Re: monitoring hudson via SNMP

[gaoithe]

really really old post BUT yes it is easy to turn on JVM SNMP monitoring with
jenkins.

SNMP is on UDP so you will not be able to use telnet to check is the service
running.
I made the same mistake at first!! DUH! :-o
Use netstat:

$ netstat -anp |grep 8020
udp6 0 0 127.0.0.1:8020 :::*
-

Make sure the snmp.acl file has correct permissions and ownership as
described.

Use snmpwalk from net-snmp-utils or other mib browser tools to check it's
working.
See the faq for getting through connection errors or authentication errors.
mbrowser also worked and you can load in JVM MIB and see the names of the
parameters you are looking at.
Put the mib under /usr/share/snmp/mibs for snmpwalk to use.

$ yum -y install net-snmp net-snmp-utils
$ snmpbulkwalk -mALL -v2c -cpublic localhost:8020 .

$ yum -y install mbrowser

Same instructions but with link to MIB used JVM-MANAGEMENT-MIB.mib
https://docs.oracle.com/javase/1.5.0/docs/guide/management/SNMP.html
https://docs.oracle.com/javase/1.5.0/docs/guide/management/faq.html
https://docs.oracle.com/javase/1.5.0/docs/guide/management/JVM-MANAGEMENT-MIB.mib

OID 1.3.6.1.4.1.42 == enterprises.sun ==
.iso.org.dod.internet.private.enterprises.sun
http://www.oid-info.com/cgi-bin/display?oid=1.3.6.1.4.1.42


I'm running jenkins under docker so "docker logs <containerid>" is helpful
in case of errors.
(docker run jenkins.sh which calls java <args> -jar jenkins.war).

My docker run port mapping like this:

-p $HOSTIP:8020:8020

Passing args like this including interface=0.0.0.0 to make it bind global
not the local interface inside container:

-Dcom.sun.management.snmp.acl.file=/var/jenkins_home/snmp.acl
-Dcom.sun.management.snmp.port=8020
-Dcom.sun.management.snmp.interface=0.0.0.0



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