Class: Vmpooler::PoolManager

Inherits:
Object
  • Object
show all
Defined in:
lib/vmpooler/pool_manager.rb,
lib/vmpooler/providers/base.rb,
lib/vmpooler/providers/dummy.rb,
lib/vmpooler/generic_connection_pool.rb

Defined Under Namespace

Classes: GenericConnectionPool, Provider

Constant Summary collapse

CHECK_LOOP_DELAY_MIN_DEFAULT = 
5
CHECK_LOOP_DELAY_MAX_DEFAULT = 
60
CHECK_LOOP_DELAY_DECAY_DEFAULT = 
2.0

Instance Method Summary collapse

Constructor Details

#initialize(config, logger, redis_connection_pool, metrics) ⇒ PoolManager

Returns a new instance of PoolManager.



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
 
# File 'lib/vmpooler/pool_manager.rb', line 14

def initialize(config, logger, redis_connection_pool, metrics)
  $config = config

  # Load logger library
  $logger = logger

  # metrics logging handle
  $metrics = metrics

  # Redis connection pool
  @redis = redis_connection_pool

  # VM Provider objects
  $providers = Concurrent::Hash.new

  # Our thread-tracker object
  $threads = Concurrent::Hash.new

  # Pool mutex
  @reconfigure_pool = Concurrent::Hash.new

  @vm_mutex = Concurrent::Hash.new

  # Name generator for generating host names
  @name_generator = Spicy::Proton.new

  # load specified providers from config file
  load_used_providers
end

Instance Method Details

#_check_disk_queue ⇒ Object 



677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
 
# File 'lib/vmpooler/pool_manager.rb', line 677

def _check_disk_queue
  @redis.with_metrics do |redis|
    task_detail = redis.spop('vmpooler__tasks__disk')
    unless task_detail.nil?
      begin
        vm_name, disk_size = task_detail.split(':')
        pool_name = get_pool_name_for_vm(vm_name, redis)
        raise("Unable to determine which pool #{vm_name} is a member of") if pool_name.nil?

        provider = get_provider_for_pool(pool_name)
        raise("Missing Provider for vm #{vm_name} in pool #{pool_name}") if provider.nil?

        create_vm_disk(pool_name, vm_name, disk_size, provider)
      rescue StandardError => e
        $logger.log('s', "[!] [disk_manager] disk creation appears to have failed: #{e}")
      end
    end
  end
end

#_check_ondemand_requests(maxloop = 0, loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT, loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT, loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT) ⇒ Object 



1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
 
# File 'lib/vmpooler/pool_manager.rb', line 1382

def _check_ondemand_requests(maxloop = 0,
                             loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT,
                             loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT,
                             loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT)

  loop_delay_min = $config[:config]['check_loop_delay_min'] unless $config[:config]['check_loop_delay_min'].nil?
  loop_delay_max = $config[:config]['check_loop_delay_max'] unless $config[:config]['check_loop_delay_max'].nil?
  loop_delay_decay = $config[:config]['check_loop_delay_decay'] unless $config[:config]['check_loop_delay_decay'].nil?

  loop_delay_decay = 2.0 if loop_delay_decay <= 1.0
  loop_delay_max = loop_delay_min if loop_delay_max.nil? || loop_delay_max < loop_delay_min

  loop_count = 1
  loop_delay = loop_delay_min

  loop do
    result = process_ondemand_requests

    loop_delay = (loop_delay * loop_delay_decay).to_i
    loop_delay = loop_delay_min if result > 0
    loop_delay = loop_delay_max if loop_delay > loop_delay_max
    sleep_with_wakeup_events(loop_delay, loop_delay_min, ondemand_request: true)

    unless maxloop == 0
      break if loop_count >= maxloop

      loop_count += 1
    end
  end
end

#_check_pending_vm(vm, pool, timeout, provider) ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
 
# File 'lib/vmpooler/pool_manager.rb', line 90

def _check_pending_vm(vm, pool, timeout, provider)
  mutex = vm_mutex(vm)
  return if mutex.locked?

  mutex.synchronize do
    @redis.with_metrics do |redis|
      request_id = redis.hget("vmpooler__vm__#{vm}", 'request_id')
      if provider.vm_ready?(pool, vm)
        move_pending_vm_to_ready(vm, pool, redis, request_id)
      else
        fail_pending_vm(vm, pool, timeout, redis)
      end
    end
  end
end

#_check_pool(pool, provider) ⇒ Object 



1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
 
# File 'lib/vmpooler/pool_manager.rb', line 1295

def _check_pool(pool, provider)
  pool_check_response = {
    discovered_vms: 0,
    checked_running_vms: 0,
    checked_ready_vms: 0,
    checked_pending_vms: 0,
    destroyed_vms: 0,
    migrated_vms: 0,
    cloned_vms: 0
  }

  begin
    inventory = create_inventory(pool, provider, pool_check_response)
  rescue StandardError
    return(pool_check_response)
  end

  check_running_pool_vms(pool['name'], provider, pool_check_response, inventory)

  check_ready_pool_vms(pool['name'], provider, pool_check_response, inventory, pool['ready_ttl'] || $config[:config]['ready_ttl'])

  check_pending_pool_vms(pool['name'], provider, pool_check_response, inventory, pool['timeout'])

  check_completed_pool_vms(pool['name'], provider, pool_check_response, inventory)

  check_discovered_pool_vms(pool['name'])

  check_migrating_pool_vms(pool['name'], provider, pool_check_response, inventory)

  # UPDATE TEMPLATE
  # Evaluates a pool template to ensure templates are prepared adequately for the configured provider
  # If a pool template configuration change is detected then template preparation is repeated for the new template
  # Additionally, a pool will drain ready and pending instances
  evaluate_template(pool, provider)

  # Check to see if a pool size change has been made via the configuration API
  # Since check_pool runs in a loop it does not
  # otherwise identify this change when running
  update_pool_size(pool)

  # Check to see if a pool size change has been made via the configuration API
  # Additionally, a pool will drain ready and pending instances
  update_clone_target(pool)

  repopulate_pool_vms(pool['name'], provider, pool_check_response, pool['size'])

  # Remove VMs in excess of the configured pool size
  remove_excess_vms(pool)

  # Reset a pool when poolreset is requested from the API
  reset_pool(pool)

  # Undo overrides submitted via the api
  undo_override(pool, provider)

  pool_check_response
end

#_check_ready_vm(vm, pool_name, ttl, provider) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 200

def _check_ready_vm(vm, pool_name, ttl, provider)
  # Periodically check that the VM is available
  mutex = vm_mutex(vm)
  return if mutex.locked?

  mutex.synchronize do
    @redis.with_metrics do |redis|
      check_stamp = redis.hget("vmpooler__vm__#{vm}", 'check')
      last_checked_too_soon = ((Time.now - Time.parse(check_stamp)).to_i < $config[:config]['vm_checktime'] * 60) if check_stamp
      break if check_stamp && last_checked_too_soon

      redis.hset("vmpooler__vm__#{vm}", 'check', Time.now)
      # Check if the hosts TTL has expired
      # if 'boottime' is nil, set bootime to beginning of unix epoch, forces TTL to be assumed expired
      boottime = redis.hget("vmpooler__vm__#{vm}", 'ready')
      if boottime
        boottime = Time.parse(boottime)
      else
        boottime = Time.at(0)
      end
      if (Time.now - boottime).to_i > ttl * 60
        redis.smove("vmpooler__ready__#{pool_name}", "vmpooler__completed__#{pool_name}", vm)

