kafka/tools/assigner/models/replica_election.py
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import json
import os
import subprocess
from tempfile import NamedTemporaryFile
from kafka.tools.models import BaseModel
class ReplicaElection(BaseModel):
equality_attrs = ['partitions']
def __init__(self, partitions, pause_time=300):
self.partitions = partitions
self.pause_time = pause_time
def __repr__(self):
return json.dumps(self.dict_for_replica_election())
def dict_for_replica_election(self):
ple = {'partitions': []}
for partition in self.partitions:
ple['partitions'].append(partition.dict_for_replica_election())
return ple
def execute(self, num, total, zookeeper, tools_path, plugins=[], dry_run=True):
if not dry_run:
with NamedTemporaryFile(mode='w') as assignfile:
json.dump(self.dict_for_replica_election(), assignfile)
assignfile.flush()
FNULL = open(os.devnull, 'w')
subprocess.call(['{0}/kafka-preferred-replica-election.sh'.format(tools_path),
'--zookeeper', zookeeper,
'--path-to-json-file', assignfile.name],
stdout=FNULL, stderr=FNULL)