Class: LogStash::Runner

Inherits:
Clamp::StrictCommand show all
Includes:
Util::Loggable
Defined in:
lib/logstash/runner.rb

Constant Summary collapse

DEFAULT_BOOTSTRAP_CHECKS =

Ordered list of check to run before starting logstash theses checks can be changed by a plugin loaded into memory.

[
    LogStash::BootstrapCheck::DefaultConfig,
    LogStash::BootstrapCheck::PersistedQueueConfig
]
SYSTEM_SETTINGS =

We configure the registry and load any plugin that can register hooks with logstash, this needs to be done before any operation.

LogStash::SETTINGS.clone

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Clamp::StrictCommand

#handle_remaining_arguments

Methods included from Clamp::Option::StrictDeclaration

#define_appender_for, #define_deprecated_accessors_for, #define_deprecated_writer_for, #define_reader_for, #define_simple_writer_for

Constructor Details

#initialize(*args) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/logstash/runner.rb', line 227

def initialize(*args)
  @settings = LogStash::SETTINGS
  @bootstrap_checks = DEFAULT_BOOTSTRAP_CHECKS.dup

  # Default we check local sources: `-e`, `-f` and the logstash.yml options.
  @source_loader = LogStash::Config::SourceLoader.new(@settings)
  @source_loader.add_source(LogStash::Config::Source::Local.new(@settings))
  @source_loader.add_source(LogStash::Config::Source::Modules.new(@settings))
  @source_loader.add_source(LogStash::Config::Source::MultiLocal.new(@settings))

  super(*args)
end

Instance Attribute Details

#agent ⇒ Object (readonly)

Returns the value of attribute agent.



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# File 'lib/logstash/runner.rb', line 224

def agent
  @agent
end

#bootstrap_checks ⇒ Object

Returns the value of attribute bootstrap_checks.



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# File 'lib/logstash/runner.rb', line 225

def bootstrap_checks
  @bootstrap_checks
end

#settings ⇒ Object (readonly)

Returns the value of attribute settings.



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# File 'lib/logstash/runner.rb', line 224

def settings
  @settings
end

#source_loader ⇒ Object (readonly)

Returns the value of attribute source_loader.



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# File 'lib/logstash/runner.rb', line 224

def source_loader
  @source_loader
end

Instance Method Details

#configure_plugin_paths(paths) ⇒ Object

add the given paths for ungemified/bare plugins lookups

Parameters:

  • paths (String, Array<String>) —

    plugins path string or list of path strings to add



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# File 'lib/logstash/runner.rb', line 440

def configure_plugin_paths(paths)
  Array(paths).each do |path|
    fail(I18n.t("logstash.runner.configuration.plugin_path_missing", :path => path)) unless File.directory?(path)
    LogStash::Environment.add_plugin_path(path)
  end
end

#create_agent(*args) ⇒ Object 



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# File 'lib/logstash/runner.rb', line 447

def create_agent(*args)
  LogStash::Agent.new(*args)
end

#execute ⇒ Object 



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# File 'lib/logstash/runner.rb', line 245

def execute
  LogStash::Util::SettingsHelper.post_process

  require "logstash/util"
  require "logstash/util/java_version"
  require "stud/task"

  # Configure Logstash logging facility, this need to be done before everything else to
  # make sure the logger has the correct settings and the log level is correctly defined.
  java.lang.System.setProperty("ls.logs", setting("path.logs"))
  java.lang.System.setProperty("ls.log.format", setting("log.format"))
  java.lang.System.setProperty("ls.log.level", setting("log.level"))
  unless java.lang.System.getProperty("log4j.configurationFile")
    log4j_config_location = ::File.join(setting("path.settings"), "log4j2.properties")

    # Windows safe way to produce a file: URI.
    file_schema = "file://" + (LogStash::Environment.windows? ? "/" : "")
    LogStash::Logging::Logger::reconfigure(URI.encode(file_schema + File.absolute_path(log4j_config_location)))
  end
  # override log level that may have been introduced from a custom log4j config file
  LogStash::Logging::Logger::configure_logging(setting("log.level"))

  if setting("config.debug") && !logger.debug?
    logger.warn("--config.debug was specified, but log.level was not set to \'debug\'! No config info will be logged.")
  end

