[systemd-devel] Antw: [EXT] Re: Help understanding "notify" (SLES15 SP3 restarting smartd)

[Ulrich Windl]

>>> Mantas Mikulenas <grawity at gmail.com> schrieb am 10.02.2022 um 10:34 in
Nachricht
<CAPWNY8Wi94qqXUM5gPzuAWS8ffCFk=VeTebZ3vtN_a8M+oJgMw at mail.gmail.com>:
> On Thu, Feb 10, 2022 at 11:21 AM Ulrich Windl <
> Ulrich.Windl at rz.uni-regensburg.de> wrote:
> 
>> Hi!
>>
>> I have a support case for SLES15 SP3 (systemd-246.16-7.33.1.x86_64) where
>> smartd is restarted for no obvious reason. Support says everything is
fine,
>> but I disagree.
>> Specifically smartd.service uses:
>>
>> [Service]
>> Type=notify
>> EnvironmentFile=-/var/lib/smartmontools/smartd_opts
>> ExecStart=/usr/sbin/smartd -n $smartd_opts
>> ExecReload=/bin/kill -HUP $MAINPID
>>
>> And mostly I wonder to what types of changes "notify" does react.
>>
> 
> None. It's not an activation mechanism and not a configuration monitoring
> mechanism – it's a readiness indication mechanism.
> 
> Type=notify expects the service to send a message to a Unix socket (at
> $NOTIFY_SOCKET) indicating that it is "ready". (And optionally some custom
> text to show in 'systemctl status'.)

Mantas,

thanks for explaining; obviously I was wrong. But still: How can I find out
why the smartd.service restarts?

Regards,
Ulrich

> 
> -- 
> Mantas Mikulėnas