def indicate(self, context):
cpu_threshold = CONF.loadbalancer_standart_deviation.threshold_cpu
mem_threshold = CONF.loadbalancer_standart_deviation.threshold_memory
compute_nodes = db.get_compute_node_stats(context)
instances = []
# TODO: Make only one query that returns all instances placed on active
# hosts.
for node in compute_nodes:
node_instances = db.get_instances_stat(context,
node['hypervisor_hostname'])
instances.extend(node_instances)
compute_stats = utils.fill_compute_stats(instances, compute_nodes)
host_loads = utils.calculate_host_loads(compute_nodes, compute_stats)
LOG.debug(_(host_loads))
ram_sd = utils.calculate_sd(host_loads, 'mem')
cpu_sd = utils.calculate_sd(host_loads, 'cpu')
if cpu_sd > cpu_threshold or ram_sd > mem_threshold:
extra_info = {'cpu_overload': False}
if cpu_sd > cpu_threshold:
overloaded_host = sorted(host_loads,
key=lambda x: host_loads[x]['cpu'],
reverse=True)[0]
extra_info['cpu_overload'] = True
else:
overloaded_host = sorted(host_loads,
key=lambda x: host_loads[x]['mem'],
reverse=True)[0]
host = filter(
lambda x: x['hypervisor_hostname'] == overloaded_host,
compute_nodes)[0]
LOG.debug(_(host))
return host, compute_nodes, extra_info
return [], [], {}
def indicate(self, context):
cpu_threshold = CONF.loadbalancer_standart_deviation.threshold_cpu
mem_threshold = CONF.loadbalancer_standart_deviation.threshold_memory
compute_nodes = db.get_compute_node_stats(context)
instances = []
# TODO: Make only one query that returns all instances placed on active
# hosts.
for node in compute_nodes:
node_instances = db.get_instances_stat(
context,
node['hypervisor_hostname'])
instances.extend(node_instances)
compute_stats = utils.fill_compute_stats(instances, compute_nodes)
host_loads = utils.calculate_host_loads(compute_nodes, compute_stats)
LOG.debug(_(host_loads))
ram_sd = utils.calculate_sd(host_loads, 'mem')
cpu_sd = utils.calculate_sd(host_loads, 'cpu')
if cpu_sd > cpu_threshold or ram_sd > mem_threshold:
extra_info = {'cpu_overload': False}
if cpu_sd > cpu_threshold:
overloaded_host = sorted(host_loads,
key=lambda x: host_loads[x]['cpu'],
reverse=True)[0]
extra_info['cpu_overload'] = True
else:
overloaded_host = sorted(host_loads,
key=lambda x: host_loads[x]['mem'],
reverse=True)[0]
host = filter(
lambda x:
x['hypervisor_hostname'] == overloaded_host, compute_nodes)[0]
LOG.debug(_(host))
return host, compute_nodes, extra_info
return [], [], {}
def min_sd(self, context, **kwargs):
compute_nodes = kwargs.get('nodes')
instances = []
for node in compute_nodes:
node_instances = db.get_instances_stat(context,
node['hypervisor_hostname'])
instances.extend(node_instances)
host_loads = lb_utils.fill_compute_stats(instances, compute_nodes)
LOG.debug(_(host_loads))
vm_host_map = []
for instance in instances:
for node in compute_nodes:
h_hostname = node['hypervisor_hostname']
# Source host shouldn't be use.
if instance.instance['host'] != h_hostname:
sd = self._simulate_migration(instance, node, host_loads,
compute_nodes)
vm_host_map.append({
'host': h_hostname,
'vm': instance['instance_uuid'],
'sd': sd
})
vm_host_map = sorted(vm_host_map, key=lambda x: x['sd']['total_sd'])
LOG.debug(_(vm_host_map))
for vm_host in vm_host_map:
instance = filter(lambda x: x['instance_uuid'] == vm_host['vm'],
instances)[0]
instance_resources = lb_utils.get_instance_resources(instance)
if instance_resources:
filter_instance = {
'uuid': instance['instance_uuid'],
'resources': instance_resources
}
filtered = self.filter_hosts(context,
filter_instance,
compute_nodes,
host=vm_host['host'])
if not filtered[0]:
continue
self.migrate(context, instance['instance_uuid'],
vm_host['host'])
return
def min_sd(self, context, **kwargs):
compute_nodes = kwargs.get('nodes')
instances = []
for node in compute_nodes:
node_instances = db.get_instances_stat(
context,
node['hypervisor_hostname'])
instances.extend(node_instances)
host_loads = lb_utils.fill_compute_stats(instances, compute_nodes)
LOG.debug(_(host_loads))
vm_host_map = []
for instance in instances:
for node in compute_nodes:
h_hostname = node['hypervisor_hostname']
# Source host shouldn't be use.
if instance.instance['host'] != h_hostname:
sd = self._simulate_migration(instance, node, host_loads,
compute_nodes)
vm_host_map.append({'host': h_hostname,
'vm': instance['instance_uuid'],
'sd': sd})
vm_host_map = sorted(vm_host_map, key=lambda x: x['sd']['total_sd'])
LOG.debug(_(vm_host_map))
for vm_host in vm_host_map:
instance = filter(lambda x: x['instance_uuid'] == vm_host['vm'],
instances)[0]
instance_resources = lb_utils.get_instance_resources(instance)
if instance_resources:
filter_instance = {'uuid': instance['instance_uuid'],
'resources': instance_resources}
filtered = self.filter_hosts(context, filter_instance,
compute_nodes,
host=vm_host['host'])
if not filtered[0]:
continue
self.migrate(context, instance['instance_uuid'],
vm_host['host'])
return