first commit

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in fluent-plugin-snmp.gemspec
+gemspec
+gem 'polling', :https => 'https://github.com/iij/polilng.git'

LICENSE.txt

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+Copyright (c) 2012, Internet Initiative Japan Inc.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

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+# Fluent::Plugin::Snmp
+
+Fluent plugin from snmp
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'fluent-plugin-snmp'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install fluent-plugin-snmp
+
+## Usage
+
+    <source>                                                          
+      type snmp                                                         
+      tag snmp.server1                                                  
+      nodes name, value                                                 
+      host server1                                                    
+      community private                                                 
+      version 2c                                                        
+      mib hrStorageIndex, hrStorageDescr, hrStorageSize, hrStorageUsed  
+      mib_modules HOST-RESOURCES-MIB                                    
+      retries 0                                                         
+      timeout 3s                                                        
+      polling_time 0,10,20,30,40,50                                     
+    </source>                                                         
+
+    <source>                                                          
+      type snmp                                                         
+      tag snmp.server2                                                  
+      nodes name, value                                                 
+      host server2                                                    
+      community private                                                 
+      version 2c                                                        
+      mib hrStorageIndex, hrStorageDescr,
+      hrStorageSize, hrStorageUsed  
+      mib_modules HOST-RESOURCES-MIB                                    
+      retries 0                                                         
+      timeout 3s                                                        
+      polling_time 5,15,25,35,45,55                                     
+    </source>                                                         
+
+## Copyright
+Copyright (c) 2012 Internet Initiative Inc.
+Apache Licence, Version 2.0

Rakefile

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+#!/usr/bin/env rake
+require "bundler/gem_tasks"
+require 'rake/testtask'
+Rake::TestTask.new(:test) do |test|
+  test.libs << 'lib' << 'test'
+  test.pattern = 'test/**/test_*.rb'
+  test.verbose = true
+end
+
+task :default => :test

fluent-plugin-snmp.gemspec

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+# -*- encoding: utf-8 -*-
+$:.push File.expand_path("../lib", __FILE__)
+
+Gem::Specification.new do |gem|
+  gem.name          = "fluent-plugin-snmp"
+  gem.version       = "0.0.1"
+  gem.authors       = ["Hiroshi Sugimoto"]
+  gem.email         = ["h-sugimoto@iij.ad.jp"]
+  gem.description   = %q{Input plugin to walk snmp}
+  gem.summary       = %q{Input plugin to walk snmp}
+
+  gem.files         = `git ls-files`.split($\)                                    
+  gem.executables   = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
+  gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
+  gem.require_paths = ["lib"]
+
+  gem.add_development_dependency "fluentd"
+  gem.add_development_dependency "snmp"
+  gem.add_runtime_dependency "fluentd"
+  gem.add_runtime_dependency "snmp"
+end

