feat: Initialize a bootloader role

[spetrosi]

Enhancement: Add bootloader system role to manage bootloader configuration consistently.

Adding support for the following functionality:

• Gathering bootloader facts
• Modifying bootloader arguments
• Modifying bootloader timeout
• Modifying bootloader password

Issue Tracker Tickets (Jira or BZ if any): RHELPLAN-35009

[spetrosi]

[citest]

[richm]

We should have some examples of that show the kernel command line before running the role, and what the command line looks like after running the role will various parameters e.g.

before
args="rhgb quiet"

with parameters as above will result in
args="rhgb quiet crashkernel=auto no_timer_check debug rd.lvm.lv resume"

with parameters as above with `previous: replaced` will result in
args="quiet crashkernel=auto no_timer_check debug rd.lvm.lv resume"

most people using this role will be familiar with grubby other tools that let you edit the kernel command line in a similar format, so having examples like that should help.

[spetrosi]

WIll do

[richm]

Suggested change

	( echo {{ bootloader_password }} ; echo {{ bootloader_password }} )
	( echo {{ bootloader_password | quote }} ; echo {{ bootloader_password | quote }} )

[richm]

and maybe there is a more secure way to do this

[spetrosi]

Unfortunately, no. The usual way to do this is by running grub2-setpassword, but it does not allow inputtng via echo:

# ( echo "12345" ; echo "12345" ) | grub2-setpassword
stty: standard input: Inappropriate ioctl for device

There is no way to input other than echo, no env var for this or so.

[spetrosi]

[citest]

[spetrosi]

[citest]

[spetrosi]

[citest]

[spetrosi]

[citest]

[spetrosi]

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[spetrosi]

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[spetrosi]

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[spetrosi]

[citest]

[spetrosi]

[citest]

[spetrosi]

@richm can you please take a look what I am missing in unit tests?

[richm]

tests/unit/bootloader_settings.yml? should be a .py python file?

[spetrosi]

[citest]

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[spetrosi]

[citest]

[spetrosi]

[citest]

[spetrosi]

TODO:

1. Check mode for bottloader_settings.py
2. Adding and removing kernels - add a state dict key to bootloader_settings. Maybe it would make sense to accept a single entry for bootloader_settings.kernel.path, bootloader_settings.kernel.index, bootloader_settings.kernel.title. In this case, users won't be able to apply the same bottloader settings to a set of specific kernels, but I do not think that they will use it at all. You still can apply settings to ALL, or just copy settings for several specifi kernels if you need to. This way, bootloader_settings will be more consistent in adding a new kernel and changing an existing kernel.
3. Support Debian for SAP roles
4. Change boot device - add a new variable bootloader_boot_device.

[spetrosi]

[citest]