| #!/usr/bin/env python |
| """ |
| Generate the partitions json file from the $OC* environment variables |
| |
| Usage: onos-gen-partitions output_file [num_nodes] [-e] |
| 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_extended_partitions_scaling(nodes, k, partitions=3, equal=False): |
| l = deque(nodes) |
| perms = [] |
| for i in range(1, partitions + 1): |
| if equal: |
| members = list(l) |
| else: |
| members = list(l)[:k] |
| |
| part = { |
| 'id': i, |
| 'members': members |
| } |
| perms.append(part) |
| l.rotate(-2) |
| return perms |
| |
| if __name__ == '__main__': |
| vars = get_OC_vars() |
| # NOTE: likely prone to errors |
| nodes = get_nodes(vars) |
| num = None |
| equal = False |
| if len(sys.argv) >= 3: |
| num = int(sys.argv[2]) |
| try: |
| equal = "-e" in sys.argv[3] |
| except: |
| equal = False |
| if num: |
| nodes = nodes[:num] |
| |
| extended_partitions = generate_extended_partitions_scaling([v.get('id') for v in nodes], |
| 3, equal=equal) |
| partitions = [] |
| partitions.extend(extended_partitions) |
| name = hash("HAScaling") |
| 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 |