def __init__(self, logger, host, port):
cfg = SyncObjConf()
cfg.fullDumpFile = 'raft.bin'
cfg.logCompactionMinTime = 10
cfg.useFork = True
self.serv = ThreadXMLRPCServer(
(host, port),
logRequests=True)
for name in self._rpc_methods:
self.serv.register_function(getattr(self, name))
self.logger = logger
self.host = host
self.port = port
self.lock = RWLock()
self.act_vol_serv = dict()
self.writable_vid = ReplList() # 可写的vid
self.vid = ReplCounter()
self.fkey = ReplCounter()
self.db = ReplDict()
super(Master, self).__init__(config.addr, config.clusters, cfg, consumers=[self.vid, self.fkey, self.db, self.writable_vid])
def measure(argv):
"""Measure throughput in 15s"""
# Parse parameters
quorumSize1, quorumSize2, drop_ratio, selfAddr, partners = parseParams(
argv)
maxCommandsQueueSize = int(0.9 * SyncObjConf().commandsQueueSize /
len(partners))
# Init a TestObj
counter1 = ReplCounter()
obj = SyncObj(selfAddr,
partners,
quorumSize1,
quorumSize2,
drop_ratio,
consumers=[counter1])
while obj._getLeader() is None:
time.sleep(0.5)
time.sleep(4.0)
count = 0
startTime = time.time()
while time.time() - startTime < 10.0:
counter1.inc()
while time.time() - startTime < 40.0:
counter1.inc()
count += 1
print(obj.getStatus()['raft_term'])
time.sleep(4.0)
return count
def test_ReplCounter():
c = ReplCounter()
c.set(42, _doApply=True)
assert c.get() == 42
c.add(10, _doApply=True)
assert c.get() == 52
c.sub(20, _doApply=True)
assert c.get() == 32
c.inc(_doApply=True)
assert c.get() == 33
class Master(SyncObj):
_rpc_methods = ['assign_volumn', 'assign_fid', 'find_volumn', 'find_writable_volumn',
'volumn_status', 'node_status']
def __init__(self, logger, host, port):
cfg = SyncObjConf()
cfg.fullDumpFile = 'raft.bin'
cfg.logCompactionMinTime = 10
cfg.useFork = True
self.serv = ThreadXMLRPCServer(
(host, port),
logRequests=True)
for name in self._rpc_methods:
self.serv.register_function(getattr(self, name))
self.logger = logger
self.host = host
self.port = port
self.lock = RWLock()
self.act_vol_serv = dict()
self.writable_vid = ReplList() # 可写的vid
self.vid = ReplCounter()
self.fkey = ReplCounter()
self.db = ReplDict()
super(Master, self).__init__(config.addr, config.clusters, cfg, consumers=[self.vid, self.fkey, self.db, self.writable_vid])
def update_master(self, masters):
pass
def _recover(self, vid, dead_vid, from_vid, to_vid):
from_proxy = ServerProxy(self.act_vol_serv[from_vid])
to_addr = self.act_vol_serv[to_vid]
self.logger.info('Begin to migrate volumn %d from %s to %s...!' % (vid, from_vid, to_vid))
from_proxy.migrate_volumn_to(vid, to_addr)
self.logger.info('Migrate volumn %d from %s to %s succeed!' % (vid, from_vid, to_vid))
vids = self.db[vid]
vids.remove(dead_vid)
vids.append(to_vid)
self.db.set(vid, vids, sync=True)
self.update_writable_volumn()
self.logger.info('Remove %s, append %s' % (dead_vid, to_vid))
def _check(self, dead_vid):
self.logger.info('Monitor dead volumn server %s ...' % dead_vid)
t = 60
while t > 0:
time.sleep(1)
if dead_vid in self.act_vol_serv.keys():
self.logger.info('Volumn %s becomes live. Stop recover' % dead_vid)
_thread.exit()
t -= 1
for vid, vvids in self.db.items():
if dead_vid in vvids:
for recov_vid in vvids:
if recov_vid != dead_vid and recov_vid in self.act_vol_serv.keys():
from_vid = recov_vid
avl_vids = list(set(self.act_vol_serv.keys()) - set(vvids))
if avl_vids:
to_vid = random.choice(avl_vids)
_thread.start_new_thread(self._recover, (vid, dead_vid, from_vid, to_vid))
else:
self.logger.warn('No available volumns to migrate')
break
def update_writable_volumn(self, checkLeader=True):
if checkLeader and not self._isLeader():
return
writable_vid = list()
for vid, vvids in self.db.items():
flag = True
for vvid in vvids:
if vvid not in self.act_vol_serv.keys():
flag = False
break
if flag:
writable_vid.append(vid)
self.writable_vid.reset(writable_vid, sync=True)
# 检查volumn下线的情况，搬运
def update_volumn(self, volumns):
if self._isLeader():
old_volumns = set(self.act_vol_serv.keys())
new_volumns = set([volumn[0] for volumn in volumns])
off_volumns = list(old_volumns - new_volumns)
if off_volumns:
self.logger.info('{} volumns become offline'.format(off_volumns))
for off_volumn in off_volumns:
_thread.start_new_thread(self._check, (off_volumn,))
self.act_vol_serv.clear()
for volumn in volumns:
self.act_vol_serv[volumn[0]] = volumn[1]
while not self._isReady():
time.sleep(1)
self.update_writable_volumn()
def assign_volumn(self, size):
vid = self.vid.inc(sync=True)
vids = random.sample(self.act_vol_serv.keys(), 2)
for vvid in vids:
s = ServerProxy(self.act_vol_serv[vvid])
s.assign_volumn(vid, size)
self.db.set(vid, vids, sync=True)
self.update_writable_volumn(False)
return vid
def assign_fid(self):
