Am 26.02.2016 um 10:57 schrieb Graham Leggett:
Hi all, I am trying to come up with a vanilla systemd unit file so that our RPM packaging contains a sensible startup on systemd environments, but I’m struggling. With the unit file below the “systemctl restart httpd” command hangs. Usually the server starts fine, but then the server is stopped by something a short while afterwards for no clear reason. According to google the hang in systemctl happens for many people, systemctl is waiting for a message that never comes, but the causes are widely varied and I am struggling to figure out exactly what is wrong. What I am trying to achieve is a simple daemon start, with no mod_systemd (which isn’t part of core httpd). Can anyone point out any obvious errors in the following?
i would recommend the following which is in use here starting in 2012 on all servers, with the no-forking the mainpid for systemd is clear and by stop the service all processes get a SIGTERM from systemd
that works also with mpm-prefork perfectly (we use prefork)while i understand the "give httpd some time to finish gracefully" in case of a hard restart it has the drawback that new connections are not accepted for that time-period and so it has negative impact
in case of a SIGTERM the daemon is supposed to do a clean shutdown anyways [Service] Type=simple EnvironmentFile=-/etc/sysconfig/httpd ExecStart=/usr/sbin/httpd $OPTIONS -D FOREGROUND ExecReload=/usr/sbin/httpd $OPTIONS -k graceful Restart=always RestartSec=1
[Unit]
Description=The Apache HTTP Server
After=network.target remote-fs.target nss-lookup.target
Documentation=man:httpd(8)
Documentation=man:apachectl(8)
[Service]
Type=forking
PIDFile=/var/run/httpd.pid
EnvironmentFile=/etc/sysconfig/httpd
ExecStart=/usr/sbin/httpd $OPTIONS
ExecReload=/usr/sbin/httpd $OPTIONS -k graceful
ExecStop=/bin/kill -WINCH ${MAINPID}
# We want systemd to give httpd some time to finish gracefully, but still want
# it to kill httpd after TimeoutStopSec if something went wrong during the
# graceful stop. Normally, Systemd sends SIGTERM signal right after the
# ExecStop, which would kill httpd. We are sending useless SIGCONT here to give
# httpd time to finish.
KillSignal=SIGCONT
PrivateTmp=true
[Install]
WantedBy=multi-user.target
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