blob: f7ae14df351d66b243709bf7fad903f8b14e6a2a [file] [log] [blame]
#!/usr/bin/env python
"""
Generate the partitions json file from the $OC* environment variables
Usage: onos-gen-partitions [output file] [node_ip ...]
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(ips=None, port=9876):
node = lambda k: { 'id': k, 'ip': k, 'port': port }
if not ips:
ips = [ environ[v] for v in get_OC_vars() ]
return [ node(v) for v in ips ]
def generate_base_partition(nodes):
return {
'id': 0,
'members': nodes
}
def generate_extended_partitions(nodes, k):
l = deque(nodes)
perms = []
for i in range(1, len(nodes)+1):
part = {
'id': i,
'members': list(l)[:k]
}
perms.append(part)
l.rotate(-1)
return perms
if __name__ == '__main__':
nodes = get_nodes(sys.argv[2:])
base_partition = generate_base_partition([v.get('id') for v in nodes])
extended_partitions = generate_extended_partitions([v.get('id') for v in nodes], 3)
partitions = []
partitions.append(base_partition)
partitions.extend(extended_partitions)
m = hashlib.sha256()
for node in nodes:
m.update(node['ip'])
name = int(m.hexdigest()[:8], base=16) # 32-bit int based on SHA256 digest
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