[solved] Problems with systems processes not restarting

[linuxdad]

I have converted a few /etc/inittab processes to the systems format (or so I thought), these processes have been working fine, until a recent issue, which I am uncertain about.

So I started to investigate two particular issues which are now part of the systems environment:

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systemctl --all | grep pop
poprelay-iptc.service     loaded failed   failed        POP Relay info for remote Sendmail communications.
poprelay.service          loaded failed   failed        POP Relay info for remote Sendmail communications.


So I attempted to restart the first service.

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systemctl start poprelay-itpc.service
Failed to issue method call: Unit poprelay-itpc.service failed to load: No such file or directory. See system logs and 'systemctl status poprelay-itpc.service' for details.


This brings me to the status:

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systemctl status poprelay-itpc.service
poprelay-itpc.service
     Loaded: error (Reason: No such file or directory)
     Active: inactive (dead)

Interestingly enough, I challenged the error message:

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find /etc -name "poprelay*" -print
/etc/systemd/system/multi-user.target.wants/poprelay-iptc.service
/etc/systemd/system/multi-user.target.wants/poprelay.service
/etc/systemd/system/poprelay-iptc.service
/etc/systemd/system/poprelay.service
/etc/mail/poprelay.conf
/etc/mail/mail/poprelay.conf


Hmm, that looks like the files are there, better check to see if I can execute the process manually:

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more /etc/systemd/system/multi-user.target.wants/poprelay-iptc.service
[Unit]
Description=POP Relay info for remote Sendmail communications.
 
[Service]
ExecStart=/sysadm/scripts/poprelayd-ABS-iptc.pl -dn
Restart=always
 
[Install]
WantedBy=multi-user.target


Hmm, looks like I can start this manually:

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 ps ax | grep -i pop
12394 pts/0    S      0:00 /usr/bin/perl /sysadm/scripts/poprelayd-ABS-iptc.pl -dn


Can anyone explain what is happening here?

Thank you.

[barjac]

Your unit file should be placed in /lib/systemd/system/ not in /etc
Systemd will look after the rest based on the content of the unit file.

[doktor5000]

Your unit file should be placed in /lib/systemd/system/ not in /etc

Nope, not really. /etc is for the system administrator, /usr carries all those that come with the system, /lib is only a symlink to /usr/lib, FWIW.

[barjac]

Sorry, I meant /usr/lib/systemd/system/
as in:

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$ rpm --eval %{_unitdir}
/usr/lib/systemd/system

[linuxdad]

I do not understand what the difference is, or why this was working for more than three months!

So the question is, where does the poprelay-iptc.service configuration file go? (It was previously working in /etc/systemd/system for sometime.) Is is required to go to the /usr/lib/systemd/system tree? When did this change?

[linuxdad]

Wow, I do not understand what changed, but after copying the service definitions to /usr/lib/systemd/system, then enabling and then starting, the processes are starting again.

Thank you.

[barjac]

Well I am not well versed in systemd magic, however all the packages that I maintain that use unit files install them using the %{_unitdir} macro. I have never put anything related to unit files under /etc/systemd.
If you look in /etc/systemd/ all the 'files' are in fact symlinks which are (I'm guessing) created by systemd in response to the unit files in %{_unitdir} when 'systemctl --system daemon-reload' is run.
Others will no doubt be able to explain it more accurately, but I'm glad it's now working for you

[linuxdad]

Thank you again this forum has once again saved the day.