def schedule_run_instance(self, context, instance_id, *_args, **_kwargs):
"""Picks a host that is up and has the fewest running instances."""
instance_ref = db.instance_get(context, instance_id)
if (instance_ref['availability_zone']
and ':' in instance_ref['availability_zone']
and context.is_admin):
zone, _x, host = instance_ref['availability_zone'].partition(':')
service = db.service_get_by_args(context.elevated(), host,
'nova-compute')
if not self.service_is_up(service):
raise driver.WillNotSchedule(_("Host %s is not alive") % host)
# TODO(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.instance_update(context, instance_id, {
'host': host,
'scheduled_at': now
})
return host
results = db.service_get_all_compute_sorted(context)
for result in results:
(service, instance_cores) = result
compute_ref = db.service_get_all_compute_by_host(
context, service['host'])[0]
compute_node_ref = compute_ref['compute_node'][0]
if (instance_ref['vcpus'] + instance_cores >
compute_node_ref['vcpus'] * FLAGS.max_cores):
raise driver.NoValidHost(_("All hosts have too many cores"))
LOG.debug(
_("requested instance cores = %s + used compute node cores = %s < total compute node cores = %s * max cores = %s"
) % (instance_ref['vcpus'], instance_cores,
compute_node_ref['vcpus'], FLAGS.max_cores))
if self.service_is_up(service):
# NOTE(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.instance_update(context, instance_id, {
'host': service['host'],
'scheduled_at': now
})
LOG.debug(
_("instance = %s scheduled to host = %s") %
(instance_id, service['host']))
return service['host']
raise driver.NoValidHost(
_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
def schedule_run_instance(self, context, instance_id, *_args, **_kwargs):
"""Picks a host that is up and has the fewest running instances."""
instance_ref = db.instance_get(context, instance_id)
if (instance_ref['availability_zone']
and ':' in instance_ref['availability_zone']
and context.is_admin):
zone, _x, host = instance_ref['availability_zone'].partition(':')
service = db.service_get_by_args(context.elevated(), host,
'nova-compute')
if not self.service_is_up(service):
raise driver.WillNotSchedule(_("Host %s is not alive") % host)
# TODO(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.instance_update(context, instance_id, {
'host': host,
'scheduled_at': now
})
return host
results = db.service_get_all_compute_sorted(context)
for result in results:
(service, instance_cores) = result
if instance_cores + instance_ref['vcpus'] > FLAGS.max_cores:
raise driver.NoValidHost(_("All hosts have too many cores"))
if self.service_is_up(service):
# NOTE(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.instance_update(context, instance_id, {
'host': service['host'],
'scheduled_at': now
})
return service['host']
raise driver.NoValidHost(_("No hosts found"))
def schedule_create_volume(self, context, volume_id, *_args, **_kwargs):
"""Picks a host that is up and has the fewest volumes."""
volume_ref = db.volume_get(context, volume_id)
if (volume_ref['availability_zone']
and ':' in volume_ref['availability_zone']
and context.is_admin):
zone, _x, host = volume_ref['availability_zone'].partition(':')
service = db.service_get_by_args(context.elevated(), host,
'nova-volume')
if not self.service_is_up(service):
raise driver.WillNotSchedule(_("Host %s not available") % host)
# TODO(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.volume_update(context, volume_id, {
'host': host,
'scheduled_at': now
})
return host
results = db.service_get_all_volume_sorted(context)
for result in results:
(service, volume_gigabytes) = result
compute_ref = db.service_get_all_compute_by_host(
context, service['host'])[0]
compute_node_ref = compute_ref['compute_node'][0]
if volume_ref['size'] + volume_gigabytes > compute_node_ref[
'local_gb']:
raise driver.NoValidHost(
_("All hosts have too many "
"gigabytes"))
LOG.debug(
_("requested volume GBs = %s + used compute node GBs = %s < total compute node GBs = %s"
) % (volume_ref['size'], volume_gigabytes,
compute_node_ref['local_gb']))
if self.service_is_up(service):
# NOTE(vish): this probably belongs in the manager, if we
# can generalize this somehow
now = datetime.datetime.utcnow()
db.volume_update(context, volume_id, {
'host': service['host'],
'scheduled_at': now
})
LOG.debug(
_("volume = %s scheduled to host = %s") %
(volume_id, service['host']))
return service['host']
raise driver.NoValidHost(
_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
def schedule_set_network_host(self, context, *_args, **_kwargs):
"""Picks a host that is up and has the fewest networks."""
