Old netmask format causes issues after PVE 7 upgrade

[otbutz]

Some nodes refused to connect with the rest of the cluster. The issue was caused by the old netmask syntax in the /etc/network/interfaces config:

auto vmbr0
iface vmbr0 inet static
        address  192.168.1.1
        gateway  192.168.100.254
        netmask  255.255.0.0
        bridge_ports bond0
        bridge_stp off
        bridge_fd 0

Changing it to the following lines fixed it:

auto vmbr0
iface vmbr0 inet static
        address  192.168.1.1/16
        gateway  192.168.100.254
        bridge_ports bond0
        bridge_stp off
        bridge_fd 0

 

[mira]

Is this with ifupdown2 installed?

It seems ifupdown2 ignores the `netmask` property and assumes a /32 subnet for the address.

 

[otbutz]

Both problematic nodes are still using the older ifupdown.

IMHO this should be added to https://pve.proxmox.com/wiki/Upgrade_from_6.x_to_7.0#Actions_step-by-step