network interfaces being deleted

[sam2]

Every time I create a new proxmox server, I add vmbr2 , a virtual bridge interface.

I notice that it creates /etc/network/interfaces.new , which will be applied after the reboot.

This file /etc/network/interfaces.new invariably seems to be missing some important lines. Either eth0 is getting disabled for no reason, or eth1 , or just now the lo (loopback) got deleted.

Basically, the only change which should be made is that vmbr2 is added, and that's it. Nothing else.

It looks like a bug. How to reproduce it? I have just explained that. Install a fresh proxmox server, add vmbr2 from the GUI, reboot.

 

[dietmar]

Please can you post the original /etc/network/interfaces and the wrong /etc/network/interfaces.new files?

 

[sam2]

Please can you post the original /etc/network/interfaces and the wrong /etc/network/interfaces.new files?

I have since fixed it manually. Simply speaking, lines were missing from the file. on multiple servers.

Ok, it just occurred to me that our ISP has some weird customized server installation methods, so it could be an artifact of that.

If anyone else reports this issue, keep it in mind.

I am not blocked here, since it's easily correctable.