def get_all_host_states(self, context):
"""Returns a dict of all the hosts the HostManager
knows about. Also, each of the consumable resources in HostState
are pre-populated and adjusted based on data in the db.
For example:
{'192.168.1.100': HostState(), ...}
"""
# Get resource usage across the available volume nodes:
topic = FLAGS.volume_topic
volume_services = db.service_get_all_by_topic(context, topic)
for service in volume_services:
if not utils.service_is_up(service) or service['disabled']:
LOG.warn(_("service is down or disabled."))
continue
host = service['host']
capabilities = self.service_states.get(host, None)
host_state = self.host_state_map.get(host)
if host_state:
# copy capabilities to host_state.capabilities
host_state.update_capabilities(capabilities,
dict(service.iteritems()))
else:
host_state = self.host_state_cls(host,
capabilities=capabilities,
service=
dict(service.iteritems()))
self.host_state_map[host] = host_state
# update host_state
host_state.update_from_volume_capability(capabilities)
return self.host_state_map.itervalues()
def get_all_host_states(self, context):
"""Returns a dict of all the hosts the HostManager
knows about. Also, each of the consumable resources in HostState
are pre-populated and adjusted based on data in the db.
For example:
{'192.168.1.100': HostState(), ...}
"""
# Get resource usage across the available volume nodes:
topic = FLAGS.volume_topic
volume_services = db.service_get_all_by_topic(context, topic)
for service in volume_services:
if not utils.service_is_up(service) or service['disabled']:
LOG.warn(_("service is down or disabled."))
continue
host = service['host']
capabilities = self.service_states.get(host, None)
host_state = self.host_state_map.get(host)
if host_state:
# copy capabilities to host_state.capabilities
host_state.update_capabilities(capabilities,
dict(service.iteritems()))
else:
host_state = self.host_state_cls(host,
capabilities=capabilities,
service=dict(
service.iteritems()))
self.host_state_map[host] = host_state
# update host_state
host_state.update_from_volume_capability(capabilities)
return self.host_state_map.itervalues()
def hosts_up(self, context, topic):
"""Return the list of hosts that have a running service for topic."""
services = db.service_get_all_by_topic(context, topic)
return [service['host']
for service in services
if utils.service_is_up(service)]
def schedule_create_volume(self, context, request_spec, filter_properties):
"""Picks a host that is up and has the fewest volumes."""
elevated = context.elevated()
volume_id = request_spec.get('volume_id')
snapshot_id = request_spec.get('snapshot_id')
image_id = request_spec.get('image_id')
volume_properties = request_spec.get('volume_properties')
volume_size = volume_properties.get('size')
availability_zone = volume_properties.get('availability_zone')
zone, host = None, None
if availability_zone:
zone, _x, host = availability_zone.partition(':')
if host and context.is_admin:
topic = FLAGS.volume_topic
service = db.service_get_by_args(elevated, host, topic)
if not utils.service_is_up(service):
raise exception.WillNotSchedule(host=host)
updated_volume = driver.volume_update_db(context, volume_id, host)
self.volume_rpcapi.create_volume(context,
updated_volume,
host,
snapshot_id,
image_id)
return None
results = db.service_get_all_volume_sorted(elevated)
if zone:
results = [(service, gigs) for (service, gigs) in results
if service['availability_zone'] == zone]
for result in results:
(service, volume_gigabytes) = result
if volume_gigabytes + volume_size > FLAGS.max_gigabytes:
msg = _("Not enough allocatable volume gigabytes remaining")
raise exception.NoValidHost(reason=msg)
if utils.service_is_up(service) and not service['disabled']:
updated_volume = driver.volume_update_db(context, volume_id,
service['host'])
self.volume_rpcapi.create_volume(context,
updated_volume,
service['host'],
snapshot_id,
image_id)
return None
msg = _("Is the appropriate service running?")
raise exception.NoValidHost(reason=msg)