This KB article explains the send_nrdp NRDP clients that are available and how to use them. In the current release of NRDP the following client scripts are available:
The following topics are also discussed:
To use the NRDP client you require the following:
NRDP URL
This is the address that the NRDP server can be contacted on, for example:
http://10.25.5.2/nrdp
NRDP Token
The token is the authentication method to connect to the NRDP server, it's like a password, for example:
XXXXX
This client is a PHP script, which means that the PHP language needs to be installed on the machine you are executing it on.
./send_nrdp.php --url=<url> --token=<token> --host=<hostname> [--service=<servicename>] --state=<state> --output=<output> [--usestdin] [--delim=\t]
<url> = The URL used to access the remote NRDP agent.
<token> = The secret token used to access the remote NRDP agent.
<hostname> = The name of the host associated with the passive host/service check result.
<servicename> = For service checks, the name of the service associated with the passive check result.
<state> = An integer indicating the current state of the host or service.
<output> = Text output to be sent as the passive check result. Newlines should be encoded with encoded newlines (\n).
<usestdin> = Accept check result data from STDIN instead of --host,--service,--state,--output flags
Each line contains a check result in the format of:
host[DELIM]state[DELIM]output[DELIM]
or
host[DELIM]service[DELIM]state[DELIM]output[DELIM]
<delim> = The delimeter (DELIM above) to use when processing from STDIN. The default is \t (TAB)
Send a passive host or service check result to a remote Nagios instance using the NRDP agent.
Host example with an UP state:
./send_nrdp.php --url=http://10.25.5.2/nrdp --token=XXXXX --host=centos01 --state=0 --output="The host is up and OK"
Service example with a WARNING state:
./send_nrdp.php --url=http://10.25.5.2/nrdp --token=XXXXX --host=centos01 --service="Disk Usage" --state=1 --output="WARNING: The disk is 75% full"
This client is a Python script, which means that the Python language needs to be installed on the machine you are executing it on.
./send_nrdp.py --help
usage: send_nrdp.py [-h] [-u URL] [-t TOKEN] [-H HOSTNAME] [-s SERVICE]
[-S STATE] [-o OUTPUT] [-f FILE] [-d DELIM] [-c CHECKTYPE]
optional arguments:
-h, --help show this help message and exit
-u URL, --url URL REQUIRED The URL used to access the remote NRDP agent.
-t TOKEN, --token TOKEN
REQUIRED The authentication token used to access the
remote NRDP agent.
-H HOSTNAME, --hostname HOSTNAME
The name of the host associated with the passive host/service
check result.
-s SERVICE, --service SERVICE
For service checks, the name of the service associated with the
passive check result.
-S STATE, --state STATE
An integer indicating the current state of the host or service.
-o OUTPUT, --output OUTPUT
Text output to be sent as the passive check result.
Newlines should be encoded with encoded newlines (\n).
-f FILE, --file FILE This file will be sent to the NRDP server specified in -u
The file should be an XML file in the following format:
##################################################
<?xml version='1.0'?>
<checkresults>
<checkresult type="host" checktype="1">
<hostname>YOUR_HOSTNAME</hostname>
<state>0</state>
<output>OK|perfdata=1.00;5;10;0</output>
</checkresult>
<checkresult type="service" checktype="1">
<hostname>YOUR_HOSTNAME</hostname>
<servicename>YOUR_SERVICENAME</servicename>
<state>0</state>
<output>OK|perfdata=1.00;5;10;0</output>
</checkresult>
</checkresults>
##################################################
-d DELIM, --delim DELIM
With only the required parameters send_nrdp.py is capable of
processing data piped to it either from a file or other process.
By default, we use t (\t) as the delimiter however this may be
specified with the -d option data should be in the following
formats of one entry per line:
printf "<hostname>\t<state>\t<output>\n"
printf "<hostname>\t<service>\t<state>\t<output>\n"
-c CHECKTYPE, --checktype CHECKTYPE
1 for passive 0 for active
Host example with an UP state:
./send_nrdp.py -u http://10.25.5.2/nrdp/ -t XXXXX -H centos01 -S 0 -o "The host is up and OK"
Service example with a WARNING state:
./send_nrdp.py -u http://10.25.5.2/nrdp/ -t XXXXX -H centos01 -s "Disk Usage" -S 1 -o "WARNING: The disk is 75% full"
With the Python script it is important that the URL ends with a /
This client is a shell script, which means that the shell language needs to be installed on the machine you are executing it on.
./send_nrdp.sh -h
send_nrdp.sh Revision 0.6.1 - Send NRDP script for Nagios
Usage: send_nrdp.sh -u URL -t token [options]
Usage: send_nrdp.sh -h display help
This script is used to send NRDP data to a Nagios server
Required:
-u, URL of NRDP server. Usually http://<IP_ADDRESS>/nrdp/
-t, Shared token. Must be the same token set in NRDP Server
Options:
Single Check:
-H host name
-s service name
-S State
-o output
STDIN:
[-d delimiter] (default -d "\t")
With only the required parameters send_nrdp.sh is capable of
processing data piped to it either from a file or other
process. By default, we use \t as the delimiter however this
may be specified with the -d option data should be in the
following formats one entry per line.
