[pve-devel] migration problems since qemu 1.3

[Alexandre DERUMIER]

with last git, I think it's related to balloon driver enabled by default, and qmp command send (see my previous mail).


can you try to replace (in QemuServer.pm)

        if (!defined($conf->{balloon}) || $conf->{balloon}) {
            vm_mon_cmd($vmid, "balloon", value => $conf->{balloon}*1024*1024)
                if $conf->{balloon};

            vm_mon_cmd($vmid, 'qom-set',
                       path => "machine/peripheral/balloon0",
                       property => "stats-polling-interval",
                       value => 2);
        }

by

        if (!defined($conf->{balloon}) || $conf->{balloon}) {
            vm_mon_cmd_nocheck($vmid, "balloon", value => $conf->{balloon}*1024*1024)
                if $conf->{balloon};

            vm_mon_cmd_nocheck($vmid, 'qom-set',
                       path => "machine/peripheral/balloon0",
                       property => "stats-polling-interval",
                       value => 2);
        }


(vm_mon_cmd_nocheck)

----- Mail original ----- 

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Jeudi 20 Décembre 2012 11:48:06 
Objet: Re: [pve-devel] migration problems since qemu 1.3 

Hi, 

Am 20.12.2012 10:04, schrieb Alexandre DERUMIER: 
>>> Yes. It works fine with NEWLY started VMs but if the VMs are running 
>>> more than 1-3 days. It stops working and the VMs just crahs during 
>>> migration. 
> Maybe vm running since 1-3 days,have more memory used, so I take more time to live migrate. 

I see totally different outputs - the vm crashes and the status output 
stops. 

with git from yesterday i'm just getting this: 
---------------------------------------------------------- 
Dec 20 11:34:21 starting migration of VM 100 to node 'cloud1-1203' 
(10.255.0.22) 
Dec 20 11:34:21 copying disk images 
Dec 20 11:34:21 starting VM 100 on remote node 'cloud1-1203' 
Dec 20 11:34:23 ERROR: online migrate failure - command '/usr/bin/ssh -o 
'BatchMode=yes' root at 10.255.0.22 qm start 100 --stateuri tcp --skiplock 
--migratedfrom cloud1-1202' failed: exit code 255 
Dec 20 11:34:23 aborting phase 2 - cleanup resources 
Dec 20 11:34:24 ERROR: migration finished with problems (duration 00:00:03) 
TASK ERROR: migration problems 
---------------------------------------------------------- 


> Does it crash at start of the migration ? or in the middle of the migration ? 

At the beginning mostly i see no more output after: 
migration listens on port 60000 


> what is your vm conf ? (memory size, storage ?) 
2GB mem, RBD / Ceph Storage 

Stefan