Synnefo » snf-ganeti

#!/usr/bin/python

#

# Copyright (C) 2006, 2007, 2010 Google Inc.

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

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# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

# 02110-1301, USA.

"""Script for unittesting the bdev module"""

import os

import unittest

from ganeti import bdev

from ganeti import errors

from ganeti import constants

import testutils

class TestBaseDRBD(testutils.GanetiTestCase):

  def testGetVersion(self):

    data = [

      ["version: 8.0.12 (api:76/proto:86-91)"],

      ["version: 8.2.7 (api:88/proto:0-100)"],

      ["version: 8.3.7.49 (api:188/proto:13-191)"],

    ]

    result = [

      {

      "k_major": 8,

      "k_minor": 0,

      "k_point": 12,

      "api": 76,

      "proto": 86,

      "proto2": "91",

      },

      {

      "k_major": 8,

      "k_minor": 2,

      "k_point": 7,

      "api": 88,

      "proto": 0,

      "proto2": "100",

      },

      {

      "k_major": 8,

      "k_minor": 3,

      "k_point": 7,

      "api": 188,

      "proto": 13,

      "proto2": "191",

      }

    ]

    for d,r in zip(data, result):

      self.assertEqual(bdev.BaseDRBD._GetVersion(d), r)

class TestDRBD8Runner(testutils.GanetiTestCase):

  """Testing case for DRBD8"""

  @staticmethod

  def _has_disk(data, dname, mname):

    """Check local disk corectness"""

    retval = (

      "local_dev" in data and

      data["local_dev"] == dname and

      "meta_dev" in data and

      data["meta_dev"] == mname and

      "meta_index" in data and

      data["meta_index"] == 0

      )

    return retval

  @staticmethod

  def _has_net(data, local, remote):

    """Check network connection parameters"""

    retval = (

      "local_addr" in data and

      data["local_addr"] == local and

      "remote_addr" in data and

      data["remote_addr"] == remote

      )

    return retval

  def testParserCreation(self):

    """Test drbdsetup show parser creation"""

    bdev.DRBD8._GetShowParser()

  def testParser80(self):

    """Test drbdsetup show parser for disk and network version 8.0"""

    data = self._ReadTestData("bdev-drbd-8.0.txt")

    result = bdev.DRBD8._GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11000),

                                  ("192.0.2.2", 11000)),

                    "Wrong network info (8.0.x)")

  def testParser83(self):

    """Test drbdsetup show parser for disk and network version 8.3"""

    data = self._ReadTestData("bdev-drbd-8.3.txt")

    result = bdev.DRBD8._GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11000),

                                  ("192.0.2.2", 11000)),

                    "Wrong network info (8.0.x)")

  def testParserNetIP4(self):

    """Test drbdsetup show parser for IPv4 network"""

    data = self._ReadTestData("bdev-drbd-net-ip4.txt")

    result = bdev.DRBD8._GetDevInfo(data)

    self.failUnless(("local_dev" not in result and

                     "meta_dev" not in result and

                     "meta_index" not in result),

                    "Should not find local disk info")

    self.failUnless(self._has_net(result, ("192.0.2.1", 11002),

                                  ("192.0.2.2", 11002)),

                    "Wrong network info (IPv4)")

  def testParserNetIP6(self):

    """Test drbdsetup show parser for IPv6 network"""

    data = self._ReadTestData("bdev-drbd-net-ip6.txt")

    result = bdev.DRBD8._GetDevInfo(data)

    self.failUnless(("local_dev" not in result and

                     "meta_dev" not in result and

                     "meta_index" not in result),

                    "Should not find local disk info")

    self.failUnless(self._has_net(result, ("2001:db8:65::1", 11048),

                                  ("2001:db8:66::1", 11048)),

                    "Wrong network info (IPv6)")

  def testParserDisk(self):

    """Test drbdsetup show parser for disk"""

    data = self._ReadTestData("bdev-drbd-disk.txt")

    result = bdev.DRBD8._GetDevInfo(data)

    self.failUnless(self._has_disk(result, "/dev/xenvg/test.data",

                                   "/dev/xenvg/test.meta"),

                    "Wrong local disk info")

    self.failUnless(("local_addr" not in result and

                     "remote_addr" not in result),

                    "Should not find network info")

  def testBarriersOptions(self):

    """Test class method that generates drbdsetup options for disk barriers"""

    # Tests that should fail because of wrong version/options combinations

    should_fail = [

      (8, 0, 12, "bfd", True),

      (8, 0, 12, "fd", False),

      (8, 0, 12, "b", True),

      (8, 2, 7, "bfd", True),

      (8, 2, 7, "b", True)

    ]

    for vmaj, vmin, vrel, opts, meta in should_fail:

      self.assertRaises(errors.BlockDeviceError,

                        bdev.DRBD8._ComputeDiskBarrierArgs,

                        vmaj, vmin, vrel, opts, meta)

