Startup/Shutdown email notification

Hello Everyone,

I am using OMV 5 as a backup server for daily automated backups. And it is doing an awesome job. Thanks for everyone contributing to this great project.

I would like to receive an email notification once OMV startup and shutdown. Any ideas how to do this in clean way?
I already configured SMTP for other notifications using OMV webGUI, and I can receive all other notifications. The only extra I need is to receive an email upon startup and shutdown.

Thanks in advance

Zitat von macom

Mail at startup can be done by adding a scheduled job in the GUI of OMV with "time of exection" At Reboot.

Command:

echo "Server has restarted "`hostname` | mail -s "rebooted" jane.doe@gmail.com.

Mail at shutdown is not so simple AFAIK, but you will find some ways using google.

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Thanks for your reply. I tried to do a systemd service to send the shutdown email. But it is never sent on time because the message goes to queue first. And I am unable to find a way to make this service execute that script before stopping postfix

Zitat von votdev

You can define dependencies in unit files.

Thanks, I will try that

I managed to achieve what I wanted. Here is how..

1- Create a user with privileges enough to send mail

2- Create a service file nano /etc/systemd/system/email-notifications.service

[Unit]
Description=Startup/Shutdown Email Notifications
After=postfix.service

[Service]
Type=exec
User=myadmin
ExecStart=/usr/bin/bash -c '/usr/bin/echo -e "`hostname` Started `date`" | /usr/bin/mail -s "`hostname` Started on `date`" my@email.me'
ExecStop=/usr/bin/bash -c '/usr/bin/echo -e "`hostname` Shutdown `date`" | /usr/bin/mail -s "`hostname` Shutdown on `date`" my@email.me' ; /usr/bin/sleep 5
RemainAfterExit=yes

[Install]
WantedBy=multi-user.target

3- Enable the created service systemctl enable email-notifications.service

Notes/Findings:

• Those steps assumes you already configured email configurations in OMV webGUI
• That service file worked for me after several try/error attempts. It is not guaranteed that it would work for everyone else
• I think It needs tweaking (I am not familiar enough with systemd)
• systemd is very fast in stopping/killing services/processes during shutdown. Thats why 5 seconds delay is needed
• The main issue/challenge is that postfix doesn't send emails currently in queue before it gets stopped by systemd
• systemd is complicated and messing with it is likely going to break your OMV installation. I suggest reading its manual pages carefully
• It would be great if the function of shutdown notification be added in OMV webGUI

Thanks for all your hints and for OMV