-
Notifications
You must be signed in to change notification settings - Fork 0
/
mnbroker.js
699 lines (623 loc) · 19.3 KB
/
mnbroker.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
var zmq = require('zmq'),
socket_ctr = zmq.socket('router'),
socket_pub = zmq.socket('pub'),
socket_sub = zmq.socket('sub'),
//child_process = require('child_process'),
//forever =forever = require('forever-monitor'),
utils = require('./utils/common.js'),
lrp = require('./lrpManager/lrp.js'),
servers = require('./config/servers.js'),
confMod = require('./config.js'),
config = confMod.config();
const REQ_BOOT = 'bt',
REQ_ADD_PEER = 'ap',
REQ_REM_PEER = 'rp',
REQ_UPD_PEER = 'up';
const STATE_OFF = -1,
STATE_INIT = 0,
STATE_READY = 1,
STATE_ACTIVE = 2,
STATE_NO_MANGER_PROCESS = 5;
const SUB_ALL = 'ALL';
const PUB_INTERVALL = 20000;//ms
var replyQueue = {},
waitingReadyQueue = {},
nextReqId = 1;
process.on('exit', function(){
console.log('exit')
mnb_close();
})
/* BEGIN BROKER OPS */
/** Add new worker process/es to the specified service broker
* @param service broker_id the broker id
* @param int n number of new worked to be start up
* @param function callaback callback function
*/
var broker_add_worker = function(service, n, callback){
var count = 0,
errs = [],
worker = config.services[service].worker;
for(var i in worker.config.args)
args.push(worker.config.args[i])
for(i = 0; i < n; i++){
var args = [config.newSocketId(service, confMod.TYPE_WORKER), config.services[service].broker.config.socket.lba];//'ipc:///tmp/55001'];//
lrpManager.startProcess(worker.config.file, args, [], {service: service, procType: worker.config.procType, type: confMod.TYPE_WORKER}, function(err, res){
if(err){
errs.push(err);
}else{
res['procType'] = worker.config.procType;
res['type'] = confMod.TYPE_WORKER;
config.addServiceProcess(service, res, function(err, r){
count++;
if(callback && count + errs.length >= n){
if(errs.length == 0)
callback(null, count);
else
callback(errs, count);
}
});
}
});
}
}
/**
* Remove workers from the specified service
* @param string brokerId the broker id
* @param int/array(string) n number of new worked to shut down
* @param function callaback callback function
*/
var broker_rem_woker = function(service, n, callback){
var count = 0,
i = 0,
errs = [],
proc = config.services[service].worker.proc,
brokerId = config.services[service].broker.id;
if(typeof(n) == 'number'){
if(proc.length < n)
n = proc.length;
for(var id in proc){
if(i++ >= n)
break;
(function(){
var wId = id;
lrpManager.stopProcess(wId, function(err, res){
if(err){
errs.push(err);
}else{
delete proc[wId];
count++;
}
if(callback && count + errs.length >= n)
config.remServiceProcess(service, wId, function(err, res){
if(errs.length > 0)
callback(errs, count);
else
callback(null, count);
});
});
})();
}
}
if(typeof(n) == 'object'){
for(var i in n){
if(proc[i]){
(function(){
var wId = i;
lrpManager.stopProcess(n[wId], function(err, res){
if(err){
errs.push(err);
}else{
delete proc[wId];
count++;
}
if(callback && count + errs.length >= n)
config.remServiceProcess(service, n[wId], function(err, res){
if(errs.length > 0)
callback(errs, count);
else
callback(null, count);
});
});
});
}
}
}
}
/**
* Add broker peer
* @param string broker_id the broker id
* @param array peer array of broker peer
* @param function callaback callback function
*/
var broker_add_peer = function(service, peer, callback){
//check if is already set the peer on service
//console.log('broker_add_peer', service, peer)
if(!config.services[service].peers[peer])
return callback('Error broker_add_peer: Wrong arguments.', null);
var peerInfo = config.services[service].peers[peer],
addr = peerInfo.socket.addr,
id = peerInfo.socket.id;
//console.log([config.services[service].broker.id, utils.stringify({req:REQ_ADD_PEER, addr: addr, id: id})])
