Synnefo » snf-ganeti

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"""QA tests for node groups.

"""

from ganeti import constants

from ganeti import query

from ganeti import utils

import qa_config

import qa_utils

from qa_utils import AssertCommand, AssertEqual, GetCommandOutput

def GetDefaultGroup():

  """Returns the default node group.

  """

  groups = qa_config.get("groups", {})

  return groups.get("group-with-nodes", constants.INITIAL_NODE_GROUP_NAME)

def TestGroupAddRemoveRename():

  """gnt-group add/remove/rename"""

  existing_group_with_nodes = GetDefaultGroup()

  (group1, group2, group3) = qa_utils.GetNonexistentGroups(3)

  AssertCommand(["gnt-group", "add", group1])

  AssertCommand(["gnt-group", "add", group2])

  AssertCommand(["gnt-group", "add", group2], fail=True)

  AssertCommand(["gnt-group", "add", existing_group_with_nodes], fail=True)

  AssertCommand(["gnt-group", "rename", group1, group2], fail=True)

  AssertCommand(["gnt-group", "rename", group1, group3])

  try:

    AssertCommand(["gnt-group", "rename", existing_group_with_nodes, group1])

    AssertCommand(["gnt-group", "remove", group2])

    AssertCommand(["gnt-group", "remove", group3])

    AssertCommand(["gnt-group", "remove", group1], fail=True)

  finally:

    # Try to ensure idempotency re groups that already existed.

    AssertCommand(["gnt-group", "rename", group1, existing_group_with_nodes])

def TestGroupAddWithOptions():

  """gnt-group add with options"""

  (group1, ) = qa_utils.GetNonexistentGroups(1)

  AssertCommand(["gnt-group", "add", "--alloc-policy", "notvalid", group1],

                fail=True)

  AssertCommand(["gnt-group", "add", "--alloc-policy", "last_resort",

                 "--node-parameters", "oob_program=/bin/true", group1])

  AssertCommand(["gnt-group", "remove", group1])

def _GetGroupIPolicy(groupname):

  """Return the run-time values of the cluster-level instance policy.

  @type groupname: string

  @param groupname: node group name

  @rtype: tuple

  @return: (policy, specs), where:

      - policy is a dictionary of the policy values, instance specs excluded

      - specs is a dictionary containing only the specs, using the internal

        format (see L{constants.IPOLICY_DEFAULTS} for an example), but without

        the standard values

  """

  info = qa_utils.GetObjectInfo(["gnt-group", "info", groupname])

  assert len(info) == 1

  policy = info[0]["Instance policy"]

  (ret_policy, ret_specs) = qa_utils.ParseIPolicy(policy)

  # Sanity checks

  assert "minmax" in ret_specs

  assert len(ret_specs["minmax"]) > 0

  assert len(ret_policy) > 0

  return (ret_policy, ret_specs)

def _TestGroupSetISpecs(groupname, new_specs=None, diff_specs=None,

                        fail=False, old_values=None):

  """Change instance specs on a group.

  At most one of new_specs or diff_specs can be specified.

  @type groupname: string

  @param groupname: group name

  @type new_specs: dict

  @param new_specs: new complete specs, in the same format returned by

      L{_GetGroupIPolicy}

  @type diff_specs: dict

  @param diff_specs: partial specs, it can be an incomplete specifications, but

      if min/max specs are specified, their number must match the number of the

      existing specs

  @type fail: bool

  @param fail: if the change is expected to fail

  @type old_values: tuple

  @param old_values: (old_policy, old_specs), as returned by

      L{_GetGroupIPolicy}

  @return: same as L{_GetGroupIPolicy}

  """

  build_cmd = lambda opts: ["gnt-group", "modify"] + opts + [groupname]

  get_policy = lambda: _GetGroupIPolicy(groupname)

  return qa_utils.TestSetISpecs(

    new_specs=new_specs, diff_specs=diff_specs,

    get_policy_fn=get_policy, build_cmd_fn=build_cmd,

    fail=fail, old_values=old_values)

def _TestGroupModifyISpecs(groupname):

  # This test is built on the assumption that the default ipolicy holds for

  # the node group under test

  old_values = _GetGroupIPolicy(groupname)

  samevals = dict((p, 4) for p in constants.ISPECS_PARAMETERS)

  base_specs = {

    constants.ISPECS_MINMAX: [{

      constants.ISPECS_MIN: samevals,

      constants.ISPECS_MAX: samevals,

      }],

    }

  mod_values = _TestGroupSetISpecs(groupname, new_specs=base_specs,

                                   old_values=old_values)

  for par in constants.ISPECS_PARAMETERS:

    # First make sure that the test works with good values

    good_specs = {

      constants.ISPECS_MINMAX: [{

        constants.ISPECS_MIN: {par: 8},

        constants.ISPECS_MAX: {par: 8},

        }],

      }

    mod_values = _TestGroupSetISpecs(groupname, diff_specs=good_specs,

                                     old_values=mod_values)

    bad_specs = {

      constants.ISPECS_MINMAX: [{

        constants.ISPECS_MIN: {par: 8},

        constants.ISPECS_MAX: {par: 4},

        }],

      }

    _TestGroupSetISpecs(groupname, diff_specs=bad_specs, fail=True,

                        old_values=mod_values)

