Module: Daemontools

Defined in:
lib/daemontools.rb,
lib/daemontools/version.rb,
lib/daemontools/service_builder.rb,
lib/daemontools/service_remover.rb

Defined Under Namespace

Classes: Builder, Remover

Constant Summary collapse

VERSION = 
"0.2.2"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.log_root ⇒ Object

Returns the value of attribute log_root.



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# File 'lib/daemontools.rb', line 9

def log_root
  @log_root
end

.svc_root ⇒ Object

Returns the value of attribute svc_root.



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# File 'lib/daemontools.rb', line 9

def svc_root
  @svc_root
end

Class Method Details

.add(name, command, options = {}) ⇒ Object 



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# File 'lib/daemontools.rb', line 60

def self.add(name, command, options = {})
  @name = name
  @command = command
  @log_dir = options[:log_dir] || "#{@log_root}/#{@name}"
  @pre_command = options[:pre_command]
  @sleep = options[:sleep] || 3
  @path = "#{@svc_root}/#{name}"
  @change_user_command = options[:change_user_command]
  @ulimit = options[:ulimit]
  @write_time = options[:write_time]

  if Dir.exists?(@path)
    stop(name)
  else
    Dir.mkdir(@path)
  end
  File.open("#{@path}/down", 'w') {|f| f.write('')}
  Dir.mkdir("#{@path}/log") unless Dir.exists?("#{@path}/log")
  File.open("#{@path}/log/run", 'w', 0755) {|f| f.write(run_template('log.erb'))}
  File.open("#{@path}/run", 'w', 0755) {|f| f.write(run_template('run.erb'))}

  unless options[:not_wait]
    wait_timeout = options[:wait_timeout] || 10
    now = Time.now.to_f
    while `sudo svstat #{@path} 2>&1`.match(/unable to open/i)
      raise "Timeout wait for svc add service" if Time.now.to_f - now > wait_timeout
      sleep 0.1
    end
  end

  true
end

.add_empty(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 46

def self.add_empty(name)
  path = "#{@svc_root}/#{name}"
  Dir.mkdir(path) unless Dir.exists?(path)
  File.open("#{path}/down", 'w') {|f| f.write('')}
  now = Time.now.to_f
  while `sudo svstat #{path} 2>&1`.match(/unable to open/i)
    raise "Timeout wait for svc add service" if Time.now.to_f - now > 10
    sleep 0.1
  end
  File.delete("#{path}/down")
  stop(name)
  true
end

.check_service_exists(name, raise_error = true) ⇒ Object 



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# File 'lib/daemontools.rb', line 128

def self.check_service_exists(name, raise_error = true)
  @path = "#{@svc_root}/#{name}"
  if raise_error
    raise "Service #{name} not exists" unless Dir.exists?(@path)
  else
    Dir.exists?(@path)
  end
end

.delete(name, rm_cmd = nil) ⇒ Object 



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# File 'lib/daemontools.rb', line 93

def self.delete(name, rm_cmd = nil)
  check_service_exists(name)
  stop(name)
  cmd = rm_cmd.nil? ? "rm -rf #{@path} 2>&1" : "#{rm_cmd} #{@path}"
  r = `#{cmd}`
  raise r if $?.exitstatus != 0
  true
end

.down?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daemontools.rb', line 30

def self.down?(name)
  status(name)[0] == "down"
end

.exists?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daemontools.rb', line 14

def self.exists?(name)
  check_service_exists(name, false)
end

.make_run_status_down(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 120

def self.make_run_status_down(name)
  check_service_exists(name)
  File.open("#{@path}/down", 'w') {|f| f.write('')}
  true
end

.make_run_status_up(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 115

def self.make_run_status_up(name)
  File.delete("#{@path}/down")
  true
end

.restart(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 42

def self.restart(name)
  run_svc(name, 't')
end

.run_status(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 102

def self.run_status(name)
  check_service_exists(name)
  File.exists?("#{@path}/down") ? "down" : "up"
end

.run_status_down?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daemontools.rb', line 111

def self.run_status_down?(name)
  run_status(name) == "down"
end

.run_status_up?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daemontools.rb', line 107

def self.run_status_up?(name)
  run_status(name) == "up"
end

.run_svc(name, command) ⇒ Object 



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# File 'lib/daemontools.rb', line 137

def self.run_svc(name, command)
  check_service_exists(name)
  r = `sudo svc -#{command} #{@path} 2>&1`
  raise r if $?.exitstatus != 0
  raise r if ! r.empty?
  true
end

.run_template(template_name) ⇒ Object 



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# File 'lib/daemontools.rb', line 145

def self.run_template(template_name)
  @user = Etc.getpwuid(Process.uid).name
  template_path = File.expand_path(File.dirname(__FILE__))+'/../templates/'+template_name
  ERB.new(File.read(template_path)).result(binding())
end

.start(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 38

def self.start(name)
  run_svc(name, 'u')
end

.status(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 18

def self.status(name)
  check_service_exists(name)
  r = `sudo svstat #{@path} 2>&1`
  raise r if $?.exitstatus != 0
  raise "Unknown status" unless r.match(/.*?:\s*(\S+).*\s(\d+) seconds.*/)
  [$1, $2.to_i]
end

.stop(name) ⇒ Object 



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# File 'lib/daemontools.rb', line 34

def self.stop(name)
  run_svc(name, 'd')
end

.up?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daemontools.rb', line 26

def self.up?(name)
  status(name)[0] == "up"
end