Launch instance from image

When snapshotting and entire instance, the end result is an image. Restoring from a snapshot (assuming the entire instance was restored) 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 instance an upgrade failed post snapshot and you want to revert to the previous state, you would create a new instance from the image that was generated.

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.

Please follow our below guide from creating an instance from a private image using our various tools.

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 private 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