(forgive this wordy post, but as I type it out, I'm starting to figure out
solutions..)
Problem:
We are monitoring a server with several different probes, and thus created a
probe group for that server. We're having some issues now with duplicate
notifications going out, and was wondering if you all can look at what I'm
currently doing, and perhaps suggest a better way of setting it up.
Currently, I have a notification set up for (1) the probe group itself, (2)
snmp resources, which is the control probe, (3) port 80, (4) port 443, and (5)
port 25. When this server had problems recently, a director received separate
emails for the probe group, port 80 going down, and port 443 down. I think this
accurate, because the control probe (snmp) never went down, so that's why
seperate alerts went out for 80 and 443, but the group probe alert seems a bit
redundant.
My question is, can I reduce the number of notifications going out somehow on
one device?
Do I actually need a notification on the probe group if I have notifications on
each probe inside? Or... can I turn off all the probes inside, and let the
probe group notification handle everything? (if the probe group is the only
notifier, what if it turns red for port 80, then later 443 goes down, will
another alert go out? In that instance we WANT another to go out..)
Also, regardless of the above questions, I should make sure that my control
probe (usually SNMP) polls more frequently then the other probes to reduce the
chance of multiple notifications going out if the server goes down... correct?
So I'm thinking of setting up my notifications as follows;
SERVER1 Probe Group - No notifications
--SERVER1 SNMP Probe - 2 minute poll, no delay on notify
--SERVER1 TCP Port 80 Probe - 2 minutes, 2 minute delay on notify
--SERVER1 TCP Port 443 - 2 minutes, 2 minute delay on notify
--SERVER1 TCP Port 25 - 2 minutes, 2 minute delay on notify
This should reduce the number of duplicates (w/ the probe group notifier) and
also by having the delay on the "other" probes, it gives the control probe a
chance to actually trigger first and prevent the other notifiers...
Good idea, am I on the right track?? Thanks for your input!
Michael
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