Launch instance from image

When snapshotting and entire instance, the end result is an image. Restoring from a snapshot (assuming you restore the entire instance) is then the same as creating an instance from a private image.

When restoring an entire instance from a snapshot, which might be the case if for example an upgrade was unsuccessful post snapshot and you want to revert to the previous state, you would create a new instance from the image.

This is a good method because it allows you to safely ensure that your new instance is up and running before deleting the old one (and not doing major changes to the only copy of the image).

Note

While there is a feature in the cloud management portal to do an in place restore to the current instance, we do not recommend it, but rather that you follow below guide to create a new instance from the image.

See the below guides from creating an instance from a private image.

Cloud management portal

To create a snapshot using the Cloud management portal

  • Click Compute and then Images in the sidebar menu

  • On the image that you want to use as base, press the small arrow Create from image

  • Enter a name

  • Select a flavor in the Configuration field

  • Choose a availability zone

  • If applicable choose a SSH key

  • Choose a subnet

  • Click Create

OpenStack Horizon

To create a snapshot using OpenStack Horizon

OpenStack Terminal Client

To create a snapshot using the OpenStack Terminal Client

  • List the images and save the name of the image you want to create a new instance from

openstack image list --private

See also