# Is it Possible to Automatically Evacuate Instances From Host in Event of Host Failure?

## Problem

In the event of a host failure within a Platform9 Managed OpenStack environment, instances which reside on the failed host will remain offline until the host connectivity is restored.

## Environment

* Platform9 Managed OpenStack - v3.6.0 and Higher
* Virtual Machine High Availability (VMHA)
* Compute hosts are configured with instance shared storage

## Answer

Yes, this can be accomplished by leveraging the Virtual Machine High Availability (VMHA) feature provided by Platform9. In the event of a host failure, this feature is designed to automatically evacuate instances from a failed host to an active, running host.

Please contact Platform9 Support to enable this feature in your environment.

## Additional Information

* [Virtual Machine High Availability with Platform9 OpenStack](https://platform9.com/blog/virtual-machine-high-availability-platform9-openstack/)
* [Enabling High Availability on Availability Zones in Platform9 Managed OpenStack](https://docs.platform9.com/support/enable-high-availability-zones/)


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