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In Abiquo, the main implementation of cloud-init is using a Configuration Drive. See reference: httphttps://cloudinit.readthedocs.io/en/latest/topics/datasources/configdrive.html
The Configuration drive enables users to automate the configuration of a VM at first boot because it creates an ISO disk with user data files. Then Cloud-init or a similar system can configure the VM from the user data.
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