Synnefo » snf-ganeti

#!/usr/bin/python

#

# Copyright (C) 2009, 2011 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.

#

# 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 mcpu module"""

import unittest

import itertools

from ganeti import mcpu

from ganeti import opcodes

from ganeti import cmdlib

from ganeti import locking

from ganeti import constants

from ganeti.constants import \

    LOCK_ATTEMPTS_TIMEOUT, \

    LOCK_ATTEMPTS_MAXWAIT, \

    LOCK_ATTEMPTS_MINWAIT

import testutils

REQ_BGL_WHITELIST = frozenset([

  opcodes.OpClusterActivateMasterIp,

  opcodes.OpClusterDeactivateMasterIp,

  opcodes.OpClusterDestroy,

  opcodes.OpClusterPostInit,

  opcodes.OpClusterRename,

  opcodes.OpInstanceRename,

  opcodes.OpNodeAdd,

  opcodes.OpNodeRemove,

  opcodes.OpTestAllocator,

  ])

class TestLockAttemptTimeoutStrategy(unittest.TestCase):

  def testConstants(self):

    tpa = mcpu.LockAttemptTimeoutStrategy._TIMEOUT_PER_ATTEMPT

    self.assert_(len(tpa) > LOCK_ATTEMPTS_TIMEOUT / LOCK_ATTEMPTS_MAXWAIT)

    self.assert_(sum(tpa) >= LOCK_ATTEMPTS_TIMEOUT)

    self.assertTrue(LOCK_ATTEMPTS_TIMEOUT >= 1800,

                    msg="Waiting less than half an hour per priority")

    self.assertTrue(LOCK_ATTEMPTS_TIMEOUT <= 3600,

                    msg="Waiting more than an hour per priority")

  def testSimple(self):

    strat = mcpu.LockAttemptTimeoutStrategy(_random_fn=lambda: 0.5,

                                            _time_fn=lambda: 0.0)

    prev = None

    for i in range(len(strat._TIMEOUT_PER_ATTEMPT)):

      timeout = strat.NextAttempt()

      self.assert_(timeout is not None)

      self.assert_(timeout <= LOCK_ATTEMPTS_MAXWAIT)

      self.assert_(timeout >= LOCK_ATTEMPTS_MINWAIT)

      self.assert_(prev is None or timeout >= prev)

      prev = timeout

    for _ in range(10):

      self.assert_(strat.NextAttempt() is None)

class TestDispatchTable(unittest.TestCase):

  def test(self):

    for opcls in opcodes.OP_MAPPING.values():

      if not opcls.WITH_LU:

        continue

      self.assertTrue(opcls in mcpu.Processor.DISPATCH_TABLE,

                      msg="%s missing handler class" % opcls)

      # Check against BGL whitelist

      lucls = mcpu.Processor.DISPATCH_TABLE[opcls]

      if lucls.REQ_BGL:

        self.assertTrue(opcls in REQ_BGL_WHITELIST,

                        msg=("%s not whitelisted for BGL" % opcls.OP_ID))

      else:

        self.assertFalse(opcls in REQ_BGL_WHITELIST,

                         msg=("%s whitelisted for BGL, but doesn't use it" %

                              opcls.OP_ID))

class TestProcessResult(unittest.TestCase):

  def setUp(self):

    self._submitted = []

    self._count = itertools.count(200)

  def _Submit(self, jobs):

    job_ids = [self._count.next() for _ in jobs]

    self._submitted.extend(zip(job_ids, jobs))

    return job_ids

  def testNoJobs(self):

    for i in [object(), [], False, True, None, 1, 929, {}]:

      self.assertEqual(mcpu._ProcessResult(NotImplemented, NotImplemented, i),

                       i)

  def testDefaults(self):

    src = opcodes.OpTestDummy()

    res = mcpu._ProcessResult(self._Submit, src, cmdlib.ResultWithJobs([[

      opcodes.OpTestDelay(),

      opcodes.OpTestDelay(),

      ], [

      opcodes.OpTestDelay(),

      ]]))

    self.assertEqual(res, {

      constants.JOB_IDS_KEY: [200, 201],

      })

    (_, (op1, op2)) = self._submitted.pop(0)

    (_, (op3, )) = self._submitted.pop(0)

    self.assertRaises(IndexError, self._submitted.pop)

    for op in [op1, op2, op3]:

      self.assertTrue("OP_TEST_DUMMY" in op.comment)

      self.assertFalse(hasattr(op, "priority"))

      self.assertFalse(hasattr(op, "debug_level"))

  def testParams(self):

    src = opcodes.OpTestDummy(priority=constants.OP_PRIO_HIGH,

                              debug_level=3)

    res = mcpu._ProcessResult(self._Submit, src, cmdlib.ResultWithJobs([[

      opcodes.OpTestDelay(priority=constants.OP_PRIO_LOW),

      ], [

      opcodes.OpTestDelay(comment="foobar", debug_level=10),

      ]], other=True, value=range(10)))

    self.assertEqual(res, {

      constants.JOB_IDS_KEY: [200, 201],

      "other": True,

      "value": range(10),

      })