socket_ctr.send([config.services[service].broker.id, utils.stringify({req:REQ_ADD_PEER, addr: addr, id: id})]);
callback(null, null);
}
/**
* Remove broker peer
* @param string broker_id the broker id
* @param array peer array of broker peer
* @param function callaback callback function
*/
var broker_rem_peer = function(service, peer, callback){
if(!config.services[service].peers[peer])
return callback('Error broker_rem_peer: Wrong arguments.', null);
var id = config.services[service].peers[peer].socket.id;
socket_ctr.send([config.services[service].broker.id, utils.stringify({req:REQ_REM_PEER, id: id})]);
config.remServicePeer(service, id, callback);
}
/**
* Remove broker peer
* @param string broker_id the broker id
* @param array peer array of broker peer info to update
* @param function callaback callback function
*/
var broker_update_peer = broker_add_peer;
/* END OF BROKER OPS */
/* BEGIN OF MASTER NODE BROKER OPS */
/**
* Init the master node broker
* @param function callback
*/
var mnb_init = function(callback){
var startServices = function(){
console.log('LrpManager \t---\tUP');
config.checkProcess(lrpManager, function(err, res){
if(err)
console.log(err);
if(res)
console.log('Check prev. active process: OK')
else
console.log('Inctive process removed');
var count = 0,
servicesNum = utils.length(config.services),
errs = [];
//start services
for(var i in config.services){
(function(){
var srv = i;
mnb_start_service(srv, function(err, res){
if(err)
errs.push(err);
console.log('Service - ' + config.services[srv].name + ' \t---\tUP')
count++;
if(count == servicesNum){
console.log(count + ' services started');
if(errs.length == 0)
return callback(null, count);
return callback(errs, count);
}
});
})();
}
});
}
lrpManager = lrp.Manager();
config.newNode(function(err, res){
//setup control socket
config.loadAndSetNodeInfo(function(){
//console.log(config)
//console.log(config.mnb)
socket_ctr.identity = config.mnb.controlId;
socket_ctr.bindSync(config.mnb.controlAddress);
socket_ctr.on('message', handleControlMessage);
socket_sub.subscribe(SUB_ALL);
socket_sub.subscribe(config.node.id);
socket_sub.on('message', handleSubMessage);
socket_pub.identity = config.mnb.pubId;
socket_pub.bindSync(config.mnb.pubAddress);
setInterval(mnb_pub_nodeInfo, PUB_INTERVALL);
config.watchPeers(function(err, res){
console.log('watch', err, res)
if(config.peers[res])
handlePeerDown(res);
else
handlePeerUp(res);
});
loadServiceInfo(function(err, res){
//console.log(err, res)
//mnb peers discovery
config.peersDiscovery(function(err, res){
if(err){
console.log('err: ', err);
}
//console.log('res', res)
for(var i in res){
mnb_add_peer(i);
}
//start lrp manager
if(lrpManager.isReady())
startServices();
else{
lrpManager.on('ready', startServices);
}
});
});
});
});
}
/**
* Stop the master node broker
*/
var mnb_close = function(){
console.log('stopAll')
socket_ctr.close();
socket_pub.close();
socket_sub.close();
lrp.stopAllProcess(function(err, res){
callback(err, res);
});
}
/**
* Start a service
* @param string service service id
* @param function callaback callback function
*/
var mnb_start_service = function(service, callback){
var active = function(){
config.services[service].state = STATE_READY;//
//console.log(service, config.services[service].worker.config)
//console.log('waitingReadyQueue')
//console.log(config.services[service].peers)
var count = 0,
len = 0;
if(config.services[service].worker && config.services[service].worker.config)
len++;
if(utils.length(config.services[service].peers) > 0)
len++;
var fn = function(err, res){
if(++count == len)
return callback(null, null);
}
if(config.services[service].worker && config.services[service].worker.config)
mnb_active_service(service, fn);
if(utils.length(config.services[service].peers) > 0)
