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topocreatefattree.py
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topocreatefattree.py
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#!/usr/bin/env python3
# -*- encoding: utf-8 -*-
import json
from pathlib import Path
from counteriter import CounterIterator
from toporender import main as renderer
SPEED = 1
CORE = 3
PODS = 4
LEAFS = 2
hosts_iter = CounterIterator()
switch_iter = CounterIterator()
def reset_iters():
global hosts_iter
global switch_iter
hosts_iter = CounterIterator()
switch_iter = CounterIterator()
def sew_rows(I, J, bw=None):
return [(i, j, bw) for i in I for j in J]
def create_edge_layer(root):
this_hosts = []
this_switches = []
this_links = []
for _ in range(LEAFS):
this_hosts.append(f'h{next(hosts_iter)}')
this_links.append((root, this_hosts[-1], SPEED))
return this_hosts, this_switches, this_links
def create_aggregation_layer():
this_hosts = []
this_switches = []
this_links = []
outer_sws = [f's{next(switch_iter)}' for i in range(LEAFS)]
inner_sws = [f's{next(switch_iter)}' for i in range(LEAFS)]
this_links+=sew_rows(outer_sws, inner_sws, SPEED)
for i in inner_sws:
h,s,l = create_edge_layer(i)
this_hosts += h
this_switches += s
this_links += l
this_switches += outer_sws
this_switches += inner_sws
return this_hosts, this_switches, this_links
def create_topo():
this_hosts = []
this_switches = []
this_links = []
cores = [f's{next(switch_iter)}' for i in range(CORE)]
pods_inner_sws = []
for i in range(PODS):
h, s, l = create_aggregation_layer()
this_hosts += h
this_switches += s
this_links += l
pods_inner_sws += s[:-LEAFS]
this_links += sew_rows(pods_inner_sws, cores, SPEED)
this_switches += cores
return this_hosts, this_switches, this_links
def main(fn: str = 'fattree'):
reset_iters()
topo = create_topo()
reset_iters()
Path(f'{fn}.json').write_text(json.dumps(topo))
renderer(fn)
if __name__ == '__main__':
main()