[PVE-User] [pve-devel] online migration broken in latest updates - "unknown command 'mtunnel'"

Chance Ellis chance_ellis at yahoo.com
Fri Nov 18 18:01:44 CET 2016


Hi Tom,

You have the essential issue. 

I have my original cluster. All nodes are running these versions: http://pastebin.com/vquKJaKJ

As a test, I added a new node to the cluster, running these versions: http://pastebin.com/Jg5LH0RD

When I try to migrate from old->new, I get the following error: http://pastebin.com/YazWBtn2

When I try to migrate from new-> old, I get the following error: http://pastebin.com/hBfBnsYP

Thanks!






On 11/18/16, 11:44 AM, "pve-user on behalf of Thomas Lamprecht" <pve-user-bounces at pve.proxmox.com on behalf of t.lamprecht at proxmox.com> wrote:

    Hi,
    
    
    On 11/18/2016 05:02 PM, Chance Ellis wrote:
    > Hello,
    >
    > I am running a small cluster of 3 nodes. I would like to upgrade those nodes to the newer versions. The problem I will run into is a requirement for no down time.
    >
    > My normal upgrade plan is to live migrate vms off of node-1  to the remaining 2 nodes. I then upgrade and reboot node-1. Once node-1 is operational, I move vms from node-2 to node-1. I upgrade and reboot node-2. I follow the same for node-3.
    >
    > The issue I will run into is that once I upgrade node-1, I won’t be able to migrate vms from node-2 back to it because of the version mismatch on qemu-server and pve-cluster. The migration will fail. The only option I will have is to shutdown the vm and move the conf file. Back to the no down time requirement, this is less than ideal.
    
    If I understand you correctly you have
    new node1
    old node2
    
    And migration from node2 -> node1 does not work?
    That should not be, if you run into this can you post the error from the 
    migrate command?
    
    We normally try to guarantee that old -> new works, the other way around 
    cannot be always guaranteed.
    
    I tested this also now and it worked. I down graded a test node of mine, 
    started a VM there and live migrated it successfully to a upgraded VM.
    
    > Is there another way to migrate the vms with the new version packages using the old method that doesn’t detect or a separate migration network?
    
    If you have not configured it it will not be used.
    Migrate a unimportant test VM first to see if it works.
    
    cheers,
    Thomas
    
    >
    > Thanks!
    >
    >
    > On 11/11/16, 2:05 AM, "pve-user on behalf of Thomas Lamprecht" <pve-user-bounces at pve.proxmox.com on behalf of t.lamprecht at proxmox.com> wrote:
    >
    >      On 11/10/2016 10:35 PM, Lindsay Mathieson wrote:
    >      > On 11/11/2016 7:11 AM, Thomas Lamprecht wrote:
    >      >> Are you sure you upgraded all, i.e. used:
    >      >> apt update
    >      >> apt full-upgrade
    >      >
    >      > Resolved it thanks Thomas - I hadn't updated the *destination* server.
    >      >
    >      
    >      
    >      makes sense, should have been made sense a few days ago this, would not
    >      be too hard to catch :/
    >      
    >      anyway, for anyone reading this:
    >      When upgrading qemu-server to version 4.0.93 or newer you should upgrade
    >      all other nodes pve-cluster package to version 4.0-47 or newer, else
    >      migrations to those nodes will not work - as we use a new command to
    >      detect if we should send the traffic over a separate migration network.
    >      
    >      cheers,
    >      Thomas
    >      
    >      
    >      
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