RE: Passing arguments to an OID with the command line tool

Osimar,

 

The crude way to handle this is to use the SNMP extensions to simply
call a script that already has the required command line arguments in
it.  If the arguments don't vary too much, then all you would need to do
is issue an snmpget to that particular OID and the script will execute.
If you need different sets of arguments, then you create additional
OID's for those.  Here's an example (this uses the deprecated "exec"
command because my implementation of this is on a Sun server with an
older SNMP agent):

 

exec .1.3.6.1.4.1.2000.255.1.1 myScript_1 /opt/myscript -s argument1

exec .1.3.6.1.4.1.2000.255.1.1 myScript_2 /opt/myscript -s argument2

exec .1.3.6.1.4.1.2000.255.1.1 myScript_3 /opt/myscript -s argument3

 

To call this, you execute:

 

snmpget -c public -v 2c myhost.mydomain.com
.1.3.6.1.4.1.2000.255.1.1.101.1

 

You should have the script echo the exit status somehow as that is what
will be returned to you when this executed.  You will have to parse the
output of this command.

 

The more common way to deal with this is via inittab entries or their
equivalent on your operating system.  You could also run a cron job
every minute to check for the script.

 

Michael Peoples

Senior Systems Manager

AT&T - ATTSI

Office: 614-789-8559

Cell:    614-886-0923

FAX:   614-789-8975

[email protected] <mailto:[email protected]> 

From: Osimar Medeiros [mailto:[email protected]] 
Sent: Thursday, September 02, 2010 11:40 AM
To: [email protected]
Subject: Passing arguments to an OID with the command line tool

 

	Guys, good morning, how are you ?

	 

	Sorry to jump on you like this, but I am having a problem I
think you may know how to help me solving.

	 

	I have a script, running on a remote server, as a daemon.

	 

	And, sometimes, It crashes.

	 

	Ok, so I use Nagios and SNMP to return the info when it's down,
so I can access the server via SSH and restart the script.

	 

	But, I know I can use Nagios's Event Handlers to do that. That
it, when the script's down, Nagios runs a script ( my extend script),
that uses SNMP's extend feature and it calls my script on my remote
servers. Right ?

	 

	The problem is: I need to pass arguments to the script. And I've
been struggling here to use nsExtendArgs to do that and I have failed
miserably.

	 

	I saw some infos here
(http://www.mail-archive.com/[email protected]/msg085
15.html), and I've got to the point of setting a value to a SNMP object.

	 

	The problem is I can't set this value.

	 

	Check this out:

	 

	snmpset -v2c -c public -OvQ $IP
NET-SNMP-EXTEND-MIB::nsExtendArgs.\"extend\" s "-s argument"

	Error in packet.

	Reason: noAccess

	 

	Now, can you imagine on how I can give myself permission to
write this value to that object ?

	 

	Or do you know any other way to pass an argument via
nsExtendArgs or nsExtendOutputFuil ?

	 

	I thank you any help you can give me.

	 

	 

	Thanks a lot !

	
	[]'s
	Osimar Medeiros
	TI
	----------------------------------------------------------
	VIRID Interatividade Digital
	www.virid.com.br
	Phone: +55 11 4084-5099

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