Public bug reported:
-- Problem Description --
Upstart can not see a service/job/process that has been started and running by
someone else. Old style init.d/systemd fully/partially handle start/stop
correctly (on other Linux systems without Upstart), no matter who started the
process.
Our PMLinux collecting agent "daemon_PMLnx" was designed to start/run by
root with any means, such as crontab, inittab, service, or even command
line at a terminal. The program itself will quit immediately at the
beginning if finds the process already running.
Generally, we prefer to organize PMLinux as a service, plus create a
start hook in the crontab to run "daemon_PMLnx" at 3am every day, in
order to guarantee a restart won't be forgot if someone ever stopped the
job.
Here are some command outputs from Ubuntu/Upstart:
# uname -a
Linux ubuntu 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:09:21 UTC 2014
ppc64le ppc64le ppc64le GNU/Linux
# dpkg -l upstart
Name Version Architecture Description
-===========-================-=============-========================
ii upstart 1.12.1-0ubuntu4 ppc64el event-based init daemon
# ps -ef | grep -e PMLnx$ -e CRON$
root 10263 771 0 17:59 ? 00:00:00 CRON
root 10264 10263 0 17:59 ? 00:00:00 /bin/sh -c
/var/perf/pm/bin/daemon_PMLnx (bug!)
root 10265 10264 0 17:59 ? 00:00:00 /var/perf/pm/bin/daemon_PMLnx
# start PMLinux
PMLinux stop/waiting <--- bad!
# status PMLinux
PMLinux stop/waiting <--- bad!
# stop PMLinux
stop: Unknown instance: <--- bad!
# kill -2 10265
# start PMLinux
PMLinux start/running, process 10562
# ps -ef | grep -e PMLnx$
root 10562 1 0 19:49 ? 00:00:00 /var/perf/pm/bin/daemon_PMLnx
# start PMLinux
start: Job is already running: PMLinux
# stop PMLinux
PMLinux stop/waiting
# stop PMLinux
stop: Unknown instance:
# cat /etc/init/PMLinux.conf
# daemon_PMLnx - Collecting Agent of IBM Performance Management for Power Linux
(PMLinux)
#
# daemon_PMLnx collects PMLinux data at periodic scheduled times
# working HOME directory - /var/perf/pm
description "IBM PMLinux collecting daemon"
author "IBM PMLinux Team, Rochester, USA"
start on runlevel [2345]
stop on runlevel [!2345]
# console output
# not works as expected: output to the working terminal (instead of
system console)
pre-start script
unset myErrMSG
if [ ! -x /var/perf/pm/bin/daemon_PMLnx ]; then
export myErrMSG='Daemon programs disappeared; please re-install
ibmPMLinux'
# elif ps -C daemon_PMLnx >/dev/null; then
# export myErrMSG='PMLinux collecting daemon is already running!'
elif [ ! -L /var/adm/perfmgr ] || [ ! -d /var/adm/perfmgr ]; then
export myErrMSG='PMLinux was NOT enabled; Please run
"config.PMLnx" to activate'
fi
if [ -n "$myErrMSG" ]; then
echo -n "`date +'%D %T'` "; stop;
echo "`date +'%D %T'` $myErrMSG"; exit 0
fi
end script
post-start script
if ps -C daemon_PMLnx >/dev/null; then
echo "`date +'%D %T'` PMLinux collecting daemon running..."
else
echo "`date +'%D %T'` FAILED: Could NOT start PMLinux
collecting daemon!!!"
fi
end script
post-stop script
echo "`date +'%D %T'` PMLinux collecting daemon stopped."
end script
exec /var/perf/pm/bin/daemon_PMLnx
The attachment is a screenshot to demonstrate an old init under a
different distro 1 that can find/stop PMLinux daemon started from user
terminal.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: architecture-ppc64le bugnameltc-112942 severity-major
** Tags added: architecture-ppc64le bugnameltc-112942 severity-major
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https://bugs.launchpad.net/bugs/1337407
Title:
Upstart can NOT handle service/job started by others
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