Description of problem:

In RHEL9 the lvm package has replaced 69-dm-lvm-metad.rules with 69-dm-lvm.rules, implementing a new style of lvm autoactivation.

In RHEL8, dracut included 69-dm-lvm-metad.rules in the initrd where it set LVM_MD_PV_ACTIVATED=1.  This allowed root-on-lvm-on-md to work (see bug 2032993).

RHEL9 is currently missing the LVM_MD_PV_ACTIVATED=1 step in the initrd since 69-dm-lvm-metad.rules is gone.  So, root-on-lvm-on-md is broken, and leads to boot timeouts when an LV is used that requires autoactivation (commonly for home.)

To fix this in RHEL9, the 64-lvm.rules file in dracut needs to be patched to include this line:

KERNEL=="md[0-9]*", ACTION=="change", ENV{ID_FS_TYPE}=="LVM2_member", ENV{LVM_MD_PV_ACTIVATED}!="1", TEST=="md/array_state", ENV{LVM_MD_PV_ACTIVATED}="1"

Here's what my full working 64-lvm.rules file looks like:

SUBSYSTEM!="block", GOTO="lvm_end"
ACTION!="add|change", GOTO="lvm_end"
KERNEL=="md[0-9]*", ACTION=="change", ENV{ID_FS_TYPE}=="LVM2_member", ENV{LVM_MD_PV_ACTIVATED}!="1", TEST=="md/array_state", ENV{LVM_MD_PV_ACTIVATED}="1"
# Also don't process disks that are slated to be a multipath device
ENV{DM_MULTIPATH_DEVICE_PATH}=="1", GOTO="lvm_end"
KERNEL=="dm-[0-9]*", ACTION=="add", GOTO="lvm_end"
ENV{ID_FS_TYPE}!="LVM?_member", GOTO="lvm_end"

PROGRAM=="/bin/sh -c 'for i in $sys/$devpath/holders/dm-[0-9]*; do [ -e $$i ] && exit 0; done; exit 1;' ", \
    GOTO="lvm_end"

RUN+="/sbin/initqueue --settled --onetime --unique /sbin/lvm_scan"
RUN+="/sbin/initqueue --timeout --name 51-lvm_scan --onetime --unique /sbin/lvm_scan --partial"
RUN+="/bin/sh -c '>/tmp/.lvm_scan-%k;'"

LABEL="lvm_end"


(I am working on a larger set of changes to the dracut lvm module upstream which will hopefully be suitable for rhel9.  This will remove the dracut code that attempts to include the non-existent 69-dm-lvm-metad.rules in the initrd, among other things.)

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