        $logger.log('d', "[!] [#{pool_name}] '#{vm}' reached end of TTL after #{ttl} minutes, removed from 'ready' queue")
        return nil
      end

      break if mismatched_hostname?(vm, pool_name, provider, redis)

      vm_still_ready?(pool_name, vm, provider, redis)
    end
  end
end

#_check_running_vm(vm, pool, ttl, provider) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 276

def _check_running_vm(vm, pool, ttl, provider)
  mutex = vm_mutex(vm)
  return if mutex.locked?

  mutex.synchronize do
    catch :stop_checking do
      @redis.with_metrics do |redis|
        # Check that VM is within defined lifetime
        checkouttime = redis.hget("vmpooler__active__#{pool}", vm)
        if checkouttime
          time_since_checkout = Time.now - Time.parse(checkouttime)
          running = time_since_checkout / 60 / 60

          if (ttl.to_i > 0) && (running.to_i >= ttl.to_i)
            move_vm_queue(pool, vm, 'running', 'completed', redis, "reached end of TTL after #{ttl} hours")
            throw :stop_checking
          end
        else
          move_vm_queue(pool, vm, 'running', 'completed', redis, 'is listed as running, but has no checkouttime data. Removing from running')
        end

        throw :stop_checking if provider.vm_ready?(pool, vm)

        throw :stop_checking if provider.get_vm(pool, vm)

        move_vm_queue(pool, vm, 'running', 'completed', redis, 'is no longer in inventory, removing from running')
      end
    end
  end
end

#_check_snapshot_queue ⇒ Object 



715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
 
# File 'lib/vmpooler/pool_manager.rb', line 715

def _check_snapshot_queue
  @redis.with_metrics do |redis|
    task_detail = redis.spop('vmpooler__tasks__snapshot')

    unless task_detail.nil?
      begin
        vm_name, snapshot_name = task_detail.split(':')
        pool_name = get_pool_name_for_vm(vm_name, redis)
        raise("Unable to determine which pool #{vm_name} is a member of") if pool_name.nil?

        provider = get_provider_for_pool(pool_name)
        raise("Missing Provider for vm #{vm_name} in pool #{pool_name}") if provider.nil?

        create_vm_snapshot(pool_name, vm_name, snapshot_name, provider)
      rescue StandardError => e
        $logger.log('s', "[!] [snapshot_manager] snapshot create appears to have failed: #{e}")
      end
    end

    task_detail = redis.spop('vmpooler__tasks__snapshot-revert')

    unless task_detail.nil?
      begin
        vm_name, snapshot_name = task_detail.split(':')
        pool_name = get_pool_name_for_vm(vm_name, redis)
        raise("Unable to determine which pool #{vm_name} is a member of") if pool_name.nil?

        provider = get_provider_for_pool(pool_name)
        raise("Missing Provider for vm #{vm_name} in pool #{pool_name}") if provider.nil?

        revert_vm_snapshot(pool_name, vm_name, snapshot_name, provider)
      rescue StandardError => e
        $logger.log('s', "[!] [snapshot_manager] snapshot revert appears to have failed: #{e}")
      end
    end
  end
end

#_clone_vm(pool_name, provider, request_id = nil, pool_alias = nil) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 392

def _clone_vm(pool_name, provider, request_id = nil, pool_alias = nil)
  new_vmname = find_unique_hostname(pool_name)
  mutex = vm_mutex(new_vmname)
  mutex.synchronize do
    @redis.with_metrics do |redis|
      # Add VM to Redis inventory ('pending' pool)
      redis.multi
      redis.sadd("vmpooler__pending__#{pool_name}", new_vmname)
      redis.hset("vmpooler__vm__#{new_vmname}", 'clone', Time.now)
      redis.hset("vmpooler__vm__#{new_vmname}", 'template', pool_name) # This value is used to represent the pool.
      redis.hset("vmpooler__vm__#{new_vmname}", 'pool', pool_name)
      redis.hset("vmpooler__vm__#{new_vmname}", 'request_id', request_id) if request_id
      redis.hset("vmpooler__vm__#{new_vmname}", 'pool_alias', pool_alias) if pool_alias
      redis.exec
    end

    begin
      $logger.log('d', "[ ] [#{pool_name}] Starting to clone '#{new_vmname}'")
      start = Time.now
      provider.create_vm(pool_name, new_vmname)
      finish = format('%<time>.2f', time: Time.now - start)

      @redis.with_metrics do |redis|
        redis.pipelined do
          redis.hset("vmpooler__clone__#{Date.today}", "#{pool_name}:#{new_vmname}", finish)
          redis.hset("vmpooler__vm__#{new_vmname}", 'clone_time', finish)
        end
      end
      $logger.log('s', "[+] [#{pool_name}] '#{new_vmname}' cloned in #{finish} seconds")

      $metrics.timing("clone.#{pool_name}", finish)
    rescue StandardError
      @redis.with_metrics do |redis|
        redis.pipelined do
          redis.srem("vmpooler__pending__#{pool_name}", new_vmname)
          expiration_ttl = $config[:redis]['data_ttl'].to_i * 60 * 60
          redis.expire("vmpooler__vm__#{new_vmname}", expiration_ttl)
        end
      end
      raise
    ensure
      @redis.with_metrics do |redis|
        redis.decr('vmpooler__tasks__ondemandclone') if request_id
        redis.decr('vmpooler__tasks__clone') unless request_id
      end
    end
  end
end

#_create_vm_disk(pool_name, vm_name, disk_size, provider) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 539

def _create_vm_disk(pool_name, vm_name, disk_size, provider)
  raise("Invalid disk size of '#{disk_size}' passed") if disk_size.nil? || disk_size.empty? || disk_size.to_i <= 0

  $logger.log('s', "[ ] [disk_manager] '#{vm_name}' is attaching a #{disk_size}gb disk")

  start = Time.now

  result = provider.create_disk(pool_name, vm_name, disk_size.to_i)

  finish = format('%<time>.2f', time: Time.now - start)

  if result
    @redis.with_metrics do |redis|
      rdisks = redis.hget("vmpooler__vm__#{vm_name}", 'disk')
      disks = rdisks ? rdisks.split(':') : []
      disks.push("+#{disk_size}gb")
      redis.hset("vmpooler__vm__#{vm_name}", 'disk', disks.join(':'))
    end

