def setup(agent_config, network, service, sim_config, seed, steps, weights,
verbose, DATETIME, test, append_test, best, test_episodes, sim_seed,
gen_scenario):
"""Overall setup for the rl variables"""
if best:
assert not (test or append_test or weights
), "Cannot run 'best' with test, append_test, or weights"
result_dir = f"results/{get_base_path(agent_config, network, service, sim_config)}"
test = select_best_agent(result_dir)
# Create the AgentHelper data class
agent_helper = AgentHelper(agent_config, network, service, sim_config,
seed, steps, weights, verbose, DATETIME, test,
append_test, test_episodes, sim_seed,
gen_scenario)
# Setup the files and paths required for the agent
setup_files(agent_helper, best)
set_random_seed(seed, agent_helper)
agent_helper.config = get_config(agent_helper.agent_config_path)
agent_helper.result.steps = agent_helper.steps
# Get number of ingress nodes in the network
no_of_ingress = num_ingress(network)
# Create an input file with num_of_ingress and Algorithm used as attributes in the results directory
create_input_file(agent_helper.config_dir, no_of_ingress,
agent_helper.config.get('agent_type'))
return agent_helper
def main():
# Parse arguments
args = parse_args()
if not args.seed:
args.seed = random.randint(1, 9999)
logging.basicConfig(level=logging.INFO)
logging.getLogger("coordsim").setLevel(logging.WARNING)
# Creating the results directory variable where the simulator result files will be written
network_stem = os.path.splitext(os.path.basename(args.network))[0]
service_function_stem = os.path.splitext(
os.path.basename(args.service_functions))[0]
simulator_config_stem = os.path.splitext(os.path.basename(args.config))[0]
results_dir = f"{PROJECT_ROOT}/results/{network_stem}/{service_function_stem}/{simulator_config_stem}" \
f"/{DATETIME}_seed{args.seed}"
# creating the simulator
simulator = Simulator(os.path.abspath(args.network),
os.path.abspath(args.service_functions),
os.path.abspath(args.config),
test_mode=True,
test_dir=results_dir)
init_state = simulator.init(args.seed)
log.info("Network Stats after init(): %s", init_state.network_stats)
nodes_list = [node['id'] for node in init_state.network.get('nodes')]
nodes_with_capacity = []
for node in simulator.network.nodes(data=True):
if node[1]['cap'] > 0:
nodes_with_capacity.append(node[0])
sf_list = list(init_state.service_functions.keys())
sfc_list = list(init_state.sfcs.keys())
ingress_nodes = get_ingress_nodes_and_cap(simulator.network)
# we place every sf on each node of the network with some capacity, so placement is calculated only once
placement = get_placement(nodes_with_capacity, sf_list)
# Uniformly distributing the schedule for all Nodes with some capacity
schedule = get_schedule(nodes_list, nodes_with_capacity, sf_list, sfc_list)
# Since the placement and the schedule are fixed , the action would also be the same throughout
action = SimulatorAction(placement, schedule)
# iterations define the number of time we wanna call apply()
log.info(f"Running for {args.iterations} iterations...")
for i in tqdm(range(args.iterations)):
_ = simulator.apply(action)
# We copy the input files(network, simulator config....) to the results directory
copy_input_files(results_dir, os.path.abspath(args.network),
os.path.abspath(args.service_functions),
os.path.abspath(args.config))
# Creating the input file in the results directory containing the num_ingress and the Algo used attributes
create_input_file(results_dir, len(ingress_nodes), "LB")
log.info(f"Saved results in {results_dir}")
def main():
args = parse_args()
if not args.seed:
args.seed = random.randint(1, 9999)
# os.makedirs("logs", exist_ok=True)
# logging.basicConfig(filename="logs/{}_{}_{}.log".format(os.path.basename(args.network),
# DATETIME, args.seed), level=logging.INFO)
# logging.getLogger("coordsim").setLevel(logging.WARNING)
# logging.getLogger("bjointsp").setLevel(logging.INFO)
# Creating the results directory variable where the simulator result files will be written
network_stem = os.path.splitext(os.path.basename(args.network))[0]
service_function_stem = os.path.splitext(
os.path.basename(args.service_functions))[0]
simulator_config_stem = os.path.splitext(os.path.basename(args.config))[0]
results_dir = f"{PROJECT_ROOT}/results/{network_stem}/{service_function_stem}/{simulator_config_stem}" \
f"/{DATETIME}_seed{args.seed}"
