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OpenStack has a useful rebuild function that allows you to rebuild an instance from a fresh image while maintaining the same fixed and floating IP addresses, amongst other metadata.

Web Interface

1.In Web Interface Compute->Instances, select the VM you wish to associate the floating IP
2.

Click the drop-down menu on the right-hand side (in Actions column) and select REBUILD INSTANCE

Image Modified

3.

Select the image from the drop-down menu in the pop-up. Click on the REBUILD button.

Image Modified

4.

The instance will be rebuilt with the new image

Image Modified


Command-Line

Get the Server ID (Instance) and the Image ID

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