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"
<[email protected] on behalf of [email protected]> 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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