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tag: release-2.2.15
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executable file 129 lines (116 sloc) 3.72 kb
#!/usr/bin/env ruby
# Phusion Passenger - http://www.modrails.com/
# Copyright (c) 2008, 2009 Phusion
#
# "Phusion Passenger" is a trademark of Hongli Lai & Ninh Bui.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
##############################################################################
# A script for finding owner pipe leaks in Apache. An owner pipe is considered
# to be leaked if it is owned by two or more Apache processes.
#
# This script only works on Linux. Only run it when Apache is idle.
$LOAD_PATH << "#{File.dirname(__FILE__)}/../lib"
require 'set'
require 'passenger/platform_info'
include PlatformInfo
def list_pids
Dir.chdir("/proc") do
return Dir["*"].select do |x|
x =~ /^\d+$/
end
end
end
def list_pipes(pid)
pipes = []
Dir["/proc/#{pid}/fd/*"].each do |file|
if File.symlink?(file) && File.readlink(file) =~ /^pipe:\[(.*)\]$/
pipes << $1
end
end
return pipes
end
def is_rails_app(pid)
return File.read("/proc/#{pid}/cmdline") =~ /^Rails: /
end
def is_apache(pid)
begin
return File.readlink("/proc/#{pid}/exe") == HTTPD
rescue
return false
end
end
# Returns a pair of these items:
# - The owner pipe map. Maps a Rails application's PID to to its owner pipe's ID.
# - The reverse map. Maps an owner pipe ID to the Rail application's PID.
def create_owner_pipe_map
map = {}
reverse_map = {}
list_pids.select{ |x| is_rails_app(x) }.each do |pid|
owner_pipe = list_pipes(pid).first
map[pid] = owner_pipe
reverse_map[owner_pipe] = pid
end
return [map, reverse_map]
end
def show_owner_pipe_listing(map, reverse_map)
puts "------------ Owner pipe listing ------------"
count = 0
list_pids.select{ |x| is_apache(x) }.sort.each do |pid|
list_pipes(pid).select do |pipe|
reverse_map.has_key?(pipe)
end.each do |pipe|
puts "Apache PID #{pid} holds the owner pipe (#{pipe}) " <<
"for Rails PID #{reverse_map[pipe]}"
count += 1
end
end
if count == 0
puts "(none)"
end
puts ""
end
def show_owner_pipe_leaks(map, reverse_map)
apache_owner_pipe_map = {}
list_pids.select{ |x| is_apache(x) }.sort.each do |pid|
list_pipes(pid).select do |pipe|
reverse_map.has_key?(pipe)
end.each do |pipe|
apache_owner_pipe_map[pipe] ||= []
apache_owner_pipe_map[pipe] << pid
end
end
puts "------------ Leaks ------------"
count = 0
apache_owner_pipe_map.each_pair do |pipe, pids|
if pids.size >= 2
puts "Rails PID #{reverse_map[pipe]} owned by Apache processes: #{pids.join(", ")}"
count += 1
end
end
if count == 0
puts "(none)"
end
end
def start
map, reverse_map = create_owner_pipe_map
show_owner_pipe_listing(map, reverse_map)
show_owner_pipe_leaks(map, reverse_map)
end
start
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