root / test / py / ganeti.storage.bdev_unittest.py @ f3ebe73e
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#!/usr/bin/python
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#
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# Copyright (C) 2006, 2007, 2010, 2012, 2013 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Script for unittesting the bdev module"""
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import os |
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import random |
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import unittest |
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from ganeti import compat |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import objects |
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from ganeti import utils |
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from ganeti.storage import bdev |
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import testutils |
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class TestRADOSBlockDevice(testutils.GanetiTestCase): |
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def setUp(self): |
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"""Set up input data"""
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testutils.GanetiTestCase.setUp(self)
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self.plain_output_old_ok = \
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testutils.ReadTestData("bdev-rbd/plain_output_old_ok.txt")
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self.plain_output_old_no_matches = \
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testutils.ReadTestData("bdev-rbd/plain_output_old_no_matches.txt")
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self.plain_output_old_extra_matches = \
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testutils.ReadTestData("bdev-rbd/plain_output_old_extra_matches.txt")
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self.plain_output_old_empty = \
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testutils.ReadTestData("bdev-rbd/plain_output_old_empty.txt")
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self.plain_output_new_ok = \
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testutils.ReadTestData("bdev-rbd/plain_output_new_ok.txt")
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self.plain_output_new_no_matches = \
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testutils.ReadTestData("bdev-rbd/plain_output_new_no_matches.txt")
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self.plain_output_new_extra_matches = \
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testutils.ReadTestData("bdev-rbd/plain_output_new_extra_matches.txt")
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# This file is completely empty, and as such it's not shipped.
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self.plain_output_new_empty = "" |
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self.json_output_ok = testutils.ReadTestData("bdev-rbd/json_output_ok.txt") |
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self.json_output_no_matches = \
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testutils.ReadTestData("bdev-rbd/json_output_no_matches.txt")
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self.json_output_extra_matches = \
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testutils.ReadTestData("bdev-rbd/json_output_extra_matches.txt")
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self.json_output_empty = \
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testutils.ReadTestData("bdev-rbd/json_output_empty.txt")
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self.output_invalid = testutils.ReadTestData("bdev-rbd/output_invalid.txt") |
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self.volume_name = "d7ab910a-4933-4ffe-88d0-faf2ce31390a.rbd.disk0" |
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def test_ParseRbdShowmappedJson(self): |
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parse_function = bdev.RADOSBlockDevice._ParseRbdShowmappedJson |
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self.assertEqual(parse_function(self.json_output_ok, self.volume_name), |
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"/dev/rbd3")
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self.assertEqual(parse_function(self.json_output_empty, self.volume_name), |
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None)
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self.assertEqual(parse_function(self.json_output_no_matches, |
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self.volume_name), None) |
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self.assertRaises(errors.BlockDeviceError, parse_function,
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self.json_output_extra_matches, self.volume_name) |
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self.assertRaises(errors.BlockDeviceError, parse_function,
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self.output_invalid, self.volume_name) |
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def test_ParseRbdShowmappedPlain(self): |
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parse_function = bdev.RADOSBlockDevice._ParseRbdShowmappedPlain |
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self.assertEqual(parse_function(self.plain_output_new_ok, |
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self.volume_name), "/dev/rbd3") |
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self.assertEqual(parse_function(self.plain_output_old_ok, |
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self.volume_name), "/dev/rbd3") |
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self.assertEqual(parse_function(self.plain_output_new_empty, |
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self.volume_name), None) |
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self.assertEqual(parse_function(self.plain_output_old_empty, |
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self.volume_name), None) |
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self.assertEqual(parse_function(self.plain_output_new_no_matches, |
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self.volume_name), None) |
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self.assertEqual(parse_function(self.plain_output_old_no_matches, |
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self.volume_name), None) |
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self.assertRaises(errors.BlockDeviceError, parse_function,
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self.plain_output_new_extra_matches, self.volume_name) |
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self.assertRaises(errors.BlockDeviceError, parse_function,
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self.plain_output_old_extra_matches, self.volume_name) |
