HA node resources

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danielch1

New Member
Jan 29, 2016
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Hi


I’m about to implement Proxmox with HA (using iSCSI). I would like to know when a VM running on node 1, what happens in node 2? Does the proxmox sync the memory all the time? or does the machine stays at the same stat on the migration time? and where does this data stored? Does it take any resources from node 2 (when the VM is running on node 1)


Thanks
Daniel
 
Hi,
When a vm runs on node 1 then only the resources form node 1 are used.
When you migrate (live) then the memory will copied over then cluster network to the other node.
 
Thanks Wolfgang

If I did at the beginning migrating and set up the HA, later on on node 1 I added a new IP address. A few days later node 1 is down, it means that node 2 will not have the second IP address in memory unless I will do a restart to the network service, am I correct?
 
In case of a failure of node 1, the vm will be relocated.
When the vm is up on the node 2 it will be accessible on the same ip as before.
 
As before means as the first migration or the new IP I assigned to node 1 before the failure?

So, in order to keep up the instances sync as much as possible I would need to update the migration once a day?
 
No the vm keeps always the same IP.
And the disk data are the same on all nodes.
If a node fails the memory data get lost.

I think what you mean is hot standby where the vm is always in sync on multiple nodes?
If yes this is not supported jet.
 
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