Lists valid steps at which the
user can choose to pause or resume building an image if checkpointing is
active. This command option queries the manifest file for valid steps. Use the
step names provided by this command as valid values for the other checkpointing
command options. The build subcommand is required. The manifest field is required.
Note - Checkpointing is
active by default, but requires ZFS filesystems. Step values other than the first
value correspond to finalizer script entries in the manifest file.
For example, the manifest,
slim_cd/all_lang_slim_cd_x86.xml, includes the following steps:
im-pop – Populate the image with packages
im-mod – Image area modifications
slim-im-mod – Slim CD image area modifications
br-init – Boot-root initialization
slim-br-config – Slim CD boot-root configuration
br-config – Boot-root configuration
br-arch – Boot-root archiving
slim-post-mod – Slim CD post-boot-root image area modifications
grub-setup – GRUB menu setup
post-mod – Post-boot-root image area modification
gen-slim-cont – Generate Slim CD image content list
iso – ISO image creation
When additional scripts are added, additional default checkpoint
steps are added in the manifest file.
Note - You can edit the checkpoint step names
in the manifest file. Use meaningful names for custom checkpoint steps in the
manifest file instead of using step numbers. If new scripts are added, the
new steps for those new scripts will disrupt a prior numbered step order. For
example, the following reference in a manifest file specifies the checkpoint name of
“br-arch” for a boot root archiving script: <script name="/usr/share/distro_const/bootroot_archive.py">
<checkpoint name="br-arch" message="Boot root archiving"/> In this example, when you build your
image, you could refer to the “br-arch” checkpoint in the distro_const command. This
checkpoint would enable you to pause building the image just before the boot
root archiving script performs its task.
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