  AssertCommand(["gnt-group", "modify", "--ipolicy-bounds-specs", "default",

                 groupname])

  AssertEqual(_GetGroupIPolicy(groupname), old_values)

  # Get the ipolicy command (from the cluster config)

  mnode = qa_config.GetMasterNode()

  addcmd = GetCommandOutput(mnode.primary, utils.ShellQuoteArgs([

    "gnt-group", "show-ispecs-cmd", "--include-defaults", groupname,

    ]))

  modcmd = ["gnt-group", "modify"]

  opts = addcmd.split()

  assert opts[0:2] == ["gnt-group", "add"]

  for k in range(2, len(opts) - 1):

    if opts[k].startswith("--ipolicy-"):

      assert k + 2 <= len(opts)

      modcmd.extend(opts[k:k + 2])

  modcmd.append(groupname)

  # Apply the ipolicy to the group and verify the result

  AssertCommand(modcmd)

  new_addcmd = GetCommandOutput(mnode.primary, utils.ShellQuoteArgs([

    "gnt-group", "show-ispecs-cmd", groupname,

    ]))

  AssertEqual(addcmd, new_addcmd)

def _TestGroupModifyIPolicy(groupname):

  _TestGroupModifyISpecs(groupname)

  # We assume that the default ipolicy holds

  (old_policy, old_specs) = _GetGroupIPolicy(groupname)

  for (par, setval, iname, expval) in [

    ("vcpu-ratio", 1.5, None, 1.5),

    ("spindle-ratio", 1.5, None, 1.5),

    ("disk-templates", constants.DT_PLAIN,

     "allowed disk templates", constants.DT_PLAIN)

    ]:

    if not iname:

      iname = par

    build_cmdline = lambda val: ["gnt-group", "modify", "--ipolicy-" + par,

                                 str(val), groupname]

    AssertCommand(build_cmdline(setval))

    (new_policy, new_specs) = _GetGroupIPolicy(groupname)

    AssertEqual(new_specs, old_specs)

    for (p, val) in new_policy.items():

      if p == iname:

        AssertEqual(val, expval)

      else:

        AssertEqual(val, old_policy[p])

    AssertCommand(build_cmdline("default"))

    (new_policy, new_specs) = _GetGroupIPolicy(groupname)

    AssertEqual(new_specs, old_specs)

    AssertEqual(new_policy, old_policy)

def TestGroupModify():

  """gnt-group modify"""

  # This tests assumes LVM to be enabled, thus it should skip if

  # this is not the case

  if not qa_config.IsStorageTypeSupported(constants.ST_LVM_VG):

    return

  (group1, ) = qa_utils.GetNonexistentGroups(1)

  AssertCommand(["gnt-group", "add", group1])

  try:

    _TestGroupModifyIPolicy(group1)

    AssertCommand(["gnt-group", "modify", "--alloc-policy", "unallocable",

                   "--node-parameters", "oob_program=/bin/false", group1])

    AssertCommand(["gnt-group", "modify",

                   "--alloc-policy", "notvalid", group1], fail=True)

    AssertCommand(["gnt-group", "modify",

                   "--node-parameters", "spindle_count=10", group1])

    if qa_config.TestEnabled("htools"):

      AssertCommand(["hbal", "-L", "-G", group1])

    AssertCommand(["gnt-group", "modify",

                   "--node-parameters", "spindle_count=default", group1])

  finally:

    AssertCommand(["gnt-group", "remove", group1])

def TestGroupList():

  """gnt-group list"""

  qa_utils.GenericQueryTest("gnt-group", query.GROUP_FIELDS.keys())

def TestGroupListFields():

  """gnt-group list-fields"""

  qa_utils.GenericQueryFieldsTest("gnt-group", query.GROUP_FIELDS.keys())

def TestAssignNodesIncludingSplit(orig_group, node1, node2):

  """gnt-group assign-nodes --force

  Expects node1 and node2 to be primary and secondary for a common instance.

  """

  assert node1 != node2

  (other_group, ) = qa_utils.GetNonexistentGroups(1)

  master_node = qa_config.GetMasterNode().primary

  def AssertInGroup(group, nodes):

    real_output = GetCommandOutput(master_node,

                                   "gnt-node list --no-headers -o group " +

                                   utils.ShellQuoteArgs(nodes))

    AssertEqual(real_output.splitlines(), [group] * len(nodes))

  AssertInGroup(orig_group, [node1, node2])

  AssertCommand(["gnt-group", "add", other_group])

  try:

    AssertCommand(["gnt-group", "assign-nodes", other_group, node1, node2])

    AssertInGroup(other_group, [node1, node2])

    # This should fail because moving node1 to orig_group would leave their

    # common instance split between orig_group and other_group.

    AssertCommand(["gnt-group", "assign-nodes", orig_group, node1], fail=True)

    AssertInGroup(other_group, [node1, node2])

    AssertCommand(["gnt-group", "assign-nodes", "--force", orig_group, node1])

    AssertInGroup(orig_group, [node1])

    AssertInGroup(other_group, [node2])

    AssertCommand(["gnt-group", "assign-nodes", orig_group, node2])

    AssertInGroup(orig_group, [node1, node2])

  finally:

    AssertCommand(["gnt-group", "remove", other_group])