mnb_active_remote_service(service, fn);
};
//console.log('start service ', service, config.services[service].broker)
var broker = config.services[service].broker;
var id = config.newSocketId(service, confMod.TYPE_BROKER);
if(!id)
return callback('Error: bad generated socket id for service "' + service +'".', null);
var args = [id, config.mnb.controlAddress];
for(var i in broker.config.args)
args.push(broker.config.args[i]);
waitingReadyQueue[id] = active;
if(config.services[service].broker.proc){
//broker already active
active();
}else{
lrpManager.startProcess(broker.config.file ? broker.config.file : config.broker.defaultPath, args, [], {service: service, type: confMod.TYPE_BROKER, procType: lrp.TYPE_GENERIC}, function(err, res){
//console.log('started broker',service);
//console.log('start broker', service, 'peers', config.services[service].peers)
if(err)
return callback(err, null);
config.services[service].state = STATE_INIT;//
res['procType'] = lrp.TYPE_GENERIC;
res['type'] = confMod.TYPE_BROKER;
//console.log(res)
config.addServiceProcess(service, res, function(err, r){
if(err)
return callback(err, null);
});
});
}
}
/**
* Activate a service
* @param string service service id
* @param function callaback callback function
*/
var mnb_active_service = function(service, callback){
//console.log('active service', service);
if(!config.services[service].worker){
console.log('No worker config found for this service ' + service);
callback(null, null);
}
var worker = config.services[service].worker,
num;
if(config.services[service].state != STATE_READY)
return callback('Error: service not ready', null);
if(worker.proc && worker.config){
if(utils.length(worker.proc) >= worker.config.startProcNum)
return callback(utils.length(worker.proc));
else
num = worker.config.startProcNum - utils.length(worker.proc);
}else{
if(!worker.config)
return callback(null, 0);
num = worker.config.startProcNum;
}
broker_add_worker(service, num, function(err, res){
config.services[service].state = STATE_ACTIVE;//
var socket = config.services[service].broker.config.socket;
callback(err, res);
mnb_pub_nodeInfo();
});
}
/**
* Activate a service with remote worker
* @param string service service id
* @param function callaback callback function
*/
var mnb_active_remote_service = function(service, callback){
//console.log('active remote service', service);
//console.log('ars', service)
if(config.services[service].state != STATE_READY)
return callback('Error: service not ready', null);
var peers = config.services[service].peers;
//console.log(service, 'peers', peers)
if(!peers)
return callback('No peers found for service ' + service, null);
//console.log(config.services)
for(var i in peers){
broker_add_peer(service, i, function(err, res){
if(err)
return callback(err, null);
return callback(null, res);
});
}
}
/**
* Stop a service
* @param string service service id
* @param boolean onlyWorker true to stop only worker and not the broker
* @param function callaback callback function
*/
var mnb_stop_service = function(service, onlyWorker, callback){
if(!callback){
callback = onlyWorker;
onlyWorker = false;
}
var stopBroker = function(){
if(!onlyWorker)
lrpManager.stopProcess(config.services[service].worker.proc.length, function(err, res){
config.services[service].state = STATE_OFF;
callback(err, res);
});
}
if(config.services[service].proc.length > 0)
broker_rem_woker(service, config.services[service].worker.proc.length, function(err, res){
config.services[service].state = STATE_READY;
stopBroker();
})
else
stopBroker();
}
/**
* Add a mnb peer and setup the pu/sub channel
* @param string nodeId the node id
*/
var mnb_add_peer = function(nodeId){
socket_sub.connect(config.peers[nodeId].socket.addr);
console.log('connected to', config.peers[nodeId].socket.addr)
