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)]