[PVE-User] Massive live migrations

[Alexandre DERUMIER]

Hi, 
I have send some patches last week to pve-devel mailing to do simple mass live migrate from one node to another node.

It's not yet added to proxmox git.


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

De: "Gilles Mocellin" <gilles.mocellin at nuagelibre.org> 
À: "Jonathan Schaeffer" <jonathan.schaeffer at univ-brest.fr> 
Cc: pve-user at pve.proxmox.com 
Envoyé: Mercredi 20 Mars 2013 12:31:43 
Objet: Re: [PVE-User] Massive live migrations 

Hello, 

I want that since the beginning. XEN Center has it, I think VMware 
too... 

There is two problems to solve to be right : 
- Where migrating the VMs (this should work even without HA set up) 
- Remember where the VMs were, to migrate them back after the node come 
back 

That's why I thing it is not so simple. 

What I personally do, is a "for" loop on the node I want to bring down. 

For example : 
List the running VMs (and keep it somewhere to bring them back) : 
# vzlist 
CTID NPROC STATUS IP_ADDR HOSTNAME 
100 35 running 172.20.1.157 vmlxcap024.xxx 
101 72 running 172.20.1.163 vmlxcap030.xxx 
# qm list 
... 
(I don't have kvm VMs) 

# for vm in 100 101; do vzmigrate --live node2 $vm; done 
# for vm in 101 102; do qm migrate -online $vm node3 ; done 

Something like that. 

Le mer. 20 mars 2013 12:01:54 CET, Jonathan Schaeffer a écrit : 
> Hi all, 
> 
> is there a recipe (I could'nt find any on the wiki) to live migrate 
> all the VMs running on one host to the others (no matter where, as 
> soon as it gets away from here). 
> 
> I see at least two use cases where this is usefull : 
> 
> - emergency stop of a physical host 
> - scheduled downtime for ... lets say upgrade to the new shiy PVE version 
> 
> I can remember that pacemaker does it with one command "crm_standby -v 
> true" which is very convenient. Is there something equivalent in PVE ? 
> 
> cheers, 
> 
> jonathan 
> 



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