I am having a problem figuring out see what is actually being executed from a
service. Is there a way to get the nagios log to contain the actual command
being executed?
This is what I am seeing in the Nagios.log file:
[1290013792] SERVICE ALERT: myhost.com;Special
App;CRITICAL;SOFT;1;(Service Check Timed Out)
This is what I see in the nagios.dat file:
check_command=check_http!/myURL!alive
So, this shows me what the command string is in the service.cfg. I cannot see,
though, what the actual command line is at this moment in time. It turns out
that this check_command corresponds (I think) to:
check_http -u /myURL -s alive
How would I know this, though, if the command definition had been changed or if
it is using, because of a mis-spelling, a command I do not think it is using?
If I go into the command.cfg and switch the order of parameters, for example, I
see nothing in these logs that tells me what is doing what.
I know the simplest answer is "You should not do that." But my point is that
the log file does not have enough information to tell me what happened at a
past moment of time. I would need the log information _and_ the state of the
command definitions at that time. If a log does not show you what happened in
the past, what is its purpose?
I am having a problem with a particular web application. For some reason I put
in the check and it fails. I execute the check_http that I _think_ this service
is doing, and it gives me an OK. I ended up creating a custom executable that
calls curl and fetches against the same URL and this now works fine. Kind of
lame, though. I use check_http in about 100 other services. So, why is this one
single service not working? An obvious answer is that I am not calling the
command in the way I think I am. But if I look in the log to see what the
service did, I can see what I _think_ it did based on what I can see in what I
_think_ is the correct command definition. But I really do not know. I do not
see a line like "check_http -u /myURL -s alive" in the log, so, I cannot see if
I am mis-reading things.
Any suggestions?
- ray
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