Hi folks, I'll start with how my Proxmox is setup or at least was setup.
I had two nodes in the cluster that I created call PMOX. Everything was working fine until I had an issue with my home router, long story short I had to replace it due to physical fault.
Fast forward, new router got configured and it picked up the service (WAN) via DHCP and is on the VLAN I expected it to be.
I had my two Proxmox nodes on a .1 subnet, the router went on to VLAN 50, I saw this as an opportunity to move my Proxmox nodes to the 50 subnet. Since, I've done that I've created some chaos in my environment.
Proxmox node 1 (pvecm is broken):
I can't ping the management IP or access the proxmox gui
From node 2 I can SSH to node 1
cat /network/interfaces is as below
auto lo
iface lo inet loopback
auto eno1
iface eno1 inet manual
auto eno2
iface eno2 inet manual
auto vmbr0
iface vmbr0 inet static
address 192.168.50.191/24
gateway 192.168.50.1
bridge-ports eno1
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094
cat etc/hosts:
127.0.0.1 localhost.localdomain localhost
192.168.50.191 host host
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
Proxmox node 2 (pvecm appears intact):
cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface enp2s0 inet manual
auto enp1s0f0
iface enp1s0f0 inet manual
auto enp1s0f1
iface enp1s0f1 inet manual
auto enp1s0f2
iface enp1s0f2 inet manual
auto enp1s0f3
iface enp1s0f3 inet manual
auto vmbr0
iface vmbr0 inet static
address 192.168.50.192/24
gateway 192.168.50.1
bridge-ports enp2s0
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094
cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.50.192 optiplex optiplex
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
PVECM status - Can I add proxmox node 1 back to this cluster
Cluster information
-------------------
Name: pmox
Config Version: 2
Transport: knet
Secure auth: on
Quorum information
------------------
Date: Tue Mar 18 20:04:35 2025
Quorum provider: corosync_votequorum
Nodes: 1
Node ID: 0x00000002
Ring ID: 2.f6
Quorate: Yes
Votequorum information
----------------------
Expected votes: 1
Highest expected: 1
Total votes: 1
Quorum: 1
Flags: Quorate
Membership information
----------------------
Nodeid Votes Name
0x00000002 1 192.168.1.192 (local)
I will admit, that I did play around with the pvecm last night on proxmox node 1 as per this thread and post in particular https://www.reddit.com/r/Proxmox/comments/106f8wf/clusterfk_help_needed/
#!/bin/bash
systemctl stop pve-cluster corosync
pmxcfs -l
rm -r /etc/corosync/*
rm /etc/pve/corosync.conf
killall pmxcfs
systemctl start pve-cluster
Overall, what I need is to be able to use the first node as it has my main VM's on it. The second node I don't have anything of value on, it was an experiment to start with but the second node will now become a pfsense box once I sort my current issues.
I had two nodes in the cluster that I created call PMOX. Everything was working fine until I had an issue with my home router, long story short I had to replace it due to physical fault.
Fast forward, new router got configured and it picked up the service (WAN) via DHCP and is on the VLAN I expected it to be.
I had my two Proxmox nodes on a .1 subnet, the router went on to VLAN 50, I saw this as an opportunity to move my Proxmox nodes to the 50 subnet. Since, I've done that I've created some chaos in my environment.
Proxmox node 1 (pvecm is broken):
I can't ping the management IP or access the proxmox gui
From node 2 I can SSH to node 1
cat /network/interfaces is as below
auto lo
iface lo inet loopback
auto eno1
iface eno1 inet manual
auto eno2
iface eno2 inet manual
auto vmbr0
iface vmbr0 inet static
address 192.168.50.191/24
gateway 192.168.50.1
bridge-ports eno1
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094
cat etc/hosts:
127.0.0.1 localhost.localdomain localhost
192.168.50.191 host host
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
Proxmox node 2 (pvecm appears intact):
cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface enp2s0 inet manual
auto enp1s0f0
iface enp1s0f0 inet manual
auto enp1s0f1
iface enp1s0f1 inet manual
auto enp1s0f2
iface enp1s0f2 inet manual
auto enp1s0f3
iface enp1s0f3 inet manual
auto vmbr0
iface vmbr0 inet static
address 192.168.50.192/24
gateway 192.168.50.1
bridge-ports enp2s0
bridge-stp off
bridge-fd 0
bridge-vlan-aware yes
bridge-vids 2-4094
cat /etc/hosts
127.0.0.1 localhost.localdomain localhost
192.168.50.192 optiplex optiplex
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
PVECM status - Can I add proxmox node 1 back to this cluster
Cluster information
-------------------
Name: pmox
Config Version: 2
Transport: knet
Secure auth: on
Quorum information
------------------
Date: Tue Mar 18 20:04:35 2025
Quorum provider: corosync_votequorum
Nodes: 1
Node ID: 0x00000002
Ring ID: 2.f6
Quorate: Yes
Votequorum information
----------------------
Expected votes: 1
Highest expected: 1
Total votes: 1
Quorum: 1
Flags: Quorate
Membership information
----------------------
Nodeid Votes Name
0x00000002 1 192.168.1.192 (local)
I will admit, that I did play around with the pvecm last night on proxmox node 1 as per this thread and post in particular https://www.reddit.com/r/Proxmox/comments/106f8wf/clusterfk_help_needed/
#!/bin/bash
systemctl stop pve-cluster corosync
pmxcfs -l
rm -r /etc/corosync/*
rm /etc/pve/corosync.conf
killall pmxcfs
systemctl start pve-cluster
Overall, what I need is to be able to use the first node as it has my main VM's on it. The second node I don't have anything of value on, it was an experiment to start with but the second node will now become a pfsense box once I sort my current issues.