Re: [monit] Question about multi-host testing

[Martin Pala]

Pablo Iranzo Gómez wrote:
> 	Martin, 
>
>         I've did this one before writing to the list, but failed, so that was
> the reason:
>
> check host ro5000-gkgRn17229AEBsh17232 with address 10.39.16.1
>         if failed ICMP type ECHO count 1 timeout 10 seconds then alert
>         alert address@hidden with reminder on 1 cycle
>
> check host pos10.5000-gkgRn17229AEBsh17232 with address 10.39.16.10
>         if failed ICMP type ECHO count 1 timeout 10 seconds then alert
>         depends on ro5000-gkgRn17229AEBsh17232
>         alert address@hidden with reminder on 1 cycle
>
>         The "gkgRn17229AEBsh17232" is just to ensure that there are no service
> name duplicates, what I'm getting is two email alerts

Can you run monit in verbose mode (-v option) and send the log? You'll 
see in it what happened in more detail.


>         If I just put "if failed icmp then alert" monit complains about
> configuration (I'm using monit-4.9-1), so either I'm doing something
> wrong or it's a problem with this verson.

I'm sorry - this was typo (i wrote the example just from memory so, the 
"type echo" was missing).


Thanks,

Martin




>         
>
>
> El vie, 26-10-2007 a las 23:08 +0200, Martin Pala escribió:
> > The icmp test is part of host check only. If you want to check more 
> > hosts, you thus need to specify one "check host" per each host and use 
> > dependency to set the relationship. Example:
> >
> > --8<--
> > check yourswitch with address 10.10.10.2
> >    if failed icmp then alert
> >
> > check yourneighbour with address 10.10.10.10
> >    if failed icmp then alert
> >    depends on yourswitch
> >
> > check yourrouter with address 10.10.10.1
> >    if failed icmp then alert
> >    depends on yourswitch
> >
> > check remoterouter with address 192.168.1.1
> >    if failed icmp then alert
> >    depends on yourswitch
> >    depends on yourrouter
> >
> > check remoteswitch with address 192.168.1.2
> >    if failed icmp then alert
> >    depends on yourswitch
> >    depends on yourrouter
> >    depends on remoterouter
> >
> > check remotehost with address 192.168.1.10
> >    if failed icmp then alert
> >    depends on yourswitch
> >    depends on yourrouter
> >    depends on remoterouter
> >    depends on remoteswitch
> > --8<--
> >
> > Monit currently supports soft dependency, which provides correct 
> > sequence ... the hard dependency support is planned:
> >
> > http://www.tildeslash.com/monit/doc/next.php#27
> >
> >
> > Martin
> >
> >
> >
> > Pablo Iranzo Gómez wrote:
> > >         Hi
> > >         I would like to do a chain-testing for connectivity using the ICMP
> > > test, for example:
> > >
> > >         If you have this network layout:
> > >
> > >         Your computer -> a computer in your same switch -> the switch -> router
> > > -> remote router -> remote switch -> remote computer
> > >
> > >
> > >         It doesn't make sense to report a connectivity problem with remote
> > > computer, if every step in the chain could fail, so to correclty
> > > determine the problem you would need something like:
> > >
> > >         Chech host remotecomputer with address 10.10.10.10
> > >           if passed host yourneighbour then
> > > 	    if passed host yourswitch then 
> > > 	      if passed host your router then 
> > > 	        if passed host remoterouter then 
> > > 	          if passed host remoteswitch then
> > >                      if failed host remotecomputer then alert
> > >
> > >         But afaik, ICMP doesn't accept specifying "host", as it is supposed to
> > > be inside a check host sentence... otherwise, using "depends" just works
> > > for starting/stoping services, not for chain-dependencing failures (like
> > > first check if you can ping your router before claiming host being down)
> > >
> > >         ¿There's anything that I could have not considered in order to archieve
> > > this?
> > >
> > >         Regards
> > >         Pablo
> > >         
> > >
> > >
> > >
> > >
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