root / lib / hypervisor / hv_base.py @ f48148c3
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#
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# Copyright (C) 2006, 2007, 2008 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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"""Base class for all hypervisors
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"""
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from ganeti import errors |
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class BaseHypervisor(object): |
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"""Abstract virtualisation technology interface
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The goal is that all aspects of the virtualisation technology are
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abstracted away from the rest of code.
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"""
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PARAMETERS = [] |
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def __init__(self): |
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pass
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def StartInstance(self, instance, block_devices, extra_args): |
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"""Start an instance."""
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raise NotImplementedError |
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def StopInstance(self, instance, force=False): |
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"""Stop an instance."""
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raise NotImplementedError |
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def RebootInstance(self, instance): |
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"""Reboot an instance."""
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raise NotImplementedError |
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def ListInstances(self): |
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"""Get the list of running instances."""
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raise NotImplementedError |
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def GetInstanceInfo(self, instance_name): |
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"""Get instance properties.
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Args:
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instance_name: the instance name
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Returns:
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(name, id, memory, vcpus, state, times)
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"""
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raise NotImplementedError |
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def GetAllInstancesInfo(self): |
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"""Get properties of all instances.
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Returns:
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[(name, id, memory, vcpus, stat, times),...]
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"""
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raise NotImplementedError |
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def GetNodeInfo(self): |
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"""Return information about the node.
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The return value is a dict, which has to have the following items:
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(all values in MiB)
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- memory_total: the total memory size on the node
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- memory_free: the available memory on the node for instances
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- memory_dom0: the memory used by the node itself, if available
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"""
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raise NotImplementedError |
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@staticmethod
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def GetShellCommandForConsole(instance): |
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"""Return a command for connecting to the console of an instance.
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"""
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raise NotImplementedError |
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def Verify(self): |
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"""Verify the hypervisor.
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"""
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raise NotImplementedError |
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def MigrateInstance(self, name, target, live): |
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"""Migrate an instance.
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Arguments:
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- name: the name of the instance
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- target: the target of the migration (usually will be IP and not name)
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- live: whether to do live migration or not
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Returns: none, errors will be signaled by exception.
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"""
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raise NotImplementedError |
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@classmethod
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def CheckParameterSyntax(cls, hvparams): |
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"""Check the given parameters for validity.
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This should check the passed set of parameters for
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validity. Classes should extend, not replace, this function.
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@type hvparams: dict
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@param hvparams: dictionary with parameter names/value
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@raise errors.HypervisorError: when a parameter is not valid
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"""
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for key in hvparams: |
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if key not in cls.PARAMETERS: |
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raise errors.HypervisorError("Hypervisor parameter '%s'" |
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" not supported" % key)
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for key in cls.PARAMETERS: |
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if key not in hvparams: |
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raise errors.HypervisorError("Hypervisor parameter '%s'" |
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" missing" % key)
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def ValidateParameters(self, hvparams): |
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"""Check the given parameters for validity.
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This should check the passed set of parameters for
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validity. Classes should extend, not replace, this function.
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@type hvparams: dict
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@param hvparams: dictionary with parameter names/value
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@raise errors.HypervisorError: when a parameter is not valid
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"""
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pass
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