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self.assertRaises(errors.BlockDeviceError, parse_function,
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self.output_invalid, self.volume_name) |
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class TestExclusiveStoragePvs(unittest.TestCase): |
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"""Test cases for functions dealing with LVM PV and exclusive storage"""
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# Allowance for rounding
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_EPS = 1e-4
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_MARGIN = constants.PART_MARGIN + constants.PART_RESERVED + _EPS |
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@staticmethod
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def _GenerateRandomPvInfo(rnd, name, vg): |
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# Granularity is .01 MiB
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size = rnd.randint(1024 * 100, 10 * 1024 * 1024 * 100) |
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if rnd.choice([False, True]): |
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free = float(rnd.randint(0, size)) / 100.0 |
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else:
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free = float(size) / 100.0 |
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size = float(size) / 100.0 |
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attr = "a-"
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return objects.LvmPvInfo(name=name, vg_name=vg, size=size, free=free,
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attributes=attr) |
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def testGetStdPvSize(self): |
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"""Test cases for bdev.LogicalVolume._GetStdPvSize()"""
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rnd = random.Random(9517)
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for _ in range(0, 50): |
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# Identical volumes
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pvi = self._GenerateRandomPvInfo(rnd, "disk", "myvg") |
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onesize = bdev.LogicalVolume._GetStdPvSize([pvi]) |
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self.assertTrue(onesize <= pvi.size)
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self.assertTrue(onesize > pvi.size * (1 - self._MARGIN)) |
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for length in range(2, 10): |
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n_size = bdev.LogicalVolume._GetStdPvSize([pvi] * length) |
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self.assertEqual(onesize, n_size)
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# Mixed volumes
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for length in range(1, 10): |
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pvlist = [self._GenerateRandomPvInfo(rnd, "disk", "myvg") |
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for _ in range(0, length)] |
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std_size = bdev.LogicalVolume._GetStdPvSize(pvlist) |
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self.assertTrue(compat.all(std_size <= pvi.size for pvi in pvlist)) |
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self.assertTrue(compat.any(std_size > pvi.size * (1 - self._MARGIN) |
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for pvi in pvlist)) |
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pvlist.append(pvlist[0])
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p1_size = bdev.LogicalVolume._GetStdPvSize(pvlist) |
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self.assertEqual(std_size, p1_size)
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def testComputeNumPvs(self): |
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"""Test cases for bdev.LogicalVolume._ComputeNumPvs()"""
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rnd = random.Random(8067)
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for _ in range(0, 1000): |
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pvlist = [self._GenerateRandomPvInfo(rnd, "disk", "myvg")] |
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lv_size = float(rnd.randint(10 * 100, 1024 * 1024 * 100)) / 100.0 |
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num_pv = bdev.LogicalVolume._ComputeNumPvs(lv_size, pvlist) |
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std_size = bdev.LogicalVolume._GetStdPvSize(pvlist) |
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self.assertTrue(num_pv >= 1) |
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self.assertTrue(num_pv * std_size >= lv_size)
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self.assertTrue((num_pv - 1) * std_size < lv_size * (1 + self._EPS)) |
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def testGetEmptyPvNames(self): |
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"""Test cases for bdev.LogicalVolume._GetEmptyPvNames()"""
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rnd = random.Random(21126)
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for _ in range(0, 100): |
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num_pvs = rnd.randint(1, 20) |
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pvlist = [self._GenerateRandomPvInfo(rnd, "disk%d" % n, "myvg") |
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for n in range(0, num_pvs)] |
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for num_req in range(1, num_pvs + 2): |
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epvs = bdev.LogicalVolume._GetEmptyPvNames(pvlist, num_req) |
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epvs_set = compat.UniqueFrozenset(epvs) |
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if len(epvs) > 1: |
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self.assertEqual(len(epvs), len(epvs_set)) |
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for pvi in pvlist: |
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if pvi.name in epvs_set: |
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self.assertEqual(pvi.size, pvi.free)
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else:
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# There should be no remaining empty PV when less than the
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# requeste number of PVs has been returned
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self.assertTrue(len(epvs) == num_req or pvi.free != pvi.size) |
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class TestLogicalVolume(unittest.TestCase): |
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"""Tests for bdev.LogicalVolume."""
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def testParseLvInfoLine(self): |
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"""Tests for LogicalVolume._ParseLvInfoLine."""