  # Skip any validation and just return the version
  if version?
    show_version
    return 0
  end

  # Add local modules to the registry before everything else
  LogStash::Modules::Util.register_local_modules(LogStash::Environment::LOGSTASH_HOME)

  @dispatcher = LogStash::EventDispatcher.new(self)
  LogStash::PLUGIN_REGISTRY.hooks.register_emitter(self.class, @dispatcher)

  @settings.validate_all
  @dispatcher.fire(:before_bootstrap_checks)

  return start_shell(setting("interactive"), binding) if setting("interactive")

  module_parser = LogStash::Modules::CLIParser.new(setting("modules_list"), setting("modules_variable_list"))
  # Now populate Setting for modules.list with our parsed array.
  @settings.set("modules.cli", module_parser.output)

  begin
    @bootstrap_checks.each { |bootstrap| bootstrap.check(@settings) }
  rescue LogStash::BootstrapCheckError => e
    signal_usage_error(e.message)
    return 1
  end
  @dispatcher.fire(:after_bootstrap_checks)

  LogStash::Util::set_thread_name(self.class.name)

  LogStash::ShutdownWatcher.unsafe_shutdown = setting("pipeline.unsafe_shutdown")

  configure_plugin_paths(setting("path.plugins"))


  @settings.format_settings.each {|line| logger.debug(line) }

  # Check for absence of any configuration
  # not bulletproof because we don't know yet if there
  # are no pipelines from pipelines.yml
  sources_without_conflict = []
  unmatched_sources_conflict_messages = []
  @source_loader.sources do |source|
    if source.config_conflict?
      if source.conflict_messages.any?
        unmatched_sources_conflict_messages << source.conflict_messages.join(", ")
      end
    else
      sources_without_conflict << source
    end
  end
  if unmatched_sources_conflict_messages.any?
    # i18n should be done at the sources side
    signal_usage_error(unmatched_sources_conflict_messages.join(" "))
    return 1
  elsif sources_without_conflict.empty?
    signal_usage_error(I18n.t("logstash.runner.missing-configuration"))
    return 1
  end

  if setting("config.test_and_exit")
    begin
      results = @source_loader.fetch

      # TODO(ph): make it better for multiple pipeline
      if results.success?
        results.response.each do |pipeline_config|
          LogStash::BasePipeline.new(pipeline_config)
        end
        puts "Configuration OK"
        logger.info "Using config.test_and_exit mode. Config Validation Result: OK. Exiting Logstash"
      else
        raise "Could not load the configuration file"
      end
      return 0
    rescue => e
      logger.fatal I18n.t("logstash.runner.invalid-configuration", :error => e.message)
      return 1
    end
  end

  # lock path.data before starting the agent
  @data_path_lock = FileLockFactory.obtainLock(java.nio.file.Paths.get(setting("path.data")).to_absolute_path, ".lock")

  logger.info("Starting Logstash", "logstash.version" => LOGSTASH_VERSION)

  @dispatcher.fire(:before_agent)
  @agent = create_agent(@settings, @source_loader)
  @dispatcher.fire(:after_agent)

  # enable sigint/sigterm before starting the agent
  # to properly handle a stalled agent
  sigint_id = trap_sigint()
  sigterm_id = trap_sigterm()

  @agent_task = Stud::Task.new { @agent.execute }

  # no point in enabling config reloading before the agent starts
  # also windows doesn't have SIGHUP. we can skip it
  sighup_id = LogStash::Environment.windows? ? nil : trap_sighup()

  agent_return = @agent_task.wait

  @agent.shutdown

  logger.info("Logstash shut down.")

  # flush any outstanding log messages during shutdown
  org.apache.logging.log4j.LogManager.shutdown

  agent_return

rescue org.logstash.LockException => e
  logger.fatal(I18n.t("logstash.runner.locked-data-path", :path => setting("path.data")))
  return 1
rescue Clamp::UsageError => e
  $stderr.puts "ERROR: #{e.message}"
  show_short_help
  return 1
rescue => e
  # if logger itself is not initialized
  if LogStash::Logging::Logger.get_logging_context.nil?
    $stderr.puts "#{I18n.t("oops")} :error => #{e}, :backtrace => #{e.backtrace}"
  else
    logger.fatal(I18n.t("oops"), :error => e, :backtrace => e.backtrace)
  end
  return 1
ensure
  Stud::untrap("INT", sigint_id) unless sigint_id.nil?
  Stud::untrap("TERM", sigterm_id) unless sigterm_id.nil?
  Stud::untrap("HUP", sighup_id) unless sighup_id.nil?
  FileLockFactory.releaseLock(@data_path_lock) if @data_path_lock
  @log_fd.close if @log_fd
end

#fail(message) ⇒ Object

Emit a failure message and abort.



