This is an exporter that exposes information gathered from SNMP for use by the Prometheus monitoring system.
There are two components. An exporter that does the actual scraping, and a generator (which depends on NetSNMP) that creates the configuration for use by the exporter.
Binaries can be downloaded from the Github releases page.
./snmp_exporter
Visit http://localhost:9116/snmp?target=1.2.3.4 where 1.2.3.4 is the IP of the
SNMP device to get metrics from. You can also specify a module parameter, to
choose which module to use from the config file.
The snmp exporter reads from a snmp.yml config file by default. This file is
not intended to be written by hand, rather use the generator to
generate it for you.
The default snmp.yml covers a variety of common hardware for which
MIBs are available to the public, walking them using SNMP v2 GETBULK.
You'll need to use the generator in all but the simplest of setups. It is needed to customise which objects are walked, use non-public MIBs or specify authentication parameters.
The snmp exporter needs to be passed the address as a parameter, this can be done with relabelling.
Example config:
scrape_configs:
- job_name: 'snmp'
static_configs:
- targets:
- 192.168.1.2 # SNMP device.
metrics_path: /snmp
params:
module: [if_mib]
relabel_configs:
- source_labels: [__address__]
target_label: __param_target
- source_labels: [__param_target]
target_label: instance
- target_label: __address__
replacement: 127.0.0.1:9116 # SNMP exporter.This setup allows Prometheus to provide scheduling and service discovery, as unlike all other exporters running an exporter on the machine from which we are getting the metrics from is not possible.