dmraid - possible boot fail due to mdraid rules?

Miroslav Shaltev
2015-01-09T12:50:54Z

Dear all,

i have a question regarding the dmraid module.

On a centos 7 system (but i am afraid the problem is distro independent)

kernel: 3.10.0-123.13.2.el7.x86_64
dracut: dracut-033-161.el7.x86_64
storage: dmraid 1 with lvm on top

with a root on a dmraid device, some mdraid udev rules get pulled into
the initramfs.

The output of dracut -M

bash i18n network ifcfg drm plymouth dm dmraid kernel-modules lvm
resume rootfs-block terminfo udev-rules biosdevname systemd usrmount
base fs-lib shutdown

gives no hint about that. However

grep -r "64-md-raid.rules" dracut/modules.d/*

dracut/modules.d/90dmraid/module-setup.sh: inst_rules 64-md-raid.rules

dracut/modules.d/90mdraid/module-setup.sh: inst_rules 64-md-raid.rules

Due to the mdraid rules, the actual dmraid device cannot be activated,
as a result the /dev/mapper links are pointing to wrong devices and the
boot fails.

Commenting out the line in dracut/modules.d/90dmraid/module-setup.sh
allows me to create bootable initramfs images.

Could it be, that the line in dracut/modules.d/90dmraid/module-setup.sh
was introduced just by a mistake or should i fill a bug report?

Cheers,
miroslav

--
Dr. Miroslav Shaltev
- Systemadministration -
Forschungszentrum L3S
Appelstrasse 9a
30167 Hannover
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E-Mail: shaltev-ng3u6l8Qjkg@public.gmane.org