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# File 'lib/logstash/runner.rb', line 452

def fail(message)
  signal_usage_error(message)
end

#run(args) ⇒ Object 



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# File 'lib/logstash/runner.rb', line 240

def run(args)
  return 1 unless LogStash::Util::SettingsHelper.from_yaml(args)
  super(*[args])
end

#setting(key) ⇒ Object 



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# File 'lib/logstash/runner.rb', line 507

def setting(key)
  @settings.get_value(key)
end

#show_gems ⇒ Object

def show_version_java



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# File 'lib/logstash/runner.rb', line 431

def show_gems
  require "rubygems"
  Gem::Specification.each do |spec|
    puts "gem #{spec.name} #{spec.version}"
  end
end

#show_short_help ⇒ Object

def fail



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# File 'lib/logstash/runner.rb', line 456

def show_short_help
  puts I18n.t("logstash.runner.short-help")
end

#show_version ⇒ Object

def self.main



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# File 'lib/logstash/runner.rb', line 407

def show_version
  show_version_logstash

  if logger.info?
    show_version_ruby
    show_version_java
    show_gems if logger.debug?
  end
end

#show_version_java ⇒ Object

def show_version_ruby



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# File 'lib/logstash/runner.rb', line 425

def show_version_java
  properties = java.lang.System.getProperties
  puts "java #{properties["java.version"]} (#{properties["java.vendor"]})"
  puts "jvm #{properties["java.vm.name"]} / #{properties["java.vm.version"]}"
end

#show_version_logstash ⇒ Object

def show_version



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# File 'lib/logstash/runner.rb', line 417

def show_version_logstash
  puts "logstash #{LOGSTASH_VERSION}"
end

#show_version_ruby ⇒ Object

def show_version_logstash



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# File 'lib/logstash/runner.rb', line 421

def show_version_ruby
  puts RUBY_DESCRIPTION
end

#start_shell(shell, start_binding) ⇒ Object 



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# File 'lib/logstash/runner.rb', line 460

def start_shell(shell, start_binding)
  case shell
  when "pry"
    require 'pry'
    start_binding.pry
  when "irb"
    require 'irb'
    ARGV.clear
    # TODO: set binding to this instance of Runner
    # currently bugged as per https://github.com/jruby/jruby/issues/384
    IRB.start(__FILE__)
  else
    fail(I18n.t("logstash.runner.invalid-shell"))
  end
end

#trap_sighup ⇒ Object 



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# File 'lib/logstash/runner.rb', line 476

def trap_sighup
  Stud::trap("HUP") do
    logger.warn(I18n.t("logstash.agent.sighup"))
    @agent.converge_state_and_update
  end
end

#trap_sigint ⇒ Object 



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# File 'lib/logstash/runner.rb', line 490

def trap_sigint
  Stud::trap("INT") do
    if @interrupted_once
      logger.fatal(I18n.t("logstash.agent.forced_sigint"))
      # calling just Kernel.exit only raises SystemExit exception
      # and doesn't guarantee the process will terminate
      # We must call Kernel.exit! so java.lang.System.exit is called
      exit!(1)
    else
      logger.warn(I18n.t("logstash.agent.sigint"))
      Thread.new(logger) {|lg| sleep 5; lg.warn(I18n.t("logstash.agent.slow_shutdown")) }
      @interrupted_once = true
      @agent_task.stop!
    end
  end
end

#trap_sigterm ⇒ Object 



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# File 'lib/logstash/runner.rb', line 483

def trap_sigterm
  Stud::trap("TERM") do
    logger.warn(I18n.t("logstash.agent.sigterm"))
    @agent_task.stop!
  end
end