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OpenStack Study: baremetal_host_manager.py**** CubicPower OpenStack Study ****
# Copyright (c) 2012 NTT DOCOMO, INC. # Copyright (c) 2011 OpenStack Foundation # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. """ Manage hosts in the current zone. """ from nova.scheduler import host_manager
**** CubicPower OpenStack Study **** class BaremetalNodeState(host_manager.HostState): """Mutable and immutable information tracked for a host. This is an attempt to remove the ad-hoc data structures previously used and lock down access. """
**** CubicPower OpenStack Study **** def update_from_compute_node(self, compute): """Update information about a host from its compute_node info.""" all_ram_mb = compute['memory_mb'] free_disk_mb = compute['free_disk_gb'] * 1024 free_ram_mb = compute['free_ram_mb'] self.free_ram_mb = free_ram_mb self.total_usable_ram_mb = all_ram_mb self.free_disk_mb = free_disk_mb self.vcpus_total = compute['vcpus'] self.vcpus_used = compute['vcpus_used']
**** CubicPower OpenStack Study **** def consume_from_instance(self, instance): self.free_ram_mb = 0 self.free_disk_mb = 0 self.vcpus_used = self.vcpus_total def new_host_state(self, host, node, capabilities=None, service=None): """Returns an instance of BaremetalHostState or HostState according to capabilities. If 'baremetal_driver' is in capabilities, it returns an instance of BaremetalHostState. If not, returns an instance of HostState. """ if capabilities is None: capabilities = {} cap = capabilities.get('compute', {}) if bool(cap.get('baremetal_driver')): return BaremetalNodeState(host, node, capabilities, service) else: return host_manager.HostState(host, node, capabilities, service)
**** CubicPower OpenStack Study **** def new_host_state(self, host, node, capabilities=None, service=None): """Returns an instance of BaremetalHostState or HostState according to capabilities. If 'baremetal_driver' is in capabilities, it returns an instance of BaremetalHostState. If not, returns an instance of HostState. """ if capabilities is None: capabilities = {} cap = capabilities.get('compute', {}) if bool(cap.get('baremetal_driver')): return BaremetalNodeState(host, node, capabilities, service) else: return host_manager.HostState(host, node, capabilities, service)
**** CubicPower OpenStack Study **** class BaremetalHostManager(host_manager.HostManager): """Bare-Metal HostManager class.""" # Override. # Yes, this is not a class, and it is OK host_state_cls = new_host_state
**** CubicPower OpenStack Study **** def __init__(self): super(BaremetalHostManager, self).__init__()
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