I think i foregot to explain a crucial point that nagios is running in my
router not in my
machine. If i had told u my machine, then I really apolagise for stealing
your precious
time. And is there anyway that I can trigger the check_uptime (plugin
written by me)
all the time when the router is up???. If so please do tell me. If the
router is down and
nagios doesnt run then its ok for me. Since that is a different issue. But
from your reply
I came to understand that check_uptime will be called for the first time
when the nagios
is started and then if any of the services fails then again the check_uptime
is called.
Sujith
Bangalore.
On 2/28/07, Andy Shellam (Mailing Lists) <
[EMAIL PROTECTED]> wrote:
Again, as I and Patrick have said, your host's check_command is only
getting run when a service is deemed to have problems.
You're getting the difference in the uptime output in Nagios and the
console because Nagios hasn't run the uptime command for the host for over a
day.
If you're not retaining status information, then when you restart Nagios,
it re-runs all it's checks, hence why it then gets updated. After that it
is only run when a service fails.
What I still don't understand is how your uptime command ensures the
router is up? If the router is not up, then Nagios won't be running (as
you're running it on the same host) so it seems quite pointless really. If
the Lanlink checks that the LAN interface is up and connected - that makes
sense, but then a check_ping to 127.0.0.1 as your host check_command would
give the same result as the uptime, then you could have an "Uptime" service
with your check_uptime command.
That way you could be confident that the status detail in Nagios is
reasonably up-to-date.
Andy.
sujith h wrote:
Ok let me explain the scenario in detail.
I have my router in which nagios is installed.
I have to monitor a few services like Lanstatus of
net1 interface, Webserver, and DNS.
Well now for this I have a host.cfg and services.cfg file
where I had configured this way:
Host.cfg
define hostgroup{
hostgroup_name Enpaq
alias Enpaq
members sujith
}
define host{
host_name sujith
alias Enpaq Router
address 127.0.0.1
max_check_attempts 1
check_command check_uptime
check_period 24x7
contact_groups admin
notification_interval 0
notification_period 24x7
notification_options d,u,r,f
}
And services.cfg
define service{
host_name sujith
service_description LAN LINK
check_command check_link!net1
max_check_attempts 1
normal_check_interval 1
retry_check_interval 1
check_period 24x7
notification_interval 2
notification_period 24x7
notification_options w,u,c,r,f
contact_groups admin
}
define service{
host_name sujith
service_description WEB SERVER
check_command check_procs!1:!1:!apache2!SNSlSsRl
max_check_attempts 1
normal_check_interval 1
retry_check_interval 1
check_period 24x7
notification_interval 2
notification_period 24x7
notification_options w,u,c,r,f
contact_groups admin
}
define service{
host_name sujith
service_description DNS
check_command check_dig!sujith.elina.in
max_check_attempts 1
normal_check_interval 1
retry_check_interval 1
check_period 24x7
notification_interval 2
notification_period 24x7
notification_options w,u,c,r,f
contact_groups admin
}
This is all about the 2 files. And let me give the output also.
When I type the command uptime in my router I see like this:
[EMAIL PROTECTED]:~$uptime
15:15:50 up 4 days, 4:54, 1 user, load average: 0.76, 0.70, 0.59
And when I see the nagios page for the Host Detail section, the Status
Information shows me:
20:17:46 up 3 days, 9:56, 1 user, load average: 0.89, 0.86, 0.71
But the output that I had given you is from the running nagios page.
If i would restart nagios then everything will be ok for a while.
This is what I want to know why this output comes like this.
Again in the /var/nagios/status.dat file is there which when I do
ls -lt command , it shows me that its getting updated in each and
every minute. Now if u again have any doubt on what I am trying to
tell please do mail me. Again I do repeat that when I do
/usr/local/nagios/bin/nagios -v /etc/nagios/etc/nagios.cfg
It doesn't give me any error. But this misbehaviour is worrying
me....
Sujith
Bangalore
On 2/28/07, Andy Shellam (Mailing Lists) <
[EMAIL PROTECTED]> wrote:
> I think you need to explain what you're trying to do overall, as this
> isn't making any sense to me!
>
> You cannot possibly determine which server is responding using it's
> uptime output.
> A more sensible option surely would be it's hostname?
>
> #!/bin/bash
> hostname
> exit 0
>
> However you're going to run into a lot of trouble trying to use Nagios
> to monitor a server using its dynamic IP address.
> I think to start with you need to be looking at a solution such as
> Dynamic DNS (e.g. No-IP, DynDNS for commercial services, or Bind with
> DNSSEC/TSIG if you use Bind within your organisation.)
> Your machines would then change their DNS address when they detect their
> IP address has changed, and you would definite it's dynamic DNS hostname as
> the host_name directive to Nagios.
> Only thing you'd have to watch would be if your DNS service fails,
> Nagios will fail on everything.
>
> Re your last e-mail, please give example outputs of what you see on the
> command-line and what Nagios says.
>
> Andy.
>
> sujith h wrote:
>
> Actually the problem with the ping is that we are giving dynamic IP
> address
> so when the ip address changes its difficult to know who is responding
> to the
> ping. And so we moved to ssh and uptime...
>
> Sujith
>
> Bangalore.
>
> On 2/28/07, sujith h < [EMAIL PROTECTED]> wrote:
>
> > Hi Andy,
> >
> > Actually my problem is that it works for some 1 day or more. But after
> > that I get these sort of
> > results. So thats what makes me worry...
> >
> > Sujith
> > Bangalore
> >
> >
> > On 2/28/07, Andy Shellam (Mailing Lists) <[EMAIL PROTECTED] >
> > wrote:
> >
> > > As Patrick said, this plugin (as a host check) will only get run if
> > > a service goes into a non-OK state, therefore showing old information
until
> > > it a service fails.
> > >
> > > I have exactly the same plugin (written myself with a couple of
> > > differences to yours) which runs as a service called "Uptime" on every
host
> > > - this way it is always run every 5 minutes and shows up-to-date info.
> > >
> > > The host check is a simple check_ping.
> > >
> > > HTH
> > >
> > > Andy.
> > >
> > > sujith h wrote:
> > >
> > >
> > > No am running this plugin for host check only
> > >
> > > Sujith
> > > On 2/28/07, Morris, Patrick < [EMAIL PROTECTED] > wrote:
> > > >
> > > > > when I click the Host Detail I can see that
> > > > > in the status information section we have a different output..
> > > > such
> > > > aser
> > > > > 20:17:46 up 3 days, 9:56, 1 user, load average: 0.89, 0.86, 0.71
> > > >
> > > > > Here u can see that am not getting the output synchronized.
> > > >
> > > > > But the problem I had found with uptime only in
> > > > > the Host Detail. The Service Details
> > > > > are running good as if now.
> > > >
> > > > Are you running this command as both a host check and a service
> > > > check?
> > > > If so, that's why you're seeing different output. The host check
> > > > will
> > > > only run if a service on it goes to a non-OK state, and probably
> > > > hasn't
> > > > run for a few days, when the host had only been up for two
> > > > minutes.
> > > >
> > > > It looks like you've defined the same plugin for two checks. If
> > > > that's
> > > > the case, they are never going to match.
> > > >
> > > >
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> > >
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> > > NetServe Support Team
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> NetServe Support Team
>
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>
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> m: +44 (0) 7818 000834
>
>
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--
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NetServe Support Team
the Mail Network
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m: +44 (0) 7818 000834
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