communication failure (0) in "Cluster" view when one node is down

masterx

New Member
Jun 6, 2020
10
1
3
20
Hi,

I've set up a three node cluster on three different sites connected via site to site VPN and one of the sites is currently completely down. Since then, I wasn't able to view the Cluster status, all it says is "Loading..." and then "communication failure (0)" after like 30 seconds.

Is this expected behaviour, are the remaining nodes still syncing? The master is still online and connected to the remaining slave node.

Thanks!
 

wolfgang

Proxmox Staff Member
Staff member
Oct 1, 2014
5,966
398
103
I've set up a three node cluster on three different sites connected via site to site VPN
This setup is not recommended and also not supported by Proxmox.
Corosync the Custer communication of Proxmox VE is made for local networks that have low latency.
If the latency is too high you will lose the capability to manage the cluster.
 

masterx

New Member
Jun 6, 2020
10
1
3
20
Is this also applicable to Proxmox Mail Gateway, which is what I'm using?
You were referring to Proxmox VE...

Thanks
 

Stoiko Ivanov

Proxmox Staff Member
Staff member
May 2, 2018
3,581
421
88
What's the output of pmgcm status on the nodes that are online?
 

masterx

New Member
Jun 6, 2020
10
1
3
20
sorry for not coming back to you earlier. i just wanted to reproduce the issue but unfortunately it didn't reoccur when I shut down one of the nodes. Not even if I just disconnect the network adapter of one of the gateways (to simulate an unexpected connection loss)...

I'll report back with the output of pmgcm status if the issue reappears.
 
  • Like
Reactions: Stoiko Ivanov

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE and Proxmox Mail Gateway. We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get your own in 60 seconds.

Buy now!