    $logger.log('s', "[+] [disk_manager] '#{vm_name}' attached #{disk_size}gb disk in #{finish} seconds")
  else
    $logger.log('s', "[+] [disk_manager] '#{vm_name}' failed to attach disk")
  end

  result
end

#_create_vm_snapshot(pool_name, vm_name, snapshot_name, provider) ⇒ Object 



577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
 
# File 'lib/vmpooler/pool_manager.rb', line 577

def _create_vm_snapshot(pool_name, vm_name, snapshot_name, provider)
  $logger.log('s', "[ ] [snapshot_manager] 'Attempting to snapshot #{vm_name} in pool #{pool_name}")
  start = Time.now

  result = provider.create_snapshot(pool_name, vm_name, snapshot_name)

  finish = format('%<time>.2f', time: Time.now - start)

  if result
    @redis.with_metrics do |redis|
      redis.hset("vmpooler__vm__#{vm_name}", "snapshot:#{snapshot_name}", Time.now.to_s)
    end
    $logger.log('s', "[+] [snapshot_manager] '#{vm_name}' snapshot created in #{finish} seconds")
  else
    $logger.log('s', "[+] [snapshot_manager] Failed to snapshot '#{vm_name}'")
  end

  result
end

#_destroy_vm(vm, pool, provider) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 453

def _destroy_vm(vm, pool, provider)
  mutex = vm_mutex(vm)
  return if mutex.locked?

  mutex.synchronize do
    @redis.with_metrics do |redis|
      redis.pipelined do
        redis.hdel("vmpooler__active__#{pool}", vm)
        redis.hset("vmpooler__vm__#{vm}", 'destroy', Time.now)

        # Auto-expire metadata key
        redis.expire("vmpooler__vm__#{vm}", ($config[:redis]['data_ttl'].to_i * 60 * 60))
      end

      start = Time.now

      provider.destroy_vm(pool, vm)

      redis.srem("vmpooler__completed__#{pool}", vm)

      finish = format('%<time>.2f', time: Time.now - start)
      $logger.log('s', "[-] [#{pool}] '#{vm}' destroyed in #{finish} seconds")
      $metrics.timing("destroy.#{pool}", finish)
    end
  end
  dereference_mutex(vm)
end

#_revert_vm_snapshot(pool_name, vm_name, snapshot_name, provider) ⇒ Object 



608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
 
# File 'lib/vmpooler/pool_manager.rb', line 608

def _revert_vm_snapshot(pool_name, vm_name, snapshot_name, provider)
  $logger.log('s', "[ ] [snapshot_manager] 'Attempting to revert #{vm_name}' in pool #{pool_name} to snapshot '#{snapshot_name}'")
  start = Time.now

  result = provider.revert_snapshot(pool_name, vm_name, snapshot_name)

  finish = format('%<time>.2f', time: Time.now - start)

  if result
    $logger.log('s', "[+] [snapshot_manager] '#{vm_name}' reverted to snapshot '#{snapshot_name}' in #{finish} seconds")
  else
    $logger.log('s', "[+] [snapshot_manager] Failed to revert #{vm_name}' in pool #{pool_name} to snapshot '#{snapshot_name}'")
  end

  result
end

#check_completed_pool_vms(pool_name, provider, pool_check_response, inventory) ⇒ Object 



1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
 
# File 'lib/vmpooler/pool_manager.rb', line 1197

def check_completed_pool_vms(pool_name, provider, pool_check_response, inventory)
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__completed__#{pool_name}").each do |vm|
      if inventory[vm]
        begin
          pool_check_response[:destroyed_vms] += 1
          destroy_vm(vm, pool_name, provider)
        rescue StandardError => e
          redis.pipelined do
            redis.srem("vmpooler__completed__#{pool_name}", vm)
            redis.hdel("vmpooler__active__#{pool_name}", vm)
            redis.del("vmpooler__vm__#{vm}")
          end
          $logger.log('d', "[!] [#{pool_name}] _check_pool failed with an error while evaluating completed VMs: #{e}")
        end
      else
        $logger.log('s', "[!] [#{pool_name}] '#{vm}' not found in inventory, removed from 'completed' queue")
        redis.pipelined do
          redis.srem("vmpooler__completed__#{pool_name}", vm)
          redis.hdel("vmpooler__active__#{pool_name}", vm)
          redis.del("vmpooler__vm__#{vm}")
        end
      end
    end
  end
end

#check_discovered_pool_vms(pool_name) ⇒ Object 



1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
 
# File 'lib/vmpooler/pool_manager.rb', line 1224

def check_discovered_pool_vms(pool_name)
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__discovered__#{pool_name}").reverse.each do |vm|
      %w[pending ready running completed].each do |queue|
        if redis.sismember("vmpooler__#{queue}__#{pool_name}", vm)
          $logger.log('d', "[!] [#{pool_name}] '#{vm}' found in '#{queue}', removed from 'discovered' queue")
          redis.srem("vmpooler__discovered__#{pool_name}", vm)
        end
      end

      redis.smove("vmpooler__discovered__#{pool_name}", "vmpooler__completed__#{pool_name}", vm) if redis.sismember("vmpooler__discovered__#{pool_name}", vm)
    end
  end
rescue StandardError => e
  $logger.log('d', "[!] [#{pool_name}] _check_pool failed with an error while evaluating discovered VMs: #{e}")
end

#check_disk_queue(maxloop = 0, loop_delay = 5) ⇒ Object 



659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
 
# File 'lib/vmpooler/pool_manager.rb', line 659

def check_disk_queue(maxloop = 0, loop_delay = 5)
  $logger.log('d', '[*] [disk_manager] starting worker thread')

  $threads['disk_manager'] = Thread.new do
    loop_count = 1
    loop do
      _check_disk_queue
      sleep(loop_delay)

      unless maxloop == 0
        break if loop_count >= maxloop

        loop_count += 1
      end
    end
  end
end

#check_dns_available(vm_name, domain = nil) ⇒ Object 



378
379
380
381
382
383
384
385
386
387
388
389
390
 
# File 'lib/vmpooler/pool_manager.rb', line 378

def check_dns_available(vm_name, domain = nil)
  # Query the DNS for the name we want to create and if it already exists, mark it unavailable
  # This protects against stale DNS records
  vm_name = "#{vm_name}.#{domain}" if domain
  begin
    dns_ip = Resolv.getaddress(vm_name)
  rescue Resolv::ResolvError
    # this is the expected case, swallow the error
    # eg "no address for blah-daisy"
    return ['', true]
  end
  [dns_ip, false]
end

#check_migrating_pool_vms(pool_name, provider, pool_check_response, inventory) ⇒ Object 



1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
 
# File 'lib/vmpooler/pool_manager.rb', line 1241

def check_migrating_pool_vms(pool_name, provider, pool_check_response, inventory)
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__migrating__#{pool_name}").reverse.each do |vm|
      if inventory[vm]
        begin
          pool_check_response[:migrated_vms] += 1
          migrate_vm(vm, pool_name, provider)
        rescue StandardError => e
          $logger.log('s', "[x] [#{pool_name}] '#{vm}' failed to migrate: #{e}")
        end
      end
    end
  end
end

#check_ondemand_request_ready(request_id, redis, score = nil) ⇒ Object 



1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
 
# File 'lib/vmpooler/pool_manager.rb', line 1497

def check_ondemand_request_ready(request_id, redis, score = nil)
  # default expiration is one month to ensure the data does not stay in redis forever
  default_expiration = 259_200_0
  processing_key = 'vmpooler__provisioning__processing'
  ondemand_hash_key = "vmpooler__odrequest__#{request_id}"
  score ||= redis.zscore(processing_key, request_id)
  return if request_expired?(request_id, score, redis)

  return unless vms_ready?(request_id, redis)

  redis.multi
  redis.hset(ondemand_hash_key, 'status', 'ready')
  redis.expire(ondemand_hash_key, default_expiration)
  redis.zrem(processing_key, request_id)
  redis.exec
end

