Class: LogStash::Inputs::File

Inherits:
Base show all
Defined in:
lib/logstash/inputs/file.rb

Overview

Stream events from files.

By default, each event is assumed to be one line. If you want to join lines, you’ll want to use the multiline filter.

Files are followed in a manner similar to “tail -0F”. File rotation is detected and handled by this input.

Constant Summary

Constants included from Config::Mixin

Config::Mixin::CONFIGSORT

Instance Attribute Summary

Attributes inherited from Base

#params, #threadable

Attributes included from Config::Mixin

#config, #original_params

Attributes inherited from Plugin

#logger, #params

Instance Method Summary collapse

Methods inherited from Base

#initialize, #tag

Methods included from Config::Mixin

#config_init, included

Methods inherited from Plugin

#eql?, #finished, #finished?, #hash, #initialize, #inspect, lookup, #reload, #running?, #shutdown, #terminating?, #to_s

Constructor Details

This class inherits a constructor from LogStash::Inputs::Base

Instance Method Details

#register ⇒ Object 



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# File 'lib/logstash/inputs/file.rb', line 66

def register
  require "addressable/uri"
  require "filewatch/tail"
  require "digest/md5"
  @logger.info("Registering file input", :path => @path)

  @tail_config = {
    :exclude => @exclude,
    :stat_interval => @stat_interval,
    :discover_interval => @discover_interval,
    :sincedb_write_interval => @sincedb_write_interval,
    :logger => @logger,
  }

  @path.each do |path|
    if Pathname.new(path).relative?
      raise ArgumentError.new("File paths must be absolute, relative path specified: #{path}")
    end
  end

  if @sincedb_path.nil?
    if ENV["SINCEDB_DIR"].nil? && ENV["HOME"].nil?
      @logger.error("No SINCEDB_DIR or HOME environment variable set, I don't know where " \
                    "to keep track of the files I'm watching. Either set " \
                    "HOME or SINCEDB_DIR in your environment, or set sincedb_path in " \
                    "in your logstash config for the file input with " \
                    "path '#{@path.inspect}'")
      raise # TODO(sissel): HOW DO I FAIL PROPERLY YO
    end

    #pick SINCEDB_DIR if available, otherwise use HOME
    sincedb_dir = ENV["SINCEDB_DIR"] || ENV["HOME"]

    # Join by ',' to make it easy for folks to know their own sincedb
    # generated path (vs, say, inspecting the @path array)
    @sincedb_path = File.join(sincedb_dir, ".sincedb_" + Digest::MD5.hexdigest(@path.join(",")))

    # Migrate any old .sincedb to the new file (this is for version <=1.1.1 compatibility)
    old_sincedb = File.join(sincedb_dir, ".sincedb")
    if File.exists?(old_sincedb)
      @logger.info("Renaming old ~/.sincedb to new one", :old => old_sincedb,
                   :new => @sincedb_path)
      File.rename(old_sincedb, @sincedb_path)
    end

    @logger.info("No sincedb_path set, generating one based on the file path",
                 :sincedb_path => @sincedb_path, :path => @path)
  end

  @tail_config[:sincedb_path] = @sincedb_path

  if @start_position == "beginning"
    @tail_config[:start_new_files_at] = :beginning
  end
end

#run(queue) ⇒ Object 



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# File 'lib/logstash/inputs/file.rb', line 123

def run(queue)
  @tail = FileWatch::Tail.new(@tail_config)
  @tail.logger = @logger
  @path.each { |path| @tail.tail(path) }
  hostname = Socket.gethostname

  @tail.subscribe do |path, line|
    @logger.debug? && @logger.debug("Received line", :path => path, :text => line)
    @codec.decode(line) do |event|
      decorate(event)
      event["host"] = hostname
      event["path"] = path
      queue << event
    end
  end
  finished
end

#teardown ⇒ Object 



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# File 'lib/logstash/inputs/file.rb', line 142

def teardown
  @tail.sincedb_write
  @tail.quit
end