root / qa / qa_config.py @ 345d395d
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#
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# Copyright (C) 2007, 2011, 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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"""QA configuration.
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"""
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import os |
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from ganeti import constants |
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from ganeti import utils |
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from ganeti import serializer |
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from ganeti import compat |
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from ganeti import ht |
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import qa_error |
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_INSTANCE_CHECK_KEY = "instance-check"
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_ENABLED_HV_KEY = "enabled-hypervisors"
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_VCLUSTER_MASTER_KEY = "vcluster-master"
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_VCLUSTER_BASEDIR_KEY = "vcluster-basedir"
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_ENABLED_DISK_TEMPLATES_KEY = "enabled-disk-templates"
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#: QA configuration (L{_QaConfig})
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_config = None
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class _QaInstance(object): |
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__slots__ = [ |
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"name",
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"nicmac",
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"_used",
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"_disk_template",
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] |
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def __init__(self, name, nicmac): |
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"""Initializes instances of this class.
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"""
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self.name = name
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self.nicmac = nicmac
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self._used = None |
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self._disk_template = None |
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@classmethod
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def FromDict(cls, data): |
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"""Creates instance object from JSON dictionary.
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"""
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nicmac = [] |
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macaddr = data.get("nic.mac/0")
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if macaddr:
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nicmac.append(macaddr) |
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return cls(name=data["name"], nicmac=nicmac) |
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def __repr__(self): |
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status = [ |
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"%s.%s" % (self.__class__.__module__, self.__class__.__name__), |
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"name=%s" % self.name, |
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"nicmac=%s" % self.nicmac, |
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"used=%s" % self._used, |
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"disk_template=%s" % self._disk_template, |
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] |
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return "<%s at %#x>" % (" ".join(status), id(self)) |
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def Use(self): |
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"""Marks instance as being in use.
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"""
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assert not self._used |
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assert self._disk_template is None |
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self._used = True |
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def Release(self): |
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"""Releases instance and makes it available again.
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"""
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assert self._used, \ |
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("Instance '%s' was never acquired or released more than once" %
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self.name)
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self._used = False |
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self._disk_template = None |
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def GetNicMacAddr(self, idx, default): |
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"""Returns MAC address for NIC.
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@type idx: int
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@param idx: NIC index
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@param default: Default value
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"""
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if len(self.nicmac) > idx: |
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return self.nicmac[idx] |
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else:
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return default
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def SetDiskTemplate(self, template): |
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"""Set the disk template.
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"""
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assert template in constants.DISK_TEMPLATES |
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self._disk_template = template
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@property
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def used(self): |
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"""Returns boolean denoting whether instance is in use.
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"""
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return self._used |
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@property
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def disk_template(self): |
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"""Returns the current disk template.
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"""
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return self._disk_template |
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class _QaNode(object): |
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__slots__ = [ |
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"primary",
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"secondary",
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"_added",
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"_use_count",
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] |
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def __init__(self, primary, secondary): |
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"""Initializes instances of this class.
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"""
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self.primary = primary
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self.secondary = secondary
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self._added = False |
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self._use_count = 0 |
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@classmethod
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def FromDict(cls, data): |
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"""Creates node object from JSON dictionary.
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"""
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return cls(primary=data["primary"], secondary=data.get("secondary")) |
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def __repr__(self): |
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status = [ |
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"%s.%s" % (self.__class__.__module__, self.__class__.__name__), |
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"primary=%s" % self.primary, |
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"secondary=%s" % self.secondary, |
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"added=%s" % self._added, |
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"use_count=%s" % self._use_count, |
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] |
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return "<%s at %#x>" % (" ".join(status), id(self)) |
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def Use(self): |
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"""Marks a node as being in use.
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"""
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assert self._use_count >= 0 |
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self._use_count += 1 |
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return self |
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def Release(self): |
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"""Release a node (opposite of L{Use}).
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"""
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assert self.use_count > 0 |
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self._use_count -= 1 |
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def MarkAdded(self): |
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"""Marks node as having been added to a cluster.
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"""
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assert not self._added |
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self._added = True |
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def MarkRemoved(self): |
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"""Marks node as having been removed from a cluster.
