[Bug 236373] [NEW] '/etc/init.d/nagios2 reload' causes nagios to exit (sends SIGTERM not SIGHUP)

[Matt Brown]

Public bug reported:

Binary package hint: nagios2

The init script for nagios kills nagios when the user requests the
configuration to be reloaded. Nagios logs that it has received a SIGTERM
rather than the expected SIGHUP.

This appears to be a bug in the nagios2 (2.11-1ubuntu1) packages
interaction with the lsb-base package in Hardy. This bug is not present
in Debian with the 2.11-1 version of the nagios package.

The nagios init script calls killproc from the lsb-base scripts, passing
it "1" (HUP) as the signal to send to nagios, the lsb-base scripts
convert this to a TERM instead of a HUP.

I do not know if this is a bug in the lsb-base scripts, or the scripts
being called incorrectly by the nagios init script, so I have filed this
bug on Nagios as I suspect it is the more likely candidate to be at
fault, it will be amazing if such a large bug in lsb-release managed to
slip through the QA for an LTS release!

To reproduce the bug on a Hardy system you can do the following:

1) Install nagios2
2) Start nagios, check that it is running, tail /var/log/nagios2/nagios.log
3) In another console run, /etc/init.d/nagios2 reload
4) Observe the following lines in the log file

[1212255142] Nagios 2.11 starting... (PID=24439)
[1212255142] LOG VERSION: 2.0
[1212255142] Finished daemonizing... (New PID=24440)
< reload command is executed at this point>
[1212256400] Caught SIGTERM, shutting down...
[1212256401] Successfully shutdown... (PID=24440)

I have attached a patch that works around this issue by modifying the
init script to send a HUP directly rather than using the killproc method
from the lsb-base scripts. When this patch is applied the correct
behaviour is observed in the nagios log file after executing
/etc/init.d/nagios2 reload

[1212256426] Nagios 2.11 starting... (PID=27947)
[1212256426] LOG VERSION: 2.0
[1212256427] Finished daemonizing... (New PID=27948)
< reload command is executed at this point>
[1212257232] Caught SIGHUP, restarting...
[1212257232] Nagios 2.11 starting... (PID=27948)
[1212257232] LOG VERSION: 2.0

** Affects: nagios2 (Ubuntu)
     Importance: Undecided
         Status: New

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'/etc/init.d/nagios2 reload' causes nagios to exit (sends SIGTERM not SIGHUP)
https://bugs.launchpad.net/bugs/236373
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