47 lines
2.2 KiB
Python
47 lines
2.2 KiB
Python
# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# Copyright 2011 Justin Santa Barbara
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# All Rights Reserved.
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# Copyright (c) 2010 Citrix Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Power state is the state we get by calling virt driver on a particular
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domain. The hypervisor is always considered the authority on the status
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of a particular VM, and the power_state in the DB should be viewed as a
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snapshot of the VMs's state in the (recent) past. It can be periodically
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updated, and should also be updated at the end of a task if the task is
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supposed to affect power_state.
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"""
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from nova.objects import fields
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# NOTE(maoy): These are *not* virDomainState values from libvirt.
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# The hex value happens to match virDomainState for backward-compatibility
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# reasons.
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NOSTATE = fields.InstancePowerState.index(fields.InstancePowerState.NOSTATE)
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RUNNING = fields.InstancePowerState.index(fields.InstancePowerState.RUNNING)
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PAUSED = fields.InstancePowerState.index(fields.InstancePowerState.PAUSED)
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# the VM is powered off
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SHUTDOWN = fields.InstancePowerState.index(fields.InstancePowerState.SHUTDOWN)
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CRASHED = fields.InstancePowerState.index(fields.InstancePowerState.CRASHED)
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SUSPENDED = fields.InstancePowerState.index(
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fields.InstancePowerState.SUSPENDED)
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# TODO(justinsb): Power state really needs to be a proper class,
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# so that we're not locked into the libvirt status codes and can put mapping
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# logic here rather than spread throughout the code
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STATE_MAP = {fields.InstancePowerState.index(state): state
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for state in fields.InstancePowerState.ALL
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if state != fields.InstancePowerState._UNUSED}
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