multipathd?

[Michael Di Domenico]

On Sat, Jul 15, 2017 at 11:05 AM, Patrick 'P. J.' McDermott
<pj at pehjota.net> wrote:
>
> On 2017-07-14 at 14:46, Michael Di Domenico wrote:
>> does anyone know if it's possible to run multipathd under busybox?  i
>> suspect this is a fools errand given that multipath is a redhat
>> project, which then ties it with udev which then ties it with systemd.
>
>
> ... I think what you need instead is dmsetup, maintained within LVM2, to
> create the /dev/mapper nodes for multipathd.

thanks, i look into eudev.

i do have dmsetup copied over into the initramfs, i use it to create
COW devices before i boot the OS.  i *think* the issue is that
multipathd that comes with redhat has been tweaked to count on gather
the device UUID's from udev environ variables now, rather then calling
scsi_id or some other program directly.  there used to be a
uid_callout(?) option that allowed you to specify a program.  it
appears that's since been removed.

is there any other option to RHEL's version of multipathd?  i found
some things on the net, but i have some concerns over stability.  just
looking for a recommendation.