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broken_lines = [ |
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" toomuch#-wi-ao#253#3#4096.00#2#/dev/abc(20)",
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" -wi-ao#253#3#4096.00#/dev/abc(20)",
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" -wi-a#253#3#4096.00#2#/dev/abc(20)",
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" -wi-ao#25.3#3#4096.00#2#/dev/abc(20)",
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" -wi-ao#twenty#3#4096.00#2#/dev/abc(20)",
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" -wi-ao#253#3.1#4096.00#2#/dev/abc(20)",
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" -wi-ao#253#three#4096.00#2#/dev/abc(20)",
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" -wi-ao#253#3#four#2#/dev/abc(20)",
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" -wi-ao#253#3#4096..00#2#/dev/abc(20)",
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" -wi-ao#253#3#4096.00#2.0#/dev/abc(20)",
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" -wi-ao#253#3#4096.00#two#/dev/abc(20)",
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] |
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for broken in broken_lines: |
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self.assertRaises(errors.BlockDeviceError,
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bdev.LogicalVolume._ParseLvInfoLine, broken, "#")
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# Examples of good lines from "lvs":
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# -wi-ao|253|3|4096.00|2|/dev/sdb(144),/dev/sdc(0)
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# -wi-a-|253|4|4096.00|1|/dev/sdb(208)
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true_out = [ |
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("-wi-ao", 253, 3, 4096.00, 2, ["/dev/abc"]), |
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("-wi-a-", 253, 7, 4096.00, 4, ["/dev/abc"]), |
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("-ri-a-", 253, 4, 4.00, 5, ["/dev/abc", "/dev/def"]), |
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("-wc-ao", 15, 18, 4096.00, 32, ["/dev/abc", "/dev/def", "/dev/ghi0"]), |
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] |
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for exp in true_out: |
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for sep in "#;|": |
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pvs = ",".join("%s(%s)" % (d, i * 12) for (i, d) in enumerate(exp[-1])) |
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lvs_line = (sep.join((" %s", "%d", "%d", "%.2f", "%d", "%s")) % |
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(exp[0:-1] + (pvs,))) |
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parsed = bdev.LogicalVolume._ParseLvInfoLine(lvs_line, sep) |
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self.assertEqual(parsed, exp)
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@staticmethod
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def _FakeRunCmd(success, stdout): |
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if success:
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exit_code = 0
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else:
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exit_code = 1
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return lambda cmd: utils.RunResult(exit_code, None, stdout, "", cmd, |
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utils.process._TIMEOUT_NONE, 5)
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def testGetLvInfo(self): |
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"""Tests for LogicalVolume._GetLvInfo."""
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self.assertRaises(errors.BlockDeviceError, bdev.LogicalVolume._GetLvInfo,
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"fake_path",
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_run_cmd=self._FakeRunCmd(False, "Fake error msg")) |
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self.assertRaises(errors.BlockDeviceError, bdev.LogicalVolume._GetLvInfo,
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"fake_path", _run_cmd=self._FakeRunCmd(True, "")) |
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self.assertRaises(errors.BlockDeviceError, bdev.LogicalVolume._GetLvInfo,
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"fake_path", _run_cmd=self._FakeRunCmd(True, "BadStdOut")) |
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good_line = " -wi-ao|253|3|4096.00|2|/dev/abc(20)"
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fake_cmd = self._FakeRunCmd(True, good_line) |
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good_res = bdev.LogicalVolume._GetLvInfo("fake_path", _run_cmd=fake_cmd)
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# If the same line is repeated, the result should be the same
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for lines in [ |
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[good_line] * 2,
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[good_line] * 3,
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]: |
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fake_cmd = self._FakeRunCmd(True, "\n".join(lines)) |
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same_res = bdev.LogicalVolume._GetLvInfo("fake_path", fake_cmd)
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self.assertEqual(same_res, good_res)
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# Complex multi-line examples
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one_line = " -wi-ao|253|3|4096.00|2|/dev/sda(20),/dev/sdb(50),/dev/sdc(0)"
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fake_cmd = self._FakeRunCmd(True, one_line) |
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one_res = bdev.LogicalVolume._GetLvInfo("fake_path", _run_cmd=fake_cmd)
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# These should give the same results
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for multi_lines in [ |
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(" -wi-ao|253|3|4096.00|2|/dev/sda(30),/dev/sdb(50)\n"
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" -wi-ao|253|3|4096.00|2|/dev/sdb(200),/dev/sdc(300)"),
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(" -wi-ao|253|3|4096.00|2|/dev/sda(0)\n"
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" -wi-ao|253|3|4096.00|2|/dev/sdb(20)\n"
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" -wi-ao|253|3|4096.00|2|/dev/sdc(30)"),
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(" -wi-ao|253|3|4096.00|2|/dev/sda(20)\n"
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" -wi-ao|253|3|4096.00|2|/dev/sdb(50),/dev/sdc(0)"),
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]: |
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fake_cmd = self._FakeRunCmd(True, multi_lines) |
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multi_res = bdev.LogicalVolume._GetLvInfo("fake_path", _run_cmd=fake_cmd)
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self.assertEqual(multi_res, one_res)
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if __name__ == "__main__": |
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testutils.GanetiTestProgram() |