The UI is up, but I don’t see anything¶
Here are the things to check and fix:
Are there perfdata generated?¶
On the Nagios server, check if perfdata are generated. The location is defined
in the proces-service-perfdata-file
and proces-host-perfdata-file
commands on Nagios, as seen in Nagios & nagios_dispatcher section.
Assuming default configuration (/var/lib/nagios3/spool/perfdata/
), you can
check like this:
# ls -al /var/lib/nagios3/spool/perfdata/
Warning
Obviously, you need to have configured Nagios so that checks are actually performed to expect perfdata generated.
If files are getting created, you can skip to the next item. Otherwise, you need to
configure Nagios so perfdata are processed, as documented in
Nagios & nagios_dispatcher. Also be careful, if the nagios_dispatcher
is running, perfdata files won’t stay long in the perfdata directory.
Is nagios_dispatcher running?¶
If perfdata are being generated but are accumulating, you have an issue with the nagios dispatcher:
check and double check the configuration file
- perfdata directory
- connection credentials
- host and port
check the connection with the opm database
- PostgreSQL logs
- pg_hba and/or credentials
check that the daemon is running:
root:~# ps aux | grep nagios_dispatcher
check the nagios dispatcher logs
beware:
debug=1
in the dispatcher configuration file will make it stop
at the first problem in the data.
When the perfdata are being removed from the perfdata directory, you can move to the next item.
Are the perfdata accumulating in the hub table?¶
If the nagios_dispatcher is running and perfdata files being removed, lines
should be added in the wh_nagios.hub
table of the opm
database:
opm=# SELECT COUNT(*) FROM wh_nagios.hub;
Warning
If you don’t see any line appearing in this table, it’s very likely that you’re looking at the wrong server and/or the wrong database.
According to the wh_nagios documentation, you should have setup a cron
to call the wh_nagios.dispatch_record()
stored function every minute.
If after some minutes the number of records doesn’t fall, there’s a problem with this cron. Make sure to double check:
* output of this cron if you redirected it to a file or a mail
* credential access (you can use a `.pgpass file
host, port, user, database…
check the connection with the opm database
- PostgreSQL logs
- pg_hba and/or credentials
Once the wh_nagios.dispatch_record()
is successfully called, the data will
appear in the user tables. You can check for instance the number of servers the
UI knows about:
opm=# SELECT COUNT(*) FROM public.servers;
I still can’t see anything in the UI¶
check the credentials for the dedicated UI user
check the UI configuration file
check the connection with the opm database
- PostgreSQL logs
- pg_hba and/or credentials
check the UI logs. For instance, if you used an Apache server, the
opm.log
. If you tried with the morbo tool, then the standard output.check that you connect to the good OPM UI server.