Null Value During Oracle Check

[dcharles]

Hello,

I guess this is more of a Check_MK specific question, however it does relate to Nagios Core.

We are running Check_MK 1.2.0p2 and Nagios Core 3.4.1. We are trying to use Check_MK to monitor Oracle on our Oracle 11.2 host.

I’ve set up a manual check as

checks += [
( "db01", "oracle_version", "testuser", None ),

( "db01", "oracle_sessions", "testuser", (30, 35) )
]

The checks seem to work fine when the database is running, but when I bring the database down to test alerting, I get a null value for the Check_MK check, instead of any alerts.

Also, when I do a cmk –d, under the <<<oracle_version>>> and <<<oracle_sessions>>> sections of the output, there is no data.

My question is, is there a way to force a database check, when a database goes down or is offline? I think I understand why we’re getting a null value for the Check_MK check; there is no data coming from the database host since the database is down. Please correct me if I’m wrong.

Thanks for your help in advance.

[sreinhardt]

It sounds like you are correct regarding the plugin\check always expecting data and not returning correctly if it doesn't receive it. However I can't really offer much help in the way of check_mk manual checks for configuration, since we rarely see it in use.