How do I check if a website is up?
Andy Shellam
andy-lists at networkmail.eu
Tue Oct 21 20:15:43 CEST 2008
Hi Josh,
You can, I believe, define a host using it's DNS name, however I and I'm
sure the rest of the community would discourage that for the simple
reason that if the DNS doesn't resolve, that host will be deemed down.
However to check a website you can still add the host via it's IP
address and add a check_http service check to that host, and instruct
check_http to check the host header of the website (e.g.
www.example.com, using the -H option).
Regards,
Andy
Josh Wells wrote:
> Is it possible to define a host using URL rather than IP address?
>
>
> ------------------------------------------------------------------------
> *From:* Ben O'Hara [mailto:bohara at gmail.com]
> *Sent:* Monday, October 20, 2008 12:34 PM
> *To:* Josh Wells
> *Cc:* nagios
> *Subject:* Re: [Nagios-users] How do I check if a website is up?
>
> What i have done in the past is,
>
> a) create a host for www.example.com <http://www.example.com>
> b) ceate a host group - "External"
> c) stick www.example.com <http://www.example.com> in Eternal group
> ) add service check to host
>
> Yu can then add numberous external checks into the group or check
> other services on the host.
>
> Seemed to make sense that way for me back then
>
> Ben
>
> On Mon, Oct 20, 2008 at 6:17 PM, Josh Wells <josh.wells at lionbank.com
> <mailto:josh.wells at lionbank.com>> wrote:
>
>
> Ok I defined the command as you specified in my commands.cfg file. I
> then added a service definition in my localhost.cfg file using that
> command. It appears to be working. How do I configure an alert for
> this
> type of check? I would like to be notified if the website is not
> reachable for more than say 5 minutes. Also while this is functional I
> don't really like that this website check is showing up under my
> nagios
> server host. I would prefer that it have its own host definition or at
> least appear separately from the other hosts. Is it possible to do
> this
> using a URL?
>
> Thanks for your help. I used the quickstart guide to get my server up
> and running so still pretty green with nagios but I'm learning.
>
> Josh
>
>
> -----Original Message-----
> From: Assaf Flatto [mailto:assaf.flatto at ssp.uk.com
> <mailto:assaf.flatto at ssp.uk.com>]
> Sent: Monday, October 20, 2008 11:03 AM
> To: Nagios User list
> Subject: Re: [Nagios-users] How do I check if a website is up?
>
> No , you don't have to define a host .
>
> you define a service check with the fix parameters ( as i gave in the
> previous mail ) and assign this check to an existing host .
>
> that host will execute the check and report the status returned
> from the
> command ( personally i'd run it from the nagios server itself) .
>
>
> On Monday 20 October 2008 15:58:25 Josh Wells wrote:
> > Ok so if the website is external to my network I need to create
> a host
> > definition? What would that look like for a URL? I've only made host
> > definitions for internal hosts using the IP address. Because the
> website
> > is a hosted solution I would rather define it by URL than IP
> address.
> Is
> > this possible?
> >
> >
> >
> > -----Original Message-----
> > From: Assaf Flatto [mailto:assaf.flatto at ssp.uk.com
> <mailto:assaf.flatto at ssp.uk.com>]
> > Sent: Monday, October 20, 2008 10:46 AM
> > To: nagios-users at lists.sourceforge.net
> <mailto:nagios-users at lists.sourceforge.net>
> > Subject: Re: [Nagios-users] How do I check if a website is up?
> >
> > Not nessaceily .
> >
> > If you have that website in your network , you can just define the
> > check_http check to that host.
> > also you can add in one of the parameters the specific URL you
> wish to
> > query .
> >
> > -u, --url=PATH
> > URL to GET or POST (default: /)
> >
> >
> > Or you can define a check on the nagios server it self to query the
> web
> > site like this :
> >
> > # 'check_website' command definition
> > define command{
> > command_name check_website
> > command_line $USER1$/check_http -H www.website.com
> <http://www.website.com>
> > }
> >
> >
> > If not , then you need to build a new host definition and service
> check
> > for that host .
> >
> > On Monday 20 October 2008 15:18:53 Josh Wells wrote:
> > > Do I have to define a remote host such as www.website.com
> <http://www.website.com> in order
> to
> > > apply the check_http service against that host?
>
>
>
> --
>
> Assaf Flatto
> SSP Ops Team
> Linux System Administrator
>
>
>
>
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