results = db.service_get_all_network_sorted(context)
for result in results:
(service, instance_count) = result
if instance_count >= FLAGS.max_networks:
raise driver.NoValidHost(_("All hosts have too many networks"))
if self.service_is_up(service):
return service['host']
raise driver.NoValidHost(_("No hosts found"))
def schedule_set_network_host(self, context, *_args, **_kwargs):
"""Picks a host that is up and has the fewest networks."""
results = db.service_get_all_network_sorted(context)
for result in results:
(service, instance_count) = result
if instance_count >= FLAGS.max_networks:
raise driver.NoValidHost(_("All hosts have too many networks"))
if self.service_is_up(service):
return service['host']
raise driver.NoValidHost(_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
def schedule(self, context, topic, *args, **kwargs):
"""Gets the host name from the Quantum service"""
instance_id = kwargs['instance_id']
user_id = \
kwargs['request_spec']['instance_properties']['user_id']
project_id = \
kwargs['request_spec']['instance_properties']['project_id']
instance_data_dict = \
{'novatenant': \
{'instance_id': instance_id,
'instance_desc': \
{'user_id': user_id,
'project_id': project_id}}}
client = Client(HOST,
PORT,
USE_SSL,
format='json',
tenant=TENANT_ID,
action_prefix=ACTION_PREFIX_CSCO)
request_url = "/novatenants/" + project_id + ACTION
data = client.do_request('PUT', request_url, body=instance_data_dict)
hostname = data["host_list"]["host_1"]
if not hostname:
raise driver.NoValidHost(
_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
LOG.debug(_("Quantum service returned host: %s") % hostname)
return hostname
def schedule(self, context, topic, *_args, **_kwargs):
"""Picks a host that is up at random."""
hosts = self.hosts_up(context, topic)
if not hosts:
raise driver.NoValidHost(_("No hosts found"))
return hosts[int(random.random() * len(hosts))]
def schedule(self, context, topic, request_spec, *args, **kwargs):
"""The schedule() contract requires we return the one
best-suited host for this request.
"""
# TODO(sandy): We're only focused on compute instances right now,
# so we don't implement the default "schedule()" method required
# of Schedulers.
msg = _("No host selection for %s defined." % topic)
raise driver.NoValidHost(msg)
def schedule(self, context, topic, *_args, **_kwargs):
"""Picks a host that is up at random in selected
availability zone (if defined).
"""
zone = _kwargs.get('availability_zone')
hosts = self.hosts_up_with_zone(context, topic, zone)
if not hosts:
raise driver.NoValidHost(_("No hosts found"))
return hosts[int(random.random() * len(hosts))]
def schedule(self, context, topic, *_args, **_kwargs):
"""Picks a host that is up at random."""
hosts = self.hosts_up(context, topic)
if not hosts:
raise driver.NoValidHost(
_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
return hosts[int(random.random() * len(hosts))]
def schedule(self, context, topic, *_args, **_kwargs):
"""Picks a host that is up at random in selected
availability zone (if defined).
"""
zone = _kwargs.get('availability_zone')
hosts = self.hosts_up_with_zone(context, topic, zone)
if not hosts:
raise driver.NoValidHost(
_("Scheduler was unable to locate a host"
" for this request. Is the appropriate"
" service running?"))
return hosts[int(random.random() * len(hosts))]
def schedule_run_instance(self, context, instance_id, request_spec, *args,
**kwargs):
"""This method is called from nova.compute.api to provision
an instance. However we need to look at the parameters being
passed in to see if this is a request to:
1. Create a Build Plan and then provision, or
2. Use the Build Plan information in the request parameters
to simply create the instance (either in this zone or
a child zone).
"""
# TODO(sandy): We'll have to look for richer specs at some point.
blob = request_spec.get('blob')
if blob:
self._provision_resource(context, request_spec, instance_id,
request_spec, kwargs)
return None
num_instances = request_spec.get('num_instances', 1)
LOG.debug(
_("Attempting to build %(num_instances)d instance(s)") % locals())
# Create build plan and provision ...
build_plan = self.select(context, request_spec)
if not build_plan:
raise driver.NoValidHost(_('No hosts were available'))
for num in xrange(num_instances):
if not build_plan:
break
build_plan_item = build_plan.pop(0)
self._provision_resource(context, build_plan_item, instance_id,
request_spec, kwargs)
# Returning None short-circuits the routing to Compute (since
# we've already done it here)
return None
def schedule(self, context, topic, request_spec, *args, **kwargs):
"""The schedule() contract requires we return the one
best-suited host for this request.
"""
raise driver.NoValidHost(_('No hosts were available'))
