History

Steve Baker 27a326dafb Support secure-boot bootloader where possible As of grub2 >= 2.02-95 on redhat family distros, calling grub2-install on an EFI partition will fail with: "this utility cannot be used for EFI platforms because it does not support UEFI Secure Boot." This version of grub is now in centos8-stream and non-eus repos of RHEL-8. It is not currently possible to build whole-disk UEFI images on these distros, and when this package is promoted this will also affect centos8 and RHEL-8 eus. The grub maintainers made this change because the grub2-install generated /boot/efi/EFI/BOOT/BOOTX64.EFI will never be capable of booting with Secure Boot. This change defines a $EFI_BOOT_DIR for every distro element. When directory /boot/efi/$EFI_BOOT_DIR exists a grub.cfg file in will be generated there. This change also installs the shim package on redhat family distros, which installs a copy of the shim bootloader to /boot/efi/EFI/BOOT/BOOTX64.EFI. Using centos as an example, this allows UEFI to boot the shim /boot/efi/EFI/BOOT/BOOTX64.EFI which then chains to /boot/efi/EFI/centos/grubx64.efi. If /boot/efi/$EFI_BOOT_DIR doesn't exist (such as for Ubuntu, /boot/efi/EFI/ubuntu) the current behaviour of running grub-install to generate /boot/efi/EFI/BOOT/BOOTX64.EFI will continue. For distros such as Ubutnu where packaging does not populate /boot/efi/EFI/ubuntu with .efi files, secure boot can be added in the future by copying .efi files to /boot/efi/EFI/ubuntu and copying the shim file to /boot/efi/EFI/BOOT/BOOTX64.EFI. Change-Id: I90925218ff2aa4c4daffcf86e686b6d98d6b0f21		2021-03-11 10:27:59 +13:00
..
environment.d	Support secure-boot bootloader where possible	2021-03-11 10:27:59 +13:00
test-elements/build-succeeds	Fix epel repo rewrite, add to testing	2018-10-24 12:39:59 +11:00
README.rst	Add CentOS 8 support	2020-02-19 10:44:56 +01:00
element-deps	Add CentOS 8 support	2020-02-19 10:44:56 +01:00

README.rst

centos7

Warning

This element is deprecated and is left only for backward compatibility. Use the centos element instead. Note that you should set DIB_RELEASE to 7 to indicate which release you are using. Please read the notes.

Use CentOS 7 cloud images as the baseline for built disk images.

For further details see the redhat-common README.

DIB_DISTRIBUTION_MIRROR:

Required: No
Default: None
Description: To use a CentOS Yum mirror, set this variable to the mirror URL before running bin/disk-image-create. This URL should point to the directory containing the 5/6/7 directories.
Example: DIB_DISTRIBUTION_MIRROR=http://amirror.com/centos

DIB_CLOUD_IMAGES:

Required: No
Description: Set the desired URL to fetch the images from. ppc64le: Currently the CentOS community is working on providing the ppc64le images. Until then you'll need to set this to a local image file.
Example: DIB_CLOUD_IMAGES=/path/to/my/centos/7/CentOS-7-x86_64-GenericCloud.qcow2.xz