UNKNOWN localhost - Hostname info not available.

[dimitris]

I'm trying to use check_multiple_metrics.sh and I'm getting

UNKNOWN localhost - Hostname info not available. Likely invalid hostname

My nagios.log and /var/log/messages

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[1446798122] SERVICE NOTIFICATION: nagiosadmin;localhost;Check Multiple Metrics;UNKNOWN;notify-service-by-email;UNKNOWN localhost - Hostname info not available. Likely invalid hostname

which is the same in nagios web interface

In error_log I'm getting this warning which I think is irrelevant.
tail -f /var/log/httpd/error_log

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[Fri Nov 06 11:12:46 2015] [error] [client ::1] PHP Warning:  date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EET/2.0/no DST' instead in /usr/share/ganglia/cluster_view.php on line 36

My ganglia-services.cfg is

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define command {
  command_name  check_ganglia_multiple_metrics
  command_line  /bin/sh /var/www/html/ganglia2/nagios/check_multiple_metrics.sh host=$HOSTNAME$ checks='$ARG1$'
}

define service {
  service_description   Check Multiple Metrics
  use                   generic-service
  check_command         check_ganglia_multiple_metrics!disk_free_rootfs,less,10:disk_free_tmp,less,20
  host_name             localhost
}

I also tried to change host_name into 127.0.0.1 but didn't fix it. Any help please?

[tgriep]

Try changing your command from

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command_line  /bin/sh /var/www/html/ganglia2/nagios/check_multiple_metrics.sh host=$HOSTNAME$ checks='$ARG1$'

to

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command_line  /bin/sh /var/www/html/ganglia2/nagios/check_multiple_metrics.sh host=$HOSTADDRESS$ checks='$ARG1$'

Try that and see if that works for you.

[dimitris]

Thank you for your reply but unfortunately it's not that. Any other suggestion to try please?

[Box293]

What happens when you execute it at the command line?

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su nagios
/bin/sh /var/www/html/ganglia2/nagios/check_multiple_metrics.sh host=localhost checks='disk_free_rootfs,less,10:disk_free_tmp,less,20'

[dimitris]

Thank you Box293. I'm getting the same error. UNKNOWN localhost - Hostname info not available. Likely invalid hostname

[jolson]

Interesting. Could you share your localhost host definition with us please? Are you certain that there are no extra spaces in the hostname or similar?

[dimitris]

Forgive my Joison I'm not sure what do you mean exactly?

[rkennedy]

The hosts directive, it should look similar to -

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define host {
        host_name   localhost

[dimitris]

and that was the problem!
When I changed, in the host definition of the localhost.cfg in /usr/local/nagios/etc/objects, the address from the default 127.0.0.1 to my node's address it started running correctly.
Thank you all for your help!!!

[hsmith]

Glad to hear it's working. I'll go ahead and close this one and mark it as resolved. Please let us know if anything else comes up.