Yes, it is possible, but there are some limitations. If your pool is mirror add mirror, if raidz1 add raidz1
Example. You have pool zpoolxxx mirror-0 /dev/sda /dev/sdb
Add bigger disks to pool
zpool add zpoolxxx mirror /dev/sdc /dev/sdd
next
zpool remove zpoolxxx mirror-0
VM configuration is saved in the file /etc/pve/nodes/node_name/qemu-server/xxx.conf file
move this file on working node from /etc/pve/nodes/death_node/qemu-server/xxx.conf to working node.
or
change expected votes
pvecm expected xxxx
and
qm migrate xxx nodexxx
Ok
This command show your real interfaces and IP addresses
ip a
interface name uses in /etc/network/interfaces
cat /etc/network/interfaces
when you show your /etc/network/interfaces is mishmash
iface episo inet manual
auto umbro
iface unbro inet dhcp
address 192.168.0.50
gateway 192.168.0.1...
maybe this o not 0
enpso not enpis0
if you set dhcp
remove line address and gateway from /etc/network/interfaces
check what is real interface name
ip a
You set static IP 192.168.20.12 address when you install Proxmox.
You have to change from console.
Change in file
/etc/network/interfaces and /etc/hosts
Looks good. Try to ping your gateway from proxmox to 192.168.1.1
Firewall disable on cluster in file
/etc/pve/firewall/cluster.fw
firewall disable on host/node in file
/etc/pve/nodes/your_node_name/host.fw
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