The cloud-init functionality has been extended to support the use of a configuration drive data source in an OpenStack environment. The configuration drive uses the user-data attribute to pass a validated Junos OS configuration file to the instance. The user-data can be plain text or MIME file type text/plain. The configuration drive is typically used in conjunction with the Compute service, and is present to the instance as a disk partition labeled config-2. The configuration drive has a maximum size of 64 MB, and must be formatted with either the vfat or ISO 9660 filesystem.
The configuration drive data source also provides the flexibility to add more than one file that can be used for configuration. A typical use case would be to add a Day0 configuration file and a license file.
