On 10/09/2014 02:26 PM, Lennart Poettering wrote:
On Thu, 09.10.14 12:14, Jóhann B. Guðmundsson ([email protected]) wrote:
On 10/08/2014 11:41 PM, Lennart Poettering wrote:
TODO list to allow services also when they have no ExecStart= but with
an ExecStop=, but this has not been implemented yet.
What's the usecase for this behaviour?
Precisely cases like the one described earlier in this thread: when
you want to run something only at shutdown, properly ordered against
other units that are also shut down.
To me that already works just fine.
[Unit]
Description=My Shutdown Test
Before=shutdown.target
DefaultDependencies=no
[Service]
Type=oneshot
ExecStart=/bin/systemd-cat -t "SHUTDOWN" /bin/echo "Systemd shutdown test-2"
[Install]
WantedBy=shutdown.target
journalctl SYSLOG_IDENTIFIER=SHUTDOWN
-- Logs begin at Thu 2013-10-24 11:47:22 GMT, end at Thu 2014-10-09
20:00:17 GMT. --
Oct 09 19:57:51 localhost.localdomain SHUTDOWN[1968]: Systemd shutdown
test-1
-- Reboot --
Oct 09 19:59:19 localhost.localdomain SHUTDOWN[1898]: Systemd shutdown
test-2
( the former log is from when I initially tested the unit before reboot )
If I wanted to order it after an service I added After=httpd.service
[Unit]
Description=My Shutdown Test
Before=shutdown.target
After=httpd.service
DefaultDependencies=no
[Service]
Type=oneshot
ExecStart=/bin/systemd-cat -t "SHUTDOWN" /bin/echo "Systemd shutdown test-3"
[Install]
WantedBy=shutdown.target
In my test I added this line to httpd.service
ExecStop=/bin/systemd-cat -t "SHUTDOWN" /bin/echo "Systemd shutdown
test-3 Apache Stopped"
Then I rebooted and as you can see things seem to work perfectly as in
the test case was stopped after apache had stopped make the shutdown
order correct
# journalctl SYSLOG_IDENTIFIER=SHUTDOWN
-- Reboot --
Oct 09 20:16:37 localhost.localdomain SHUTDOWN[1972]: Systemd shutdown
test-3 Apache Stopped
Oct 09 20:16:38 localhost.localdomain SHUTDOWN[1985]: Systemd shutdown
test-3
What I dont understand what's the usecase for somekind of ExecStop=
modfications, why do we need to do that?
JBG
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