Im trying to include the hostgroups in my nagios notification. I modified the commands.cfg notify_host_by_email command to include
... Host: $HOSTNAME$\nHostgroups: $HOSTGROUPS$\nState: $HOSTSTATE$ ...
but that doesn't seem to work. I just get Hostgroups: $ in my email. Does anyone know the right way to do this?
the current behavior is correct as you are trying to use invalid macro.
To get list of all supported Nagios macros see this document.
You should use $HOSTGROUPNAME$ instead of $HOSTGROUPS$ or maybe $HOSTGROUPNAMES$ if it is usual that your hosts belongs to multiple host groups.