lib/fluent/plugin/in_snmp.rb

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+require 'snmp' # http://snmplib.rubyforge.org/doc/index.html
+require 'polling' # https://github.com/iij/polling.git
+
+module Fluent
+  class SnmpInput < Input
+    Plugin.register_input('snmp', self)
+
+    # Fluent Params
+    # require param: tag, mib
+    config_param :tag, :string
+    config_param :mib, :string
+    config_param :nodes, :string, :default => nil 
+    config_param :polling_time, :string, :default => nil
+    config_param :host_name, :string, :default => nil
+
+    # SNMP Lib Params
+    # require param: host, community
+    #
+    # Option              Default Value
+    # --------------------------------------
+    # :host               'localhost'
+    # :port               161
+    # :trap_port          162
+    # :community          'public'
+    # :write_community    Same as :community
+    # :version            :SNMPv2c
+    # :timeout            1 (timeout units are seconds)
+    # :retries            5
+    # :transport          UDPTransport
+    # :max_recv_bytes     8000 bytes
+    # :mib_dir            MIB::DEFAULT_MIB_PATH
+    # :mib_modules        SNMPv2-SMI, SNMPv2-MIB, IF-MIB, IP-MIB, TCP-MIB, UDP-MIB
+    # :use_IPv6           false, unless :host is formatted like an IPv6 address
+    config_param :host, :string
+    config_param :port, :integer, :default => nil
+    config_param :trap_port, :integer, :default => nil
+    config_param :community, :string
+    config_param :write_community, :string, :default => nil
+    config_param :version, :string, :default => nil # Use :SNMPv1 or :SNMPv2c
+    config_param :timeout, :time, :default => nil
+    config_param :retries, :integer, :default => nil
+    config_param :transport, :string, :default => nil
+    config_param :max_recv_bytes, :string, :default => nil
+    config_param :mib_dir, :string, :default => nil
+    config_param :mib_modules, :string, :default => nil
+    config_param :use_IPv6, :string, :default => nil
+
+    def initialize
+      super
+    end  
+
+    def configure(conf)                                                         
+      super
+
+      raise ConfigError, "tag is required param" if @tag.empty?
+
+      # @mib, @mib_modules, @nodesを配列に変換
+      @mib = @mib.split(',').map{|str| str.strip} 
+      raise ConfigError, "snmp: 'mib' parameter is required on snmp input" if @mib.empty?
+
+      @mib_modules = @mib_modules.split(',').map{|str| str.strip} unless @mib_modules.nil?
+      raise ConfigError, "snmp: 'mib_modules' parameter is required on snmp input" if !@mib_modules.nil? && @mib_modules.empty?
+
+      @nodes = @nodes.split(',').map{|str| str.strip} unless @nodes.nil?
+      raise ConfigError, "snmp: 'nodes' parameter is required on snmp input" if !@nodes.nil? && @nodes.empty?
+
+      @polling_time = @polling_time.split(',').map{|str| str.strip.to_i} unless @polling_time.nil?
+      raise ConfigError, "snmp: 'polling_time' parameter is required on snmp input" if !@polling_time.nil? && @polling_time.empty?
+
+      # snmp version
+      @version = @version == "1" ? :SNMPv1 : :SNMPv2c
+
+      # SNMP Libraryの初期値を設定
+      @snmp_init_params = {
+        :host            => @host, #or conf["host"]
+        :port            => @port,
+        :trap_port       => @trap_port,
+        :community       => @community,
+        :write_community => @write_community,
+        :version         => @version,
+        :timeout         => @timeout,
+        :retries         => @retries,
+        :transport       => @transport,
+        :max_recv_bytes  => @max_recv_bytes,
+        :mib_dir         => @mib_dir,
+        :mib_modules     => @mib_modules,
+        :use_IPv6        => @use_IPv6
+      }
+    end
+
+    def starter
+      @starter = Thread.new do
+        yield
+      end
+    end
+
+    def start
+      starter do
+        @manager = SNMP::Manager.new(@snmp_init_params)
+        @thread = Thread.new(&method(:run))
+        @end_flag = false
+      end
+    end
+
+    def run
+      Polling::run(@polling_time,true) do
+        snmpwalk(@manager, @mib, @nodes)
+        break if @end_flag
+      end
+    rescue => ex
+      $log.error "run failed", :error=>ex.message
+      sleep(10)
+      retry
+    end
+
+    #Ctrl-cで処理を停止時に呼ばれる
+    def shutdown
+      @end_flag = true
+      @thread.run
+      @thread.join
+      @starter.join
+      @manager.close 
+    end
+
+    private
+
+    def snmpwalk(manager, mib, nodes = nil, test = false)
+      manager.walk(mib) do |row|
+        time = Engine.now 
+        time = time - time % 5
+        record = Hash.new
+        row.each do |vb|
+          if nodes.nil?
+            record["mib"] = vb
+          else
+            nodes.each{|param| record[param] = check_type(vb.__send__(param))}
+          end
+          Engine.emit(@tag, time, record)
+          return {:time => time, :record => record} if test
+        end
+      end
+    end
+
+    # SNMPで取得したデータの型チェック
+    def check_type(value)
+      if value =~ /^\d+(\.\d+)?$/ 
+        return value.to_f
+      else
+        return value.to_s
+      end
+    rescue => ex
+      $Log.error "snmp failed to check_type", :error=>ex.message
+      $log.warn_backtrace ex.backtrace
+    end
+
+  end
+end

