1 node of cluster not communication with others

K

k5map

New Member
Jun 27, 2025
10
2
3
Cypress, TX
After applying updates on all 3 of my nodes, now 1 of the nodes will not communicate with the others. It has a green check but question mark on the others. When I check the other 2, they have green checks but the third has a question mark.

I've performed these steps in an attempt to get the cluster back working:
  1. systemctl stop pve-cluster
  2. systemctl stop corosync
  3. Confirmed pmxcfs is stopped on all 3
  4. systemctl start pve-cluster
  5. systemctl start corosync
  6. Confirmed pmxcfs is running on all 3
This still does not get my cluster nodes working again. Any ideas or suggestions on how to proceed?

Here is the output from pvecm status:
Cluster information
-------------------
Name: PVE-Cluster
Config Version: 7
Transport: knet
Secure auth: on

Quorum information
------------------
Date: Sat Aug 16 23:00:05 2025
Quorum provider: corosync_votequorum
Nodes: 3
Node ID: 0x00000002
Ring ID: 1.b5
Quorate: Yes

Votequorum information
----------------------
Expected votes: 3
Highest expected: 3
Total votes: 3
Quorum: 2
Flags: Quorate

Membership information
----------------------
Nodeid Votes Name
0x00000001 1 172.28.254.51
0x00000002 1 172.28.254.52 (local)
0x00000003 1 172.28.254.55
Click to expand...
 
Last edited:
Hello,
Did you managed to solve it?
If not, Please provide the output of the following cmds from the known working node and one of the working nodes:
Bash: 
~# corosync-cfgtool -n
~# cat /etc/pve/.members
~# cat /etc/hosts

Also, Verify the ssh access between the nodes using the IP on hosts file.
 
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