def test_ReplList(): l = ReplList() l.reset([1, 2, 3], _doApply=True) assert l.rawData() == [1, 2, 3] l.set(1, 10, _doApply=True) assert l.rawData() == [1, 10, 3] l.append(42, _doApply=True) assert l.rawData() == [1, 10, 3, 42] l.extend([5, 6], _doApply=True) assert l.rawData() == [1, 10, 3, 42, 5, 6] l.insert(2, 66, _doApply=True) assert l.rawData() == [1, 10, 66, 3, 42, 5, 6] l.remove(66, _doApply=True) assert l.rawData() == [1, 10, 3, 42, 5, 6] l.pop(1, _doApply=True) assert l.rawData() == [1, 3, 42, 5, 6] l.sort(reverse=True, _doApply=True) assert l.rawData() == [42, 6, 5, 3, 1] assert l.index(6) == 1 assert l.count(42) == 1 assert l.get(2) == 5 assert l[4] == 1 assert len(l) == 5 l.__setitem__(0, 43, _doApply=True) assert l[0] == 43
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()