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    Restoring a snapshot on an OpenStack instance

    If your OpenStack instance stops functioning due to unforeseen circumstances and you have enabled automatic snapshots, you can restore it using a previously created snapshot. In this tutorial, we'll show you how to restore your OpenStack instance using snapshots.

    In this guide, we explain how to set up automatic snapshots.


     

    Stap 1

    Log into the Horizon webinterface.


     

    Step 2

    Select the instance you want to restore. Then, under 'Actions', click the drop-down menu and select 'Rebuild instance'.

    openstack-rebuild-instance


     

    Step 3

    In the pop-up window, click and select the snapshot you want to restore from the drop-down menu under 'Select Image'. In our example, this is 'TestSnap4'.

    When you create a Snapshot in OpenStack, it is stored as an image. An image is a one-to-one copy of your Instance.

    openstack-select-image

    Under 'Disk Partition', you don't need to make any changes. Click 'Rebuild Instance' to restore the snapshot to the instance.

    openstack-rebuild-start

    You will now see a blue bar 'Rebuild Spawning' under 'Task'. The image/snapshot is being installed.

    openstack-rebuild-spawning

    When the bar stops, you will see the image/snapshot you selected under 'Image Name', and the status will return to active. Your snapshot is now restored, and the instance is recovered.

    openstack-active-state

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