Nginx application from another host doesn't display data

Help
1

Hi,

I have a running librenms installation on hostA which is working without problems. I have some applications successfully collecting data, including nginx on localhost. I now have another nginx installation on hostB from which i would like to collect nignx application data as well.

System setup:

Version 1.39-70-g57a23a754 - Fri May 18 2018 10:40:34 GMT+0200
DB Schema #250
Web Server nginx/1.10.3
PHP 7.0.27-0+deb9u1
MySQL 10.1.23-MariaDB-9+deb9u1
RRDtool 1.6.0

validate.php all ok

Setup hostB:

root@hostB:/etc/snmp# ./nginx-stats 
1
0
1
0 
587

extends in snmpd.conf (raspberry is working fine):

extend raspberry /etc/snmp/raspberry.sh
extend nginx     /etc/snmp/nginx-stats

What i get on hostA

After discovery for hostB:

Settings:
image

Graphs:
image

Part of the output of ./poller.php -h hostB -d -r -f -m applications

SNMP[/usr/bin/snmpget -v3 -n '' -l 'authPriv' -a 'SHA' -A PASSWORD -u USER -x 'DES' -X PASSWORD -Ovq -M /opt/librenms/mibs:/opt/librenms/mibs/supermicro:/opt/librenms/mibs/dell udp:HOSTNAME:161 .1.3.6.1.4.1.8072.1.3.2.3.1.2.5.110.103.105.110.120]
1
0
1
0 
587

 nginxactive: 1 reading: 0 writing: 1 waiting: 0 Requests: 580
RRD[update /opt/librenms/rrd/privacypi/app-nginx-7.rrd N:580:1:0:1:0]
[RRD Disabled]SQL[UPDATE `applications` set `app_state` ='OK',`app_status` ='',`timestamp` =NOW() WHERE `app_id` = '7'] 
SQL[SELECT * FROM `application_metrics` WHERE app_id='7'] 
: SQL[UPDATE `application_metrics` set `value` ='580',`value_prev` ='579' WHERE app_id='7' && metric='Requests'] 
U....


>> Runtime for poller module 'applications': 0.5375 seconds with 4256 bytes

For me it seams everything should be in place but the database update is not successful. Did i miss something?

Thanks in advance for any help
Martin

P.S.: The poller output for the working localhost nginx app:

SNMP[/usr/bin/snmpget -v2c -c COMMUNITY -Ovq -M /opt/librenms/mibs:/opt/librenms/mibs/supermicro:/opt/librenms/mibs/dell udp:HOSTNAME:161 .1.3.6.1.4.1.8072.1.3.2.3.1.2.5.110.103.105.110.120]
1
0
1
0 
194404

 nginxactive: 1 reading: 0 writing: 1 waiting: 0 Requests: 194404
RRD[update /opt/librenms/rrd/localhost/app-nginx-2.rrd N:194404:1:0:1:0]
[RRD Disabled]SQL[UPDATE `applications` set `app_state` ='OK',`app_status` ='',`timestamp` =NOW() WHERE `app_id` = '2'] 
SQL[SELECT * FROM `application_metrics` WHERE app_id='2'] 
: SQL[UPDATE `application_metrics` set `value` ='194404',`value_prev` ='194290' WHERE app_id='2' && metric='Requests'] 
USQL[UPDATE `application_metrics` set `value` ='1',`value_prev` ='2' WHERE app_id='2' && metric='Active'] 
U..SQL[UPDATE `application_metrics` set `value` ='0',`value_prev` ='1' WHERE app_id='2' && metric='Waiting'] 
U
2

I’m replying to my own post. Since I found what i was missing. Maybe it helps someone else.

The “validate all ok” was basically before I started the whole process of adding the nginx app to hostB. It turned out, that i ran the first discovery after adding nginx app on hostB as root which resulted in the rrd files having the wrong ownership. Validating again in the web UI revealed it for me.

After “chown -R librenms: /opt/librenms” it is working now:

image
image452×636 54 KB

Regardless, thanks for this great tool and the good information base.
Martin