Class: PhusionPassenger::AdminTools::ServerInstance

Inherits:
Object
  • Object
show all
Defined in:
lib/phusion_passenger/admin_tools/server_instance.rb

Defined Under Namespace

Classes: CorruptedDirectoryError, GenerationsAbsentError, Group, Process, RoleDeniedError, StaleDirectoryError, Stats, UnsupportedGenerationStructureVersionError

Constant Summary collapse

DIR_STRUCTURE_MAJOR_VERSION =

If you change the structure version then don’t forget to change ext/common/ServerInstanceDir.h too.

1
DIR_STRUCTURE_MINOR_VERSION = 
0
GENERATION_STRUCTURE_MAJOR_VERSION = 
1
GENERATION_STRUCTURE_MINOR_VERSION = 
0
STALE_TIME_THRESHOLD = 
60

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ ServerInstance

Returns a new instance of ServerInstance.

Raises:

  • (ArgumentError) 


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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 140

def initialize(path)
	raise ArgumentError, "Path may not be nil." if path.nil?
	@path = path
	
	if File.exist?("#{path}/control_process.pid")
		data = File.read("#{path}/control_process.pid").strip
		@pid = data.to_i
	else
		path =~ /passenger\.\d+\.\d+\.(\d+)\Z/
		@pid = $1.to_i
	end
	
	generations = Dir["#{path}/generation-*"]
	if generations.empty?
		raise GenerationsAbsentError, "There are no generation subdirectories in this instance directory."
	end
	highest_generation_number = 0
	generations.each do |generation|
		File.basename(generation) =~ /(\d+)/
		generation_number = $1.to_i
		if generation_number > highest_generation_number
			highest_generation_number = generation_number
		end
	end
	@generation_path = "#{path}/generation-#{highest_generation_number}"
	
	if !File.exist?("#{@generation_path}/structure_version.txt")
		raise CorruptedDirectoryError, "The generation directory doesn't contain a structure version specification file."
	end
	version_data = File.read("#{@generation_path}/structure_version.txt").strip
	major, minor = version_data.split(".", 2)
	if major.nil? || minor.nil? || major !~ /\A\d+\Z/ || minor !~ /\A\d+\Z/
		raise CorruptedDirectoryError, "The generation directory doesn't contain a valid structure version specification file."
	end
	major = major.to_i
	minor = minor.to_i
	if major != GENERATION_STRUCTURE_MAJOR_VERSION || minor > GENERATION_STRUCTURE_MINOR_VERSION
		raise UnsupportedGenerationStructureVersionError, "Unsupported generation directory structure version."
	end
	
	if @pid == 0
		raise CorruptedDirectoryError, "Instance directory contains corrupted control_process.pid file."
	elsif !AdminTools.process_is_alive?(@pid)
		raise StaleDirectoryError, "There is no instance with PID #{@pid}."
	end
end

Instance Attribute Details

#generation_path ⇒ Object (readonly)

Returns the value of attribute generation_path.



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 106

def generation_path
  @generation_path
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 105

def path
  @path
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 107

def pid
  @pid
end

Class Method Details

.for_pid(pid, options = {}) ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 136

def self.for_pid(pid, options = {})
	return list(options).find { |c| c.pid == pid }
end

.list(options = {}) ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 109

def self.list(options = {})
	options = {
		:clean_stale_or_corrupted => true
	}.merge(options)
	instances = []
	
	Dir["#{AdminTools.tmpdir}/passenger.*"].each do |dir|
		next if File.basename(dir) !~ /passenger\.#{DIR_STRUCTURE_MAJOR_VERSION}\.(\d+)\.(\d+)\Z/
		minor = $1
		next if minor.to_i > DIR_STRUCTURE_MINOR_VERSION
		
		begin
			instances << ServerInstance.new(dir)
		rescue StaleDirectoryError, CorruptedDirectoryError
			if options[:clean_stale_or_corrupted] &&
			   File.stat(dir).mtime < current_time - STALE_TIME_THRESHOLD
				log_cleaning_action(dir)
				FileUtils.chmod_R(0700, dir) rescue nil
				FileUtils.rm_rf(dir)
			end
		rescue UnsupportedGenerationStructureVersionError, GenerationsAbsentError
			# Do nothing.
		end
	end
	return instances
end

