95 lines
3.5 KiB
Ruby
95 lines
3.5 KiB
Ruby
require 'optparse'
|
|
require 'socket'
|
|
|
|
def daemonize #:nodoc:
|
|
exit if fork # Parent exits, child continues.
|
|
Process.setsid # Become session leader.
|
|
exit if fork # Zap session leader. See [1].
|
|
Dir.chdir "/" # Release old working directory.
|
|
File.umask 0000 # Ensure sensible umask. Adjust as needed.
|
|
STDIN.reopen "/dev/null" # Free file descriptors and
|
|
STDOUT.reopen "/dev/null", "a" # point them somewhere sensible.
|
|
STDERR.reopen STDOUT # STDOUT/ERR should better go to a logfile.
|
|
end
|
|
|
|
def spawn(port)
|
|
print "Checking if something is already running on port #{port}..."
|
|
begin
|
|
srv = TCPServer.new('0.0.0.0', port)
|
|
srv.close
|
|
srv = nil
|
|
print "NO\n "
|
|
print "Starting FCGI on port: #{port}\n "
|
|
system("#{OPTIONS[:spawner]} -f #{OPTIONS[:dispatcher]} -p #{port}")
|
|
rescue
|
|
print "YES\n"
|
|
end
|
|
end
|
|
|
|
def spawn_all
|
|
OPTIONS[:instances].times { |i| spawn(OPTIONS[:port] + i) }
|
|
end
|
|
|
|
OPTIONS = {
|
|
:environment => "production",
|
|
:spawner => '/usr/bin/env spawn-fcgi',
|
|
:dispatcher => File.expand_path(RAILS_ROOT + '/public/dispatch.fcgi'),
|
|
:port => 8000,
|
|
:instances => 3,
|
|
:repeat => nil
|
|
}
|
|
|
|
ARGV.options do |opts|
|
|
opts.banner = "Usage: spawner [options]"
|
|
|
|
opts.separator ""
|
|
|
|
opts.on <<-EOF
|
|
Description:
|
|
The spawner is a wrapper for spawn-fcgi that makes it easier to start multiple FCGI
|
|
processes running the Rails dispatcher. The spawn-fcgi command is included with the lighttpd
|
|
web server, but can be used with both Apache and lighttpd (and any other web server supporting
|
|
externally managed FCGI processes).
|
|
|
|
You decide a starting port (default is 8000) and the number of FCGI process instances you'd
|
|
like to run. So if you pick 9100 and 3 instances, you'll start processes on 9100, 9101, and 9102.
|
|
|
|
By setting the repeat option, you get a protection loop, which will attempt to restart any FCGI processes
|
|
that might have been exited or outright crashed.
|
|
|
|
Examples:
|
|
spawner # starts instances on 8000, 8001, and 8002
|
|
spawner -p 9100 -i 10 # starts 10 instances counting from 9100 to 9109
|
|
spawner -p 9100 -r 5 # starts 3 instances counting from 9100 to 9102 and attempts start them every 5 seconds
|
|
EOF
|
|
|
|
opts.on(" Options:")
|
|
|
|
opts.on("-p", "--port=number", Integer, "Starting port number (default: #{OPTIONS[:port]})") { |v| OPTIONS[:port] = v }
|
|
opts.on("-i", "--instances=number", Integer, "Number of instances (default: #{OPTIONS[:instances]})") { |v| OPTIONS[:instances] = v }
|
|
opts.on("-r", "--repeat=seconds", Integer, "Repeat spawn attempts every n seconds (default: off)") { |v| OPTIONS[:repeat] = v }
|
|
opts.on("-e", "--environment=name", String, "test|development|production (default: #{OPTIONS[:environment]})") { |v| OPTIONS[:environment] = v }
|
|
opts.on("-s", "--spawner=path", String, "default: #{OPTIONS[:spawner]}") { |v| OPTIONS[:spawner] = v }
|
|
opts.on("-d", "--dispatcher=path", String, "default: #{OPTIONS[:dispatcher]}") { |dispatcher| OPTIONS[:dispatcher] = File.expand_path(dispatcher) }
|
|
|
|
opts.separator ""
|
|
|
|
opts.on("-h", "--help", "Show this help message.") { puts opts; exit }
|
|
|
|
opts.parse!
|
|
end
|
|
|
|
ENV["RAILS_ENV"] = OPTIONS[:environment]
|
|
|
|
if OPTIONS[:repeat]
|
|
daemonize
|
|
trap("TERM") { exit }
|
|
|
|
loop do
|
|
spawn_all
|
|
sleep(OPTIONS[:repeat])
|
|
end
|
|
else
|
|
spawn_all
|
|
end
|