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"""
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assert self._added |
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self._added = False |
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@property
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def added(self): |
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"""Returns whether a node is part of a cluster.
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"""
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return self._added |
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@property
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def use_count(self): |
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"""Returns number of current uses (controlled by L{Use} and L{Release}).
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"""
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return self._use_count |
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_RESOURCE_CONVERTER = { |
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"instances": _QaInstance.FromDict,
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"nodes": _QaNode.FromDict,
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} |
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def _ConvertResources((key, value)): |
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"""Converts cluster resources in configuration to Python objects.
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"""
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fn = _RESOURCE_CONVERTER.get(key, None)
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if fn:
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return (key, map(fn, value)) |
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else:
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return (key, value)
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class _QaConfig(object): |
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def __init__(self, data): |
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"""Initializes instances of this class.
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"""
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self._data = data
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#: Cluster-wide run-time value of the exclusive storage flag
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self._exclusive_storage = None |
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@classmethod
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def Load(cls, filename): |
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"""Loads a configuration file and produces a configuration object.
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@type filename: string
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@param filename: Path to configuration file
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@rtype: L{_QaConfig}
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"""
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data = serializer.LoadJson(utils.ReadFile(filename)) |
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result = cls(dict(map(_ConvertResources, |
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data.items()))) # pylint: disable=E1103
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result.Validate() |
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return result
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def Validate(self): |
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"""Validates loaded configuration data.
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"""
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if not self.get("name"): |
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raise qa_error.Error("Cluster name is required") |
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if not self.get("nodes"): |
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raise qa_error.Error("Need at least one node") |
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if not self.get("instances"): |
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raise qa_error.Error("Need at least one instance") |
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disks = self.GetDiskOptions()
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if disks is None: |
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raise qa_error.Error("Config option 'disks' must exist") |
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else:
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for d in disks: |
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if d.get("size") is None or d.get("growth") is None: |
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raise qa_error.Error("Config options `size` and `growth` must exist" |
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" for all `disks` items")
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check = self.GetInstanceCheckScript()
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if check:
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try:
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os.stat(check) |
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except EnvironmentError, err: |
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raise qa_error.Error("Can't find instance check script '%s': %s" % |
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(check, err)) |
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enabled_hv = frozenset(self.GetEnabledHypervisors()) |
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if not enabled_hv: |
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raise qa_error.Error("No hypervisor is enabled") |
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difference = enabled_hv - constants.HYPER_TYPES |
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if difference:
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raise qa_error.Error("Unknown hypervisor(s) enabled: %s" % |
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utils.CommaJoin(difference)) |
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(vc_master, vc_basedir) = self.GetVclusterSettings()
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if bool(vc_master) != bool(vc_basedir): |
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raise qa_error.Error("All or none of the config options '%s' and '%s'" |
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" must be set" %
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(_VCLUSTER_MASTER_KEY, _VCLUSTER_BASEDIR_KEY)) |
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if vc_basedir and not utils.IsNormAbsPath(vc_basedir): |
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raise qa_error.Error("Path given in option '%s' must be absolute and" |
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" normalized" % _VCLUSTER_BASEDIR_KEY)
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def __getitem__(self, name): |
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"""Returns configuration value.
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@type name: string
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@param name: Name of configuration entry
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"""
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return self._data[name] |
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def get(self, name, default=None): |
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"""Returns configuration value.
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@type name: string
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@param name: Name of configuration entry
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@param default: Default value
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"""
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return self._data.get(name, default) |
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def GetMasterNode(self): |
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"""Returns the default master node for the cluster.
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"""
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return self["nodes"][0] |
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def GetInstanceCheckScript(self): |
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"""Returns path to instance check script or C{None}.
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"""
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return self._data.get(_INSTANCE_CHECK_KEY, None) |
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def GetEnabledHypervisors(self): |
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"""Returns list of enabled hypervisors.
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@rtype: list
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"""
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return self._GetStringListParameter( |
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_ENABLED_HV_KEY, |
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[constants.DEFAULT_ENABLED_HYPERVISOR]) |
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def GetDefaultHypervisor(self): |
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"""Returns the default hypervisor to be used.
