Segfault during pre-flight check

[Thomas Guyot-Sionnest]

Excellent, it works! Thanks for fixing it that fast!

Since we're at it, I'm wondering if you're willing to look at the command
file processing code. I reported some time ago that Nagios were randomly
skipping some passive checks since I set up around 60 hosts to report trough
nsca (Using a tcpwarper) at the same time. Andreas Ericsson replied it was
due to the pipe filling up, which I hardly doubt. From my testing the pipe
start to block at around 1000-1500 passive checks results sent at the same
time, and even if it blocks it shouldn't miss any check (am I wrong on that
assumption?).

If I set max_check_attempts to 1 I get a page every 2-3 hours on average.

Thanks again,

Thomas

> -----Original Message-----
> From: Ethan Galstad [mailto:nagios at nagios.org] 
> Sent: July 6, 2006 16:58
> To: nagios-devel at lists.sourceforge.net
> Cc: Thomas Guyot-Sionnest
> Subject: Re: [Nagios-devel] Segfault during pre-flight check
> 
> Thomas, et al -
> 
> I think I've found and fixed this bug.  I just posted a 
> proposed fix to 
> CVS a few moments ago.  A new CVS snapshot should be 
> available in about 
> 10 minutes from the following URL:
> 
> http://nagios.sourceforge.net/download/cvs/
> 
> When you get a chance, can you grab the latest nagios-2-x-cvs 
> tarball, 
> compile it, and see if it fixes the segfault?  Thanks!
> 
> Thomas Guyot-Sionnest wrote:
> > Hi,
> > 
> > I'm maintaining a pretty big nagios setup (about 60 hosts/ 
> 600 services and
> > plan to grow that by 3-4 times). Most of the config is 
> using templates to
> > save config lines and maintenance time. Every host has an 
> extinfo (one
> > definition for each hostsgroup).
> > 
> > Now I started adding services extinfos to do some fancy 
> things with e-mail
> > pages, and ran in a strange segfault bug. To explain it 
> better I'll give an
> > overview of my config.
> > 
> > templates.cfg: This defines all basic hosts, services and 
> service extinfo
> > templates.
> > 
> > Ex:
> > 
> > define service {
> >   name                  generic_service
> >   max_check_attempts    3
> >   normal_check_interval 300
> >   retry_check_interval  60
> >   check_period          24x7
> >   notification_interval 600
> >   notification_period   24x7
> >   notification_options  c,w,r
> >   contact_groups        admin
> >   register              0
> > }
> > 
> > define service {
> >   hostgroup_name admin,license,public,web
> >   use            generic_service
> >   name           dynamic_service
> >   register 0
> > }
> > 
> > services.cfg: This defines services based on template above.
> > 
> > For ex.:
> > 
> > define service {
> >   host_name           nagios.example.com
> >   service_description HTTP
> >   servicegroups       http_svc
> >   check_command       check_http!$HOSTADDRESS$
> >   use                 dynamic_service
> > }
> > 
> > Will add this services for all hosts in hostsgroups 
> admin,license,public,web 
> > PLUS host nagios.example.com
> > 
> > So far this works fine. Now I add in templates.cfg (Note 
> that I removed the
> > ampersand from "illegal_macro_output_chars" for this to work) :
> > 
> > define serviceextinfo {
> >   name                generic_service_ext
> >   action_url
> > 
> https://nagios.example.com/cgi-bin/extinfo.cgi?type=2&host=$HO
> STNAME$&servic
> > e=$SERVICEDESC$
> >   register            0
> > }
> > 
> > define serviceextinfo {
> >   hostgroup_name admin,license,public,web
> >   use            generic_service_ext
> >   name           dynamic_service_ext
> >   register 0
> > }
> > 
> > And in services.cfg:
> > 
> > define serviceextinfo {
> >   host_name           nagios.example.com
> >   service_description HTTP
> >   use                 dynamic_service_ext
> > }
> > 
> > Then run:
> > 
> > # nagios -v /etc/nagios/nagios.cfg
> > 
> > Nagios 2.4
> > Copyright (c) 1999-2006 Ethan Galstad (http://www.nagios.org)
> > Last Modified: 05-31-2006
> > License: GPL
> > 
> > Reading configuration data...
> > 
> > Segmentation fault
> > 
> > 
> > Now, interesting thing here, If I move "hostgroup_name
> > admin,license,public,web" from the template to the 
> registered service
> > extinfo, it works!
> > 
> > templates.cfg:
> > 
> > define serviceextinfo {
> >   use            generic_service_ext
> >   name           dynamic_service_ext
> >   register 0
> > }
> > 
> > services.cfg:
> > 
> > define serviceextinfo {
> >   host_name           nagios.example.com
> >   hostgroup_name      admin,license,public,web
> >   service_description HTTP
> >   use                 dynamic_service_ext
> > }
> > 
> > 
> > root at josianne:/etc/nagios/cfg# nagios -v /etc/nagios/nagios.cfg
> > 
> > Nagios 2.4
> > Copyright (c) 1999-2006 Ethan Galstad (http://www.nagios.org)
> > Last Modified: 05-31-2006
> > License: GPL
> > 
> > Reading configuration data...
> > 
> > Running pre-flight check on configuration data...
> > 
> > Checking services...
> >         Checked 597 services.
> > Checking hosts...
> >         Checked 64 hosts.
> > Checking host groups...
> >         Checked 10 host groups.
> > Checking service groups...
> >         Checked 4 service groups.
> > Checking contacts...
> >         Checked 7 contacts.
> > Checking contact groups...
> >         Checked 4 contact groups.
> > Checking service escalations...
> >         Checked 0 service escalations.
> > Checking service dependencies...
> >         Checked 71 service dependencies.
> > Checking host escalations...
> >         Checked 0 host escalations.
> > Checking host dependencies...
> >         Checked 0 host dependencies.
> > Checking commands...
> >         Checked 59 commands.
> > Checking time periods...
> >         Checked 4 time periods.
> > Checking extended host info definitions...
> >         Checked 64 extended host info definitions.
> > Checking extended service info definitions...
> >         Checked 132 extended service info definitions.
> > Checking for circular paths between hosts...
> > Checking for circular host and service dependencies...
> > Checking global event handlers...
> > Checking obsessive compulsive processor commands...
> > Checking misc settings...
> > 
> > Total Warnings: 0
> > Total Errors:   0
> > 
> > Things look okay - No serious problems were detected during 
> the pre-flight
> > check
> > 
> > 
> > I'm sorry I didn't have time to cleanup all the config . 
> I'm currently
> > setting another nagios box, so if I run into this problem 
> at the very
> > beginning I'll keep that config and send it over. I also 
> tried to get a core
> > dump but it didn't worked, I'm not sure if I need to enable 
> some options at
> > compile time...
> > 
> > Thanks
> > 
> > Thomas
> > 
> 
> 
> 
> Ethan Galstad,
> Nagios Developer
> ---
> Email: nagios at nagios.org
> Website: http://www.nagios.org
> 
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