#check_ondemand_requests(maxloop = 0, loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT, loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT, loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT) ⇒ Object 



1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
 
# File 'lib/vmpooler/pool_manager.rb', line 1370

def check_ondemand_requests(maxloop = 0,
                            loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT,
                            loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT,
                            loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT)

  $logger.log('d', '[*] [ondemand_provisioner] starting worker thread')

  $threads['ondemand_provisioner'] = Thread.new do
    _check_ondemand_requests(maxloop, loop_delay_min, loop_delay_max, loop_delay_decay)
  end
end

#check_ondemand_requests_ready(redis) ⇒ Object 



1489
1490
1491
1492
1493
1494
1495
 
# File 'lib/vmpooler/pool_manager.rb', line 1489

def check_ondemand_requests_ready(redis)
  in_progress_requests = redis.zrange('vmpooler__provisioning__processing', 0, -1, with_scores: true)
  in_progress_requests&.each do |request_id, score|
    check_ondemand_request_ready(request_id, redis, score)
  end
  in_progress_requests.length
end

#check_pending_pool_vms(pool_name, provider, pool_check_response, inventory, pool_timeout) ⇒ Object 



1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
 
# File 'lib/vmpooler/pool_manager.rb', line 1179

def check_pending_pool_vms(pool_name, provider, pool_check_response, inventory, pool_timeout)
  pool_timeout ||= $config[:config]['timeout'] || 15
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__pending__#{pool_name}").reverse.each do |vm|
      if inventory[vm]
        begin
          pool_check_response[:checked_pending_vms] += 1
          check_pending_vm(vm, pool_name, pool_timeout, provider)
        rescue StandardError => e
          $logger.log('d', "[!] [#{pool_name}] _check_pool failed with an error while evaluating pending VMs: #{e}")
        end
      else
        fail_pending_vm(vm, pool_name, pool_timeout, redis, exists: false)
      end
    end
  end
end

#check_pending_vm(vm, pool, timeout, provider) ⇒ Object

Check the state of a VM



76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/vmpooler/pool_manager.rb', line 76

def check_pending_vm(vm, pool, timeout, provider)
  Thread.new do
    begin
      _check_pending_vm(vm, pool, timeout, provider)
    rescue StandardError => e
      $logger.log('s', "[!] [#{pool}] '#{vm}' #{timeout} #{provider} errored while checking a pending vm : #{e}")
      @redis.with_metrics do |redis|
        fail_pending_vm(vm, pool, timeout, redis)
      end
      raise
    end
  end
end

#check_pool(pool, maxloop = 0, loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT, loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT, loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT) ⇒ Object 



860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
 
# File 'lib/vmpooler/pool_manager.rb', line 860

def check_pool(pool,
               maxloop = 0,
               loop_delay_min = CHECK_LOOP_DELAY_MIN_DEFAULT,
               loop_delay_max = CHECK_LOOP_DELAY_MAX_DEFAULT,
               loop_delay_decay = CHECK_LOOP_DELAY_DECAY_DEFAULT)
  $logger.log('d', "[*] [#{pool['name']}] starting worker thread")

  # Use the pool setings if they exist
  loop_delay_min = pool['check_loop_delay_min'] unless pool['check_loop_delay_min'].nil?
  loop_delay_max = pool['check_loop_delay_max'] unless pool['check_loop_delay_max'].nil?
  loop_delay_decay = pool['check_loop_delay_decay'] unless pool['check_loop_delay_decay'].nil?

  loop_delay_decay = 2.0 if loop_delay_decay <= 1.0
  loop_delay_max = loop_delay_min if loop_delay_max.nil? || loop_delay_max < loop_delay_min

  $threads[pool['name']] = Thread.new do
    begin
      loop_count = 1
      loop_delay = loop_delay_min
      provider = get_provider_for_pool(pool['name'])
      raise("Could not find provider '#{pool['provider']}") if provider.nil?

      sync_pool_template(pool)
      loop do
        result = _check_pool(pool, provider)

        if result[:cloned_vms] > 0 || result[:checked_pending_vms] > 0 || result[:discovered_vms] > 0
          loop_delay = loop_delay_min
        else
          loop_delay = (loop_delay * loop_delay_decay).to_i
          loop_delay = loop_delay_max if loop_delay > loop_delay_max
        end
        sleep_with_wakeup_events(loop_delay, loop_delay_min, pool_size_change: true, poolname: pool['name'], pool_template_change: true, clone_target_change: true, pending_vm: true, pool_reset: true, undo_override: true)

        unless maxloop == 0
          break if loop_count >= maxloop

          loop_count += 1
        end
      end
    rescue Redis::CannotConnectError
      raise
    rescue StandardError => e
      $logger.log('s', "[!] [#{pool['name']}] Error while checking the pool: #{e}")
      raise
    end
  end
end

#check_ready_pool_vms(pool_name, provider, pool_check_response, inventory, pool_ttl) ⇒ Object 



1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
 
# File 'lib/vmpooler/pool_manager.rb', line 1162

def check_ready_pool_vms(pool_name, provider, pool_check_response, inventory, pool_ttl)
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__ready__#{pool_name}").each do |vm|
      if inventory[vm]
        begin
          pool_check_response[:checked_ready_vms] += 1
          check_ready_vm(vm, pool_name, pool_ttl, provider)
        rescue StandardError => e
          $logger.log('d', "[!] [#{pool_name}] _check_pool failed with an error while evaluating ready VMs: #{e}")
        end
      else
        move_vm_queue(pool_name, vm, 'ready', 'completed', redis, 'is a ready VM but is missing from inventory.  Marking as completed.')
      end
    end
  end
end

#check_ready_vm(vm, pool_name, ttl, provider) ⇒ Object 



189
190
191
192
193
194
195
196
197
198
 
# File 'lib/vmpooler/pool_manager.rb', line 189

def check_ready_vm(vm, pool_name, ttl, provider)
  Thread.new do
    begin
      _check_ready_vm(vm, pool_name, ttl, provider)
    rescue StandardError => e
      $logger.log('s', "[!] [#{pool_name}] '#{vm}' failed while checking a ready vm : #{e}")
      raise
    end
  end
end

#check_running_pool_vms(pool_name, provider, pool_check_response, inventory) ⇒ Object 



1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
 
# File 'lib/vmpooler/pool_manager.rb', line 1144

def check_running_pool_vms(pool_name, provider, pool_check_response, inventory)
  @redis.with_metrics do |redis|
    redis.smembers("vmpooler__running__#{pool_name}").each do |vm|
      if inventory[vm]
        begin
          vm_lifetime = redis.hget("vmpooler__vm__#{vm}", 'lifetime') || $config[:config]['vm_lifetime'] || 12
          pool_check_response[:checked_running_vms] += 1
          check_running_vm(vm, pool_name, vm_lifetime, provider)
        rescue StandardError => e
          $logger.log('d', "[!] [#{pool_name}] _check_pool with an error while evaluating running VMs: #{e}")
        end
      else
        move_vm_queue(pool_name, vm, 'running', 'completed', redis, 'is a running VM but is missing from inventory.  Marking as completed.')
      end
    end
  end
end

