Re: NULL result with net-snmp-5.9.4_1,1

On Sat, Jun 01, 2024 at 11:35:02AM -0400, Dan Langille wrote:
> On Sun, May 26, 2024, at 2:00 AM, Budi Janto wrote:
> > Hi,
> >
> > I need some help with Net-SNMP packages for monitoring CPU temperature.
> >
> > # uname -smr
> > FreeBSD 14.0-RELEASE-p5 amd64
> >
> > # pkg info | grep net-snmp
> > net-snmp-5.9.4_1,1             Extendable SNMP implementation
> >
> > # sh x/snmp-cpu-temperature.sh
> > 30.0
> > 29.0
> > 28.0
> > 28.0
> > 29.0
> > 29.0
> > 29.0
> > 29.0
> > 30.0
> > 28.0
> > 28.0
> > 27.0
> >
> > # snmpwalk -v2c -c public localhost . | grep 
> > 'NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature"'
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".1 = STRING:
> >
> > That's NULL result.
> >
> > But, I changed to net-snmp-5.9.4,1 version.
> > # pkg info | grep net-snmp
> > net-snmp-5.9.4,1               Extendable SNMP implementation

I believe that in net-snmp-5.9.4_1,1, snmpd is running as the "snmpd"
user rather than as root.  Can you confirm this?  net-snmp-5.9.4_2,1
reverts back to running as root.  Does that fix the problem for you?

What is in your snmp-cpu-temperature.sh script?  Does it need to run as
root?  (I'd be a bit surprised if so.)

> >
> > # snmpwalk -v2c -c public localhost . | grep 
> > 'NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature"'
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".1 = STRING: 35.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".2 = STRING: 35.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".3 = STRING: 38.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".4 = STRING: 38.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".5 = STRING: 38.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".6 = STRING: 38.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".7 = STRING: 36.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".8 = STRING: 36.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".9 = STRING: 39.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".10 = STRING: 39.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".11 = STRING: 35.0
> > NET-SNMP-EXTEND-MIB::nsExtendOutLine."cpu-temperature".12 = STRING: 36.0
> 
> with net-snmp-5.9.4_2,1 for what it's worth:
> 
> [dvl@besser:~] $ snmpwalk -v3 -l authPriv -u roMinion -a SHA -A $AUTHPASS -X $PRIVPASS -x AES dev-nginx01.int.unixathome.org | grep temperature
> [dvl@besser:~] $ 

This is in the extension MIB, so presumably Budi has some configuration
to add these OIDs.  Did you add something like that?