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"""
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return self.GetEnabledHypervisors()[0] |
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def GetEnabledDiskTemplates(self): |
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"""Returns the list of enabled disk templates.
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@rtype: list
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"""
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return self._GetStringListParameter( |
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_ENABLED_DISK_TEMPLATES_KEY, |
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constants.DEFAULT_ENABLED_DISK_TEMPLATES) |
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def GetDefaultDiskTemplate(self): |
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"""Returns the default disk template to be used.
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"""
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return self.GetEnabledDiskTemplates()[0] |
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def _GetStringListParameter(self, key, default_values): |
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"""Retrieves a parameter's value that is supposed to be a list of strings.
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@rtype: list
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"""
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try:
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value = self._data[key]
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except KeyError: |
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return default_values
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else:
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if value is None: |
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return []
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elif isinstance(value, basestring): |
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return value.split(",") |
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else:
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return value
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def SetExclusiveStorage(self, value): |
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"""Set the expected value of the C{exclusive_storage} flag for the cluster.
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"""
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self._exclusive_storage = bool(value) |
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def GetExclusiveStorage(self): |
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"""Get the expected value of the C{exclusive_storage} flag for the cluster.
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"""
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value = self._exclusive_storage
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assert value is not None |
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return value
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def IsTemplateSupported(self, templ): |
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"""Is the given disk template supported by the current configuration?
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"""
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enabled = templ in self.GetEnabledDiskTemplates() |
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return enabled and (not self.GetExclusiveStorage() or |
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templ in constants.DTS_EXCL_STORAGE)
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def AreSpindlesSupported(self): |
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"""Are spindles supported by the current configuration?
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"""
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return self.GetExclusiveStorage() |
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def GetVclusterSettings(self): |
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"""Returns settings for virtual cluster.
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"""
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master = self.get(_VCLUSTER_MASTER_KEY)
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basedir = self.get(_VCLUSTER_BASEDIR_KEY)
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return (master, basedir)
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def GetDiskOptions(self): |
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"""Return options for the disks of the instances.
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Get 'disks' parameter from the configuration data. If 'disks' is missing,
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try to create it from the legacy 'disk' and 'disk-growth' parameters.
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"""
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try:
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return self._data["disks"] |
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except KeyError: |
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pass
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# Legacy interface
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sizes = self._data.get("disk") |
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growths = self._data.get("disk-growth") |
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if sizes or growths: |
452 |
if (sizes is None or growths is None or len(sizes) != len(growths)): |
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raise qa_error.Error("Config options 'disk' and 'disk-growth' must" |
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" exist and have the same number of items")
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disks = [] |
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for (size, growth) in zip(sizes, growths): |
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disks.append({"size": size, "growth": growth}) |
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return disks
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else:
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return None |
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def Load(path): |
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"""Loads the passed configuration file.
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"""
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global _config # pylint: disable=W0603 |
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_config = _QaConfig.Load(path) |
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def GetConfig(): |
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"""Returns the configuration object.
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"""
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if _config is None: |
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raise RuntimeError("Configuration not yet loaded") |
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return _config
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def get(name, default=None): |
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"""Wrapper for L{_QaConfig.get}.
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"""
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return GetConfig().get(name, default=default)
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class Either: |
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def __init__(self, tests): |
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"""Initializes this class.
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@type tests: list or string
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@param tests: List of test names
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@see: L{TestEnabled} for details
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"""
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self.tests = tests
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def _MakeSequence(value): |
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"""Make sequence of single argument.
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If the single argument is not already a list or tuple, a list with the
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argument as a single item is returned.
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"""
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if isinstance(value, (list, tuple)): |
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return value
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else:
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return [value]
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def _TestEnabledInner(check_fn, names, fn): |
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"""Evaluate test conditions.