}
var handlePeerUp = function(peerId){
var self = this;
var count = 0;
//console.log('peer up')
config.getPeerSocketInfo(peerId, function(err, res){
//console.log(err, res)
if(err)
return;
//if(!res.addr || !res.id)
// return;
if(!config.peers[peerId])
config.peers[peerId] = {};
config.peers[peerId].socket = {
addr: res.addr,
id: res.id
};
//console.log(config.peers)
mnb_add_peer(peerId);
});
}
var handlePeerDown = function(peerId){
var self = this;
if(!self.peers[peerId])
return;
delete self.peers[peerId];
for(var i in self.services)
if(self.services[i].peers[peerId])
config.remServicePeer(i, peerId, function(err, res){});
console.log('deleted', peerId, self.peers)
}
/**
* Publish node info like service status, perf index, ecc
*/
var mnb_pub_nodeInfo = function(){
var info = {
node: config.node.id,
services: {},
peers: config.peers
};
for(var i in config.services){
if(config.services[i].sharable)
info.services[i] = {
addr: config.services[i].broker.config.socket.cfa,
id: config.services[i].broker.config.socket.cfi,
workers: utils.length(config.services[i].worker.proc)
}
}
socket_pub.send(SUB_ALL + ' ' + utils.stringify(info));
}
/**
* Update peer info from peer
*/
var mnb_update_peerInfo = function(){
}
/** Alert peer of critical info like service status changed
*/
var mnb_alert_peer = function(){
//realtime
}
/* PRIVATE FUNCTION */
/**
* Send a message and setup a callback for the reply
* @param string brokerId
* @param req
* @param array args
* @param function callback
*/
var send = function(brokerId, req, param, callback){
var reqId = nextReqId++;
var args = {reqId: reqId, req: req};
for(var i in param)
args[i] = param[i];
socket_ctr.send([brokerId, utils.stringify(args)]);
if(!callback)
return;
replyQueue[reqId] = {t: new Date().getTime(), cb: callback};
}
var handleControlMessage = function(){
var msg = utils.parse(arguments[1].toString());
//console.log(arguments[0].toString(), '-> ', msg);
if(isReq(msg)){
switch(msg.req){
case REQ_BOOT:
handleBoot(arguments[0]);
break;
}
}else{
//console.log('reply', replyQueue)
if(replyQueue[msg.reqId]){
replyQueue[msg.reqId].cb(null, msg.res);
delete replyQueue[msg.reqId];
}
}
}
var handleSubMessage = function(data){
data = data.toString();
var msg = utils.parse(data.substring(data.indexOf(' ')));
//console.log(msg)
for(var i in msg.services){
var srv = i;
if(config.services[srv]){
if(!config.services[srv].peers[msg.node])
config.addServicePeer(srv, msg.node, msg.services[srv], function(err, res){
if(err)
return;
broker_add_peer(srv, msg.node);
});
}else{
config.setServiceInfo(srv, {}, function(err, res){
if(err)
return console.log(err);
config.addServicePeer(srv, msg.node, {socket: msg.services[srv]}, function(err, res){
if(err)
return;
mnb_start_service(srv, function(err, res){
if(err)
return console.log(err);
});
});
});
}
}
}
/**
* Send the reply to the request sender
* @param string brokerId sender socket id
* @param int reqId sender request id
* @param object err
* @param object res
*/
function reqCallback(brokerId, reqId, err, res){
self._socket.send([brokerId, utils.stringify({'reqId': reqId, 'err': err, 'res': res})]);
}
/**
* Check if the message is a request
* @param object msg message
* @returns boolean
*/
var isReq = function(msg){
return msg.req ? true : false;
}
/**
* Broker boot actions
* @param string brokerId
*/
var handleBoot = function(brokerId){
//console.log(config.services['nlb'].peers)
config.setBrokerSocket(brokerId, function(err, brokerConfig){
if(err)
return console.log(err);
//console.log(brokerId, brokerConfig)
send(brokerId, lrp.REQ_CONFIG, brokerConfig, waitingReadyQueue[brokerId]);
})
}
/**
*
*/
var handleReady = function(brokerId){
reqCallback()
}
/** Return connection information for sending request to the specified
* service and send it to the broker.
