Thanks to Thomas.Anders for reply to my first posting. I'm having
problems with my subscription to the list so I could see your reply in
the archive, but I couldn't see any way to send mail back other than
start a new thread. Apologies for that. I've adjusted a subscription
option, with luck that'll fix it...
Ref your questions Thomas, hopefully this provides the information....
Building software - I just ran configure, it appears everything I need
is in by default. The only difference was the PREFIX meant it installed
in a different place from the OS supplied binaries etc. The Net-SMP
version is 5.6.1.1
I didn't remove OS-supplied package first, but I was running the correct
one installed in the new PREFIX (although I got caught out by location
of conf file, so my previous comment about it not looking for any conf
file was incorrect, it was however looking for perl.conf not
<subagentname>.conf where the agent name is passed into the agent
object)
I have now removed the OS supplied package and re-run make install (did
not re-configure and re-build completely) I am going to try this now and
what the compilation more closely...
Make completed without error at all times. When building, installing
over existing packages and installing with existing packages.
This is how I ran snmpd
/usr/local/sbin/snmpd -f -Lf /tmp/snmpd.log
-Dregister_mib,handler::register,agentx/subagent -c /etc/snmp/snmpd.conf
I don't know if there may be any issue around the conf file being in
standard location and my build defaulting to /usr/local/etc/snmp. I'm
guessing not as I use the -c option
As for configuring and starting the subagent, not quite sure what you
mean here, I have now created a /usr/local/etc/snmp/perl.conf (well a
link to the usual location) and this is being opened (I can see in
strace) It contains:-
agentx-master /var/agentx/master
#agentx-master localhost:705
This is how I run my subagent
strace -f -o /tmp/strace.out ./multipath-subagent.pl
As for the subagent code, I have pretty much taken the example code and
just cut it right back to perform a registration to see if I could get
that going (I can't) plus also made changes I though might help. Here is
the code:-
#!/usr/bin/perl -w
use strict;
use NetSNMP::agent (':all');
use NetSNMP::OID (':all');
use NetSNMP::ASN (':all');
use Data::Dumper;
#-----------------------------------------------------------------------
-----------------------------
my ($gAgentObj);
my ($gRunning);
my $gMbloxBaseOID = '.1.3.6.1.4.1.19774';
my $gBaseOID = $gMbloxBaseOID . '.255';
#-----------------------------------------------------------------------
-----------------------------
my ($err);
my ($regOID);
$regOID = new NetSNMP::OID($gBaseOID);
$SIG{'INT'} = 'SigINTHandler';
$gAgentObj = new NetSNMP::agent(
Name => 'multipath',
AgentX => 1,
);
print "About to register \n";
if (($err =
$gAgentObj->register('multipath',$regOID,\&MultipathHandler)) != 0)
{
print "Failed to register our OID $gBaseOID Error: $err Exiting
\n";
print $gAgentObj,"\n";
print Data::Dumper->Dump([$gAgentObj]);
#sleep 3;
#$gAgentObj->shutdown();
#exit 1;
}
$gRunning = 1;
while($gRunning)
{
$gAgentObj->agent_check_and_process(1);
}
print "SIGINT received - Shutting down...\n";
$gAgentObj->shutdown();
exit 0;
#-----------------------------------------------------------------------
-----------------------------
sub SigINTHandler
{
$gRunning = 0;
}
#-----------------------------------------------------------------------
-----------------------------
sub MultipathHandler
{
my ($handler, $reg_info, $request_info, $requests) = @_;
print "Handler called \n";
}
#-----------------------------------------------------------------------
-----------------------------
A bit of the strace dump file...
1008 gettimeofday({1342596642, 428277}, NULL) = 0
1008 pipe([3, 4]) = 0
1008 pipe([5, 6]) = 0
1008 write(1, "About to register \n", 19) = 19
1008 write(1, "Failed to register our OID .1.3."..., 130) = 130
1008 write(1, "NetSNMP::agent=HASH(0x18683450)\n", 32) = 32
1008 write(1, "$VAR1 = bless( {\n "..., 126) = 126
1008 gettimeofday({1342596642, 429604}, NULL) = 0
1008 select(6, [3 5], NULL, NULL, NULL
You can see between my two debug messages 'About to register' and
'Failed to register' there is no attempt to communicate with the master.
On the half working system I do see some socket send/recv activity at
this point. The select is it blocking on the
'$gAgentObj->agent_check_and_process(1);' call.
Finally here is the mini-MIB I created, again not really supposed to be
functional just enough to prove the registration. Again this was lifted
from a tutorial, with a few changes
MBLOX-MULTIPATH-MIB DEFINITIONS ::= BEGIN
-- A Comment!
-- IMPORTS: Include definitions from other mibs here, which is always
-- the first item in a MIB file.
IMPORTS
OBJECT-TYPE, Integer32, enterprises,
MODULE-IDENTITY FROM SNMPv2-SMI
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF;
mblox OBJECT IDENTIFIER ::= { enterprises 19774 }
--
-- A brief description and update information about this mib.
--
mbloxMultipathMIB MODULE-IDENTITY
LAST-UPDATED "201207120000Z" -- midnight
ORGANIZATION "mBlox"
CONTACT-INFO "postal: Bill Melotti
email: [email protected]
"
DESCRIPTION "A simple mib for demonstration purposes.
Not anywhere near complete yet
"
::= { mblox 255 }
-- Define typical mib nodes, like where the objects are going to lie.
-- we'll prefix everything in this mib with nst (net snmp tutorial)
mmMIBObjects OBJECT IDENTIFIER ::= { mbloxMultipathMIB 1 }
-- define 3 objects, which will all be implemented in different ways
-- within the tutorial.
mmAgentModules OBJECT IDENTIFIER ::= { mmMIBObjects 1 }
mmAgentModuleObject OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This is an object that simply supports a writable integer
when compiled into the agent. See
http://www.net-snmp.org/tutorial-5/toolkit/XXX for further
implementation details."
DEFVAL { 1 }
::= { mmAgentModules 1 }
<snip - Lots of commented lines removed>
END
I could start with the example code, but unless I'm being really stupid
I can't see any significant difference.
Any ideas?
Regards
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