mdadm 3.4-1, error msg. on boot - no /usr/lib/systemd/scripts/mdadm_env.sh

["David C. Rankin" <drankinatty@suddenlinkmail.com>]

Neil, All,

  I'm chasing down the reason there is no /usr/lib/systemd/scripts/mdadm_env.sh
provided with mdadm. This is more a curiosity really as mdmonitor continues to
run, but it always throws an error at boot:

Jun 05 17:12:47 valhalla systemd[454]: mdmonitor.service: Failed at step EXEC
spawning /usr/lib/systemd/scripts/mdadm_env.sh: No such file or directory

  I have several Arch servers, all on mdadm 3.4-1. I ran into an issue a year or
so ago with a boot error with mdmonitor due to my failure to provide MAILADDR in
/etc/mdadm.com, but that has long since been corrected:

# cat /etc/mdadm.conf
DEVICE partitions
ARRAY /dev/md0 metadata=1.2 name=archiso:0 UUID=1b67f2d4:4911f2c5:469f9dcf:315814ce
ARRAY /dev/md1 metadata=1.2 name=archiso:1 UUID=0542c5c9:3802b256:32e97884:a2e49f53
ARRAY /dev/md2 metadata=1.2 name=archiso:2 UUID=812e8f85:0c4efbef:a0c02f49:215df35e
ARRAY /dev/md3 metadata=1.2 name=archiso:3 UUID=80a3bf76:e6421b06:6edb2a88:741e8b6f
MAILADDR david@mydomain.com
PROGRAM /usr/sbin/handle-mdadm-events

  So following the rabbit trail further, I check and there is no
/usr/lib/systemd/scripts/mdadm_env.sh on my system and it is not provided as
part of the mdadm package:

# pacman -Ql mdadm
mdadm /etc/mdadm.conf
mdadm /usr/bin/mdadm
mdadm /usr/bin/mdassemble
mdadm /usr/bin/mdmon
mdadm /usr/lib/initcpio/hooks/mdadm
mdadm /usr/lib/initcpio/install/mdadm
mdadm /usr/lib/initcpio/install/mdadm_udev
mdadm /usr/lib/systemd/system-shutdown/mdadm.shutdown
mdadm /usr/lib/systemd/system/mdadm-grow-continue@.service
mdadm /usr/lib/systemd/system/mdadm-last-resort@.service
mdadm /usr/lib/systemd/system/mdadm-last-resort@.timer
mdadm /usr/lib/systemd/system/mdmon@.service
mdadm /usr/lib/systemd/system/mdmonitor.service
mdadm /usr/lib/udev/rules.d/63-md-raid-arrays.rules
mdadm /usr/lib/udev/rules.d/64-md-raid-assembly.rules
<snip man pages>

  However, the mdmonitor.service file is certainly looking for one:

# cat /usr/lib/systemd/system/mdmonitor.service

#  This file is part of mdadm.
#
#  mdadm is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.

[Unit]
Description=MD array monitor
DefaultDependencies=no

[Service]
Environment=  MDADM_MONITOR_ARGS=--scan
EnvironmentFile=-/run/sysconfig/mdadm
ExecStartPre=-/usr/lib/systemd/scripts/mdadm_env.sh
ExecStart=/sbin/mdadm --monitor $MDADM_MONITOR_ARGS

  Further, there isn't even a /run/sysconfig directory on Arch (which looks more
SuSE'esque). Checking the status, mdmonitor is happily running and doing it's job:

# sc status mdmonitor
● mdmonitor.service - MD array monitor
   Loaded: loaded (/usr/lib/systemd/system/mdmonitor.service; static; vendor
preset: disabled)
   Active: active (running) since Fri 2016-05-27 08:32:26 CDT; 1 weeks 2 days ago
  Process: 353 ExecStartPre=/usr/lib/systemd/scripts/mdadm_env.sh (code=exited,
status=203/EXEC)
 Main PID: 378 (mdadm)
    Tasks: 1 (limit: 512)
   CGroup: /system.slice/mdmonitor.service
           └─378 /sbin/mdadm --monitor --scan

May 27 08:32:26 valkyrie systemd[1]: Starting MD array monitor...
May 27 08:32:26 valkyrie systemd[1]: Started MD array monitor.

  So the issue here is "is this a missing file from the Arch packaging of
mdadm?", "or is there just an oversight in the service file?" I apoligize if
this has been asked before, searching, I don't find anything directly. So is
this an Arch issue or a mdadm issue?

  I know it's not a big issue, but I'd like to clean up the boot message
properly. What say the devs?


-- 
David C. Rankin, J.D.,P.E.
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