snmp-exporter missing metrics

[-MoNsTeRRR]

Hello,

I'm trying to get metrics from an Unifi devices (UAP AC-Lite) and some metrics are missing.

snmp-exporter doesn't give me any metrics regarding OID 1.3.6.1.4.1.41112 (I got all metrics of OID 1.3.6.1.2.1.31.1.1 and 1.3.6.1.2.1.2)

I use snmp.yml in snmp-exporter repository => https://github.com/prometheus/snmp_exporter/blob/master/snmp.yml

Debug mode doesn't provide me relevant informations

level=info ts=2020-07-31T12:33:08.703Z caller=main.go:149 msg="Starting snmp_exporter" version="(version=0.18.0, branch=HEAD, revision=9a2ff257dd2e8cdb2a4c88b18df668e2008c2cd6)"
level=info ts=2020-07-31T12:33:08.703Z caller=main.go:150 build_context="(go=go1.14.3, user=root@84ec61d89273, date=20200526-08:26:47)"
level=info ts=2020-07-31T12:33:08.714Z caller=main.go:243 msg="Listening on address" address=:9117
level=debug ts=2020-07-31T12:33:12.900Z caller=main.go:99 module=ubiquiti_unifi target=<IP> msg="Starting scrape"
level=debug ts=2020-07-31T12:33:12.901Z caller=collector.go:131 module=ubiquiti_unifi target=<IP> msg="Getting OIDs" oids=1
level=debug ts=2020-07-31T12:33:12.902Z caller=collector.go:140 module=ubiquiti_unifi target=<IP> msg="Get of OIDs completed" oids=1 duration_seconds=499.635µs
level=debug ts=2020-07-31T12:33:12.902Z caller=collector.go:164 module=ubiquiti_unifi target=<IP> msg="Walking subtree" oid=1.3.6.1.2.1.2
level=debug ts=2020-07-31T12:33:12.912Z caller=collector.go:177 module=ubiquiti_unifi target=<IP> msg="Walk of subtree completed" oid=1.3.6.1.2.1.2 duration_seconds=9.983895ms
level=debug ts=2020-07-31T12:33:12.912Z caller=collector.go:164 module=ubiquiti_unifi target=<IP> msg="Walking subtree" oid=1.3.6.1.2.1.31.1.1
level=debug ts=2020-07-31T12:33:12.916Z caller=collector.go:177 module=ubiquiti_unifi target=<IP> msg="Walk of subtree completed" oid=1.3.6.1.2.1.31.1.1 duration_seconds=3.806607ms
level=debug ts=2020-07-31T12:33:12.916Z caller=collector.go:164 module=ubiquiti_unifi target=<IP> msg="Walking subtree" oid=1.3.6.1.4.1.41112.1.6
level=debug ts=2020-07-31T12:33:12.917Z caller=collector.go:177 module=ubiquiti_unifi target=<IP> msg="Walk of subtree completed" oid=1.3.6.1.4.1.41112.1.6 duration_seconds=348.113µs
level=debug ts=2020-07-31T12:33:12.921Z caller=main.go:110 module=ubiquiti_unifi target=<IP> msg="Finished scrape" duration_seconds=0.020435814

snmpbulkwalk -v 2c -c <community> <IP> 1.3.6.1.4.1.41112.1.6

iso.3.6.1.4.1.41112.1.6.1.1.1.1.1 = INTEGER: 0
iso.3.6.1.4.1.41112.1.6.1.1.1.1.2 = INTEGER: 1
iso.3.6.1.4.1.41112.1.6.1.1.1.2.1 = STRING: "wifi0"
iso.3.6.1.4.1.41112.1.6.1.1.1.2.2 = STRING: "wifi1"
iso.3.6.1.4.1.41112.1.6.1.1.1.3.1 = STRING: "ng"
iso.3.6.1.4.1.41112.1.6.1.1.1.3.2 = STRING: "na"
iso.3.6.1.4.1.41112.1.6.1.1.1.4.1 = Counter32: 6062338
iso.3.6.1.4.1.41112.1.6.1.1.1.4.2 = Counter32: 265163
iso.3.6.1.4.1.41112.1.6.1.1.1.5.1 = Counter32: 713814
iso.3.6.1.4.1.41112.1.6.1.1.1.5.2 = Counter32: 1080

etc....

i'm using snmp-exporter version 0.18.0

Best regards,

[Ben Kochie]

That's pretty strange. The log looks right, but the duration for the OID seems extremely short, like the AP didn't return any data to the exporter. I have some APs that respond to these metrics just fine to the snmp_exporter.

Maybe worth doing a tcpdump capture to see what's going over the wire?

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[-MoNsTeRRR]

After future investigations, it does appear that Unifi OID are not responding in IPv6

snmpbulkwalk -v 2c -c <community> <IPv6> 1.3.6.1.2.1.2.2.1.7
iso.3.6.1.2.1.2.2.1.7.1 = INTEGER: 1
iso.3.6.1.2.1.2.2.1.7.2 = INTEGER: 1

snmpbulkwalk -v 2c -c <community> <IPv6> 1.3.6.1.4.1.41112.1.6
iso.3.6.1.4.1.41112.1.6 = No Such Object available on this agent at this OID

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[-MoNsTeRRR]

snmp-exporter doesn't support an option like on blackbox exporter "preferred_ip_protocol" to query in ipv4 instead on ipv6 for some hostnames ?

[Ben Kochie]

No, I don't think so, it only takes the OS level IP protocol priorities.

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[-MoNsTeRRR]

Thanks for your help I will open a feature request on snmp-exporter github

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