I think I have a solution to my own question......
Set up rrdtool as a service in xinetd.d with base directory for the daemon
pointing to your perfdata dir.
[root@rrdcache localhost]# cat /etc/xinetd.d/rrdsrv
# default: on
# description: RRDServer
service rrdsrv
# server_args = - /tmp/rrdsrv
# serv_args = - /usr/local/nagios/share/perfdata
{
disable = no
socket_type = stream
protocol = tcp
wait = no
user = root
only_from = 192.168.122.0/24
server = /usr/bin/rrdtool
server_args = - /usr/local/nagios/share/perfdata
}
e.g. /usr/local/nagios/share/perfdata is base dir
e.g. /usr/local/nagios/share/perfdata/localhost/PING.rrd is an example to a
file.
Let's test to see if a remote rrd file exists...
[root@nagios var]# echo "info localhost/PING.rrrrrrrrrd" | nc 192.168.122.32
13900
| grep "No such file or directory" ; echo $?
ERROR: opening 'localhost/PING.rrrrrrrrrd': No such file or directory
0
[root@nagios var]# echo "info localhost/PING.rrd" | nc 192.168.122.32 13900
| grep
"No such file or directory" ; echo $?
1
So, if 0, rrdtool create. If 1, rrdtool update :)
I'm sure there's a prettier way of scripting this using ....
fileexists=0
[test condition] || fileexists=1 (or something similar?)
if $fileexists=0
then
rrdtool create
else
rrdtool update
fi
Any takers?
I hope this helps someone.
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