97c01e48ed
Currently we have all our elements and library files in a top-level directory and install them into <root>/share/diskimage-builder/[elements|lib] (where root is either / or the root of a virtualenv). The problem with this is that editable/development installs (pip -e) do *not* install data_files. Thus we have no canonical location to look for elements -- leading to the various odd things we do such as a whole bunch of guessing at the top of disk-image-create and having a special test-loader in tests/test_elements.py so we can run python unit tests on those elements that have it. data_files is really the wrong thing to use for what are essentially assets of the program. data_files install works well for things like config-files, init.d files or dropping documentation files. By moving the elements under the diskimage_builder package, we always know where they are relative to where we import from. In fact, pkg_resources has an api for this which we wrap in the new diskimage_builder/paths.py helper [1]. We use this helper to find the correct path in the couple of places we need to find the base-elements dir, and for the paths to import the library shell functions. Elements such as svc-map and pkg-map include python unit-tests, which we do not need tests/test_elements.py to special-case load any more. They just get found automatically by the normal subunit loader. I have a follow-on change (I69ca3d26fede0506a6353c077c69f735c8d84d28) to move disk-image-create to a regular python entry-point. Unfortunately, this has to move to work with setuptools. You'd think a symlink under diskimage_builder/[elements|lib] would work, but it doesn't. [1] this API handles stuff like getting files out of .zip archive modules, which we don't do. Essentially for us it's returning __file__. Change-Id: I5e3e3c97f385b1a4ff2031a161a55b231895df5b
1.9 KiB
iso
Generates a bootable ISO image from the kernel/ramdisk generated by
the elements baremetal, ironic-agent or
ramdisk. It uses isolinux to boot on BIOS machines and grub
to boot on EFI machines.
This element has been tested on the following distro(s): * ubuntu * fedora * debian
NOTE: For other distros, please make sure the
isolinux.bin file exists at
/usr/lib/syslinux/isolinux.bin.
baremetal element
When used with baremetal element, this generates a
bootable ISO image named <image-name>-boot.iso
booting the generated kernel and ramdisk. It also automatically appends
kernel command-line argument
'root=UUID=<uuid-of-the-root-partition>'. Any more kernel
command-line arguments required may be provided by specifying them in
DIB_BOOT_ISO_KERNEL_CMDLINE_ARGS.
NOTE: It uses pre-built efiboot.img by default to work for UEFI machines. This is because of a bug in latest version of grub[1]. The user may choose to avoid using pre-built binary and build efiboot.img on their own machine by setting the environment variable DIB_UEFI_ISO_BUILD_EFIBOOT to 1 (this might work only on certain versions of grub). The current efiboot.img was generated by the method build_efiboot_img() in 100-build-iso on Ubuntu 13.10 with grub 2.00-19ubuntu2.1.
ramdisk element
When used with ramdisk element, this generates a
bootable ISO image named <image-name>.iso booting the
generated kernel and ramdisk. It also automatically appends kernel
command-line argument 'boot_method=vmedia' which is required for Ironic
drivers iscsi_ilo.
ironic-agent element
When used with ironic-agent element, this generates a
bootable ISO image named <image-name>.iso which boots
the agent kernel and agent ramdisk.
REFERENCES
[1] https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1378658