def get_template_definition(cls, server_type, os, coe):
'''Get enabled TemplateDefinitions.
Returns the enabled TemplateDefinition class for the provided
cluster_type.
With the following classes:
class TemplateDefinition1(TemplateDefinition):
provides = [
('server_type1', 'os1', 'coe1')
]
class TemplateDefinition2(TemplateDefinition):
provides = [
('server_type2', 'os2', 'coe2')
]
And the following entry_points:
magnum.template_definitions =
template_name_1 = some.python.path:TemplateDefinition1
template_name_2 = some.python.path:TemplateDefinition2
get_template_name_1_definition('server_type2', 'os2', 'coe2')
will return: TemplateDefinition2
:param server_type: The server_type the cluster definition
will build on
:param os: The operating system the cluster definition will build on
:param coe: The Container Orchestration Environment the cluster will
produce
:return: class
'''
definition_map = cls.get_template_definitions()
cluster_type = (server_type, os, coe)
if cluster_type not in definition_map:
raise exception.ClusterTypeNotSupported(server_type=server_type,
os=os,
coe=coe)
type_definitions = definition_map[cluster_type]
for name in cfg.CONF.cluster.enabled_definitions:
if name in type_definitions:
return type_definitions[name]()
raise exception.ClusterTypeNotEnabled(server_type=server_type,
os=os,
coe=coe)
def get_driver(cls, server_type, os, coe):
"""Get Driver.
Returns the Driver class for the provided cluster_type.
With the following classes:
class Driver1(Driver):
provides = [
('server_type1', 'os1', 'coe1')
]
class Driver2(Driver):
provides = [
('server_type2', 'os2', 'coe2')
]
And the following entry_points:
magnum.drivers =
driver_name_1 = some.python.path:Driver1
driver_name_2 = some.python.path:Driver2
get_driver('server_type2', 'os2', 'coe2')
will return: Driver2
:param server_type: The server_type the cluster definition will build
on
:param os: The operating system the cluster definition will build on
:param coe: The Container Orchestration Environment the cluster will
produce
:return: class
"""
definition_map = cls.get_drivers()
cluster_type = (server_type, os, coe)
if cluster_type not in definition_map:
raise exception.ClusterTypeNotSupported(
server_type=server_type,
os=os,
coe=coe)
driver_info = definition_map[cluster_type]
# TODO(muralia): once --drivername is supported as an input during
# cluster create, change the following line to use driver name for
# loading.
return driver.DriverManager("magnum.drivers",
driver_info['entry_point_name']).driver()