Class: Fluent::PullForwardInput

Inherits:
Input
  • Object
show all
Defined in:
lib/fluent/plugin/in_pull_forward.rb

Constant Summary collapse

DEFAULT_PULLFORWARD_LISTEN_PORT = 
24280

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PullForwardInput 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 21

def initialize
  super
  require 'resolve/hostname'
  require 'net/http'
  require 'net/https'
  require 'openssl'
  require 'yajl'
end

Instance Attribute Details

#hostname_resolver ⇒ Object (readonly)

Returns the value of attribute hostname_resolver.



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 19

def hostname_resolver
  @hostname_resolver
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 35

def configure(conf)
  super

  @verify_mode = if @allow_self_signed_certificate
                   OpenSSL::SSL::VERIFY_NONE
                 else
                   OpenSSL::SSL::VERIFY_PEER
                 end
  @resolver = Resolve::Hostname.new(:system_resolver => true)
end

#fetch(server) ⇒ Object 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 74

def fetch(server)
  body = nil

  begin
    address = @resolver.getaddress(server.host)
    https = Net::HTTP.new(address, server.port)
    https.open_timeout = @timeout
    https.read_timeout = @timeout
    https.use_ssl = true
    https.verify_mode = @verify_mode

    req = Net::HTTP::Get.new('/')
    req.basic_auth server.username, server.password

    res = https.start{ https.request(req) }
    if res && res.is_a?(Net::HTTPSuccess)
      body = res.body
    else
      log.warn "failed to GET from Fluentd PullForward: #{server.host}, #{address}:#{server.port}, by #{res.class}"
    end
  rescue IOError, EOFError, SystemCallError => e
    log.warn "net/http GET raised an exception: #{e.class}, '#{e.message}'"
  end
  return unless body

  data = nil
  begin
    data = Yajl::Parser.parse(body)
  rescue => e
    # maybe parse error
    log.warn "an error occured for parse of transferred content: #{e.class}, '#{e.message}'"
  end
  return unless data

  bundle = {}
  data.each do |tag, time, record|
    bundle[tag] ||= Fluent::MultiEventStream.new
    bundle[tag].add(time, record)
  end
  bundle.each do |tag, es|
    Fluent::Engine.emit_stream(tag, es)
  end
end

#fetcher ⇒ Object 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 58

def fetcher
  next_fetch = Time.now
  while @running
    if Time.now >= next_fetch
      @servers.each do |server|
        if @running
          fetch(server)
        end
      end
      next_fetch = Time.now + @fetch_interval
    end
    break unless @running
    sleep 1
  end
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 52

def shutdown
  super
  @running = false
  @thread.join
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/in_pull_forward.rb', line 46

def start
  super
  @running = true
  @thread = Thread.new(&method(:fetcher))
end