elixir-snmp

Have you tried to integrate SNMP in your application but afraid of OTP snmp documentation ? elixir-snmp may be the answer.

Installation

The package can be installed by adding elixir_snmp to your list of dependencies in mix.exs :

def deps do
  [
    {:elixir_snmp, "~> 0.1.0"}
  ]
end

The docs can be found at https://hexdocs.pm/elixir_snmp.

Quickstart

elixir_snmp provides DSL and macros for easily:

• Instrumenting MIBs, ie creates functions that map MIB variables accesses to elixir code;
• Describing SNMP agent and its configuration.

Instrumenting MIB

• Instrument a MIB with generic (mnesia) functions:

defmodule MyMib do
  use Snmp.Mib,
    name: "MY-MIB",
    instrumentation: Snmp.Instrumentation.Generic
end

• Instrument a MIB with your own functions (see Definition of Instrumentation Functions for signature):

defmodule MyMib do
  use Snmp.Mib,
    name: "MY-MIB"

  def my_variable(:get), do: {:value, "value"}

  def my_rw_variable(:get), do: {:value, "value"}

  def my_rw_variable(:set, val), do: :noError
end

See Snmp.Mib documentation for advanced instructions.

Defining Agent

defmodule Agent do
  use Snmp.Agent

  # Mandatory MIBs
  mib MyApp.Mib.Standard
  mib MyApp.Mib.Framework

  # Application MIBs
  mib MyMib

  # VACM model
  view :public do
    include [1, 3, 6, 1, 2, 1]
  end

  view :private do
    include [1, 3, 6]
  end

  access :public,
    versions: [:v1, :v2c, :usm],
    level: :noAuthNoPriv,
    read_view: :public

  access :secure,
    versions: [:usm],
    level: :authPriv,
    read_view: :private,
    write_view: :private,
    notify_view: :private
end

Then, in your application env, defines some users:

config :my_app, Agent,
  versions: [:v1, :v2, :v3],
  port: "SNMP_PORT" |> System.get_env("4000") |> String.to_integer(),
  transports: ["127.0.0.1"],
  security: [
    [user: "public", access: :public]
    [user: "admin", password: "adminpassword", access: [:public, :secure]]
  ]

See Snmp.Agent for advanced Agent DSL usage and configuration.