Update provision/initramfs/detect

provision/initramfs/detect uses a fairly naive approach of matching device modalias against the kernel's modules.alias to find the kernel modules to load.

Example of detect's logic failing to find an Intel Optane drive to load the nvme kernel module:

$ PCI=/sys/bus/pci/devices/0000\:05\:00.0
$ VENDOR_1=`cat $PCI/vendor`
$ DEVICE_1=`cat $PCI/device`
$ ALIAS=`printf "v%08xd%08x\n" $VENDOR_1 $DEVICE_1`
$ echo $ALIAS
v00008086d00002701
$ grep -i "$ALIAS" /lib/modules/$(uname -r)/modules.alias | awk '{print $3}'

# grep nvme /lib/modules/$(uname -r)/modules.alias
alias pci:v*d*sv*sd*bc01sc08i02* nvme
alias pci:v0000144Dd0000A822sv*sd*bc*sc*i* nvme
alias pci:v0000144Dd0000A821sv*sd*bc*sc*i* nvme
alias pci:v00001C5Fd00000540sv*sd*bc*sc*i* nvme
alias pci:v00001C58d00000023sv*sd*bc*sc*i* nvme
alias pci:v00001C58d00000003sv*sd*bc*sc*i* nvme
alias pci:v00008086d00005845sv*sd*bc*sc*i* nvme
alias pci:v00008086d0000F1A5sv*sd*bc*sc*i* nvme
alias pci:v00008086d00000A55sv*sd*bc*sc*i* nvme
alias pci:v00008086d00000A54sv*sd*bc*sc*i* nvme
alias pci:v00008086d00000A53sv*sd*bc*sc*i* nvme
alias pci:v00008086d00000953sv*sd*bc*sc*i* nvme
alias nvmet-transport-254 nvme_loop
alias nvmet-transport-1 nvmet_rdma

# cat $PCI/modalias
pci:v00008086d00002701sv00008086sd00003905bc01sc08i02

The first nvme entry above alias pci:v*d*sv*sd*bc01sc08i02* nvme, actually matches on the full modalias.

Likely approach:

Disable modprobe small - https://github.com/warewulf/warewulf3/blob/development/provision/initramfs/busybox.config.in#L532
Try using /sbin/modprobe --show-depends <modalias>
http://lists.busybox.net/pipermail/busybox/2015-March/082688.html

    find /sys/devices -name modalias -print0 \
        | xargs -0 sort -u \
        | xargs modprobe -a -q -b 2>/dev/null

warewulf / warewulf3

Update provision/initramfs/detect #176