content on the web won't change even nagios process has been killed

Ran Li Ran.Li at sprint-canada.com
Fri Jul 29 20:29:45 CEST 2005


Hi List,
 
I did another test,
 
1. kill the nagios process
2. visit http://my_ip/nagios -> normal
3. click Monitoring -> Service Detail -> normal , same page is showed
before the process was killed
4. mv ../nagios/var/status.dat ../nagios/var/status.dat.old
5. visit http://my_ip/nagios -> normal
6. click Monitoring -> Service Detail -> this time I got

Whoops!


Error: Could not read host and service status information!

The most common cause of this error message (especially for new users),
is the fact that Nagios is not actually running. If Nagios is indeed not
running, this is a normal error message. It simply indicates that the
CGIs could not obtain the current status of hosts and services that are
being monitored. If you've just installed things, make sure you read the
documentation on starting Nagios. 

Some other things ......

7. start the nagios process, everything went back to normal

is this status.dat suppose to be deleted after the nagios is off?

please comment, thanks.

Regards,

-tea

 

	-----Original Message-----
	From: Ran Li 
	Sent: Thursday, July 28, 2005 4:54 PM
	To: 'Scott Sugar'; nagios-users at lists.sourceforge.net
	Subject: RE: [Nagios-users] content on the web won't change even
nagios process has been killed
	
	
	Hi Scott and all,
	 
	Thanks for the reply.
	 
	before I did could see the error page when without nagios
running, how come not be able to right now. 
	 
	yes, the process 3548 is the only nagios process. 
	 
	I m afraid of my broswer's caching so I tried to visit the web
page from another computer which never visit the page before, know what,
It shows the same normal page when WITHOUT nagios running.
	 
	Anybody met this problem before? please comment. Thanks.
	 
	Regards,
	 
	-tea
	 

		-----Original Message-----
		From: Scott Sugar [mailto:ssugar at proserveit.com] 
		Sent: Thursday, July 28, 2005 4:07 PM
		To: Ran Li; nagios-users at lists.sourceforge.net
		Subject: RE: [Nagios-users] content on the web won't
change even nagios process has been killed
		
		
		That doesnt seem normal... im assuming that there are no
other nagios process' once you kill 3548?
		 
		If there are no instances of nagios running, you should
not be able to view the nagios web interface... you should get some
error message that says something along the lines of:
		 
		Error cannot view pages, nagios may not be running... or
something like that...
		 
		Im not too sure if there could be some caching going
on... maybe your browser is running through a proxy?.... i dont think
that will make a difference though if you try and refresh the page....
		 
		Anyone else have an idea?
		 
		scott

  _____  

		From: Ran Li [mailto:Ran.Li at sprint-canada.com]
		Sent: Thu 7/28/2005 3:15 PM
		To: Scott Sugar; nagios-users at lists.sourceforge.net
		Subject: RE: [Nagios-users] content on the web won't
change even nagios process has been killed
		
		
		Hi Scott and all,
		 
		on the step 4, I killed the nagios process 
		 
		(just a sample)
		 
		#ps -ef | grep nagios
		nagios    3548 31209  0 Jul27 pts/2    00:00:00 ./nagios
../etc/nagios.cfg
		 
		#kill 3548
		 
		the web content I mentioned is under the Monitoring
category -> Service Detail, where I can see every service 's status on
each host. I m using Apache2. I even tried to restart the http service,
but won't work either, web shows every service 's status is OK, while
nagios is not running. Normal?
		 
		I think I m using active check not passive one, the
parameter check_freshness is set to 0 in the configuration file.
		 
		nagios server (nagios/web interface/plugins/check_nrpe)
		        |
		    /       \
		host1    host2 (nrpe/plugins)
		 
		 
		Thanks and regards,
		 
		-tea
		 

			-----Original Message-----
			From: Scott Sugar [mailto:ssugar at proserveit.com]

			Sent: Thursday, July 28, 2005 2:37 PM
			To: Ran Li; nagios-users at lists.sourceforge.net
			Subject: RE: [Nagios-users] content on the web
won't change even nagios process has been killed
			
			
			Which nagios server did you shutdown in step 4? 
			If you shutdown the remote one, the central one
will not know that the remote machine is no longer sending passive
checks unless you set the check_freshness command on the central server.
			Also which web interface are you looking at?
			 
			scott

  _____  

			From: nagios-users-admin at lists.sourceforge.net
on behalf of Ran Li
			Sent: Thu 7/28/2005 2:45 PM
			To: nagios-users at lists.sourceforge.net
			Subject: [Nagios-users] content on the web won't
change even nagios process has been killed
			
			
			Hi all,
			 
			Please advise which parameter(s) exactly
control(s) this.
			 
			situation is
			 
			1. after the configuration, I can monitor the
services on the local and remote hosts
			2. when I made the changes on the configuration,
I need to restart the nagios process 
			3. for the first couple of times when I
restarted the nagiso process, the service that being monitored, their
status on the web would show Pending first and then turned to green one
by one ... which is OK
			4. I leave it there for a night, this morning,
when I shutdown the nagios, found the the content on the web is still
the same, which all services are still OK/green even without nagios.
			5. I tried to shutdown some of the services as
well, but the content still would not be changed. 
			6. then I started the nagios again, this time it
would refresh the status and tells the services that I shutdown are
CRITICAL/Red.
			7. I killed the nagios process again, everything
stays the same. 
			 
			is this configuration on the nagios or on the
apache? some place cache it?
			 
			Thanks and regards,
			 
			-tea

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