#check_running_vm(vm, pool, ttl, provider) ⇒ Object 



265
266
267
268
269
270
271
272
273
274
 
# File 'lib/vmpooler/pool_manager.rb', line 265

def check_running_vm(vm, pool, ttl, provider)
  Thread.new do
    begin
      _check_running_vm(vm, pool, ttl, provider)
    rescue StandardError => e
      $logger.log('s', "[!] [#{pool}] '#{vm}' failed while checking VM with an error: #{e}")
      raise
    end
  end
end

#check_snapshot_queue(maxloop = 0, loop_delay = 5) ⇒ Object 



697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
 
# File 'lib/vmpooler/pool_manager.rb', line 697

def check_snapshot_queue(maxloop = 0, loop_delay = 5)
  $logger.log('d', '[*] [snapshot_manager] starting worker thread')

  $threads['snapshot_manager'] = Thread.new do
    loop_count = 1
    loop do
      _check_snapshot_queue
      sleep(loop_delay)

      unless maxloop == 0
        break if loop_count >= maxloop

        loop_count += 1
      end
    end
  end
end

#clone_vm(pool_name, provider, request_id = nil, pool_alias = nil) ⇒ Object

Clone a VM



313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
 
# File 'lib/vmpooler/pool_manager.rb', line 313

def clone_vm(pool_name, provider, request_id = nil, pool_alias = nil)
  Thread.new do
    begin
      _clone_vm(pool_name, provider, request_id, pool_alias)
    rescue StandardError => e
      if request_id
        $logger.log('s', "[!] [#{pool_name}] failed while cloning VM for request #{request_id} with an error: #{e}")
        @redis.with_metrics do |redis|
          redis.zadd('vmpooler__odcreate__task', 1, "#{pool_alias}:#{pool_name}:1:#{request_id}")
        end
      else
        $logger.log('s', "[!] [#{pool_name}] failed while cloning VM with an error: #{e}")
      end
      raise
    end
  end
end

#config ⇒ Object 



44
45
46
 
# File 'lib/vmpooler/pool_manager.rb', line 44

def config
  $config
end

#create_inventory(pool, provider, pool_check_response) ⇒ Object 



1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
 
# File 'lib/vmpooler/pool_manager.rb', line 1113

def create_inventory(pool, provider, pool_check_response)
  inventory = {}
  begin
    mutex = pool_mutex(pool['name'])
    mutex.synchronize do
      @redis.with_metrics do |redis|
        provider.vms_in_pool(pool['name']).each do |vm|
          if !redis.sismember("vmpooler__running__#{pool['name']}", vm['name']) &&
             !redis.sismember("vmpooler__ready__#{pool['name']}", vm['name']) &&
             !redis.sismember("vmpooler__pending__#{pool['name']}", vm['name']) &&
             !redis.sismember("vmpooler__completed__#{pool['name']}", vm['name']) &&
             !redis.sismember("vmpooler__discovered__#{pool['name']}", vm['name']) &&
             !redis.sismember("vmpooler__migrating__#{pool['name']}", vm['name'])

            pool_check_response[:discovered_vms] += 1
            redis.sadd("vmpooler__discovered__#{pool['name']}", vm['name'])

            $logger.log('s', "[?] [#{pool['name']}] '#{vm['name']}' added to 'discovered' queue")
          end

          inventory[vm['name']] = 1
        end
      end
    end
  rescue StandardError => e
    $logger.log('s', "[!] [#{pool['name']}] _check_pool failed with an error while running create_inventory: #{e}")
    raise(e)
  end
  inventory
end

#create_ondemand_vms(request_id, redis) ⇒ Object 



1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
 
# File 'lib/vmpooler/pool_manager.rb', line 1423

def create_ondemand_vms(request_id, redis)
  requested = redis.hget("vmpooler__odrequest__#{request_id}", 'requested')
  unless requested
    $logger.log('s', "Failed to find odrequest for request_id '#{request_id}'")
    redis.zrem('vmpooler__provisioning__request', request_id)
    return
  end
  score = redis.zscore('vmpooler__provisioning__request', request_id)
  requested = requested.split(',')

  redis.pipelined do
    requested.each do |request|
      redis.zadd('vmpooler__odcreate__task', Time.now.to_i, "#{request}:#{request_id}")
    end
    redis.zrem('vmpooler__provisioning__request', request_id)
    redis.zadd('vmpooler__provisioning__processing', score, request_id)
  end
end

#create_provider_object(config, logger, metrics, redis_connection_pool, provider_class, provider_name, options) ⇒ Object

Create a provider object, usually based on the providers/*.rb class, that implements providers/base.rb provider_class: Needs to match a class in the Vmpooler::PoolManager::Provider namespace. This is

either as a gem in the LOADPATH or in providers/*.rb ie Vmpooler::PoolManager::Provider::X

provider_name: Should be a unique provider name

returns an object Vmpooler::PoolManager::Provider::* or raises an error if the class does not exist



1360
1361
1362
1363
1364
1365
1366
1367
1368
 
# File 'lib/vmpooler/pool_manager.rb', line 1360

def create_provider_object(config, logger, metrics, redis_connection_pool, provider_class, provider_name, options)
  provider_klass = Vmpooler::PoolManager::Provider
  provider_klass.constants.each do |classname|
    next unless classname.to_s.casecmp(provider_class) == 0

    return provider_klass.const_get(classname).new(config, logger, metrics, redis_connection_pool, provider_name, options)
  end
  raise("Provider '#{provider_class}' is unknown for pool with provider name '#{provider_name}'") if provider.nil?
end

#create_vm_disk(pool_name, vm, disk_size, provider) ⇒ Object 



528
529
530
531
532
533
534
535
536
537
 
# File 'lib/vmpooler/pool_manager.rb', line 528

def create_vm_disk(pool_name, vm, disk_size, provider)
  Thread.new do
    begin
      _create_vm_disk(pool_name, vm, disk_size, provider)
    rescue StandardError => e
      $logger.log('d', "[!] [#{pool_name}] '#{vm}' failed while creating disk: #{e}")
      raise
    end
  end
end

#create_vm_snapshot(pool_name, vm, snapshot_name, provider) ⇒ Object 



566
567
568
569
570
571
572
573
574
575
 
# File 'lib/vmpooler/pool_manager.rb', line 566

def create_vm_snapshot(pool_name, vm, snapshot_name, provider)
  Thread.new do
    begin
      _create_vm_snapshot(pool_name, vm, snapshot_name, provider)
    rescue StandardError => e
      $logger.log('d', "[!] [#{pool_name}] '#{vm}' failed while creating snapshot: #{e}")
      raise
    end
  end
end

#default_providers ⇒ Array

note: vsphere is the default if user does not specify although this should not be if vsphere is to no longer be loaded by default please remove

Returns:

