10:48 a.m.
Hi all,
I'm writing a perl-script to monitor JBOSS-4.0.4.GA via snmp, by using Net::SNMP
5.20 perl module.
The problem is that if I set a community different from 'public',
snmp-queries done via NET::SNMP module on JBOSS snmp-agent don't work.
While snmp-queries done via 'snmpget' command (from command line) on JBOSS
snmp-agent work perfecty with any community.
I worte a little script to isolate the problem:
| #!/usr/bin/perl
| use strict;
| use warnings;
| use Net::SNMP;
| my ($session,$error) = Net::SNMP->session(Hostname => $ARGV[0],
| Community => $ARGV[1]);
| die "session error: $error" unless ($session);
| printf("Hostname: %s Community: %s OID: %s\n", $ARGV[0], $ARGV[1],
$ARGV[2]);
| my $result = $session->get_request("$ARGV[2]");
| die "request error: ".$session->error unless (defined $result);
| $session->close;
| print "OID requested: ".$result->{"$ARGV[2]"}."\n";
|
### myscript.pl end ###
I tested the problem in this scenario:
- host wi064111 running CentOS 4.3
-- JBOSS running snmp-adaptor.sar with community 'public' on port 11112
-- JBOSS running snmp-adaptor.sar with community 'q3lrcdjb' on port 11212
-- snmpd daemon running on port 161 (tested with both previous communities)
The result of my tests is:
1) 'snmpget' command works perfectly quering both snmpd daemon and JBOSS
snmp-agent, with any community:
[root@wi064111 ~]# snmpget -c public -v 1 10.102.64.111:161 .1.3.6.1.2.1.4.1.0
IP-MIB::ipForwarding.0 = INTEGER: notForwarding(2)
[root@wi064111 ~]# snmpget -c q3lrcdjb -v 1 10.102.64.111:161
.1.3.6.1.2.1.4.1.0
IP-MIB::ipForwarding.0 = INTEGER: notForwarding(2)
[root@wi064111 ~]# snmpget -c public -v 1 10.102.64.111:11112 1.2.3.4.1.2
iso.2.3.4.1.2 = Gauge32: 92686392
[root@wi064111 ~]# snmpget -c q3lrcdjb -v 1 10.102.64.111:11212
1.2.3.4.1.2
iso.2.3.4.1.2 = Gauge32: 94004080
2) myscript.pl works perfectly quering snmpd daemon, with any community:
[root@wi064111 ~]# ./myscript.pl wi064111:161 public 1.3.6.1.2.1.4.1.0
Hostname: wi064111:161 Community: public OID: 1.3.6.1.2.1.4.1.0
OID requested: 2
[root@wi064111 ~]# ./myscript.pl wi064111:161 q3lrcdjb 1.3.6.1.2.1.4.1.0
Hostname: wi064111:161 Community: q3lrcdjb OID: 1.3.6.1.2.1.4.1.0
OID requested: 2
3) myscript.pl queries on JBOSS snmp-agent work only with community
'public':
[root@wi064111 ~]# ./myscript.pl wi064111:11112 public 1.2.3.4.1.2
Hostname: wi064111:11112 Community: public OID: 1.2.3.4.1.2
OID requested: 91884232
[root@wi064111 ~]# ./myscript.pl wi064111:11212 q3lrcdjb 1.2.3.4.1.2
Hostname: wi064111:11212 Community: q3lrcdjb OID: 1.2.3.4.1.2
request error: Bad incoming community [public] at ./myscript.pl line 10.
************************************************************************
THIS IS THE ERROR I GET.
Now, NET::SNMP module seems to be ok because works perfectly with snmpd
daemon. On the other side, JBOSS snmp-agent seems to be ok because answers
perfectly to snmpget queries.
But NET::SNMP module with JBOSS snmp-agent doesn'work correctly. Moreover
the error is caused by $session->get_request line, and not by
Net::SNMP->session line. It seems like JBOSS snmp-agent would expect a new
authentication every request.
Could the error be in NET::SNMP module implementation?
