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#!/usr/bin/python

#

# Copyright (C) 2010, 2012, 2013 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 tools/cfgupgrade"""

import os

import sys

import unittest

import shutil

import tempfile

import operator

from ganeti import constants

from ganeti import utils

from ganeti import serializer

from ganeti import netutils

import testutils

def GetMinimalConfig():

  return {

    "version": constants.CONFIG_VERSION,

    "cluster": {

      "master_node": "node1-uuid"

    },

    "instances": {},

    "nodegroups": {},

    "nodes": {

      "node1-uuid": {

        "name": "node1",

        "uuid": "node1-uuid"

      }

    },

  }

def _RunUpgrade(path, dry_run, no_verify, ignore_hostname=True,

                downgrade=False):

  cmd = [sys.executable, "%s/tools/cfgupgrade" % testutils.GetSourceDir(),

         "--debug", "--force", "--path=%s" % path, "--confdir=%s" % path]

  if ignore_hostname:

    cmd.append("--ignore-hostname")

  if dry_run:

    cmd.append("--dry-run")

  if no_verify:

    cmd.append("--no-verify")

  if downgrade:

    cmd.append("--downgrade")

  result = utils.RunCmd(cmd, cwd=os.getcwd())

  if result.failed:

    raise Exception("cfgupgrade failed: %s, output %r" %

                    (result.fail_reason, result.output))

class TestCfgupgrade(unittest.TestCase):

  def setUp(self):

    self.tmpdir = tempfile.mkdtemp()

    self.config_path = utils.PathJoin(self.tmpdir, "config.data")

    self.noded_cert_path = utils.PathJoin(self.tmpdir, "server.pem")

    self.rapi_cert_path = utils.PathJoin(self.tmpdir, "rapi.pem")

    self.rapi_users_path = utils.PathJoin(self.tmpdir, "rapi", "users")

    self.rapi_users_path_pre24 = utils.PathJoin(self.tmpdir, "rapi_users")

    self.known_hosts_path = utils.PathJoin(self.tmpdir, "known_hosts")

    self.confd_hmac_path = utils.PathJoin(self.tmpdir, "hmac.key")

    self.cds_path = utils.PathJoin(self.tmpdir, "cluster-domain-secret")

    self.ss_master_node_path = utils.PathJoin(self.tmpdir, "ssconf_master_node")

    self.file_storage_paths = utils.PathJoin(self.tmpdir, "file-storage-paths")

  def tearDown(self):

    shutil.rmtree(self.tmpdir)

  def _LoadConfig(self):

    return serializer.LoadJson(utils.ReadFile(self.config_path))

  def _LoadTestDataConfig(self, filename):

    return serializer.LoadJson(testutils.ReadTestData(filename))

  def _CreateValidConfigDir(self):

    utils.WriteFile(self.noded_cert_path, data="")

    utils.WriteFile(self.known_hosts_path, data="")

    utils.WriteFile(self.ss_master_node_path,

                    data="node.has.another.name.example.net")

  def testNoConfigDir(self):

    self.assertFalse(utils.ListVisibleFiles(self.tmpdir))

    self.assertRaises(Exception, _RunUpgrade, self.tmpdir, False, True)

    self.assertRaises(Exception, _RunUpgrade, self.tmpdir, True, True)

  def testWrongHostname(self):

    self._CreateValidConfigDir()

    utils.WriteFile(self.config_path,

                    data=serializer.DumpJson(GetMinimalConfig()))

    hostname = netutils.GetHostname().name

    assert hostname != utils.ReadOneLineFile(self.ss_master_node_path)

    self.assertRaises(Exception, _RunUpgrade, self.tmpdir, False, True,

                      ignore_hostname=False)

  def testCorrectHostname(self):

    self._CreateValidConfigDir()

    utils.WriteFile(self.config_path,

                    data=serializer.DumpJson(GetMinimalConfig()))

    utils.WriteFile(self.ss_master_node_path,

                    data="%s\n" % netutils.GetHostname().name)

    _RunUpgrade(self.tmpdir, False, True, ignore_hostname=False)

  def testInconsistentConfig(self):

    self._CreateValidConfigDir()

    # There should be no "config_version"

    cfg = GetMinimalConfig()

    cfg["version"] = 0

    cfg["cluster"]["config_version"] = 0

    utils.WriteFile(self.config_path, data=serializer.DumpJson(cfg))

    self.assertRaises(Exception, _RunUpgrade, self.tmpdir, False, True)

  def testInvalidConfig(self):

    self._CreateValidConfigDir()

