atmo_boot

##
## All files that are a part of this project, unless explicitly noted otherwise,
## are covered by the following license:
##
## Copyright (c) 2011, The Arizona Board of Regents on behalf of The University 
## of Arizona
##
## All rights reserved.
##
## Developed by: iPlant Collaborative as a collaboration between participants at
## BIO5 at The University of Arizona (the primary hosting institution), Cold Spr
## ing Harbor Laboratory, The University of Texas at Austin, and individual cont
## ributors. Find out more at http://www.iplantcollaborative.org/.
##
## Redistribution and use in source and binary forms, with or without modificati
## on, are permitted provided that the following conditions are met:
##
## * Redistributions of source code must retain the above copyright notice, this
##   list of conditions and the following disclaimer.
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##   his list of conditions and the following disclaimer in the documentation an
##   d/or other materials provided with the distribution.
## * Neither the name of the iPlant Collaborative, BIO5, The University of Arizo
##   na, Cold Spring Harbor Laboratory, The University of Texas at Austin, nor t
##   he names of other contributors may be used to endorse or promote products d
##   erived from this software without specific prior written permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" A
## ND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPL
## IED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DI
## SCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FO
## R ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMA
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## ES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED A
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## SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
##

##
## Author: Seung-jin Kim <twitter: @seungjin>
##

require 'logger'
require 'net/http'
require 'open3'

def download_something(target,min_len)
  $log.debug "Downloading #{target}"
  url = URI.parse(target)
  req = Net::HTTP::Get.new(url.path)
  res = Net::HTTP.start(url.host, url.port) {|http| http.request(req) }
  if res.code != "200"
    $log.debug "request #{target} couldn't get 200 code"
    $log.debug "url<#{url}>, responsed code: #{res.code}"
    $log.debug "sleep for #{$default_delay_sec} seconds and will try again"
    sleep $default_delay_sec
    download_something(target,min_len)
  else
    $log.debug "request #{target} got size of #{res.body.length}"
    if min_len != 0
      if res.body.length <= min_len
        $log.debug "url<#{url}>, responsed code: #{res.code}, length: #{res.body.length}"
        $log.debug "sleep for #{$default_delay_sec} seconds and will try again"
        sleep $default_delay_sec
        download_something(target,min_len)
      else 
        $log.debug "Successfully downloaded #{target} and its size is #{res.body.length}"
        return res.body
      end
    else
      return res.body
    end
  end
end

# init 

$default_delay_sec = 10
#future plan: if keep fail for certain time(10min?), send email/notification to atmo cloud operators

if not File.exists?("/var/log/atmo") && File.directory?("/var/log/atmo") :
  begin
    Dir.mkdir("/var/log/atmo")
  rescue StandardError => exp
    puts "atmo_boot error: #{exp}"
    puts "atmo_boot stops!!"
    exit()
  end
end
$log = Logger.new('/var/log/atmo/atmo_boot.log')

$log.info "Atmosphere Project"
$log.info "iPlant Collaborative"
$log.info "============================"
$log.info "atmo_boot init() starts"

#download key
$log.debug "start key download"
root_key = download_something('http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key',0)

#download atmoinit script
$log.debug "start atmoinit download"
atmo_init_script = download_something('http://169.254.169.254/latest/user-data',10)

#write root key
$log.debug "write root key"
File.open("/root/.ssh/authorized_keys","w") { |f|
  f.write(root_key)
  $log.debug "root key was written at /root/.ssh/authorized_key"
}

#write atmoinit script (to /usr/sbin/atmoinit)
$log.debug "write atmoinit script"
File.open("/usr/sbin/atmo_init","w") { |f| 
  f.write(atmo_init_script) 
  $log.debug "atmoinit was written at /usr/sbin/atmo_init"
  $log.debug "written atmoinit size is #{atmo_init_script.length}"
}

# run atmoinit script
$log.debug "try to run atmoinit script"
stdin, stdout, stderr, wait_thr = Open3.popen3("/usr/bin/ruby","/usr/sbin/atmo_init")
  #puts "a" + stdin.gets.to_s
  $log.debug "run atmoinit's stdout: #{stdout.gets.to_s}"
  $log.debug "run atmoinit's stderr: #{stderr.gets.to_s}"
stdin.close
stdout.close
stderr.close


$log.info "End of atmo_boot process, bye bye.."