| #!/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 random |
| import string |
| |
| 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 ^ 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 |