    # Missing version from config

    utils.WriteFile(self.config_path, data=serializer.DumpJson({}))

    self.assertRaises(Exception, _RunUpgrade, self.tmpdir, False, True)

  def _TestUpgradeFromFile(self, filename, dry_run):

    cfg = self._LoadTestDataConfig(filename)

    self._TestUpgradeFromData(cfg, dry_run)

  def _TestSimpleUpgrade(self, from_version, dry_run,

                         file_storage_dir=None,

                         shared_file_storage_dir=None):

    cfg = GetMinimalConfig()

    cfg["version"] = from_version

    cluster = cfg["cluster"]

    if file_storage_dir:

      cluster["file_storage_dir"] = file_storage_dir

    if shared_file_storage_dir:

      cluster["shared_file_storage_dir"] = shared_file_storage_dir

    self._TestUpgradeFromData(cfg, dry_run)

  def _TestUpgradeFromData(self, cfg, dry_run):

    assert "version" in cfg

    from_version = cfg["version"]

    self._CreateValidConfigDir()

    utils.WriteFile(self.config_path, data=serializer.DumpJson(cfg))

    self.assertFalse(os.path.isfile(self.rapi_cert_path))

    self.assertFalse(os.path.isfile(self.confd_hmac_path))

    self.assertFalse(os.path.isfile(self.cds_path))

    _RunUpgrade(self.tmpdir, dry_run, True)

    if dry_run:

      expversion = from_version

      checkfn = operator.not_

    else:

      expversion = constants.CONFIG_VERSION

      checkfn = operator.truth

    self.assert_(checkfn(os.path.isfile(self.rapi_cert_path)))

    self.assert_(checkfn(os.path.isfile(self.confd_hmac_path)))

    self.assert_(checkfn(os.path.isfile(self.cds_path)))

    newcfg = self._LoadConfig()

    self.assertEqual(newcfg["version"], expversion)

  def testRapiUsers(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    self.assertFalse(os.path.exists(os.path.dirname(self.rapi_users_path)))

    utils.WriteFile(self.rapi_users_path_pre24, data="some user\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), False)

    self.assertTrue(os.path.isdir(os.path.dirname(self.rapi_users_path)))

    self.assert_(os.path.islink(self.rapi_users_path_pre24))

    self.assert_(os.path.isfile(self.rapi_users_path))

    self.assertEqual(os.readlink(self.rapi_users_path_pre24),

                     self.rapi_users_path)

    for path in [self.rapi_users_path, self.rapi_users_path_pre24]:

      self.assertEqual(utils.ReadFile(path), "some user\n")

  def testRapiUsers24AndAbove(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    os.mkdir(os.path.dirname(self.rapi_users_path))

    utils.WriteFile(self.rapi_users_path, data="other user\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), False)

    self.assert_(os.path.islink(self.rapi_users_path_pre24))

    self.assert_(os.path.isfile(self.rapi_users_path))

    self.assertEqual(os.readlink(self.rapi_users_path_pre24),

                     self.rapi_users_path)

    for path in [self.rapi_users_path, self.rapi_users_path_pre24]:

      self.assertEqual(utils.ReadFile(path), "other user\n")

  def testRapiUsersExistingSymlink(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    os.mkdir(os.path.dirname(self.rapi_users_path))

    os.symlink(self.rapi_users_path, self.rapi_users_path_pre24)

    utils.WriteFile(self.rapi_users_path, data="hello world\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 2, 0), False)

    self.assert_(os.path.isfile(self.rapi_users_path) and

                 not os.path.islink(self.rapi_users_path))

    self.assert_(os.path.islink(self.rapi_users_path_pre24))

    self.assertEqual(os.readlink(self.rapi_users_path_pre24),

                     self.rapi_users_path)

    for path in [self.rapi_users_path, self.rapi_users_path_pre24]:

      self.assertEqual(utils.ReadFile(path), "hello world\n")

  def testRapiUsersExistingTarget(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    os.mkdir(os.path.dirname(self.rapi_users_path))

    utils.WriteFile(self.rapi_users_path, data="other user\n")

    utils.WriteFile(self.rapi_users_path_pre24, data="hello world\n")

