Handle non-existant /proc/modules about dracut HOT 7 CLOSED

FWIW, the same problem happens when /proc is not mounted at all (for example in some build chroot environment). Workaround of touch /proc/modules in that case works.

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I ran into this issue, since I am building kernels for certain machines without loadable module support. In hostonly mode, Dracut 049 gives the message:

libkmod: kmod_module_new_from_loaded: could not open /proc/modules: No such file or directory
dracut-install: Could not get list of loaded modules: Unknown error -2. Switching to non-hostonly mode.

I would prefer the behavior to be that if in hostonly mode and /proc/modules does not exist, Dracut will not attempt to include any modules (and probably log a message about skipping modules due to absence of /proc/modules), but will stay in hostonly mode.

There is a workaround, but it's non-obvious and rather ugly. You have to both:

1. Specify no_kernel
2. Set DRACUT_KERNEL_MODALIASES to point to an empty file (the file must exist!)

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This issue is being marked as stale because it has not had any recent activity. It will be closed if no further activity occurs. If this is still an issue in the latest release of Dracut and you would like to keep it open please comment on this issue within the next 7 days. Thank you for your contributions.

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This problem still reproduces in the latest Dracut (5da7038). Please keep this issue open if there is any chance of it ever being fixed.

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@martinmcclure I'll keep it open

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This issue is being marked as stale because it has not had any recent activity. It will be closed if no further activity occurs. If this is still an issue in the latest release of Dracut and you would like to keep it open please comment on this issue within the next 7 days. Thank you for your contributions.

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This may be the same issue or related, but I built my kernel without any modules and tried running dracut v 053:

dracut --hostonly --kver 5.15.1-gentoo -f /boot/initramfs-5.15.1-gentoo.img
dracut: Cannot find module directory /lib/modules/5.15.1-gentoo/
dracut: and --no-kernel was not specified

My /lib/modules/ contains

/lib/modules/
├── build -> /usr/src/linux-5.15.1-gentoo
├── kernel
├── modules.order
└── source -> /usr/src/linux-5.15.1-gentoo

The workaround is creating a blank directory, /lib/modules/5.15.1-gentoo, and the command works.

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