)]}'
{"doc/source/user/block-device-mapping.rst":[{"author":{"_account_id":15334,"name":"Stephen Finucane","display_name":"stephenfin","email":"stephenfin@redhat.com","username":"sfinucan"},"change_message_id":"e6c924fbc5808055cc3ff22450eff466df03fdca","unresolved":false,"context_lines":[{"line_number":168,"context_line":"kind of block device the entry is referring to. The following"},{"line_number":169,"context_line":"combinations are supported:"},{"line_number":170,"context_line":""},{"line_number":171,"context_line":"* `image` -\u003e `local` - this is only currently reserved for the entry"},{"line_number":172,"context_line":"  referring to the Glance image that the instance is being booted with"},{"line_number":173,"context_line":"  (it should also be marked as a boot device). It is also worth noting"},{"line_number":174,"context_line":"  that an API request that specifies this, also has to provide the"},{"line_number":175,"context_line":"  same Glance uuid as the `image_ref` parameter to the boot request"},{"line_number":176,"context_line":"  (this is done for backwards compatibility and may be changed in the"},{"line_number":177,"context_line":"  future). This functionality might be extended to specify additional"},{"line_number":178,"context_line":"  Glance images to be attached to an instance after boot (similar to"},{"line_number":179,"context_line":"  kernel/ramdisk images) but this functionality is not supported by"},{"line_number":180,"context_line":"  any of the current drivers."},{"line_number":181,"context_line":"* `volume` -\u003e `volume` - this is just a Cinder volume to be attached to the"},{"line_number":182,"context_line":"  instance. It can be marked as a boot device."},{"line_number":183,"context_line":"* `snapshot` -\u003e `volume` - this works exactly as passing `type\u003dsnap` does."},{"line_number":184,"context_line":"  It would create a volume from a Cinder volume snapshot and attach that"},{"line_number":185,"context_line":"  volume to the instance. Can be marked bootable."},{"line_number":186,"context_line":"* `image` -\u003e `volume` - As one would imagine, this would download a Glance"},{"line_number":187,"context_line":"  image to a cinder volume and attach it to an instance. Can also be marked"},{"line_number":188,"context_line":"  as bootable. This is really only a shortcut for creating a volume out of"},{"line_number":189,"context_line":"  an image before booting an instance with the newly created volume."},{"line_number":190,"context_line":"* `blank` -\u003e `volume` - Creates a blank Cinder volume and attaches it. This"},{"line_number":191,"context_line":"  will also require the volume size to be set."},{"line_number":192,"context_line":"* `blank` -\u003e `local` - Depending on the guest_format field (see below),"},{"line_number":193,"context_line":"  this will either mean an ephemeral blank disk on hypervisor local"},{"line_number":194,"context_line":"  storage, or a swap disk (instances can have only one of those)."},{"line_number":195,"context_line":""},{"line_number":196,"context_line":""},{"line_number":197,"context_line":"Nova will not allow mixing of BDMv1 and BDMv2 in a single request, and"}],"source_content_type":"text/x-rst","patch_set":1,"id":"df3967d1_ac4d28c5","line":194,"range":{"start_line":171,"start_character":0,"end_line":194,"end_character":65},"updated":"2017-08-03 12:05:27.000000000","message":"Personally, I tend to prefer definition lists for these as I find them clearer. This is fine though.\n\n  `image` -\u003e `local`\n    This is only...","commit_id":"33617699108bb3eb9632af3800e918915a7e38c8"}]}