ordering service checks

[Derek Olsen]

    Hello.
    I'm hoping to get some input in the best nagios way to solve this 
particular situation.

    So I have an application to monitor that requires multiple steps to 
determine the overall health of the application.   So here is a simple 
example that demonstrates my situation.

    1.    Email is sent to an address associated with an in house 
reporting application.   
    2.    During the 5 - 30 minutes following the first step (as long as 
the first step succeeded ok)
           another service checsk a specific URL for a resulting pdf 
file.   If the pdf file is available then the overall service is ok and 
the monitor repeats itself.   It's important that step #1 doesnt run 
again until  after  step 2 completes OK.


     So some of the approaches I have started to mentally walk through 
are listed here.    I'm fairly new to nagios and have used basic 
dependency checking before but have never tried to tackle a problem like 
this so I'm hoping someone will suggest some high level options for me 
to consider.

    Approach #1.
    Have a cron job kick off a shell script which permforms the above 
steps and iterates through step #2 using timers/sleep and then submits 
passive results to nagios.

    Approach #2.  I've not worked through all the details of this 
approach but I imagine I would be able to
setup service #1 to have a very high normal_check_interval (say 60) and 
then use a dependency so #2 wont execute unless service #1 is ok.    But 
even if I have the dependency for #2 on #1 being ok what if #1 didnt run 
for some reason but is still listed as OK from the previous run then #2 
would execute and start looking for a file that would never show up.

    Anyhoo any tips/pointers on other/better approaches I might consider 
would be super groovy.
    THanks.   Deet.


   
   

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