Subject: Inquiry regarding Failover Clustering between two virtual machines

Subject: Inquiry regarding Failover Clustering between two virtual machines

[Zoltán Szalay]

Dear Proxmox Support Team,

I am writing to inquire about the capabilities of Proxmox VE regarding high availability and clustering. Specifically, I would like to know if Proxmox VE supports setting up a failover cluster between two virtual machines (VMs).
We are currently trying to create a failover cluster between two virtual servers that are hosted on the exact same Proxmox PVE node. However, we have run into some difficulties and complications during the setup process.
Could you please confirm if this specific configuration is officially supported on a single host? If so, I would highly appreciate it if you could share any best practices, recommended configurations, or documentation links to help us resolve these issues.
Thank you for your time and assistance. I look forward to your guidance.
Sincerely,

Zoltan Szalay

Re: Subject: Inquiry regarding Failover Clustering between two virtual machines

[Alwin Antreich]

Hi Zoltán,
 
"Zoltán Szalay" zszalay@e-track.eu – 16. Juni 2026 um 12:09
> Dear Proxmox Support Team,
> 
> I am writing to inquire about the capabilities of Proxmox VE regarding high availability and clustering. Specifically, I would like to know if Proxmox VE supports setting up a failover cluster between two virtual machines (VMs).
 
Do you mean by failover cluster, the equivalent of VMware vSphere Fault Tolerance? If yes, then I have to disappoint, AFAIK this functionality is not yet mature in Qemu. Hence it doesn't exist in PVE.
 
Best wishes,
Alwin

Re: Subject: Inquiry regarding Failover Clustering between two virtual machines

[Andrei Boros]

To my knowledge, the VM will start on a different node, you should
perceive it like a guest OS reboot.
Though I am not sure with regards to guest filesytem consistency when
the hardware host failed

On 2026-06-16 1:28 PM, Alwin Antreich wrote:
> Hi Zoltán,
>  
> "Zoltán Szalay" zszalay@e-track.eu – 16. Juni 2026 um 12:09
>> Dear Proxmox Support Team,
>>  
>> I am writing to inquire about the capabilities of Proxmox VE regarding high availability and clustering. Specifically, I would like to know if Proxmox VE supports setting up a failover cluster between two virtual machines (VMs).
>  
> Do you mean by failover cluster, the equivalent of VMware vSphere Fault Tolerance? If yes, then I have to disappoint, AFAIK this functionality is not yet mature in Qemu. Hence it doesn't exist in PVE.
>  
> Best wishes,
> Alwin
>
>

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