Proxmox in-place upgrade
as I know some people around here are using proxmox, so I'd like to know if anyone has done an in-place upgrade from proxmox 3.x to 4.x and how that has been going?
( wiki article: https://pve.proxmox.com/wiki/Upgrade_from_3.x_to_4.0 )
I have an aged proxmox installation which I like to upgrade, yet there are VMs running in production on it and I'd like to avoid to migrate them to another server with the need for new IPs and such (no failover in place on those).
A short downtime isn't a problem at all, so I'd rather go for the in-place upgrade via apt if there aren't much reasons or bad experiences with this.
for sure I could install the whole hostnode freshly with jessie and proxmox and restore all VMs from previously taken backups, but that probably may require more time, so only considered as fallback.
any comments or suggestions?