Thanks to everyone who just read the whole post,
pako
| ######## Listing of
/jboss/admjboss-4.0.4.GA/jboss-4.0.4.GA/server/part02node01/deploy/snmp-adaptor.sar/META-INF/jboss-service.xml
##########
|
| <?xml version="1.0" encoding="UTF-8"?>
| <service>
| <mbean code="org.jboss.jmx.adaptor.snmp.trapd.TrapdService"
| name="jboss.jmx:name=SnmpAgent,service=trapd,type=logger">
| <attribute name="Port">1162</attribute>
| </mbean>
| <!-- The SNMP adaptor MBean -->
| <mbean code="org.jboss.jmx.adaptor.snmp.agent.SnmpAgentService"
| name="jboss.jmx:name=SnmpAgent,service=snmp,type=adaptor">
| <attribute
name="RequestHandlerClassName">org.jboss.jmx.adaptor.snmp.agent.RequestHandlerImpl</attribute>
| <attribute
name="RequestHandlerResName">/attributes.xml</attribute>
| <attribute
name="TrapFactoryClassName">org.jboss.jmx.adaptor.snmp.agent.TrapFactorySupport</attribute>
| <attribute
name="NotificationMapResName">/notifications.xml</attribute>
| <attribute name="ManagersResName">/managers.xml</attribute>
| <attribute name="HeartBeatPeriod">0</attribute>
| <attribute name="Port">1161</attribute>
| <attribute name="DynamicSubscriptions">false</attribute>
| <attribute name="WriteCommunity">q3lwcdjb</attribute>
| <attribute name="ReadCommunity">q3lrcdjb</attribute>
| <attribute name="SubscriptionList">
| <subscription-list>
| <!-- Monitor events from SNMP adaptor itself -->
| <mbean
name="jboss.jmx:name=SnmpAgent,service=snmp,type=adaptor">
| <notification type="jboss.snmp.agent.coldstart"/>
| </mbean>
| <!-- Monitor timer for heartbeat events -->
| <mbean
name="jboss.jmx:name=SnmpAgent,service=timer,type=heartbeat">
| <notification type="jboss.snmp.agent.heartbeat"/>
| </mbean>
| </subscription-list>
| </attribute>
| <depends optional-attribute-name="TimerName">
| <mbean code="javax.management.timer.Timer"
|
name="jboss.jmx:name=SnmpAgent,service=timer,type=heartbeat"/>
| </depends>
| </mbean>
| <!-- Defines the system information as specified in rfc-1213
| iso.org.dod.internet.mgmt.mib-2.system.* -->
| <mbean code="org.jboss.jmx.adaptor.snmp.system.MIB2SystemGroupService"
| name="jboss.jmx:name=SnmpAgent,service=MIB2SystemGroup">
| <attribute name="SysLocation">In The Matrix</attribute>
| <attribute name="SysDescr">Central Computer</attribute>
| <attribute name="SysContact">Agent Smith</attribute>
| <depends optional-attribute-name="SnmpAgent">
| jboss.jmx:name=SnmpAgent,service=snmp,type=adaptor
| </depends>
| </mbean>
| </service>
|
########### listing of
/jboss/admjboss-4.0.4.GA/jboss-4.0.4.GA/server/part02node01/deploy/snmp-adaptor.sar/attributes.xml
###########
| <?xml version="1.0"?>
| <attribute-mappings>
| <mbean name="jboss.system:type=ServerInfo"
oid-prefix=".1.2.3.4.1">
| <attribute name="ActiveThreadCount" oid=".1"/>
| <attribute name="FreeMemory" oid=".2"/>
| <attribute name="MaxMemory" oid=".3"/>
| <attribute name="TotalMemory" oid=".10"/>
| </mbean>
| <mbean name="jboss.system:service=ThreadPool">
| <attribute name="QueueSize" oid=".1.2.3.4.1.4"/>
| <attribute name="MaximumQueueSize"
oid=".1.2.3.4.1.11"/>
| </mbean>
| <mbean
name="jboss.web:name=http-0.0.0.0-8080,type=GlobalRequestProcessor">
| <attribute name="requestCount" oid=".1.2.3.4.1.5"/>
| </mbean>
| <mbean name="jboss:service=TransactionManager">
| <attribute name="CommitCount" oid=".1.2.3.4.1.6"/>
| <attribute name="RollbackCount" oid=".1.2.3.4.1.7"/>
| <attribute name="TransactionCount"
oid=".1.2.3.4.1.8"/>
| </mbean>
| <mbean name="jboss.jca:name=DefaultDS,service=ManagedConnectionPool"
oid-prefix=".1.2.3.4.1">
| <attribute name="InUseConnectionCount" oid=".9"/>
| </mbean>
| <mbean name="jboss.jmx:name=SnmpAgent,service=MIB2SystemGroup"
oid-prefix=".1.3.6.1.2.1.1">
| <attribute name="SysDescr" oid=".1"
mode="rw"/> <!-- can be modified over snmp -->
| <attribute name="SysObjectId" oid=".2"/>
| <attribute name="SysUpTime" oid=".3"/>
| <attribute name="SysContact" oid=".4"/>
| <attribute name="SysName" oid=".5"/>
| <attribute name="SysLocation" oid=".6"/>
| <attribute name="SysServices" oid=".7"/>
| </mbean>
| </attribute-mappings>
|
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