test/test_mogtool_bigfile.rb

   1 # -*- encoding: binary -*-
   2 require "./test/fresh"
   3 require "net/http"
   4 ok = true
   5 unless File.executable?(`which mogtool 2>/dev/null`.strip)
   6   warn "mogtool not found, skipping #{__FILE__}"
   7   ok = false
   8 end
   9
  10 class TestMogtoolBigfile < Test::Unit::TestCase
  11   include TestFreshSetup
  12   buf = File.open("/dev/urandom") { |fp| fp.read(1024) }
  13   buf *= 1024
  14   RAND = Tempfile.new("rand")
  15   RAND.sync = true
  16   sha1 = Digest::SHA1.new
  17   100.times { sha1 << buf; RAND.write(buf) }
  18   buf = nil
  19   RAND_SHA1 = sha1.hexdigest
  20
  21   def setup
  22     setup_mogilefs
  23     add_host_device_domain
  24     RAND.rewind
  25     @big_uuid = "big-#{uuid}"
  26     @client = MogileFS::MogileFS.new(:hosts => @trackers, :domain => @domain)
  27   end
  28
  29   def mogtool!(*args)
  30     x!("mogtool", "--trackers=#{@trackers.join(',')}",
  31        "--domain=#@domain", *args)
  32   end
  33
  34   # the mogtool definition of gzip is wrong and just raw zlib deflate
  35   def test_bigfile_gzip_mogtool
  36     mogtool!("inject", "--gzip", "--bigfile", RAND.path, @big_uuid)
  37     sha1_check
  38   end
  39
  40   def test_bigfile_mogtool
  41     mogtool!("inject", "--bigfile", RAND.path, @big_uuid)
  42     sha1_check
  43
  44     # ensure fallback works for rebalanced/replaced files
  45     part1 = "#@big_uuid,1"
  46     tmp = tmpfile("part1")
  47     before_uris = @client.get_uris(part1)
  48     @client.get_file_data(part1, tmp)
  49     @client.delete(part1)
  50     @client.store_file(part1, nil, tmp.path)
  51     wait_for_DELETE(before_uris)
  52     sha1_check
  53
  54     # corrupt the existing data in part1
  55     @client.store_content(part1, nil, "HELLO")
  56     @client.get_uris(part1)
  57
  58     # corruption is detected on verify
  59     junk = tmpfile("junk")
  60     assert_raises(MogileFS::ChecksumMismatchError) do
  61       @client.bigfile_write("_big_info:#@big_uuid", junk, :verify => true)
  62     end
  63
  64     # corruption is NOT detected on verify
  65     junk = tmpfile("junk")
  66     @client.bigfile_write("_big_info:#@big_uuid", junk, :verify => false)
  67
  68     # restoring no-corrupted data succeeds!
  69     @client.store_file(part1, nil, tmp.path)
  70     sha1_check
  71
  72     # missing parts fail
  73     before_uris = @client.get_uris(part1)
  74     @client.delete(part1)
  75     junk = tmpfile("junk")
  76     assert_raises(MogileFS::Backend::UnknownKeyError) do
  77       @client.bigfile_write("_big_info:#@big_uuid", junk, :verify => true)
  78     end
  79   end
  80
  81   def wait_for_DELETE(uris)
  82     uris.each do |uri|
  83       tries = 0
  84       begin
  85         Net::HTTP.start(uri.host, uri.port) do |http|
  86           sleep(0.1) while Net::HTTPOK === http.head(uri.path)
  87         end
  88       rescue
  89         if (tries += 1) < 666
  90           sleep(0.1)
  91           retry
  92         end
  93         raise
  94       end
  95     end
  96   end
  97
  98   def sha1_check
  99     r, w = IO.pipe
 100     @to_close << r
 101     @to_close << w
 102     th = Thread.new do
 103       sha1 = Digest::SHA1.new
 104       buf = ""
 105       while r.read(16384, buf)
 106         sha1 << buf
 107       end
 108       sha1.hexdigest
 109     end
 110     res = @client.bigfile_write("_big_info:#@big_uuid", w, :verify => true)
 111     w.close
 112     read_sha1 = th.value
 113     assert_equal RAND_SHA1, read_sha1
 114     assert_equal RAND.size, res[0]
 115   end
 116 end if ok