make-alex/docker-secg

Prometheus SNMP exporter configuration generator in a docker container

SNMP exporter config generator

The config generator uses NetSNMP to parse MIBs, and generates configs for the Prometheus snmp_exporter using them. This is a docker container built to facilitate the config generation, it is built from scratch starting from Alpine Linux and SNMP exporter config generator source code SNMP exporter config generator.

Requirements

• docker
• your device MIBs

How to run it

For demo purposes I've added the Palo Alto firewall mibs to this repo.

• Clone this repo
• Run the aabbate/secg container mounting the MIBs directory, the generator.yml file and the empty snmp.yml file

$  docker run --rm -v "$PWD/mibs:/root/.snmp/mibs" \
	-v "$PWD/generator.yml:/root/go/src/github.com/prometheus/snmp_exporter/generator/generator.yml" \
	-v "$PWD/snmp.yml:/root/go/src/github.com/prometheus/snmp_exporter/generator/snmp.yml" aabbate/secg

• Once completed, you will find the generated configuration on the snmp.yml file, which can be used on your SNMP-exporter installation.

Volumes mounts

In order to generate the configuration you need to set the following mounts:

• the MIBS volume: where you will put your mibs
  • bind your directory with /root/.snmp/mibs
• the generator.yml file: where the generator will get the OIDs to walk
  • bind your file with /root/go/src/github.com/prometheus/snmp_exporter/generator/generator.yml
• the snmp.yml file: where you will find the generated configuration for SNMP-exporter
  • bind your file with /root/go/src/github.com/prometheus/snmp_exporter/generator/snmp.yml

Container tags

The aabbate/secg container follows the snmp_exporter tag/release naming convention. The tag latest is the latest tag version released on snmp_exporter repository.

To generate your custom configuration:

• Execute a snmpwalk on your device in order to get the right OIDs
• Clone this repo
• Edit the generator.yml adding your OIDs
• Copy your MIBs files on mibs directory
• Run the aabbate/secg container mounting:
  • the mibs directory to /root/.snmp/mibs
  • the empty snmp.yml to /root/go/src/github.com/prometheus/snmp_exporter/generator/snmp.yml
  • your custom generator.yml file to /root/go/src/github.com/prometheus/snmp_exporter/generator/generator.yml
• Get the configuration from the updated snmp.yml file.