[Bug 1642402] [NEW] [ubuntu 16.10] mdmonitor.service does not use syslog or environment file

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Previously, the standard place to configure mdadm monitoring behavior
has been /etc/default/mdadm, where DAEMON_OPTIONS and so forth can be
set. By default these options include "--syslog", and often people add a
"--test" option there so that they get a test notification when the
monitoring daemon restarts.

Currently, the mdmonitor.service unit does not load /etc/default/mdadm
or provide any other mechanism for customization:

> cat /lib/systemd/system/mdmonitor.service
# [...snip...]

[Unit]
Description=MD array monitor
DefaultDependencies=no

[Service]
ExecStart=/sbin/mdadm --monitor --scan

Also, as you can see the monitor no longer defaults to using --syslog; I
don't know if that was intended as part of the change to systemd or was
an accident. In any case, it appears that the monitoring results aren't
logged to any system log.

Moreover, there's no ability for the user to further customize the mdadm
arguments.

Should "EnvironmentFile=-/etc/default/mdadm" be added to the service
description and DAEMON_OPTIONS passed along to mdadm? Should some other
option be used for configuration? Currently there's a lot of advice on
the internet about using /etc/default/mdadm to configure monitoring, but
that doing any of that now seems to be a no-op.

Versions: 
I'm using a fully updated kubuntu 16.10 install.

mdadm --version
mdadm - v3.4 - 28th January 2016

uname -provism
Linux 4.8.0-27-generic #29-Ubuntu SMP Thu Oct 20 21:03:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

** Affects: mdadm
     Importance: Undecided
         Status: New

** Affects: mdadm (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bionic
-- 
[ubuntu 16.10] mdmonitor.service does not use syslog or environment file
https://bugs.launchpad.net/bugs/1642402
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