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# Copyright (c) 2014 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.
"""
Ironic host manager.
This host manager will consume all cpu's, disk space, and
ram from a host / node as it is supporting Baremetal hosts, which can not be
subdivided into multiple instances.
"""
from oslo.config import cfg
from nova.openstack.common import log as logging
from nova.scheduler import host_manager
host_manager_opts = [
cfg.ListOpt('baremetal_scheduler_default_filters',
default=[
'RetryFilter',
'AvailabilityZoneFilter',
'ComputeFilter',
'ComputeCapabilitiesFilter',
'ImagePropertiesFilter',
'ExactRamFilter',
'ExactDiskFilter',
'ExactCoreFilter',
],
help='Which filter class names to use for filtering '
'baremetal hosts when not specified in the request.'),
cfg.BoolOpt('scheduler_use_baremetal_filters',
default=False,
help='Flag to decide whether to use '
'baremetal_scheduler_default_filters or not.'),
]
CONF = cfg.CONF
CONF.register_opts(host_manager_opts)
LOG = logging.getLogger(__name__)
class IronicNodeState(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.
"""
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']
def consume_from_instance(self, instance):
"""Consume nodes entire resources regardless of instance request."""
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 IronicNodeState or HostState according to
capabilities. If 'ironic_driver' is in capabilities, it returns an
instance of IronicHostState. If not, returns an instance of HostState.
"""
if capabilities is None:
capabilities = {}
cap = capabilities.get('compute', {})
if bool(cap.get('ironic_driver')):
return IronicNodeState(host, node, capabilities, service)
else:
return host_manager.HostState(host, node, capabilities, service)
class IronicHostManager(host_manager.HostManager):
"""Ironic HostManager class."""
# Override.
# Yes, this is not a class, and it is OK
host_state_cls = new_host_state
def __init__(self):
super(IronicHostManager, self).__init__()
if CONF.scheduler_use_baremetal_filters:
baremetal_default = CONF.baremetal_scheduler_default_filters
CONF.scheduler_default_filters = baremetal_default
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