    # get the valid options from the frozenset(frozenset()) in constants.

    valid_options = [list(x)[0] for x in constants.DRBD_VALID_BARRIER_OPT]

    # Versions that do not support anything

    for vmaj, vmin, vrel in ((8, 0, 0), (8, 0, 11), (8, 2, 6)):

      for opts in valid_options:

        self.assertRaises(errors.BlockDeviceError,

                          bdev.DRBD8._ComputeDiskBarrierArgs,

                          vmaj, vmin, vrel, opts, True)

    # Versions with partial support (testing only options that are supported)

    tests = [

      (8, 0, 12, "n", False, []),

      (8, 0, 12, "n", True, ["--no-md-flushes"]),

      (8, 2, 7, "n", False, []),

      (8, 2, 7, "fd", False, ["--no-disk-flushes", "--no-disk-drain"]),

      (8, 0, 12, "n", True, ["--no-md-flushes"]),

      ]

    # Versions that support everything

    for vmaj, vmin, vrel in ((8, 3, 0), (8, 3, 12)):

      tests.append((vmaj, vmin, vrel, "bfd", True,

                    ["--no-disk-barrier", "--no-disk-drain",

                     "--no-disk-flushes", "--no-md-flushes"]))

      tests.append((vmaj, vmin, vrel, "n", False, []))

      tests.append((vmaj, vmin, vrel, "b", True,

                    ["--no-disk-barrier", "--no-md-flushes"]))

      tests.append((vmaj, vmin, vrel, "fd", False,

                    ["--no-disk-flushes", "--no-disk-drain"]))

      tests.append((vmaj, vmin, vrel, "n", True, ["--no-md-flushes"]))

    # Test execution

    for test in tests:

      vmaj, vmin, vrel, disabled_barriers, disable_meta_flush, expected = test

      args = \

        bdev.DRBD8._ComputeDiskBarrierArgs(vmaj, vmin, vrel,

                                           disabled_barriers,

                                           disable_meta_flush)

      self.failUnless(set(args) == set(expected),

                      "For test %s, got wrong results %s" % (test, args))

    # Unsupported or invalid versions

    for vmaj, vmin, vrel in ((0, 7, 25), (9, 0, 0), (7, 0, 0), (8, 4, 0)):

      self.assertRaises(errors.BlockDeviceError,

                        bdev.DRBD8._ComputeDiskBarrierArgs,

                        vmaj, vmin, vrel, "n", True)

    # Invalid options

    for option in ("", "c", "whatever", "nbdfc", "nf"):

      self.assertRaises(errors.BlockDeviceError,

                        bdev.DRBD8._ComputeDiskBarrierArgs,

                        8, 3, 11, option, True)

class TestDRBD8Status(testutils.GanetiTestCase):

  """Testing case for DRBD8 /proc status"""

  def setUp(self):

    """Read in txt data"""

    testutils.GanetiTestCase.setUp(self)

    proc_data = self._TestDataFilename("proc_drbd8.txt")

    proc80e_data = self._TestDataFilename("proc_drbd80-emptyline.txt")

    proc83_data = self._TestDataFilename("proc_drbd83.txt")

    proc83_sync_data = self._TestDataFilename("proc_drbd83_sync.txt")

    proc83_sync_krnl_data = \

      self._TestDataFilename("proc_drbd83_sync_krnl2.6.39.txt")

    self.proc_data = bdev.DRBD8._GetProcData(filename=proc_data)

    self.proc80e_data = bdev.DRBD8._GetProcData(filename=proc80e_data)

    self.proc83_data = bdev.DRBD8._GetProcData(filename=proc83_data)

    self.proc83_sync_data = bdev.DRBD8._GetProcData(filename=proc83_sync_data)

    self.proc83_sync_krnl_data = \

      bdev.DRBD8._GetProcData(filename=proc83_sync_krnl_data)

    self.mass_data = bdev.DRBD8._MassageProcData(self.proc_data)

    self.mass80e_data = bdev.DRBD8._MassageProcData(self.proc80e_data)

    self.mass83_data = bdev.DRBD8._MassageProcData(self.proc83_data)

    self.mass83_sync_data = bdev.DRBD8._MassageProcData(self.proc83_sync_data)

    self.mass83_sync_krnl_data = \

      bdev.DRBD8._MassageProcData(self.proc83_sync_krnl_data)

  def testIOErrors(self):

    """Test handling of errors while reading the proc file."""

    temp_file = self._CreateTempFile()

    os.unlink(temp_file)

    self.failUnlessRaises(errors.BlockDeviceError,

                          bdev.DRBD8._GetProcData, filename=temp_file)

  def testHelper(self):

    """Test reading usermode_helper in /sys."""

