Last updated 7th July 2020
The Fault Tolerance (FT) functionality of VMware's vSphere allows to protect a virtual machine from hardware failures by cloning the VM on two separate hosts.
This guide explains the usage of Fault Tolerance on your VMs.
- vSphere HA activated
- Resource reservation equal to 100% of memory
- VMware Tools installed
- Same generation processors
- 4 vCPUs maximum
To activate Fault Tolerance, right-click on a VM, then click
Fault Tolerance and
Turn On Fault Tolerance.
A configuration window will open, prompting you to make choices for the secondary VM.
- The host
Finally, a summary of your choices is displayed. Validate to enable FT on your virtual machine.
Your virtual machine is now protected by Fault Tolerance, its icon is different and it will show as "primary".
Several operations are now available according to your needs.
The OVHcloud Resilience mode is a good way to test your FT-activated virtual machine for high availability.
Impossible and incompatible actions
On a virtual machine with Fault Tolerance enabled, it is no longer possible to perform certain actions or to use certain devices.
Join our community of users on https://community.ovh.com/en/.