This came from elasticsearch/logstash at cf2242170011fbf2d264ae876601…

…92754697671a

.gitignore

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+*.gem
+Gemfile.lock
+.bundle
+vendor

Gemfile

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+source 'https://rubygems.org'
+gem 'rake'
+gem 'gem_publisher'
+gem 'archive-tar-minitar'

Rakefile

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+@files=[]
+
+task :default do
+  system("rake -T")
+end
+

lib/logstash/outputs/opentsdb.rb

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+# encoding: utf-8
+require "logstash/outputs/base"
+require "logstash/namespace"
+require "socket"
+
+# This output allows you to pull metrics from your logs and ship them to
+# opentsdb. Opentsdb is an open source tool for storing and graphing metrics.
+#
+class LogStash::Outputs::Opentsdb < LogStash::Outputs::Base
+  config_name "opentsdb"
+  milestone 1
+
+  # Enable debugging.
+  config :debug, :validate => :boolean, :default => false, :deprecated => "This setting was never used by this plugin. It will be removed soon."
+
+  # The address of the opentsdb server.
+  config :host, :validate => :string, :default => "localhost"
+
+  # The port to connect on your graphite server.
+  config :port, :validate => :number, :default => 4242
+
+  # The metric(s) to use. This supports dynamic strings like %{source_host}
+  # for metric names and also for values. This is an array field with key
+  # of the metric name, value of the metric value, and multiple tag,values . Example:
+  #
+  #     [
+  #       "%{host}/uptime",
+  #       %{uptime_1m} " ,
+  #       "hostname" ,
+  #       "%{host}
+  #       "anotherhostname" ,
+  #       "%{host}
+  #     ]
+  #
+  # The value will be coerced to a floating point value. Values which cannot be
+  # coerced will zero (0)
+  config :metrics, :validate => :array, :required => true
+
+  def register
+    connect
+  end # def register
+
+  def connect
+    # TODO(sissel): Test error cases. Catch exceptions. Find fortune and glory.
+    begin
+      @socket = TCPSocket.new(@host, @port)
+    rescue Errno::ECONNREFUSED => e
+      @logger.warn("Connection refused to opentsdb server, sleeping...",
+                   :host => @host, :port => @port)
+      sleep(2)
+      retry
+    end
+  end # def connect
+
+  public
+  def receive(event)
+    return unless output?(event)
+
+    # Opentsdb message format: put metric timestamp value tagname=tagvalue tag2=value2\n
+
+    # Catch exceptions like ECONNRESET and friends, reconnect on failure.
+    begin
+      name = metrics[0]
+      value = metrics[1]
+      tags = metrics[2..-1]
+
+      # The first part of the message
+      message = ['put',
+                 event.sprintf(name),
+                 event.sprintf("%{+%s}"),
+                 event.sprintf(value),
+      ].join(" ")
+
+      # If we have have tags we need to add it to the message
+      event_tags = []
+      unless tags.nil?
+        Hash[*tags.flatten].each do |tag_name,tag_value|
+          # Interprete variables if neccesary
+          real_tag_name = event.sprintf(tag_name)
+          real_tag_value =  event.sprintf(tag_value)
+          event_tags << [real_tag_name , real_tag_value ].join('=')
+        end
+        message+=' '+event_tags.join(' ')
+      end
+
+      # TODO(sissel): Test error cases. Catch exceptions. Find fortune and glory.
+      begin
+        @socket.puts(message)
+      rescue Errno::EPIPE, Errno::ECONNRESET => e
+        @logger.warn("Connection to opentsdb server died",
+                     :exception => e, :host => @host, :port => @port)
+        sleep(2)
+        connect
+      end
+
+      # TODO(sissel): resend on failure
+      # TODO(sissel): Make 'resend on failure' tunable; sometimes it's OK to
+      # drop metrics.
+    end # @metrics.each
+  end # def receive
+end # class LogStash::Outputs::Opentsdb

logstash-output-opentsdb.gemspec

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+Gem::Specification.new do |s|
+
+  s.name            = 'logstash-output-opentsdb'
+  s.version         = '0.1.0'
+  s.licenses        = ['Apache License (2.0)']
+  s.summary         = "This output allows you to pull metrics from your logs and ship them to opentsdb"
+  s.description     = "This output allows you to pull metrics from your logs and ship them to opentsdb"
+  s.authors         = ["Elasticsearch"]
+  s.email           = '[email protected]'
+  s.homepage        = "http://logstash.net/"
+  s.require_paths = ["lib"]
+
+  # Files
+  s.files = `git ls-files`.split($\)+::Dir.glob('vendor/*')
+
+  # Tests
+  s.test_files = s.files.grep(%r{^(test|spec|features)/})
+
+  # Special flag to let us know this is actually a logstash plugin
+  s.metadata = { "logstash_plugin" => "true", "group" => "output" }
+
+  # Gem dependencies
+  s.add_runtime_dependency 'logstash', '>= 1.4.0', '< 2.0.0'
+
+end
+

rakelib/publish.rake

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+require "gem_publisher"
+
+desc "Publish gem to RubyGems.org"
+task :publish_gem do |t|
+  gem_file = Dir.glob(File.expand_path('../*.gemspec',File.dirname(__FILE__))).first
+  gem = GemPublisher.publish_if_updated(gem_file, :rubygems)
+  puts "Published #{gem}" if gem
+end
+