Instance Method Details

#analytics_log_dir ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 239

def analytics_log_dir
	return File.read("#{@generation_path}/analytics_log_dir.txt")
rescue Errno::ENOENT
	return nil
end

#backtraces ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 249

def backtraces
	return @client.backtraces
end

#connect(role_or_username, password = nil) ⇒ Object

Raises:

  • ArgumentError: Unsupported role

  • RoleDeniedError: The user that the current process is as is not authorized to utilize the given role.

  • EOFError: The server unexpectedly closed the connection during authentication.

  • SecurityError: The server denied our authentication credentials.



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 192

def connect(role_or_username, password = nil)
	if role_or_username.is_a?(Symbol)
		case role_or_username
		when :passenger_status
			username = "_passenger-status"
			begin
				filename = "#{@generation_path}/passenger-status-password.txt"
				password = File.open(filename, "rb") do |f|
					f.read
				end
			rescue Errno::EACCES
				raise RoleDeniedError
			end
		else
			raise ArgumentError, "Unsupported role #{role_or_username}"
		end
	else
		username = role_or_username
	end
	
	@client = MessageClient.new(username, password, "unix:#{@generation_path}/socket")
	begin
		yield self
	ensure
		@client.close
	end
end

#global_queue_size ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 267

def global_queue_size
	return stats.global_queue_size
end

#groups ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 271

def groups
	doc = REXML::Document.new(xml)
	
	groups = []
	doc.elements.each("info/groups/group") do |group_xml|
		group = Group.new(group_xml.elements["app_root"].text,
			group_xml.elements["name"].text,
			group_xml.elements["environment"].text)
		group_xml.elements.each("processes/process") do |process_xml|
			process = Process.new(group)
			process_xml.elements.each do |element|
				if element.name == "server_sockets"
					element.elements.each("server_socket") do |server_socket|
						name = server_socket.elements["name"].text.to_sym
						address = server_socket.elements["address"].text
						address_type = server_socket.elements["type"].text
						process.server_sockets[name] = OpenStruct.new(
							:address => address,
							:address_type => address_type
						)
					end
				else
					if process.respond_to?("#{element.name}=")
						if Process::INT_PROPERTIES.include?(element.name.to_sym)
							value = element.text.to_i
						elsif Process::BOOL_PROPERTIES.include?(element.name.to_sym)
							value = element.text == "true"
						else
							value = element.text
						end
						process.send("#{element.name}=", value)
					end
				end
			end
			group.processes << process
		end
		groups << group
	end
	return groups
end

#helper_server_pid ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 235

def helper_server_pid
	return File.read("#{@generation_path}/helper_server.pid").strip.to_i
end

#processes ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 312

def processes
	return groups.map do |group|
		group.processes
	end.flatten
end

#stats ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 257

def stats
	doc = REXML::Document.new(xml)
	stats = Stats.new
	stats.max = doc.elements["info/max"].text.to_i
	stats.count = doc.elements["info/count"].text.to_i
	stats.active = doc.elements["info/active"].text.to_i
	stats.global_queue_size = doc.elements["info/global_queue_size"].text.to_i
	return stats
end

#status ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 245

def status
	return @client.status
end

#web_server_config_files ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 224

def web_server_config_files
	config_files = File.read("#{@generation_path}/config_files.txt").split("\n")
	config_files.map! do |filename|
		filename.strip
	end
	config_files.reject do |filename|
		filename.empty?
	end
	return config_files
end

#web_server_description ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 220

def web_server_description
	return File.read("#{@generation_path}/web_server.txt")
end

#xml ⇒ Object 



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# File 'lib/phusion_passenger/admin_tools/server_instance.rb', line 253

def xml
	return @client.xml
end