# creating the simulator
# initializing the simulator with absolute paths to the network, service_functions and the config. files.
simulator = Simulator(os.path.abspath(args.network),
os.path.abspath(args.service_functions),
os.path.abspath(args.config),
test_mode=True,
test_dir=results_dir)
init_state = simulator.init(args.seed)
# log.info("Network Stats after init(): %s", init_state.network_stats)
# assuming for now that there is only one SFC.
sfc_name = list(init_state.sfcs.keys())[0]
sf_list = list(init_state.sfcs.get(sfc_name))
sf_delays_dict = init_state.service_functions
nodes_list = [node['id'] for node in init_state.network.get('nodes')]
ingress_nodes, node_cap = get_ingress_nodes_and_cap(simulator.network)
# Getting the Mean Flow Data rate and flow size from the simulator_config.yaml file
with open(args.config, "r") as f:
conf = yaml.load(f, yaml.SafeLoader)
flow_dr_mean = conf.get('flow_dr_mean')
flow_size = conf.get('flow_size_shape')
run_duration = conf.get('run_duration')
inter_arrival_mean = conf.get('inter_arrival_mean')
flow_duration = (float(flow_size) / float(flow_dr_mean)
) * 1000 # Converted flow duration to ms
# Getting Processing delay from Service_functions file
with open(args.service_functions, "r") as f:
service_func = yaml.load(f, yaml.SafeLoader)
processing_delay = service_func['sf_list'][
sf_list[0]]['processing_delay_mean']
# The template object is fixed, so it is created just once and used throughout for the 'place' fx of BJointSP
template = create_template(sfc_name, sf_list, sf_delays_dict)
# Since after the init() call to Simulator we don't get any traffic info back
# we can't create the source needed for 'place' function of BJointSP,
# So we for just the first 'place' call to BJointSP create a source with just ingress nodes having *
# *vnf_source as the vnf in it and date_rate of flow_dr_mean from the config file
num_flows = run_duration / inter_arrival_mean
overlapping_flows = math.ceil(
(num_flows * (processing_delay + flow_duration)) / run_duration)
source_list = []
j = 1
for i in range(len(ingress_nodes)):
flows = []
for _ in range(int(overlapping_flows / flow_dr_mean)):
flows.append({"id": "f" + str(j), "data_rate": flow_dr_mean})
j += 1
source_list.append({
'node': ingress_nodes[i],
'vnf': "vnf_source",
'flows': flows
})
# Since the simulator right now does not have any link_dr , we are using a high value = 1000 for now.
first_result = bjointsp_place(os.path.abspath(args.network),
template,
source_list,
source_template_object=True,
cpu=node_cap,
mem=node_cap,
networkx=simulator.network,
write_result=False,
logging_level=None)
# creating the schedule and placement for the simulator from the first result file that BJointSP returns.
placement, schedule = get_placement_and_schedule(first_result, nodes_list,
sfc_name, sf_list)
# We run the simulator iterations number of times to get the Traffic info from the SimulatorAction object
# We generate new source file for the BJointSP from the traffic info we get from the simulator for each iteration
# Using this source file and the already generated Template file we call the 'place' fx of BJointSP
# In-case no source exists, we use the previous placement and schedule
for _ in tqdm(range(args.iterations)):
action = SimulatorAction(placement, schedule)
apply_state = simulator.apply(action)
source, source_exists = create_source_object(
apply_state.traffic, sf_list, sfc_name, ingress_nodes,
flow_dr_mean, processing_delay, flow_duration, run_duration)
if source_exists:
result = bjointsp_place(os.path.abspath(args.network),
template,
source,
source_template_object=True,
cpu=node_cap,
mem=node_cap,
networkx=simulator.network,
write_result=False,
logging_level=None)
placement, schedule = get_placement_and_schedule(
result, nodes_list, sfc_name, sf_list)
copy_input_files(results_dir, os.path.abspath(args.network),
os.path.abspath(args.service_functions),
os.path.abspath(args.config))
create_input_file(results_dir, len(ingress_nodes), "BJointSP-Fixed")
print(f"Saved results in {results_dir}")
