test/py/ganeti.masterd.iallocator_unittest.py

#!/usr/bin/python
#

# Copyright (C) 2012 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 testing ganeti.masterd.iallocator"""

import unittest

from ganeti import compat
from ganeti import constants
from ganeti import errors
from ganeti import objects
from ganeti import ht
from ganeti.masterd import iallocator

import testutils


class _StubIAllocator(object):
  def __init__(self, success):
    self.success = success


class TestIAReqMultiInstanceAlloc(unittest.TestCase):
  def testResult(self):
    good_results = [
      # First result (all instances "allocate")
      [
        [["foo", ["a", "b"]],
         ["bar", ["c"]],
         ["baz", []]],
        []
      ],
      # Second result (partial "allocate", partial "fail")
      [
        [["bar", ["c", "b"]],
         ["baz", ["a"]]],
        ["foo"]
      ],
      # Third result (all instances "fail")
      [
        [],
        ["foo", "bar", "baz"]
      ],
      ]
    bad_results = [
      "foobar",
      1234,
      [],
      [[]],
      [[], [], []],
      ]

    result_fn = iallocator.IAReqMultiInstanceAlloc.REQ_RESULT

    self.assertTrue(compat.all(map(result_fn, good_results)))
    self.assertFalse(compat.any(map(result_fn, bad_results)))


class TestIARequestBase(unittest.TestCase):
  def testValidateResult(self):
    class _StubReqBase(iallocator.IARequestBase):
      MODE = constants.IALLOCATOR_MODE_ALLOC
      REQ_RESULT = ht.TBool

    stub = _StubReqBase()
    stub.ValidateResult(_StubIAllocator(True), True)
    self.assertRaises(errors.ResultValidationError, stub.ValidateResult,
                      _StubIAllocator(True), "foo")
    stub.ValidateResult(_StubIAllocator(False), True)
    # We don't validate the result if the iallocation request was not successful
    stub.ValidateResult(_StubIAllocator(False), "foo")


class _FakeConfigWithNdParams:
  def GetNdParams(self, _):
    return None


class TestComputeBasicNodeData(unittest.TestCase):
  def setUp(self):
    self.fn = compat.partial(iallocator.IAllocator._ComputeBasicNodeData,
                             _FakeConfigWithNdParams())

  def testEmpty(self):
    self.assertEqual(self.fn({}, None), {})

  def testSimple(self):
    node1 = objects.Node(name="node1",
                         primary_ip="192.0.2.1",
                         secondary_ip="192.0.2.2",
                         offline=False,
                         drained=False,
                         master_candidate=True,
                         master_capable=True,
                         group="11112222",
                         vm_capable=False)

    node2 = objects.Node(name="node2",
                         primary_ip="192.0.2.3",
                         secondary_ip="192.0.2.4",
                         offline=True,
                         drained=False,
                         master_candidate=False,
                         master_capable=False,
                         group="11112222",
                         vm_capable=True)

    assert node1 != node2

    ninfo = {
      "#unused-1#": node1,
      "#unused-2#": node2,
      }

    self.assertEqual(self.fn(ninfo, None), {
      "node1": {
        "tags": [],
        "primary_ip": "192.0.2.1",
        "secondary_ip": "192.0.2.2",
        "offline": False,
        "drained": False,
        "master_candidate": True,
        "group": "11112222",
        "master_capable": True,
        "vm_capable": False,
        "ndparams": None,
        },
      "node2": {
        "tags": [],
        "primary_ip": "192.0.2.3",
        "secondary_ip": "192.0.2.4",
        "offline": True,
        "drained": False,
        "master_candidate": False,
        "group": "11112222",
        "master_capable": False,
        "vm_capable": True,
        "ndparams": None,
        },
      })

  def testOfflineNode(self):
    for whitelist in [None, [], set(), ["node1"], ["node2"]]:
      result = self.fn({
        "node1": objects.Node(name="node1", offline=True)
        }, whitelist)
      self.assertEqual(len(result), 1)
      self.assertTrue(result["node1"]["offline"])

  def testWhitelist(self):
    for whitelist in [None, [], set(), ["node1"], ["node2"]]:
      result = self.fn({
        "node1": objects.Node(name="node1", offline=False)
        }, whitelist)
      self.assertEqual(len(result), 1)

      if whitelist is None or "node1" in whitelist:
        self.assertFalse(result["node1"]["offline"])
      else:
        self.assertTrue(result["node1"]["offline"])

class TestProcessStorageInfo(unittest.TestCase):

  def setUp(self):
    self.free_storage_file = 23
    self.total_storage_file = 42
    self.free_storage_lvm = 69
    self.total_storage_lvm = 666
    self.space_info = [{"name": "mynode",
                       "type": constants.ST_FILE,
                       "storage_free": self.free_storage_file,
                       "storage_size": self.total_storage_file},
                      {"name": "mynode",
                       "type": constants.ST_LVM_VG,
                       "storage_free": self.free_storage_lvm,
                       "storage_size": self.total_storage_lvm},
                      {"name": "mynode",
                       "type": constants.ST_LVM_PV,
                       "storage_free": 33,
                       "storage_size": 44}]

  def testComputeStorageDataFromNodeInfoDefault(self):
    has_lvm = False
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfo(
            self.space_info, node_name, has_lvm)
    # FIXME: right now, iallocator ignores anything else than LVM, adjust
    # this test once that arbitrary storage is supported
    self.assertEqual(0, free_disk)
    self.assertEqual(0, total_disk)

  def testComputeStorageDataFromNodeInfoLvm(self):
    has_lvm = True
    node_name = "mynode"
    (total_disk, free_disk, total_spindles, free_spindles) = \
        iallocator.IAllocator._ComputeStorageDataFromSpaceInfo(
            self.space_info, node_name, has_lvm)
    self.assertEqual(self.free_storage_lvm, free_disk)
    self.assertEqual(self.total_storage_lvm, total_disk)


if __name__ == "__main__":
  testutils.GanetiTestProgram()