Cannot access another node "Connection errorError Connection error - server offline?"

[willydwi77]

Hello, I'm a bit confused here. I have two nodes (pve1 and pve2) that are combined into a single cluster called "melinda2". The issue is, when I open pve1, I can access pve2 from the website interface. However, when I open pve2 and try to access pve1, it says "Error Connection error - server offline?" So, what is happening here?

Previously, I changed the IP addresses of both nodes, but I have already updated them in the files `/etc/network/interfaces`, `/etc/hosts`, and `/etc/pve/coronsync.conf`.

Here for the pvecm status

root@pve1:~# pvecm status
Cluster information
-------------------
Name:             melinda2
Config Version:   2
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             Fri Jan  3 16:10:48 2025
Quorum provider:  corosync_votequorum
Nodes:            2
Node ID:          0x00000001
Ring ID:          1.107d
Quorate:          Yes

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      2
Quorum:           2
Flags:            Quorate

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.70.100 (local)
0x00000002          1 192.168.70.101

###################################################################

root@pve2:~# pvecm status
Cluster information
-------------------
Name:             melinda2
Config Version:   2
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             Fri Jan  3 16:11:20 2025
Quorum provider:  corosync_votequorum
Nodes:            2
Node ID:          0x00000002
Ring ID:          1.107d
Quorate:          Yes

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      2
Quorum:           2
Flags:            Quorate

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.70.100
0x00000002          1 192.168.70.101 (local)

 

[UdoB]

Verify /etc/hosts and compare for both hosts. Both files should contain complete and identical information - in fact you can copy one to the other.

"ping pve1" and "ping pve2" should work on both nodes with the same success.

Warning: do not change the names. The cluster may fell apart. (Background: https://pve.proxmox.com/wiki/Renaming_a_PVE_node)

Edit 2: you know you should have a third vote on the long run, don't you? --> https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_corosync_external_vote_support