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#!/usr/bin/env python
"""
Generate the partitions json file from the $OC* environment variables
Usage: onos-gen-partitions [output file]
If output file is not provided, the json is written to stdout.
"""
from os import environ
from collections import deque, OrderedDict
import re
import json
import sys
import hashlib
convert = lambda text: int(text) if text.isdigit() else text.lower()
alphanum_key = lambda key: [convert(c) for c in re.split('([0-9]+)', key)]
def get_OC_vars():
vars = []
for var in environ:
if re.match(r"OC[0-9]+", var):
vars.append(var)
return sorted(vars, key=alphanum_key)
def get_nodes(vars, port=9876):
node = lambda k: { 'id': k, 'ip': k, 'port': port }
return [ node(environ[v]) for v in vars ]
def generate_permutations(nodes, k):
l = deque(nodes)
perms = []
for i in range(1, len(nodes)+1):
part = {
'name': 'p%d' % i,
'members': list(l)[:k]
}
perms.append(part)
l.rotate(-1)
return perms
if __name__ == '__main__':
vars = get_OC_vars()
nodes = get_nodes(vars)
partitions = generate_permutations([v.get('id') for v in nodes], 3)
name = 0
for node in nodes:
name = name ^ hash(node['ip'])
data = {
'name': name,
'nodes': nodes,
'partitions': partitions
}
output = json.dumps(data, indent=4)
if len(sys.argv) == 2:
filename = sys.argv[1]
with open(filename, 'w') as f:
f.write(output)
else:
print output
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