* @param string service
*/
var getServiceConnectionInfo = function(broker_id, args){
if(!config.services[service] || !args['srv']){
socket_ctr.send([broker_id, comm.WRONG_REQ]);
return;
}
socket_ctr.send([broker_id, {
addr: config.services[service].config.lfa,
id: config.services[service].id
}]);
return;
}
var loadServiceInfo = function(callback){
var serviceConfig = utils.getConfigFromFileSync(process.argv[2]); //'./config/service' + process.argv[2] + '.json');
var count = 0;
for(var i in serviceConfig){
config.setServiceInfo(i, serviceConfig[i], function(err, res){
if(err)
return callback(err, null);
count++;
if(count == utils.length(serviceConfig)){
callback(null, count);
}
});
}
}
/* START UP SCRIPT */
var printHeader = function(){
str = '\n';
str += '__/\\\\\\______________/\\\\\\_____/\\\\\\\\\\\\\\\\\\\\\\____/\\\\\\________/\\\\\\__/\\\\\\\\\\\\\\\\\\\\\\\\\\___ ' + '\n';
str += '\\ _\\/\\\\\\_____________\\/\\\\\\___/\\\\\\/////////\\\\\\_\\/\\\\\\_______\\/\\\\\\_\\/\\\\\\/////////\\\\\\_ ' + '\n';
str += '\\\\ _\\/\\\\\\_____________\\/\\\\\\__\\//\\\\\\______\\///__\\/\\\\\\_______\\/\\\\\\_\\/\\\\\\_______\\/\\\\\\_ ' + '\n';
str += '\\\\\\ _\\//\\\\\\____/\\\\\\____/\\\\\\____\\////\\\\\\_________\\/\\\\\\_______\\/\\\\\\_\\/\\\\\\\\\\\\\\\\\\\\\\\\\\/__ ' + '\n';
str += '\\\\\\\\ __\\//\\\\\\__/\\\\\\\\\\__/\\\\\\________\\////\\\\\\______\\/\\\\\\_______\\/\\\\\\_\\/\\\\\\/////////____ ' + '\n';
str += '\\\\\\\\\\ ___\\//\\\\\\/\\\\\\/\\\\\\/\\\\\\____________\\////\\\\\\___\\/\\\\\\_______\\/\\\\\\_\\/\\\\\\_____________ ' + '\n';
str += '\\\\\\\\\\\\ ____\\//\\\\\\\\\\\\//\\\\\\\\\\\______/\\\\\\______\\//\\\\\\__\\//\\\\\\______/\\\\\\__\\/\\\\\\_____________ ' + '\n';
str += ' \\\\\\\\\\\\ _____\\//\\\\\\__\\//\\\\\\______\\///\\\\\\\\\\\\\\\\\\\\\\/____\\///\\\\\\\\\\\\\\\\\\/___\\/\\\\\\_____________ ' + '\n';
str += ' \\\\\\\\\\\\ ______\\///____\\///_________\\///////////________\\/////////_____\\///______________' + '\n';
str += ' \\\\\\\\\\\\ ________________________________________________________________________________\n';
str += ' \\\\\\\\\\\\_____________ __ _________________________________________ _ _______________\n';
str += ' \\\\\\\\\\____________ / _| | | _______________\n';
str += ' \\\\\\\\____________ | |_ _ __ __ _ _ __ ___ _____ _____ _ __| | __ ____________\n';
str += ' \\\\\\____________ | _| \'__/ _` | \'_ ` _ \\ / _ \\ \\ /\\ / / _ \\| \'__| |/ / ____________\n';
str += ' \\\\____________ | | | | | (_| | | | | | | __/\\ V V / (_) | | | < ____________\n';
str += ' \\____________ |_| |_| \\__,_|_| |_| |_|\\___| \\_/\\_/ \\___/|_| |_|\\_\\ ____________\n\n';
console.log(str)
}
//TODO DELETE DEBUG ONLY
if(process.argv.length < 3){
console.log('Missing config file.');
process.exit();
}
printHeader();
mnb_init(function(err, res){
if(err)
console.log(err)
console.log('MN Broker ready at ' + config.mnb.controlAddress);
})