snmp multi module support

[v-zhuravlev]

What's wrong?

I'm trying to use multi module functionality of https://github.com/prometheus/snmp_exporter in snmp exporter of alloy.

Does alloy support multi module polling the same way upstream exporter?

Alloy version:
alloy --version
alloy, version v1.5.1 (branch: HEAD, revision: dc8a365)
build user: root@19aa8bb023d9
build date: 2024-12-03T16:39:10Z
go version: go1.22.7
platform: linux/arm64
tags: netgo,builtinassets,promtail_journal_enabled

snmp_exporter standalone version:
snmp_exporter-0.27.0.linux-arm64

Steps to reproduce

1. Setup alloy in with snmp config:

prometheus.exporter.snmp "integrations_snmp" {

target "snmp_sample_app" {
    address = "127.0.0.1"
    module  = "if_mib"
    auth    = "public_v2"
  }
}

Then try to run

 curl -k "http://localhost:12345/api/v0/component/prometheus.exporter.snmp.integrations_snmp/metrics?auth=public_v2&name=snmp_sampl
e_app&module=if_mib,cisco_wlc&target=127.0.0.1"

Unknown module 'if_mib,cisco_wlc'

Try the same with snmp_exporter:

./snmp_exporter &
curl -k "http://localhost:9116/snmp?module=if_mib,cisco_wlc&target=127.0.0.1&auth=public_v2"

and you would get metrics output or errror like "socket: read udp 127.0.0.1:33610->127.0.0.1:161: recvfrom: connection refused" if snmpd is not setup . Anyway, you would pass "Unknown module" error you get in alloy.

[Nachtfalkeaw]

@v-zhuravlev
Alloy 1.5.1 was released in Dezember 2024 and snmp_exporter in january 2025. I think it is Impossible to have a new Feature in an old Version.

And alloy 1.6.x does Not list any snmp_exporter Changes
https://github.com/grafana/alloy/blob/main/CHANGELOG.md

And Here the alloy snmp config documentation
https://grafana.com/docs/alloy/latest/reference/components/prometheus/prometheus.exporter.snmp/