i'm moving a group of systemd-controlled server services off of the critical boot path, on Fedora 39.
i build/package the services myself, from .spec (mock or COPR), and need to adapt the specs' systemd-rpm-macros usage.
to get them off the critial path, i've grouped the service in a unit.target, controlled by a unit.timer,
cat /etc/systemd/system/daemon{A,B,C}.service
...
[Install]
- WantedBy=graphical.target
+ Also=daemon-group.timer
cat /etc/systemd/system/daemon-group.target
[Unit]
Description=daemon-group target
Wants=daemonA.service daemonB.service daemonC.service
After=daemonA.service daemonB.service daemonC.service
[Install]
Also=daemon-group.timer
cat /etc/systemd/system/daemon-group.timer
[Unit]
Description=startup daemon-group
After=syslog.target network-online.target
[Timer]
OnActiveSec=1s
Unit=daemon-group.target
[Install]
WantedBy=timers.target
then
systemctl enable --now daemon-group.timer
as intended, the timer unit now controls group start/stop, with ordering deps handled within each daemon{A,B,C}.service unit,
systemctl status daemonA daemonB daemonC | grep indirect
Loaded: loaded (/etc/systemd/system/daemonA.service; indirect; preset: disabled)
Loaded: loaded (/etc/systemd/system/daemonB.service; indirect; preset: disabled)
Loaded: loaded (/etc/systemd/system/daemonC.service; indirect; preset: disabled)
, not via typical direct systemctl of the individual units.
where, e.g.,
cat /usr/lib/rpm/macros.d/macros.systemd
...
%systemd_postun_with_restart() \
%{expand:%%{?__systemd_someargs_%#:%%__systemd_someargs_%# systemd_postun_with_restart}} \
if [ $1 -ge 1 ] && [ -x "/usr/lib/systemd/systemd-update-helper" ]; then \
# Package upgrade, not uninstall \
/usr/lib/systemd/systemd-update-helper mark-restart-system-units %{?*} || : \
fi \
%{nil}
...
cat /usr/lib/systemd/systemd-update-helper
...
mark-restart-system-units)
[ -d /run/systemd/system ] || exit 0
for unit in "$@"; do
systemctl set-property "$unit" Markers=+needs-restart &
done
wait
;;
...
with this setup, @ shell,
systemctl stop daemon<X>.service
correctly stops a single service.
but
systemctl (re)start daemon<X>.service
fails to release back to prompt
otoh,
systemctl stop daemon<X>.service
systemctl restart daemon-group.timer
does. but, appears to restart all services ref'd in the timer group.
on pkg upgrade, i need to properly handle the service/timer controls in the spec.
the original daemon{A,B,C}.spec has systemd-rpm-macros in place for pre-/post install handling,
...
BuildRequires: systemd
BuildRequires: systemd-rpm-macros
%{?systemd_requires}
...
%post
%systemd_post daemon<X>.service
%preun
%systemd_preun daemon<X>.service
%postun
%systemd_postun_with_restart daemon<X>.service
...
what's correct systemd unit control usage in this case?
keep post/pre macro invocations referencing the daemon<X>.service ?
switch to mixed/sole macro control of daemon-group.timer?
or, can't use the macros in this case, and have to use explicit manual control?
--
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