def setUp(self):
# Define namespace id and names
self.ns_id1 = "ns_id1"
self.ns_id2 = "ns_id2"
self.ns_name1 = "ns_name1"
self.ns_name2 = "ns_name2"
# Add namespaces
TopologyMap.add_namespace(self.ns_id1, self.ns_name1)
TopologyMap.add_namespace(self.ns_id2, self.ns_name2)
# Define interface id and names
self.int_id1 = "int_id1"
self.int_id2 = "int_id2"
self.int_name1 = "int_name1"
self.int_name2 = "int_name2"
# Add interfaces
TopologyMap.add_interface(self.ns_id1, self.int_id1, self.int_name1)
TopologyMap.add_interface(self.ns_id1, self.int_id2, self.int_name2)
def __init__(self, name):
"""
Create a node with given `name`.
An unique `id` is assigned to this node which is used by
`engine` module to create the network namespace.
This ensures that there is no naming conflict between any two
nodes.
Parameters
----------
name: str
The name of the node to be created
"""
if name == "":
raise ValueError("Node name can't be an empty string")
if config.get_value("assign_random_names") is False and len(name) > 3:
# We chose 3 because: 'ifb-ns1-ns2-20' is a potential IFB interface name
# and it's already 14 character long. Note that here node names
# are 'ns1' and 'ns2'. The `ip` utility won't accept interface names
# longer than 15 characters
logger.warning(
"%s is longer than 3 characters. It's safer to use "
"node names with atmost 3 characters with the current config.",
name,
)
self._name = name
self._id = IdGen.get_id(name)
self._interfaces = []
# mpls max platform label kernel parameter
self._mpls_max_label = 0
# Global variable disables when any new node is created
# to ensure DAD check (if applicable)
g_var.IS_DAD_CHECKED = False
engine.create_ns(self.id)
engine.set_interface_mode(self.id, "lo", "up")
TopologyMap.add_namespace(self.id, self.name)
TopologyMap.add_host(self)
def test_add_same_entity_again(self):
with self.assertRaises(ValueError):
TopologyMap.add_namespace(self.ns_id1, self.ns_name1)
with self.assertRaises(ValueError):
TopologyMap.add_interface(self.ns_id1, self.int_id1,
self.int_name1)
