Question: How to use HA with only CEPH as primary storage?

[EduFrazao]

problem

Hi. I want to use HA features on my zones, but I only use CEPH as primary storage.
My hypervisors uses RedFish as out-of-band management and are directly reachable from my management servers (and vice versa).

With HA enabled, I got this warning on agent logs (thousands):

2026-08-04 08:12:34,270 WARN  [kvm.resource.KVMHAChecker] (pool-26029-thread-1:[]) (logid:) All checks with KVMHAChecker for host IP [10.1.0.2] in pools [] considered it as dead. It may cause a shutdown of the host.
2026-08-04 08:12:35,785 WARN  [kvm.resource.KVMHAChecker] (pool-26030-thread-1:[]) (logid:) All checks with KVMHAChecker for host IP [10.1.0.1] in pools [] considered it as dead. It may cause a shutdown of the host.

Maybe I should deploy a CephFS with Ganesha NFS, set it as a primary storage with a tag that no VM uses?

My HA state becomes degraded.

versions

Cloudstack 4.22.1.0
Hypervisor: Rocky Linux 10.2

The steps to reproduce the bug

1. Deploy a site with CEPH RBD as primary storage
2. Configure KVMHAChecker as HA Provider
3. Configure OutOfBand Management
4. Enable HA on hosts

What to do about it?

No response

[kiranchavala]

@EduFrazao currently KVM HA provider for host ha is supported only with NFS storage

https://www.shapeblue.com/host-ha-for-kvm-hosts-in-cloudstack/

Please refer to this video if you are looking for other storage types

https://www.youtube.com/watch?v=Ar0_I9JZXSI&t=38s

[EduFrazao]

I understand.
There was a PR to bring support to ceph but it is now closed.
I will keep and eye on it.

For now, I've setup a ganesha export over my ceph rbd cluster and mapped it as a tagged primary storage for ha locks only.
Thank you!