multipath module assumes host and target multipath are the same

[airtower-luna]

In its install function the module calls multipath -t, with the clear assumption that the result describes the version to be installed into the initrd:

dracut/modules.d/70multipath/module-setup.sh

Lines 80 to 88 in 8453799

	local k v
	while read -r k v; do
	if [[ $k == "config_dir" ]]; then
	v="${v#\"}"
	config_dir="${v%\"}"
	break
	fi
	done < <(multipath -t 2> /dev/null)
	[[ -d $config_dir ]] || config_dir=/etc/multipath/conf.d

This does not work with --sysroot: The multipath binary in the sysroot may be different from the one in PATH, and in case of a cross-compiled sysroot it may not be executable at all while building the initrd.

The result is used to determine the config directory, with a fallback to /etc/multipath/conf.d if unsuccessful, so it may not be critical (I'm not familiar with the module or multipath).

If possible the location should be determined without calling the binary, if this is not possible the binary in the sysroot (if any) needs to be called, with an override for cross-sysroot where that cannot work (see the busybox module for an example).