    (_, (op1, )) = self._submitted.pop(0)

    (_, (op2, )) = self._submitted.pop(0)

    self.assertRaises(IndexError, self._submitted.pop)

    self.assertEqual(op1.priority, constants.OP_PRIO_LOW)

    self.assertTrue("OP_TEST_DUMMY" in op1.comment)

    self.assertEqual(op1.debug_level, 3)

    self.assertEqual(op2.priority, constants.OP_PRIO_HIGH)

    self.assertEqual(op2.comment, "foobar")

    self.assertEqual(op2.debug_level, 3)

class _FakeLuWithLocks:

  def __init__(self, needed_locks, share_locks):

    self.needed_locks = needed_locks

    self.share_locks = share_locks

class _FakeGlm:

  def __init__(self, owning_nal):

    self._owning_nal = owning_nal

  def check_owned(self, level, names):

    assert level == locking.LEVEL_NODE_ALLOC

    assert names == locking.NAL

    return self._owning_nal

  def owning_all(self, level):

    return False

class TestVerifyLocks(unittest.TestCase):

  def testNoLocks(self):

    lu = _FakeLuWithLocks({}, {})

    glm = _FakeGlm(False)

    mcpu._VerifyLocks(lu, glm,

                      _mode_whitelist=NotImplemented,

                      _nal_whitelist=NotImplemented)

  def testNotAllSameMode(self):

    for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:

      lu = _FakeLuWithLocks({

        level: ["foo"],

        }, {

        level: 0,

        locking.LEVEL_NODE_ALLOC: 0,

        })

      glm = _FakeGlm(False)

      mcpu._VerifyLocks(lu, glm, _mode_whitelist=[], _nal_whitelist=[])

  def testDifferentMode(self):

    for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:

      lu = _FakeLuWithLocks({

        level: ["foo"],

        }, {

        level: 0,

        locking.LEVEL_NODE_ALLOC: 1,

        })

      glm = _FakeGlm(False)

      try:

        mcpu._VerifyLocks(lu, glm, _mode_whitelist=[], _nal_whitelist=[])

      except AssertionError, err:

        self.assertTrue("using the same mode as nodes" in str(err))

      else:

        self.fail("Exception not raised")

      # Once more with the whitelist

      mcpu._VerifyLocks(lu, glm, _mode_whitelist=[_FakeLuWithLocks],

                        _nal_whitelist=[])

  def testSameMode(self):

    for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:

      lu = _FakeLuWithLocks({

        level: ["foo"],

        locking.LEVEL_NODE_ALLOC: locking.ALL_SET,

        }, {

        level: 1,

        locking.LEVEL_NODE_ALLOC: 1,

        })

      glm = _FakeGlm(True)

      try:

        mcpu._VerifyLocks(lu, glm, _mode_whitelist=[_FakeLuWithLocks],

                          _nal_whitelist=[])

      except AssertionError, err:

        self.assertTrue("whitelisted to use different modes" in str(err))

      else:

        self.fail("Exception not raised")

      # Once more without the whitelist

      mcpu._VerifyLocks(lu, glm, _mode_whitelist=[], _nal_whitelist=[])

  def testAllWithoutAllocLock(self):

    for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:

      lu = _FakeLuWithLocks({

        level: locking.ALL_SET,

        }, {

        level: 0,

        locking.LEVEL_NODE_ALLOC: 0,

        })

      glm = _FakeGlm(False)

      try:

        mcpu._VerifyLocks(lu, glm, _mode_whitelist=[], _nal_whitelist=[])

      except AssertionError, err:

        self.assertTrue("allocation lock must be used if" in str(err))

      else:

        self.fail("Exception not raised")

      # Once more with the whitelist

      mcpu._VerifyLocks(lu, glm, _mode_whitelist=[],

                        _nal_whitelist=[_FakeLuWithLocks])

  def testAllWithAllocLock(self):

    for level in [locking.LEVEL_NODE, locking.LEVEL_NODE_RES]:

      lu = _FakeLuWithLocks({

        level: locking.ALL_SET,

        locking.LEVEL_NODE_ALLOC: locking.ALL_SET,

        }, {

        level: 0,

        locking.LEVEL_NODE_ALLOC: 0,

        })

      glm = _FakeGlm(True)

      try:

        mcpu._VerifyLocks(lu, glm, _mode_whitelist=[],

                          _nal_whitelist=[_FakeLuWithLocks])

      except AssertionError, err:

        self.assertTrue("whitelisted for not acquiring" in str(err))

      else:

        self.fail("Exception not raised")

      # Once more without the whitelist

      mcpu._VerifyLocks(lu, glm, _mode_whitelist=[], _nal_whitelist=[])

if __name__ == "__main__":

  testutils.GanetiTestProgram()