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stages/grub2: ability to not write kernel cmdline

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Currently we always write the kernel command line to the `grubenv`
file, if only to include the root device. Starting with Fedora 33
and thus RHEL 9, the kernel command line included statically in
the BLS snippets and the grubenv `kernelopts` variable not used.
Instead one of the {/usr/lib,/etc}/kernel/cmdline files is read
and the parameters in them used during the creation of the BLS
snippets.
Therefore we add a new `write_cmdline` option that, if set to
FALSE, will prevent us from writing the kernel command line.
This commit is contained in:
Christian Kellner 2021-12-17 15:01:07 +01:00 • committed by Tom Gundersen
parent d4f275e024
commit ee96b11faf
1 changed files with 11 additions and 5 deletions
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16
stages/org.osbuild.grub2
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@ -171,6 +171,11 @@ SCHEMA = """
"type": "boolean",
"default": true
},
"write_cmdline": {
"description": "Include the kernel command line in `grubenv`",
"type": "boolean",
"default": true
},
"ignition": {
"description": "Include ignition support in the grub.cfg",
"type": "boolean",
@ -468,13 +473,14 @@ class GrubConfig:
return data
#pylint: disable=too-many-statements
#pylint: disable=too-many-statements,too-many-branches
def main(tree, options):
root_fs = options.get("rootfs")
boot_fs = options.get("bootfs")
kernel_opts = options.get("kernel_opts", "")
legacy = options.get("legacy", None)
uefi = options.get("uefi", None)
write_cmdline = options.get("write_cmdline", True)
write_defaults = options.get("write_defaults", True)
ignition = options.get("ignition", False)
saved_entry = options.get("saved_entry")
@ -528,10 +534,10 @@ def main(tree, options):
with open(grubenv, "w") as env:
fs_type, fs_id = fs_spec_decode(root_fs)
data = (
"# GRUB Environment Block\n"
f"kernelopts=root={fs_type}={fs_id} {kernel_opts}\n"
)
data = "# GRUB Environment Block\n"
if write_cmdline:
data += f"kernelopts=root={fs_type}={fs_id} {kernel_opts}\n"
if saved_entry:
data += f"saved_entry={saved_entry}\n"