72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
# Copyright (c) 2012 NTT DOCOMO, INC.
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# Copyright (c) 2011 OpenStack Foundation
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# All Rights Reserved.
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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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"""
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Manage hosts in the current zone.
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"""
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from nova.scheduler import host_manager
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class BaremetalNodeState(host_manager.HostState):
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"""Mutable and immutable information tracked for a host.
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This is an attempt to remove the ad-hoc data structures
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previously used and lock down access.
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"""
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def update_from_compute_node(self, compute):
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"""Update information about a host from its compute_node info."""
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all_ram_mb = compute['memory_mb']
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free_disk_mb = compute['free_disk_gb'] * 1024
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free_ram_mb = compute['free_ram_mb']
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self.free_ram_mb = free_ram_mb
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self.total_usable_ram_mb = all_ram_mb
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self.free_disk_mb = free_disk_mb
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self.vcpus_total = compute['vcpus']
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self.vcpus_used = compute['vcpus_used']
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def consume_from_instance(self, instance):
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self.free_ram_mb = 0
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self.free_disk_mb = 0
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self.vcpus_used = self.vcpus_total
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def new_host_state(self, host, node, capabilities=None, service=None):
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"""Returns an instance of BaremetalHostState or HostState according to
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capabilities. If 'baremetal_driver' is in capabilities, it returns an
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instance of BaremetalHostState. If not, returns an instance of HostState.
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"""
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if capabilities is None:
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capabilities = {}
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cap = capabilities.get('compute', {})
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if bool(cap.get('baremetal_driver')):
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return BaremetalNodeState(host, node, capabilities, service)
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else:
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return host_manager.HostState(host, node, capabilities, service)
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class BaremetalHostManager(host_manager.HostManager):
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"""Bare-Metal HostManager class."""
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# Override.
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# Yes, this is not a class, and it is OK
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host_state_cls = new_host_state
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def __init__(self):
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super(BaremetalHostManager, self).__init__()
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