    self.assertRaises(Exception, self._TestSimpleUpgrade,

                      constants.BuildVersion(2, 2, 0), False)

    for path in [self.rapi_users_path, self.rapi_users_path_pre24]:

      self.assert_(os.path.isfile(path) and not os.path.islink(path))

    self.assertEqual(utils.ReadFile(self.rapi_users_path), "other user\n")

    self.assertEqual(utils.ReadFile(self.rapi_users_path_pre24),

                     "hello world\n")

  def testRapiUsersDryRun(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    utils.WriteFile(self.rapi_users_path_pre24, data="some user\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), True)

    self.assertFalse(os.path.isdir(os.path.dirname(self.rapi_users_path)))

    self.assertTrue(os.path.isfile(self.rapi_users_path_pre24) and

                    not os.path.islink(self.rapi_users_path_pre24))

    self.assertFalse(os.path.exists(self.rapi_users_path))

  def testRapiUsers24AndAboveDryRun(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    os.mkdir(os.path.dirname(self.rapi_users_path))

    utils.WriteFile(self.rapi_users_path, data="other user\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), True)

    self.assertTrue(os.path.isfile(self.rapi_users_path) and

                    not os.path.islink(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    self.assertEqual(utils.ReadFile(self.rapi_users_path), "other user\n")

  def testRapiUsersExistingSymlinkDryRun(self):

    self.assertFalse(os.path.exists(self.rapi_users_path))

    self.assertFalse(os.path.exists(self.rapi_users_path_pre24))

    os.mkdir(os.path.dirname(self.rapi_users_path))

    os.symlink(self.rapi_users_path, self.rapi_users_path_pre24)

    utils.WriteFile(self.rapi_users_path, data="hello world\n")

    self._TestSimpleUpgrade(constants.BuildVersion(2, 2, 0), True)

    self.assertTrue(os.path.islink(self.rapi_users_path_pre24))

    self.assertTrue(os.path.isfile(self.rapi_users_path) and

                    not os.path.islink(self.rapi_users_path))

    self.assertEqual(os.readlink(self.rapi_users_path_pre24),

                     self.rapi_users_path)

    for path in [self.rapi_users_path, self.rapi_users_path_pre24]:

      self.assertEqual(utils.ReadFile(path), "hello world\n")

  def testFileStoragePathsDryRun(self):

    self.assertFalse(os.path.exists(self.file_storage_paths))

    self._TestSimpleUpgrade(constants.BuildVersion(2, 6, 0), True,

                            file_storage_dir=self.tmpdir,

                            shared_file_storage_dir="/tmp")

    self.assertFalse(os.path.exists(self.file_storage_paths))

  def testFileStoragePathsBoth(self):

    self.assertFalse(os.path.exists(self.file_storage_paths))

    self._TestSimpleUpgrade(constants.BuildVersion(2, 6, 0), False,

                            file_storage_dir=self.tmpdir,

                            shared_file_storage_dir="/tmp")

    lines = utils.ReadFile(self.file_storage_paths).splitlines()

    self.assertTrue(lines.pop(0).startswith("# "))

    self.assertTrue(lines.pop(0).startswith("# cfgupgrade"))

    self.assertEqual(lines.pop(0), self.tmpdir)

    self.assertEqual(lines.pop(0), "/tmp")

    self.assertFalse(lines)

    self.assertEqual(os.stat(self.file_storage_paths).st_mode & 0777,

                     0600, msg="Wrong permissions")

  def testFileStoragePathsSharedOnly(self):

    self.assertFalse(os.path.exists(self.file_storage_paths))

    self._TestSimpleUpgrade(constants.BuildVersion(2, 5, 0), False,

                            file_storage_dir=None,

                            shared_file_storage_dir=self.tmpdir)

    lines = utils.ReadFile(self.file_storage_paths).splitlines()

    self.assertTrue(lines.pop(0).startswith("# "))

    self.assertTrue(lines.pop(0).startswith("# cfgupgrade"))

    self.assertEqual(lines.pop(0), self.tmpdir)

    self.assertFalse(lines)

  def testUpgradeFrom_2_0(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 0, 0), False)

  def testUpgradeFrom_2_1(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 1, 0), False)

  def testUpgradeFrom_2_2(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 2, 0), False)

  def testUpgradeFrom_2_3(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), False)

  def testUpgradeFrom_2_4(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 4, 0), False)