  • (Array) —

    • returns a list of providers that should always be loaded



640
641
642
 
# File 'lib/vmpooler/pool_manager.rb', line 640

def default_providers
  @default_providers ||= %w[dummy]
end

#dereference_mutex(vmname) ⇒ Object 



917
918
919
 
# File 'lib/vmpooler/pool_manager.rb', line 917

def dereference_mutex(vmname)
  true if @vm_mutex.delete(vmname)
end

#destroy_vm(vm, pool, provider) ⇒ Object

Destroy a VM



442
443
444
445
446
447
448
449
450
451
 
# File 'lib/vmpooler/pool_manager.rb', line 442

def destroy_vm(vm, pool, provider)
  Thread.new do
    begin
      _destroy_vm(vm, pool, provider)
    rescue StandardError => e
      $logger.log('d', "[!] [#{pool}] '#{vm}' failed while destroying the VM with an error: #{e}")
      raise
    end
  end
end

#drain_pool(poolname, redis) ⇒ Object 



972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
 
# File 'lib/vmpooler/pool_manager.rb', line 972

def drain_pool(poolname, redis)
  # Clear a pool of ready and pending instances
  if redis.scard("vmpooler__ready__#{poolname}") > 0
    $logger.log('s', "[*] [#{poolname}] removing ready instances")
    redis.smembers("vmpooler__ready__#{poolname}").each do |vm|
      move_vm_queue(poolname, vm, 'ready', 'completed', redis)
    end
  end
  if redis.scard("vmpooler__pending__#{poolname}") > 0
    $logger.log('s', "[*] [#{poolname}] removing pending instances")
    redis.smembers("vmpooler__pending__#{poolname}").each do |vm|
      move_vm_queue(poolname, vm, 'pending', 'completed', redis)
    end
  end
end

#evaluate_template(pool, provider) ⇒ Object 



940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
 
# File 'lib/vmpooler/pool_manager.rb', line 940

def evaluate_template(pool, provider)
  mutex = pool_mutex(pool['name'])
  return if mutex.locked?

  catch :update_not_needed do
    @redis.with_metrics do |redis|
      prepared_template = redis.hget('vmpooler__template__prepared', pool['name'])
      configured_template = redis.hget('vmpooler__config__template', pool['name'])

      if prepared_template.nil?
        mutex.synchronize do
          prepare_template(pool, provider, redis)
          prepared_template = redis.hget('vmpooler__template__prepared', pool['name'])
        end
      elsif prepared_template != pool['template']
        if configured_template.nil?
          mutex.synchronize do
            prepare_template(pool, provider, redis)
            prepared_template = redis.hget('vmpooler__template__prepared', pool['name'])
          end
        end
      end
      throw :update_not_needed if configured_template.nil?
      throw :update_not_needed if configured_template == prepared_template

      mutex.synchronize do
        update_pool_template(pool, provider, configured_template, prepared_template, redis)
      end
    end
  end
end

#execute!(maxloop = 0, loop_delay = 1) ⇒ Object 



1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
 
# File 'lib/vmpooler/pool_manager.rb', line 1543

def execute!(maxloop = 0, loop_delay = 1)
  $logger.log('d', 'starting vmpooler')

  @redis.with_metrics do |redis|
    # Clear out the tasks manager, as we don't know about any tasks at this point
    redis.set('vmpooler__tasks__clone', 0)
    redis.set('vmpooler__tasks__ondemandclone', 0)
    # Clear out vmpooler__migrations since stale entries may be left after a restart
    redis.del('vmpooler__migration')
  end

  # Copy vSphere settings to correct location.  This happens with older configuration files
  if !$config[:vsphere].nil? && ($config[:providers].nil? || $config[:providers][:vsphere].nil?)
    $logger.log('d', "[!] Detected an older configuration file. Copying the settings from ':vsphere:' to ':providers:/:vsphere:'")
    $config[:providers] = {} if $config[:providers].nil?
    $config[:providers][:vsphere] = $config[:vsphere]
  end

  # Set default provider for all pools that do not have one defined
  $config[:pools].each do |pool|
    if pool['provider'].nil?
      $logger.log('d', "[!] Setting provider for pool '#{pool['name']}' to 'dummy' as default")
      pool['provider'] = 'dummy'
    end
  end

  # Load running pool configuration into redis so API server can retrieve it
  load_pools_to_redis

  # Get pool loop settings
  $config[:config] = {} if $config[:config].nil?
  check_loop_delay_min = $config[:config]['check_loop_delay_min'] || CHECK_LOOP_DELAY_MIN_DEFAULT
  check_loop_delay_max = $config[:config]['check_loop_delay_max'] || CHECK_LOOP_DELAY_MAX_DEFAULT
  check_loop_delay_decay = $config[:config]['check_loop_delay_decay'] || CHECK_LOOP_DELAY_DECAY_DEFAULT

  # Create the providers
  $config[:pools].each do |pool|
    provider_name = pool['provider']
    # The provider_class parameter can be defined in the provider's data eg
    #:providers:
    # :vsphere:
    #  provider_class: 'vsphere'
    # :another-vsphere:
    #  provider_class: 'vsphere'
    # the above would create two providers/vsphere.rb class objects named 'vsphere' and 'another-vsphere'
    # each pools would then define which provider definition to use: vsphere or another-vsphere
    #
    # if provider_class is not defined it will try to use the provider_name as the class, this is to be
    # backwards compatible for example when there is only one provider listed
    # :providers:
    #  :dummy:
    #   filename: 'db.txs'
    # the above example would create an object based on the class providers/dummy.rb
    if $config[:providers].nil? || $config[:providers][provider_name.to_sym].nil? || $config[:providers][provider_name.to_sym]['provider_class'].nil?
      provider_class = provider_name
    else
      provider_class = $config[:providers][provider_name.to_sym]['provider_class']
    end
    begin
      $providers[provider_name] = create_provider_object($config, $logger, $metrics, @redis, provider_class, provider_name, {}) if $providers[provider_name].nil?
    rescue StandardError => e
      $logger.log('s', "Error while creating provider for pool #{pool['name']}: #{e}")
      raise
    end
  end

  purge_unused_vms_and_folders

  loop_count = 1
  loop do
    if !$threads['disk_manager']
      check_disk_queue
    elsif !$threads['disk_manager'].alive?
      $logger.log('d', '[!] [disk_manager] worker thread died, restarting')
      check_disk_queue
    end

    if !$threads['snapshot_manager']
      check_snapshot_queue
    elsif !$threads['snapshot_manager'].alive?
      $logger.log('d', '[!] [snapshot_manager] worker thread died, restarting')
      check_snapshot_queue
    end

    $config[:pools].each do |pool|
      if !$threads[pool['name']]
        check_pool(pool)
      elsif !$threads[pool['name']].alive?
        $logger.log('d', "[!] [#{pool['name']}] worker thread died, restarting")
        check_pool(pool, check_loop_delay_min, check_loop_delay_max, check_loop_delay_decay)
      end
    end

    if !$threads['ondemand_provisioner']
      check_ondemand_requests
    elsif !$threads['ondemand_provisioner'].alive?
      $logger.log('d', '[!] [ondemand_provisioner] worker thread died, restarting')
      check_ondemand_requests(check_loop_delay_min, check_loop_delay_max, check_loop_delay_decay)
    end

    sleep(loop_delay)

    unless maxloop == 0
      break if loop_count >= maxloop

      loop_count += 1
    end
  end
rescue Redis::CannotConnectError => e
  $logger.log('s', "Cannot connect to the redis server: #{e}")
  raise
end

