def _create_cluster_instances(
cls, context, cluster_id, cluster_name,
datastore, datastore_version, instances, extended_properties,
locality):
LOG.debug("Processing a request for new cluster instances.")
cassandra_conf = CONF.get(datastore_version.manager)
eph_enabled = cassandra_conf.device_path
vol_enabled = cassandra_conf.volume_support
# Validate instance flavors.
models.validate_instance_flavors(context, instances,
vol_enabled, eph_enabled)
# Compute the total volume allocation.
req_volume_size = models.get_required_volume_size(instances,
vol_enabled)
# Check requirements against quota.
num_new_instances = len(instances)
deltas = {'instances': num_new_instances, 'volumes': req_volume_size}
check_quotas(context.tenant, deltas)
# Creating member instances.
num_instances = len(
CassandraClusterTasks.find_cluster_node_ids(cluster_id))
new_instances = []
for instance_idx, instance in enumerate(instances, num_instances + 1):
instance_az = instance.get('availability_zone', None)
member_config = {"id": cluster_id,
"instance_type": "member",
"dc": cls.DEFAULT_DATA_CENTER,
"rack": instance_az or cls.DEFAULT_RACK}
instance_name = instance.get('name')
if not instance_name:
instance_name = cls._build_instance_name(
cluster_name, member_config['dc'], member_config['rack'],
instance_idx)
new_instance = inst_models.Instance.create(
context, instance_name,
instance['flavor_id'],
datastore_version.image_id,
[], [],
datastore, datastore_version,
instance['volume_size'], None,
nics=instance.get('nics', None),
availability_zone=instance_az,
configuration_id=None,
cluster_config=member_config,
modules=instance.get('modules'),
region_name=instance.get('region_name'),
locality=locality)
new_instances.append(new_instance)
return new_instances
def test_choose_seed_nodes(self):
nodes = self._build_mock_nodes(3)
seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
self.assertEqual(1, len(seeds),
"Only one seed node should be selected for a "
"single-rack-single-dc cluster.")
nodes = self._build_mock_nodes(3)
nodes[0]['rack'] = 'rack1'
nodes[1]['rack'] = 'rack2'
seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
self.assertEqual(2, len(seeds),
"There should be exactly two seed nodes. "
"One from each rack.")
nodes = self._build_mock_nodes(3)
nodes[0]['rack'] = 'rack1'
nodes[1]['rack'] = 'rack2'
nodes[2]['dc'] = 'dc2'
seeds = CassandraClusterTasks.choose_seed_nodes(nodes)
self.assertEqual(3, len(seeds),
"There should be exactly three seed nodes. "
"One from each rack and data center.")
def _create_cluster_instances(cls, context, cluster_id, cluster_name,
datastore, datastore_version, instances,
extended_properties, locality):
LOG.debug("Processing a request for new cluster instances.")
cassandra_conf = CONF.get(datastore_version.manager)
eph_enabled = cassandra_conf.device_path
vol_enabled = cassandra_conf.volume_support
# Validate instance flavors.
models.validate_instance_flavors(context, instances, vol_enabled,
eph_enabled)
# Compute the total volume allocation.
req_volume_size = models.get_required_volume_size(
instances, vol_enabled)
# Check requirements against quota.
num_new_instances = len(instances)
deltas = {'instances': num_new_instances, 'volumes': req_volume_size}
check_quotas(context.tenant, deltas)
# Creating member instances.
num_instances = len(
CassandraClusterTasks.find_cluster_node_ids(cluster_id))
new_instances = []
for instance_idx, instance in enumerate(instances, num_instances + 1):
instance_az = instance.get('availability_zone', None)
member_config = {
"id": cluster_id,
"instance_type": "member",
"dc": cls.DEFAULT_DATA_CENTER,
"rack": instance_az or cls.DEFAULT_RACK
}
instance_name = instance.get('name')
if not instance_name:
instance_name = cls._build_instance_name(
cluster_name, member_config['dc'], member_config['rack'],
instance_idx)
new_instance = inst_models.Instance.create(
context,
instance_name,
instance['flavor_id'],
datastore_version.image_id, [], [],
datastore,
datastore_version,
instance['volume_size'],
None,
nics=instance.get('nics', None),
availability_zone=instance_az,
configuration_id=None,
cluster_config=member_config,
modules=instance.get('modules'),
region_name=instance.get('region_name'),
locality=locality)
new_instances.append(new_instance)
return new_instances