    sys_drbd_helper = self._TestDataFilename("sys_drbd_usermode_helper.txt")

    drbd_helper = bdev.DRBD8.GetUsermodeHelper(filename=sys_drbd_helper)

    self.failUnlessEqual(drbd_helper, "/bin/true")

  def testHelperIOErrors(self):

    """Test handling of errors while reading usermode_helper in /sys."""

    temp_file = self._CreateTempFile()

    os.unlink(temp_file)

    self.failUnlessRaises(errors.BlockDeviceError,

                          bdev.DRBD8.GetUsermodeHelper, filename=temp_file)

  def testMinorNotFound(self):

    """Test not-found-minor in /proc"""

    self.failUnless(9 not in self.mass_data)

    self.failUnless(9 not in self.mass83_data)

    self.failUnless(3 not in self.mass80e_data)

  def testLineNotMatch(self):

    """Test wrong line passed to DRBD8Status"""

    self.assertRaises(errors.BlockDeviceError, bdev.DRBD8Status, "foo")

  def testMinor0(self):

    """Test connected, primary device"""

    for data in [self.mass_data, self.mass83_data]:

      stats = bdev.DRBD8Status(data[0])

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_primary and

                      stats.peer_secondary and stats.is_disk_uptodate)

  def testMinor1(self):

    """Test connected, secondary device"""

    for data in [self.mass_data, self.mass83_data]:

      stats = bdev.DRBD8Status(data[1])

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_secondary and

                      stats.peer_primary and stats.is_disk_uptodate)

  def testMinor2(self):

    """Test unconfigured device"""

    for data in [self.mass_data, self.mass83_data, self.mass80e_data]:

      stats = bdev.DRBD8Status(data[2])

      self.failIf(stats.is_in_use)

  def testMinor4(self):

    """Test WFconn device"""

    for data in [self.mass_data, self.mass83_data]:

      stats = bdev.DRBD8Status(data[4])

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_wfconn and stats.is_primary and

                      stats.rrole == 'Unknown' and

                      stats.is_disk_uptodate)

  def testMinor6(self):

    """Test diskless device"""

    for data in [self.mass_data, self.mass83_data]:

      stats = bdev.DRBD8Status(data[6])

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_connected and stats.is_secondary and

                      stats.peer_primary and stats.is_diskless)

  def testMinor8(self):

    """Test standalone device"""

    for data in [self.mass_data, self.mass83_data]:

      stats = bdev.DRBD8Status(data[8])

      self.failUnless(stats.is_in_use)

      self.failUnless(stats.is_standalone and

                      stats.rrole == 'Unknown' and

                      stats.is_disk_uptodate)

  def testDRBD83SyncFine(self):

    stats = bdev.DRBD8Status(self.mass83_sync_data[3])

    self.failUnless(stats.is_in_resync)

    self.failUnless(stats.sync_percent is not None)

  def testDRBD83SyncBroken(self):

    stats = bdev.DRBD8Status(self.mass83_sync_krnl_data[3])

    self.failUnless(stats.is_in_resync)

    self.failUnless(stats.sync_percent is not None)

class TestRADOSBlockDevice(testutils.GanetiTestCase):

  def test_ParseRbdShowmappedOutput(self):

    volume_name = "abc9778-8e8ace5b.rbd.disk0"

    output_ok = \

      ("0\trbd\te69f28e5-9817.rbd.disk0\t-\t/dev/rbd0\n"

       "1\t/dev/rbd0\tabc9778-8e8ace5b.rbd.disk0\t-\t/dev/rbd16\n"

       "line\twith\tfewer\tfields\n"

       "")

    output_empty = ""

    output_no_matches = \

      ("0\trbd\te69f28e5-9817.rbd.disk0\t-\t/dev/rbd0\n"

       "1\trbd\tabcdef01-9817.rbd.disk0\t-\t/dev/rbd10\n"

       "2\trbd\tcdef0123-9817.rbd.disk0\t-\t/dev/rbd12\n"

       "something\twith\tfewer\tfields"

       "")

    output_extra_matches = \

      ("0\t/dev/rbd0\tabc9778-8e8ace5b.rbd.disk0\t-\t/dev/rbd11\n"

       "1\trbd\te69f28e5-9817.rbd.disk0\t-\t/dev/rbd0\n"

       "2\t/dev/rbd0\tabc9778-8e8ace5b.rbd.disk0\t-\t/dev/rbd16\n"

       "something\twith\tfewer\tfields"

       "")

    parse_function = bdev.RADOSBlockDevice._ParseRbdShowmappedOutput

    self.assertEqual(parse_function(output_ok, volume_name), "/dev/rbd16")

    self.assertRaises(errors.BlockDeviceError, parse_function,

                      output_empty, volume_name)

    self.assertEqual(parse_function(output_no_matches, volume_name), None)

    self.assertRaises(errors.BlockDeviceError, parse_function,

                      output_extra_matches, volume_name)

if __name__ == '__main__':

  testutils.GanetiTestProgram()