#fail_pending_vm(vm, pool, timeout, redis, exists: true) ⇒ Object 



111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
 
# File 'lib/vmpooler/pool_manager.rb', line 111

def fail_pending_vm(vm, pool, timeout, redis, exists: true)
  clone_stamp = redis.hget("vmpooler__vm__#{vm}", 'clone')

  time_since_clone = (Time.now - Time.parse(clone_stamp)) / 60
  if time_since_clone > timeout
    if exists
      request_id = redis.hget("vmpooler__vm__#{vm}", 'request_id')
      pool_alias = redis.hget("vmpooler__vm__#{vm}", 'pool_alias') if request_id
      redis.multi
      redis.smove("vmpooler__pending__#{pool}", "vmpooler__completed__#{pool}", vm)
      redis.zadd('vmpooler__odcreate__task', 1, "#{pool_alias}:#{pool}:1:#{request_id}") if request_id
      redis.exec
      $metrics.increment("errors.markedasfailed.#{pool}")
      $logger.log('d', "[!] [#{pool}] '#{vm}' marked as 'failed' after #{timeout} minutes")
    else
      remove_nonexistent_vm(vm, pool, redis)
    end
  end
  true
rescue StandardError => e
  $logger.log('d', "Fail pending VM failed with an error: #{e}")
  false
end

#find_unique_hostname(pool_name) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 351

def find_unique_hostname(pool_name)
  # generate hostname that is not already in use in vmpooler
  # also check that no dns record already exists
  hostname_retries = 0
  max_hostname_retries = 3
  while hostname_retries < max_hostname_retries
    hostname, hostname_available = generate_and_check_hostname
    domain = $config[:config]['domain']
    dns_ip, dns_available = check_dns_available(hostname, domain)
    break if hostname_available && dns_available

    hostname_retries += 1

    if !hostname_available
      $metrics.increment("errors.duplicatehostname.#{pool_name}")
      $logger.log('s', "[!] [#{pool_name}] Generated hostname #{hostname} was not unique (attempt \##{hostname_retries} of #{max_hostname_retries})")
    elsif !dns_available
      $metrics.increment("errors.staledns.#{pool_name}")
      $logger.log('s', "[!] [#{pool_name}] Generated hostname #{hostname} already exists in DNS records (#{dns_ip}), stale DNS")
    end
  end

  raise "Unable to generate a unique hostname after #{hostname_retries} attempts. The last hostname checked was #{hostname}" unless hostname_available && dns_available

  hostname
end

#generate_and_check_hostname ⇒ Object 



331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
 
# File 'lib/vmpooler/pool_manager.rb', line 331

def generate_and_check_hostname
  # Generate a randomized hostname. The total name must no longer than 15
  # character including the hyphen. The shortest adjective in the corpus is
  # three characters long. Therefore, we can technically select a noun up to 11
  # characters long and still be guaranteed to have an available adjective.
  # Because of the limited set of 11 letter nouns and corresponding 3
  # letter adjectives, we actually limit the noun to 10 letters to avoid
  # inviting more conflicts. We favor selecting a longer noun rather than a
  # longer adjective because longer adjectives tend to be less fun.
  @redis.with do |redis|
    noun = @name_generator.noun(max: 10)
    adjective = @name_generator.adjective(max: 14 - noun.length)
    random_name = [adjective, noun].join('-')
    hostname = $config[:config]['prefix'] + random_name
    available = redis.hlen("vmpooler__vm__#{hostname}") == 0

    [hostname, available]
  end
end

#get_base_folders(folders) ⇒ Object 



512
513
514
515
516
517
518
 
# File 'lib/vmpooler/pool_manager.rb', line 512

def get_base_folders(folders)
  base = []
  folders.each do |_key, value|
    base << value
  end
  base.uniq
end

#get_pool_name_for_vm(vm_name, redis) ⇒ Object 



644
645
646
647
 
# File 'lib/vmpooler/pool_manager.rb', line 644

def get_pool_name_for_vm(vm_name, redis)
  # the 'template' is a bad name.  Should really be 'poolname'
  redis.hget("vmpooler__vm__#{vm_name}", 'template')
end

#get_provider_for_pool(pool_name) ⇒ Provider

Returns - returns the provider class Object.

Parameters:

  • pool_name (String) —

    • the name of the pool

Returns:

  • (Provider) —

    • returns the provider class Object



651
652
653
654
655
656
657
 
# File 'lib/vmpooler/pool_manager.rb', line 651

def get_provider_for_pool(pool_name)
  pool = $config[:pools].find { |p| p['name'] == pool_name }
  return nil unless pool

  provider_name = pool.fetch('provider', nil)
  $providers[provider_name]
end

#load_pools_to_redis ⇒ Object

Place pool configuration in redis so an API instance can discover running pool configuration



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
 
# File 'lib/vmpooler/pool_manager.rb', line 49

def load_pools_to_redis
  @redis.with_metrics do |redis|
    previously_configured_pools = redis.smembers('vmpooler__pools')
    currently_configured_pools = []
    config[:pools].each do |pool|
      currently_configured_pools << pool['name']
      redis.sadd('vmpooler__pools', pool['name'])
      pool_keys = pool.keys
      pool_keys.delete('alias')
      to_set = {}
      pool_keys.each do |k|
        to_set[k] = pool[k]
      end
      to_set['alias'] = pool['alias'].join(',') if to_set.key?('alias')
      redis.hmset("vmpooler__pool__#{pool['name']}", to_set.to_a.flatten) unless to_set.empty?
    end
    previously_configured_pools.each do |pool|
      unless currently_configured_pools.include? pool
        redis.srem('vmpooler__pools', pool)
        redis.del("vmpooler__pool__#{pool}")
      end
    end
  end
  nil
end

#load_used_providers ⇒ Object

load only providers used in config file



626
627
628
 
# File 'lib/vmpooler/pool_manager.rb', line 626

def load_used_providers
  Vmpooler::Providers.load_by_name(used_providers)
end

#migrate_vm(vm_name, pool_name, provider) ⇒ Object 



753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
 
# File 'lib/vmpooler/pool_manager.rb', line 753

def migrate_vm(vm_name, pool_name, provider)
  Thread.new do
    begin
      mutex = vm_mutex(vm_name)
      mutex.synchronize do
        @redis.with_metrics do |redis|
          redis.srem("vmpooler__migrating__#{pool_name}", vm_name)
        end
        provider.migrate_vm(pool_name, vm_name)
      end
    rescue StandardError => e
      $logger.log('s', "[x] [#{pool_name}] '#{vm_name}' migration failed with an error: #{e}")
    end
  end
end

#mismatched_hostname?(vm, pool_name, provider, redis) ⇒ Boolean

Returns:

  • (Boolean) 


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
 
# File 'lib/vmpooler/pool_manager.rb', line 234

def mismatched_hostname?(vm, pool_name, provider, redis)
  pool_config = $config[:pools][$config[:pool_index][pool_name]]
  check_hostname = pool_config['check_hostname_for_mismatch']
  check_hostname = $config[:config]['check_ready_vm_hostname_for_mismatch'] if check_hostname.nil?
  return if check_hostname == false

  # Wait one minute before checking a VM for hostname mismatch
  # When checking as soon as the VM passes the ready test the instance
  # often doesn't report its hostname yet causing the VM to be removed immediately
  vm_ready_time = redis.hget("vmpooler__vm__#{vm}", 'ready')
  if vm_ready_time
    wait_before_checking = 60
    time_since_ready = (Time.now - Time.parse(vm_ready_time)).to_i
    return unless time_since_ready > wait_before_checking
  end

