Is it possible to update a VM without downtime?

[holckj]

I have a small cluster with a VM providing services (web, email ..) to the outside world. Now and then this VM needs to be updated, e.g. with a new kernel version, and this may require rebooting the VM, leading to 5-10 minutes of downtime. Is it in some way possible to update the VM without interrupting its services?

Thanks for any comments,
Jesper, Denmark

 

[LnxBil]

I have a small cluster with a VM providing services (web, email ..) to the outside world. Now and then this VM needs to be updated, e.g. with a new kernel version, and this may require rebooting the VM, leading to 5-10 minutes of downtime. Is it in some way possible to update the VM without interrupting its services?

You have to ask the maintainer of the OS of the VM. This is generally not the scope of PVE.

For a HA setup, you normally provide a HA stack and run more than one VM providing the same service.