Bug#827407: multipath-tools: initramfs should load same mp modules as sysvinit/sysmtemd files

[Andrew Patterson]

On Thu, 16 Jun 2016 15:28:42 +0530 Ritesh Raj Sarraf <rrs at debian.org> wrote:
> On Wed, 2016-06-15 at 14:05 -0600, Andrew Patterson wrote:
> > The systemd multpath-tools.service loads multipath modules using the following
> > line:
> > 
> > ExecStartPre=/sbin/modprobe -a scsi_dh_alua scsi_dh_emc scsi_dh_rdac dm-
> > multipath
> > 
> > While the sysvinit file /etc/init.d/multipath-tools-boot loads modules with:
> > 
> > modprobe dm-multipath 2> /dev/null || true
> > 
> > The /usr/share/initramfs-tools/scripts/local-top/multipath load modules using:
> > 
> > MP_MODULES="dm-multipath dm-emc"
> > for module in ${MP_MODULES}; do
> > Â  if modprobe "$module"; then
> > Â Â Â  verbose && log_success_msg "loaded module ${module}."
> > Â  else
> > Â Â Â  log_failure_msg "failed to load module ${module}."
> > Â  fi
> > done
> > 
> > All three of these methods should load the same set of modules (the
> > systemd one seems to be best).  Perhaps, there should be a
> > /etc/default/multipath-tools config file that governs which modules to
> > load?
> 
> Yes. That'd be good. Perhaps the module loading could be delegated to a separate
> shell script. Such a script can then be invoked in ExecStartPre for systemd, and
> for shell initscripts we'll just have to source it into the main initscript.

Yes. Although it may take some work to get it into the initramfs.

> 
> Do you want to submit a patch for this ?
> 
>

I would be happy too. Give me a couple of days.

-- 
Andrew Patterson
Hewlett-Packard Enterprise