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@type check_fn: callable
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@param check_fn: Callback to check whether a test is enabled
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@type names: sequence or string
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@param names: Test name(s)
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@type fn: callable
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@param fn: Aggregation function
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@rtype: bool
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@return: Whether test is enabled
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"""
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names = _MakeSequence(names) |
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result = [] |
530 |
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for name in names: |
532 |
if isinstance(name, Either): |
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value = _TestEnabledInner(check_fn, name.tests, compat.any) |
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elif isinstance(name, (list, tuple)): |
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value = _TestEnabledInner(check_fn, name, compat.all) |
536 |
elif callable(name): |
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value = name() |
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else:
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value = check_fn(name) |
540 |
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result.append(value) |
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return fn(result)
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def TestEnabled(tests, _cfg=None): |
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"""Returns True if the given tests are enabled.
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@param tests: A single test as a string, or a list of tests to check; can
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contain L{Either} for OR conditions, AND is default
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"""
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if _cfg is None: |
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cfg = GetConfig() |
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else:
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cfg = _cfg |
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# Get settings for all tests
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cfg_tests = cfg.get("tests", {})
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|
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# Get default setting
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default = cfg_tests.get("default", True) |
563 |
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return _TestEnabledInner(lambda name: cfg_tests.get(name, default), |
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tests, compat.all) |
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|
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|
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def GetInstanceCheckScript(*args): |
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"""Wrapper for L{_QaConfig.GetInstanceCheckScript}.
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|
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"""
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return GetConfig().GetInstanceCheckScript(*args)
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|
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|
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def GetEnabledHypervisors(*args): |
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"""Wrapper for L{_QaConfig.GetEnabledHypervisors}.
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577 |
|
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"""
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return GetConfig().GetEnabledHypervisors(*args)
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|
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|
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def GetDefaultHypervisor(*args): |
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"""Wrapper for L{_QaConfig.GetDefaultHypervisor}.
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|
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"""
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return GetConfig().GetDefaultHypervisor(*args)
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|
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|
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def GetEnabledDiskTemplates(*args): |
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"""Wrapper for L{_QaConfig.GetEnabledDiskTemplates}.
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|
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"""
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return GetConfig().GetEnabledDiskTemplates(*args)
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|
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|
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def GetDefaultDiskTemplate(*args): |
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"""Wrapper for L{_QaConfig.GetDefaultDiskTemplate}.
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|
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"""
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return GetConfig().GetDefaultDiskTemplate(*args)
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601 |
|
602 |
|
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def GetMasterNode(): |
604 |
"""Wrapper for L{_QaConfig.GetMasterNode}.
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605 |
|
606 |
"""
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return GetConfig().GetMasterNode()
|
608 |
|
609 |
|
610 |
def AcquireInstance(_cfg=None): |
611 |
"""Returns an instance which isn't in use.
|
612 |
|
613 |
"""
|
614 |
if _cfg is None: |
615 |
cfg = GetConfig() |
616 |
else:
|
617 |
cfg = _cfg |
618 |
|
619 |
# Filter out unwanted instances
|
620 |
instances = filter(lambda inst: not inst.used, cfg["instances"]) |
621 |
|
622 |
if not instances: |
623 |
raise qa_error.OutOfInstancesError("No instances left") |
624 |
|
625 |
instance = instances[0]
|
626 |
instance.Use() |
627 |
|
628 |
return instance
|
629 |
|
630 |
|
631 |
def SetExclusiveStorage(value): |
632 |
"""Wrapper for L{_QaConfig.SetExclusiveStorage}.
|
633 |
|
634 |
"""
|
635 |
return GetConfig().SetExclusiveStorage(value)
|
636 |
|
637 |
|
638 |
def GetExclusiveStorage(): |
639 |
"""Wrapper for L{_QaConfig.GetExclusiveStorage}.
|
640 |
|
641 |
"""
|
642 |
return GetConfig().GetExclusiveStorage()
|
643 |
|
644 |
|
645 |
def IsTemplateSupported(templ): |
646 |
"""Wrapper for L{_QaConfig.IsTemplateSupported}.
|
647 |
|
648 |
"""
|
649 |
return GetConfig().IsTemplateSupported(templ)
|
650 |
|
651 |
|
652 |
def AreSpindlesSupported(): |
653 |
"""Wrapper for L{_QaConfig.AreSpindlesSupported}.