rakelib/vendor.rake

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+require "net/http"
+require "uri"
+require "digest/sha1"
+
+def vendor(*args)
+  return File.join("vendor", *args)
+end
+
+directory "vendor/" => ["vendor"] do |task, args|
+  mkdir task.name
+end
+
+def fetch(url, sha1, output)
+
+  puts "Downloading #{url}"
+  actual_sha1 = download(url, output)
+
+  if actual_sha1 != sha1
+    fail "SHA1 does not match (expected '#{sha1}' but got '#{actual_sha1}')"
+  end
+end # def fetch
+
+def file_fetch(url, sha1)
+  filename = File.basename( URI(url).path )
+  output = "vendor/#{filename}"
+  task output => [ "vendor/" ] do
+    begin
+      actual_sha1 = file_sha1(output)
+      if actual_sha1 != sha1
+        fetch(url, sha1, output)
+      end
+    rescue Errno::ENOENT
+      fetch(url, sha1, output)
+    end
+  end.invoke
+
+  return output
+end
+
+def file_sha1(path)
+  digest = Digest::SHA1.new
+  fd = File.new(path, "r")
+  while true
+    begin
+      digest << fd.sysread(16384)
+    rescue EOFError
+      break
+    end
+  end
+  return digest.hexdigest
+ensure
+  fd.close if fd
+end
+
+def download(url, output)
+  uri = URI(url)
+  digest = Digest::SHA1.new
+  tmp = "#{output}.tmp"
+  Net::HTTP.start(uri.host, uri.port, :use_ssl => (uri.scheme == "https")) do |http|
+    request = Net::HTTP::Get.new(uri.path)
+    http.request(request) do |response|
+      fail "HTTP fetch failed for #{url}. #{response}" if [200, 301].include?(response.code)
+      size = (response["content-length"].to_i || -1).to_f
+      count = 0
+      File.open(tmp, "w") do |fd|
+        response.read_body do |chunk|
+          fd.write(chunk)
+          digest << chunk
+          if size > 0 && $stdout.tty?
+            count += chunk.bytesize
+            $stdout.write(sprintf("\r%0.2f%%", count/size * 100))
+          end
+        end
+      end
+      $stdout.write("\r      \r") if $stdout.tty?
+    end
+  end
+
+  File.rename(tmp, output)
+
+  return digest.hexdigest
+rescue SocketError => e
+  puts "Failure while downloading #{url}: #{e}"
+  raise
+ensure
+  File.unlink(tmp) if File.exist?(tmp)
+end # def download
+
+def untar(tarball, &block)
+  require "archive/tar/minitar"
+  tgz = Zlib::GzipReader.new(File.open(tarball))
+  # Pull out typesdb
+  tar = Archive::Tar::Minitar::Input.open(tgz)
+  tar.each do |entry|
+    path = block.call(entry)
+    next if path.nil?
+    parent = File.dirname(path)
+
+    mkdir_p parent unless File.directory?(parent)
+
+    # Skip this file if the output file is the same size
+    if entry.directory?
+      mkdir path unless File.directory?(path)
+    else
+      entry_mode = entry.instance_eval { @mode } & 0777
+      if File.exists?(path)
+        stat = File.stat(path)
+        # TODO(sissel): Submit a patch to archive-tar-minitar upstream to
+        # expose headers in the entry.
+        entry_size = entry.instance_eval { @size }
+        # If file sizes are same, skip writing.
+        next if stat.size == entry_size && (stat.mode & 0777) == entry_mode
+      end
+      puts "Extracting #{entry.full_name} from #{tarball} #{entry_mode.to_s(8)}"
+      File.open(path, "w") do |fd|
+        # eof? check lets us skip empty files. Necessary because the API provided by
+        # Archive::Tar::Minitar::Reader::EntryStream only mostly acts like an
+        # IO object. Something about empty files in this EntryStream causes
+        # IO.copy_stream to throw "can't convert nil into String" on JRuby
+        # TODO(sissel): File a bug about this.
+        while !entry.eof?
+          chunk = entry.read(16384)
+          fd.write(chunk)
+        end
+          #IO.copy_stream(entry, fd)
+      end
+      File.chmod(entry_mode, path)
+    end
+  end
+  tar.close
+  File.unlink(tarball) if File.file?(tarball)
+end # def untar
+
+def ungz(file)
+
+  outpath = file.gsub('.gz', '')
+  tgz = Zlib::GzipReader.new(File.open(file))
+  begin
+    File.open(outpath, "w") do |out|
+      IO::copy_stream(tgz, out)
+    end
+    File.unlink(file)
+  rescue
+    File.unlink(outpath) if File.file?(outpath)
+   raise
+  end
+  tgz.close
+end
+
+desc "Process any vendor files required for this plugin"
+task "vendor" do |task, args|
+
+  @files.each do |file| 
+    download = file_fetch(file['url'], file['sha1'])
+    if download =~ /.tar.gz/
+      prefix = download.gsub('.tar.gz', '').gsub('vendor/', '')
+      untar(download) do |entry|
+        if !file['files'].nil?
+          next unless file['files'].include?(entry.full_name.gsub(prefix, ''))
+          out = entry.full_name.split("/").last
+        end
+        File.join('vendor', out)
+      end
+    elsif download =~ /.gz/
+      ungz(download)
+    end
+  end
+
+end