For Host checks:
hostname State output
For Service checks
hostname servicename State output
File:
-f /full/path/to/file
This file will be sent to the NRDP server specified in -u
The file should be an XML file in the following format
##################################################
<?xml version='1.0'?>
<checkresults>
<checkresult type="host" checktype="1">
<hostname>YOUR_HOSTNAME</hostname>
<state>0</state>
<output>OK|perfdata=1.00;5;10;0</output>
</checkresult>
<checkresult type="service" checktype="1">
<hostname>YOUR_HOSTNAME</hostname>
<servicename>YOUR_SERVICENAME</servicename>
<state>0</state>
<output>OK|perfdata=1.00;5;10;0</output>
</checkresult>
</checkresults>
##################################################
Directory:
-D /path/to/temp/dir
This is a directory that contains XML files in the format
above. Additionally, if the -d flag is specified, send_nrdp.sh
will create temp files here if the server could not be reached.
On additional calls with the same -D path, if a connection to
the server is successful, all temp files will be sent.
Host example with an UP state:
./send_nrdp.sh -u http://10.25.5.2/nrdp/ -t XXXXX -H centos01 -S 0 -o "The host is up and OK"
Service example with a WARNING state:
./send_nrdp.sh -u http://10.25.5.2/nrdp/ -t XXXXX -H centos01 -s "Disk Usage" -S 1 -o "WARNING: The disk is 75% full"
These commands will produce output like:
Sent 1 checks to http://10.25.5.2/nrdp/
The scripts are capable of using the standard input (STDIN), commonly done by piping a correctly formatted text string to the send_nrdp client.
By default, \t (tab) is the delimiter. The string should be in the following formats.
Host Checks:
hostname State output
Service Checks:
hostname servicename State output
The printf command allows you to generate that format. In addition, it is good practice to add a new line \n to the end of the string.
A Host Check:
printf "centos01\t0\tThe host is up and OK\n"
A Service Check:
printf "centos01\tDisk Usage\t1\tWARNING: The disk is 75%% full\n"
It's also important to note that I needed to use a %% twice so that it is escaped, otherwise it would generate WARNING: The disk is 75 0.000000ull due to how printf works.
Now that you have the format, piping the text string to the send_nrdp client is done like so.
printf "centos01\t0\tThe host is up and OK\n" | ./send_nrdp.py -u http://10.25.5.2/nrdp/ -t XXXXX
printf "centos01\t0\tThe host is up and OK\n" | ./send_nrdp.php --url=http://10.25.5.2/nrdp --token=XXXXX --usestdin
printf "centos01\t0\tThe host is up and OK\n" | ./send_nrdp.sh -u http://10.25.5.2/nrdp/ -t XXXXX
This command will produce output like:
Sent 1 checks to http://10.25.5.2/nrdp/
Multiple checks can be sent in the one text string:
printf "centos01\t0\tThe host is up and OK\ncentos01\tDisk Usage\t1\tWARNING: The disk is 75%% full\n" | ./send_nrdp.sh -u http://10.25.5.2/nrdp/ -t XXXXX
This command will produce output like:
Sent 2 checks to http://10.25.5.2/nrdp/
The send_nrdp.sh script is capable of using an XML formatted file. Here is an example of an XML file with a host check result:
<?xml version='1.0'?>
<checkresults>
<checkresult type="host" checktype="1">
<hostname>centos01</hostname>
<state>0</state>
<output>The host is up and OK</output>
</checkresult>
</checkresults>
Multiple check results can be included in an XML file. Here is an example of an XML file with a host AND service check result:
<?xml version='1.0'?>
<checkresults>
<checkresult type="host" checktype="1">
<hostname>centos01</hostname>
<state>0</state>
<output>The host is up and OK</output>
</checkresult>
<checkresult type="service" checktype="1">
<hostname>centos01</hostname>
<servicename>Disk Usage</servicename>
<state>1</state>
<output>WARNING: The disk is 75% full</output>
</checkresult>
</checkresults>
Now that you have the format, using the send_nrdp client with the file is done like so.
The send_nrdp.php script does not currently support check results from an XML file.
./send_nrdp.py -u http://10.25.5.150/nrdp/ -t XXXXX -f /tmp/nrdp.xml
./send_nrdp.sh -u http://10.25.5.2/nrdp/ -t XXXXX -f /tmp/nrdp.xml
Multiple check results can be included in an XML file. Here is an example of an XML file with a host AND service check result:
<?xml version='1.0'?>
<checkresults>
<checkresult type="host" checktype="1">
<hostname>centos01</hostname>
<state>0</state>
<output>The host is up and OK</output>
</checkresult>
<checkresult type="service" checktype="1">
<hostname>centos01</hostname>
<servicename>Disk Usage</servicename>
<state>1</state>
<output>WARNING: The disk is 75% full</output>
</checkresult>
</checkresults>
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