|
654 |
|
655 |
"""
|
656 |
return GetConfig().AreSpindlesSupported()
|
657 |
|
658 |
|
659 |
def _NodeSortKey(node): |
660 |
"""Returns sort key for a node.
|
661 |
|
662 |
@type node: L{_QaNode}
|
663 |
|
664 |
"""
|
665 |
return (node.use_count, utils.NiceSortKey(node.primary))
|
666 |
|
667 |
|
668 |
def AcquireNode(exclude=None, _cfg=None): |
669 |
"""Returns the least used node.
|
670 |
|
671 |
"""
|
672 |
if _cfg is None: |
673 |
cfg = GetConfig() |
674 |
else:
|
675 |
cfg = _cfg |
676 |
|
677 |
master = cfg.GetMasterNode() |
678 |
|
679 |
# Filter out unwanted nodes
|
680 |
# TODO: Maybe combine filters
|
681 |
if exclude is None: |
682 |
nodes = cfg["nodes"][:]
|
683 |
elif isinstance(exclude, (list, tuple)): |
684 |
nodes = filter(lambda node: node not in exclude, cfg["nodes"]) |
685 |
else:
|
686 |
nodes = filter(lambda node: node != exclude, cfg["nodes"]) |
687 |
|
688 |
nodes = filter(lambda node: node.added or node == master, nodes) |
689 |
|
690 |
if not nodes: |
691 |
raise qa_error.OutOfNodesError("No nodes left") |
692 |
|
693 |
# Return node with least number of uses
|
694 |
return sorted(nodes, key=_NodeSortKey)[0].Use() |
695 |
|
696 |
|
697 |
def AcquireManyNodes(num, exclude=None): |
698 |
"""Return the least used nodes.
|
699 |
|
700 |
@type num: int
|
701 |
@param num: Number of nodes; can be 0.
|
702 |
@type exclude: list of nodes or C{None}
|
703 |
@param exclude: nodes to be excluded from the choice
|
704 |
@rtype: list of nodes
|
705 |
@return: C{num} different nodes
|
706 |
|
707 |
"""
|
708 |
nodes = [] |
709 |
if exclude is None: |
710 |
exclude = [] |
711 |
elif isinstance(exclude, (list, tuple)): |
712 |
# Don't modify the incoming argument
|
713 |
exclude = list(exclude)
|
714 |
else:
|
715 |
exclude = [exclude] |
716 |
|
717 |
try:
|
718 |
for _ in range(0, num): |
719 |
n = AcquireNode(exclude=exclude) |
720 |
nodes.append(n) |
721 |
exclude.append(n) |
722 |
except qa_error.OutOfNodesError:
|
723 |
ReleaseManyNodes(nodes) |
724 |
raise
|
725 |
return nodes
|
726 |
|
727 |
|
728 |
def ReleaseManyNodes(nodes): |
729 |
for node in nodes: |
730 |
node.Release() |
731 |
|
732 |
|
733 |
def GetVclusterSettings(): |
734 |
"""Wrapper for L{_QaConfig.GetVclusterSettings}.
|
735 |
|
736 |
"""
|
737 |
return GetConfig().GetVclusterSettings()
|
738 |
|
739 |
|
740 |
def UseVirtualCluster(_cfg=None): |
741 |
"""Returns whether a virtual cluster is used.
|
742 |
|
743 |
@rtype: bool
|
744 |
|
745 |
"""
|
746 |
if _cfg is None: |
747 |
cfg = GetConfig() |
748 |
else:
|
749 |
cfg = _cfg |
750 |
|
751 |
(master, _) = cfg.GetVclusterSettings() |
752 |
|
753 |
return bool(master) |
754 |
|
755 |
|
756 |
@ht.WithDesc("No virtual cluster") |
757 |
def NoVirtualCluster(): |
758 |
"""Used to disable tests for virtual clusters.
|
759 |
|
760 |
"""
|
761 |
return not UseVirtualCluster() |
762 |
|
763 |
|
764 |
def GetDiskOptions(): |
765 |
"""Wrapper for L{_QaConfig.GetDiskOptions}.
|
766 |
|
767 |
"""
|
768 |
return GetConfig().GetDiskOptions()
|