if not self.writable_vid:
return ''
vid = random.choice(list(self.writable_vid))
fkey = self.fkey.inc(sync=True)
fid = '%d,%d' % (vid, fkey)
return fid
def find_volumn(self, vid):
vids = self.db[vid]
addrs = []
for vid in vids:
if vid in self.act_vol_serv:
addrs.append(self.act_vol_serv[vid])
return addrs
def find_writable_volumn(self, vid):
if vid in self.writable_vid:
return self.find_volumn(vid)
else:
return []
def volumn_status(self):
res = dict()
vol_status = dict()
for vol_serv_id, vol_serv in self.act_vol_serv.items():
try:
s = ServerProxy(vol_serv)
vv = s.status()
vol_status[vol_serv_id] = vv
except:
pass
for vid, vvids in self.db.items():
sdoc = dict()
ava_nodes = list(set(vol_status.keys()) & set(vvids))
sdoc['tat_node_num'] = len(vvids)
sdoc['ava_node_num'] = len(ava_nodes)
if ava_nodes:
vol_sdoc = vol_status[ava_nodes[0]]
vdoc = vol_sdoc['vdb'][str(vid)]
sdoc['total_size'] = vdoc['size']
sdoc['used_size'] = vdoc['counter']
sdoc['free_size'] = sdoc['total_size'] - sdoc['used_size']
else:
sdoc['total_size'] = 0
sdoc['used_size'] = 0
sdoc['free_size'] = 0
res[str(vid)] = sdoc
return res
def node_status(self):
res = dict()
for vol_serv_id, vol_serv in self.act_vol_serv.items():
try:
s = ServerProxy(vol_serv)
vv = s.status()
vol_status = dict()
vol_status['addr'] = vol_serv
vol_status['total'] = vv['total']
vol_status['used'] = vv['used']
vol_status['free'] = vv['free']
vol_status['nodes'] = list(vv['vdb'].keys())
for node in vol_status['nodes']:
vids = self.db.get(int(node), [])
if vol_serv_id not in vids:
vol_status['nodes'].remove(node)
res[vol_serv_id] = vol_status
except:
self.logger.exception('Got an exception')
return res
def start(self):
self.logger.info('Start serving at %s:%d' % (self.host, self.port))
self.serv.serve_forever()
from collections import defaultdict
from flask import Flask, request
from pysyncobj import SyncObj, replicated
from pysyncobj.batteries import ReplCounter
import json
import os
import socket
RAFT_PORT = "4321"
MY_NODE_NUM = int(os.environ["MY_NODE_NUM"])
TOTAL_NODES = int(os.environ["TOTAL_NODES"])
ADDRESSES = ["node" + str(n) + ":" + RAFT_PORT for n in range(TOTAL_NODES)]
MY_ADDRESS = ADDRESSES[MY_NODE_NUM]
PEER_ADDRESSES = [ADDRESSES[i] for i in range(TOTAL_NODES) if i != MY_NODE_NUM]
counter = ReplCounter()
sync = SyncObj(MY_ADDRESS, PEER_ADDRESSES, consumers=[counter])
sync.waitBinded()
app = Flask(__name__)
@app.route("/inc")
def inc():
return json.dumps(counter.inc(sync=True))
@app.route("/status")
def status():
return json.dumps(sync.getStatus())
def __init__(self, ip, port, selfnode, othernodes): super(GameServer, self).__init__(ip, port, GameServerEntity) self.data = ReplCounter() self.syncObj = SyncObj(selfnode, othernodes, consumers=[self.data, ])
def main():
# log everything to stderr because compose containers for some reason aren't logging stdout
logging.basicConfig(level=logging.DEBUG,
filename='/proc/self/fd/2',
filemode='w')
peers = None if "NBDD_PEERS" not in os.environ else os.environ[
"NBDD_PEERS"].split(",")
hostname = os.environ.get("NBDD_HOSTNAME")
# contains all blocks for all devices as a contiguous list of bytes
blocks = []
# a list of all devices so we know the starting offset of a given device in `blocks`
# (all devices are fixed size)
volumes = []
tracer = jaeger_client.Config(
config={
'sampler': {
'type': 'const',
'param': 1,
},
'logging': True,
},
service_name='nbd',
).initialize_tracer()
if peers:
LocalState.f = open('/tmp/blocks', 'r+b')
write_cache = LoglessCache()
LocalState.write_sharer = WriteSharer(peers, write_cache)
_thread.start_new_thread(LocalState.write_sharer.listen_for_asks, ())
LocalState.lock = threading.Lock()
LocalState.hostname = hostname
LocalState.write_count = 0
blocks = ReplFile()
volumes = ReplList()
health_counter = ReplCounter()
HealthHandler.counter = health_counter
self_address = "{}:2001".format(hostname)
peer_addresses = ["{}:2001".format(peer) for peer in peers]
syncObj = SyncObj(self_address,
peer_addresses,
consumers=[blocks, volumes, health_counter])
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('0.0.0.0', 2000))
sock.setblocking(True)
sock.listen(1)
httpd = HTTPServer(('0.0.0.0', 8080), HealthHandler)
_thread.start_new_thread(httpd.serve_forever, ())
# Prototype will listen to one client at a time
# -- can be made concurrent without much extra work
logging.info("NBD Server '{}' Starting with peers {}...".format(
hostname, peers))
while True:
cxn, client = sock.accept()
logging.info("Connection accepted from client {}".format(client))
_thread.start_new_thread(handle_cxn, (cxn, blocks, volumes, tracer))
logging.info(
"Connection closed by client {} -- listening for next client".
format(client))