2 Host Cluster with SAN

[MikaSup]

Hello, I’m new to Proxmox.
I currently have two hosts in a cluster connected to a SAN, and I recently added a third host to serve as a quorum-only node for HA.

I created an HA for a test VM and set up an affinity rule with the following priorities:

Host1: priority 100

Host2: priority 90

However, when I reboot host1, the VM does not automatically migrate to host2.

I’m not sure what I might be missing — do I need to configure a QDevice? Or is there something else I should check?

Thank you,

 

[bbgeek17]

Hello @MikaSup , welcome to the forum.

We'd need to know more about your exact VM and rules configuration. As well as how you reboot the node.

In general, this is a good source for understanding the behavior :
https://pve.proxmox.com/wiki/High_Availability

Specifically: https://pve.proxmox.com/wiki/High_Availability#ha_manager_shutdown_policy
- Currently Conditional is the default due to backward compatibility. Some users may find that Migrate behaves more as expected.
- The Conditional shutdown policy automatically detects if a shutdown or a reboot is requested, and changes behaviour accordingly.
- This prevents those resources from being moved to other nodes. Instead, the CRM starts the resources after the reboot on the same node.

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[MikaSup]

Hello @bbgeek17,

Here’s some additional information:

I created a test VM with its Hard Disk (scsi0) stored on the SAN.
It’s currently running on Host1.

Under Datacenter > HA > Resources, the VM (vm:999) shows the following:

State: Started
Node: Host1
Max restart: 1
Max relocate: 1
Failback: Checked
Request state: Started

My goal is to set up HA so that if one host fails (due to internet connection or power loss), the other host will automatically take over, and vice versa.

I’ve tried testing this by rebooting the host running the VM (via the shell) and by disconnecting the host from the network, but the VM does not automatically migrate to Host2.

Thank you. Let me know if there is anything else I can provide.

 

[SteveITS]

Is this about the Datacenter Manager program or just PVE?

For PVE9 there is a thread about the hosts not fully migrating VMs before the host reboots. I don’t have a link handy, sorry.