Proxmox cluster reboots on network loss?


New Member
Aug 10, 2020
Our team has experienced this twice now, when switches are rebooted during a network upgrade it causes all nodes in the cluster to reboot. I am unable to find information regarding this.

Note that Watchdog is turned off.


Proxmox Staff Member
Staff member
Jun 3, 2019
This sounds like you have/had HA enabled guests on the nodes at some point. If a node with HA enabled guests (present or since the last reboot) loses the connection to the quorum part of the cluster for more than 2 minutes, it will fence (hard reset) itself.

You can check it by going to the Datacenter->HA panel. Each node for which the `lrm` service is shown as `active` will fence itself if it loses connection to the cluster.


Active Member
Mar 23, 2011
Sorry to necro this thread, but it's one of *many* that come up with this title, and it's directly to the core issue.

Proxmox needs to have an configurable option for behavior on Fencing. Rebooting an entire cluster upon the loss of a networking element is the sledgehammer, and we need the scalpel.


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