test/helper.rb

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+require 'test/unit'
+
+$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
+$LOAD_PATH.unshift(File.dirname(__FILE__))
+
+require 'fluent/test'
+
+unless ENV.has_key?('VERBOSE')
+  nulllogger = Object.new
+  nulllogger.instance_eval {|obj|
+    def method_missing(method, *args)
+      # pass
+    end
+  }
+  $log = nulllogger
+end
+
+require 'fluent/plugin/in_snmp'
+
+class Test::Unit::TestCase
+end
+

test/plugin/hoge.rb

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+require 'helper'
+require 'flexmock'
+
+class SnmpInputTest < Test::Unit::TestCase
+  include FlexMock::TestCase
+
+  def setup
+    Fluent::Test.setup
+  end
+
+  CONFIG = %[
+    tag snmp.server1
+    mib hrStorageIndex, hrStorageDescr, hrStorageSize, hrStorageUsed
+    nodes name, value
+    polling_time 0,10,20,30,40,50
+    polling_interval 60s
+    host localhost
+    community private
+    mib_modules HOST-RESOURCES-MIB, IF-MIB
+    retries 0
+    timeout 3s
+  ]
+
+  def create_driver(conf=CONFIG)
+    Fluent::Test::InputTestDriver.new(Fluent::SnmpInput).configure(conf)
+  end
+
+  def test_configure
+    d = create_driver
+
+    # Fluent Params
+    assert_equal "snmp.server1", d.instance.tag
+    assert_equal ["hrStorageIndex","hrStorageDescr","hrStorageSize","hrStorageUsed"], d.instance.mib
+    assert_equal ["name","value"], d.instance.nodes
+    assert_equal [0,10,20,30,40,50], d.instance.polling_time
+    assert_equal 60, d.instance.polling_interval
+
+    # SNMP Lib Params
+    assert_equal "localhost", d.instance.host
+    assert_nil d.instance.port
+    assert_nil d.instance.trap_port
+    assert_equal "private", d.instance.community
+    assert_nil d.instance.write_community
+    assert_equal :SNMPv2c, d.instance.version
+    assert_equal 3, d.instance.timeout
+    assert_equal 0, d.instance.retries
+    assert_nil d.instance.transport
+    assert_nil d.instance.max_recv_bytes
+    assert_nil d.instance.mib_dir
+    assert_equal ["HOST-RESOURCES-MIB","IF-MIB"], d.instance.mib_modules
+    assert_nil d.instance.use_IPv6
+  end
+
+  def test_run
+    d = create_driver
+
+    snmp_init_params = {
+      :host => d.instance.host,
+      :port => d.instance.host,
+      :trap_port => d.instance.trap_port,
+      :community => d.instance.community,
+      :write_community => d.instance.write_community,
+      :version => d.instance.version,
+      :timeout => d.instance.timeout,
+      :retries => d.instance.retries,
+      :transport => d.instance.transport,
+      :max_recv_bytes => d.instance.max_recv_bytes,
+      :mib_dir => d.instance.mib_dir,
+      :mib_modules => d.instance.mib_modules,
+      :use_IPv6 => d.instance.use_IPv6
+    }
+  end
+
+  def test_check_type
+    d = Fluent::SnmpInput.new
+    hoge = d.check_type("hoge")
+    assert_equal "hoge",hoge
+  end
+
+end