ferreira
TI
Selbetti Gestão de Documentos
Telefone: +55 (47) 3441-6004
Celular: +55 (47) 8861-6672

Re: KVM Migrate

[Charles Duffy]

This doesn't speak directly to your live migration issue -- but 
copy-and-pasting a libvirt-generated command line (as you're doing here) 
and using it by hand is perilous.

As I mentioned when you asked in the IRC channel, you shouldn't be using 
fd= here when starting kvm by hand -- it expects to be passed an open 
file descriptor to a tap device (on fd 17, in your examples), and since 
you almost certainly _don't_ have such a file descriptor in your shell, 
you're setting things up for failure; in prior versions (and maybe the 
current one as well), this resulted in endless looping on a select() 
call returning EBADF.