test/py/ganeti.storage.container_unittest.py

#!/usr/bin/python
#

# Copyright (C) 2012 Google Inc.
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"""Script for testing ganeti.storage.container"""

import re
import unittest
import random

from ganeti import constants
from ganeti import utils
from ganeti import compat
from ganeti import errors
from ganeti.storage import container

import testutils


class TestVGReduce(testutils.GanetiTestCase):
  VGNAME = "xenvg"
  LIST_CMD = container.LvmVgStorage.LIST_COMMAND
  VGREDUCE_CMD = container.LvmVgStorage.VGREDUCE_COMMAND

  def _runCmd(self, cmd, **kwargs):
    if not self.run_history:
      self.fail("Empty run results")
    exp_cmd, result = self.run_history.pop(0)
    self.assertEqual(cmd, exp_cmd)
    return result

  def testOldVersion(self):
    lvmvg = container.LvmVgStorage()
    stdout = testutils.ReadTestData("vgreduce-removemissing-2.02.02.txt")
    vgs_fail = testutils.ReadTestData("vgs-missing-pvs-2.02.02.txt")
    self.run_history = [
      ([self.VGREDUCE_CMD, "--removemissing", self.VGNAME],
       utils.RunResult(0, None, stdout, "", "", None, None)),
      ([self.LIST_CMD, "--noheadings", "--nosuffix", self.VGNAME],
       utils.RunResult(0, None, "", "", "", None, None)),
      ]
    lvmvg._RemoveMissing(self.VGNAME, _runcmd_fn=self._runCmd)
    self.assertEqual(self.run_history, [])
    for ecode, out in [(1, ""), (0, vgs_fail)]:
      self.run_history = [
        ([self.VGREDUCE_CMD, "--removemissing", self.VGNAME],
         utils.RunResult(0, None, stdout, "", "", None, None)),
        ([self.LIST_CMD, "--noheadings", "--nosuffix", self.VGNAME],
         utils.RunResult(ecode, None, out, "", "", None, None)),
        ]
      self.assertRaises(errors.StorageError, lvmvg._RemoveMissing, self.VGNAME,
                        _runcmd_fn=self._runCmd)
      self.assertEqual(self.run_history, [])

  def testNewVersion(self):
    lvmvg = container.LvmVgStorage()
    stdout1 = testutils.ReadTestData("vgreduce-removemissing-2.02.66-fail.txt")
    stdout2 = testutils.ReadTestData("vgreduce-removemissing-2.02.66-ok.txt")
    vgs_fail = testutils.ReadTestData("vgs-missing-pvs-2.02.66.txt")
    # first: require --fail, check that it's used
    self.run_history = [
      ([self.VGREDUCE_CMD, "--removemissing", self.VGNAME],
       utils.RunResult(0, None, stdout1, "", "", None, None)),
      ([self.VGREDUCE_CMD, "--removemissing", "--force", self.VGNAME],
       utils.RunResult(0, None, stdout2, "", "", None, None)),
      ([self.LIST_CMD, "--noheadings", "--nosuffix", self.VGNAME],
       utils.RunResult(0, None, "", "", "", None, None)),
      ]
    lvmvg._RemoveMissing(self.VGNAME, _runcmd_fn=self._runCmd)
    self.assertEqual(self.run_history, [])
    # second: make sure --fail is not used if not needed
    self.run_history = [
      ([self.VGREDUCE_CMD, "--removemissing", self.VGNAME],
       utils.RunResult(0, None, stdout2, "", "", None, None)),
      ([self.LIST_CMD, "--noheadings", "--nosuffix", self.VGNAME],
       utils.RunResult(0, None, "", "", "", None, None)),
      ]
    lvmvg._RemoveMissing(self.VGNAME, _runcmd_fn=self._runCmd)
    self.assertEqual(self.run_history, [])
    # third: make sure we error out if vgs doesn't find the volume
    for ecode, out in [(1, ""), (0, vgs_fail)]:
      self.run_history = [
        ([self.VGREDUCE_CMD, "--removemissing", self.VGNAME],
         utils.RunResult(0, None, stdout1, "", "", None, None)),
        ([self.VGREDUCE_CMD, "--removemissing", "--force", self.VGNAME],
         utils.RunResult(0, None, stdout2, "", "", None, None)),
        ([self.LIST_CMD, "--noheadings", "--nosuffix", self.VGNAME],
         utils.RunResult(ecode, None, out, "", "", None, None)),
        ]
      self.assertRaises(errors.StorageError, lvmvg._RemoveMissing, self.VGNAME,
                        _runcmd_fn=self._runCmd)
      self.assertEqual(self.run_history, [])


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