  def testUpgradeFrom_2_5(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 5, 0), False)

  def testUpgradeFrom_2_6(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 6, 0), False)

  def testUpgradeFrom_2_7(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 7, 0), False)

  def testUpgradeFullConfigFrom_2_7(self):

    self._TestUpgradeFromFile("cluster_config_2.7.json", False)

  def testUpgradeFullConfigFrom_2_8(self):

    self._TestUpgradeFromFile("cluster_config_2.8.json", False)

  def testUpgradeCurrent(self):

    self._TestSimpleUpgrade(constants.CONFIG_VERSION, False)

  def _RunDowngradeUpgrade(self):

    oldconf = self._LoadConfig()

    _RunUpgrade(self.tmpdir, False, True, downgrade=True)

    _RunUpgrade(self.tmpdir, False, True)

    newconf = self._LoadConfig()

    self.assertEqual(oldconf, newconf)

  def testDowngrade(self):

    self._TestSimpleUpgrade(constants.CONFIG_VERSION, False)

    self._RunDowngradeUpgrade()

  def testDowngradeFullConfig(self):

    """Test for upgrade + downgrade combination."""

    # This test can work only with the previous version of a configuration!

    oldconfname = "cluster_config_2.8.json"

    self._TestUpgradeFromFile(oldconfname, False)

    _RunUpgrade(self.tmpdir, False, True, downgrade=True)

    oldconf = self._LoadTestDataConfig(oldconfname)

    newconf = self._LoadConfig()

    self.assertEqual(oldconf, newconf)

  def testDowngradeFrom_2_9(self):

    cfg29_name = "cluster_config_2.9.json"

    cfg29 = self._LoadTestDataConfig(cfg29_name)

    self._CreateValidConfigDir()

    utils.WriteFile(self.config_path, data=serializer.DumpJson(cfg29))

    _RunUpgrade(self.tmpdir, False, True, downgrade=True)

    cfg28 = self._LoadConfig()

    hvparams = cfg28["cluster"]["hvparams"]

    for xen_variant in [constants.HT_XEN_PVM, constants.HT_XEN_HVM]:

      xen_params = hvparams[xen_variant]

      self.assertTrue(constants.HV_XEN_CMD not in xen_params)

  def testDowngradeFullConfigBackwardFrom_2_7(self):

    """Test for upgrade + downgrade + upgrade combination."""

    self._TestUpgradeFromFile("cluster_config_2.7.json", False)

    self._RunDowngradeUpgrade()

  def _RunDowngradeTwice(self):

    """Make sure that downgrade is idempotent."""

    _RunUpgrade(self.tmpdir, False, True, downgrade=True)

    oldconf = self._LoadConfig()

    _RunUpgrade(self.tmpdir, False, True, downgrade=True)

    newconf = self._LoadConfig()

    self.assertEqual(oldconf, newconf)

  def testDowngradeTwice(self):

    self._TestSimpleUpgrade(constants.CONFIG_VERSION, False)

    self._RunDowngradeTwice()

  def testDowngradeTwiceFullConfigFrom_2_7(self):

    self._TestUpgradeFromFile("cluster_config_2.7.json", False)

    self._RunDowngradeTwice()

  def testUpgradeDryRunFrom_2_0(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 0, 0), True)

  def testUpgradeDryRunFrom_2_1(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 1, 0), True)

  def testUpgradeDryRunFrom_2_2(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 2, 0), True)

  def testUpgradeDryRunFrom_2_3(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 3, 0), True)

  def testUpgradeDryRunFrom_2_4(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 4, 0), True)

  def testUpgradeDryRunFrom_2_5(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 5, 0), True)

  def testUpgradeDryRunFrom_2_6(self):

    self._TestSimpleUpgrade(constants.BuildVersion(2, 6, 0), True)

  def testUpgradeCurrentDryRun(self):

    self._TestSimpleUpgrade(constants.CONFIG_VERSION, True)

  def testDowngradeDryRun(self):

    self._TestSimpleUpgrade(constants.CONFIG_VERSION, False)

    oldconf = self._LoadConfig()

    _RunUpgrade(self.tmpdir, True, True, downgrade=True)

    newconf = self._LoadConfig()

    self.assertEqual(oldconf["version"], newconf["version"])

if __name__ == "__main__":

  testutils.GanetiTestProgram()