  # Check if the hostname has magically changed from underneath Pooler
  vm_hash = provider.get_vm(pool_name, vm)
  return unless vm_hash.is_a? Hash

  hostname = vm_hash['hostname']

  return if hostname.nil?
  return if hostname.empty?
  return if hostname == vm

  redis.smove("vmpooler__ready__#{pool_name}", "vmpooler__completed__#{pool_name}", vm)
  $logger.log('d', "[!] [#{pool_name}] '#{vm}' has mismatched hostname #{hostname}, removed from 'ready' queue")
  true
end

#move_pending_vm_to_ready(vm, pool, redis, request_id = nil) ⇒ Object 



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
 
# File 'lib/vmpooler/pool_manager.rb', line 135

def move_pending_vm_to_ready(vm, pool, redis, request_id = nil)
  clone_time = redis.hget("vmpooler__vm__#{vm}", 'clone')
  finish = format('%<time>.2f', time: Time.now - Time.parse(clone_time))

  if request_id
    ondemandrequest_hash = redis.hgetall("vmpooler__odrequest__#{request_id}")
    case ondemandrequest_hash['status']
    when 'failed'
      move_vm_queue(pool, vm, 'pending', 'completed', redis, "moved to completed queue. '#{request_id}' could not be filled in time")
      return nil
    when 'deleted'
      move_vm_queue(pool, vm, 'pending', 'completed', redis, "moved to completed queue. '#{request_id}' has been deleted")
      return nil
    end
    pool_alias = redis.hget("vmpooler__vm__#{vm}", 'pool_alias')

    redis.pipelined do
      redis.hset("vmpooler__active__#{pool}", vm, Time.now)
      redis.hset("vmpooler__vm__#{vm}", 'checkout', Time.now)
      if ondemandrequest_hash['token:token']
        redis.hset("vmpooler__vm__#{vm}", 'token:token', ondemandrequest_hash['token:token'])
        redis.hset("vmpooler__vm__#{vm}", 'token:user', ondemandrequest_hash['token:user'])
        redis.hset("vmpooler__vm__#{vm}", 'lifetime', $config[:config]['vm_lifetime_auth'].to_i)
      end
      redis.sadd("vmpooler__#{request_id}__#{pool_alias}__#{pool}", vm)
    end
    move_vm_queue(pool, vm, 'pending', 'running', redis)
    check_ondemand_request_ready(request_id, redis)
  else
    redis.smove("vmpooler__pending__#{pool}", "vmpooler__ready__#{pool}", vm)
  end

  redis.pipelined do
    redis.hset("vmpooler__boot__#{Date.today}", "#{pool}:#{vm}", finish) # maybe remove as this is never used by vmpooler itself?
    redis.hset("vmpooler__vm__#{vm}", 'ready', Time.now)

    # last boot time is displayed in API, and used by alarming script
    redis.hset('vmpooler__lastboot', pool, Time.now)
  end

  $metrics.timing("time_to_ready_state.#{pool}", finish)
  $logger.log('s', "[>] [#{pool}] '#{vm}' moved from 'pending' to 'ready' queue") unless request_id
  $logger.log('s', "[>] [#{pool}] '#{vm}' is 'ready' for request '#{request_id}'") if request_id
end

#move_vm_queue(pool, vm, queue_from, queue_to, redis, msg = nil) ⇒ Object 



307
308
309
310
 
# File 'lib/vmpooler/pool_manager.rb', line 307

def move_vm_queue(pool, vm, queue_from, queue_to, redis, msg = nil)
  redis.smove("vmpooler__#{queue_from}__#{pool}", "vmpooler__#{queue_to}__#{pool}", vm)
  $logger.log('d', "[!] [#{pool}] '#{vm}' #{msg}") if msg
end

#pool_folders(provider_name) ⇒ Object

Return a list of pool folders



500
501
502
503
504
505
506
507
508
509
510
 
# File 'lib/vmpooler/pool_manager.rb', line 500

def pool_folders(provider_name)
  folders = {}
  $config[:pools].each do |pool|
    next unless pool['provider'] == provider_name.to_s

    folder_parts = pool['folder'].split('/')
    datacenter = $providers[provider_name.to_s].get_target_datacenter_from_config(pool['name'])
    folders[folder_parts.pop] = "#{datacenter}/vm/#{folder_parts.join('/')}"
  end
  folders
end

#pool_mutex(poolname) ⇒ Object 



909
910
911
 
# File 'lib/vmpooler/pool_manager.rb', line 909

def pool_mutex(poolname)
  @reconfigure_pool[poolname] || @reconfigure_pool[poolname] = Mutex.new
end

#prepare_template(pool, provider, redis) ⇒ Object 



928
929
930
931
932
933
934
935
936
937
938
 
# File 'lib/vmpooler/pool_manager.rb', line 928

def prepare_template(pool, provider, redis)
  if $config[:config]['create_template_delta_disks'] && !redis.sismember('vmpooler__template__deltas', pool['template'])
    begin
      provider.create_template_delta_disks(pool)
      redis.sadd('vmpooler__template__deltas', pool['template'])
    rescue StandardError => e
      $logger.log('s', "[!] [#{pool['name']}] failed while preparing a template with an error. As a result vmpooler could not create the template delta disks. Either a template delta disk already exists, or the template delta disk creation failed. The error is: #{e}")
    end
  end
  redis.hset('vmpooler__template__prepared', pool['name'], pool['template'])
end

#process_ondemand_requests ⇒ Object 



1413
1414
1415
1416
1417
1418
1419
1420
1421
 
# File 'lib/vmpooler/pool_manager.rb', line 1413

def process_ondemand_requests
  @redis.with_metrics do |redis|
    requests = redis.zrange('vmpooler__provisioning__request', 0, -1)
    requests&.map { |request_id| create_ondemand_vms(request_id, redis) }
    provisioning_tasks = process_ondemand_vms(redis)
    requests_ready = check_ondemand_requests_ready(redis)
    requests.length + provisioning_tasks + requests_ready
  end
end

#process_ondemand_vms(redis) ⇒ Object 



1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
 
# File 'lib/vmpooler/pool_manager.rb', line 1442

def process_ondemand_vms(redis)
  queue_key = 'vmpooler__odcreate__task'
  queue = redis.zrange(queue_key, 0, -1, with_scores: true)
  ondemand_clone_limit = $config[:config]['ondemand_clone_limit']
  queue.each do |request, score|
    clone_count = redis.get('vmpooler__tasks__ondemandclone').to_i
    break unless clone_count < ondemand_clone_limit

    pool_alias, pool, count, request_id = request.split(':')
    count = count.to_i
    provider = get_provider_for_pool(pool)
    slots = ondemand_clone_limit - clone_count
    break if slots == 0

    if slots >= count
      count.times do
        redis.incr('vmpooler__tasks__ondemandclone')
        clone_vm(pool, provider, request_id, pool_alias)
      end
      redis.zrem(queue_key, request)
    else
      remaining_count = count - slots
      slots.times do
        redis.incr('vmpooler__tasks__ondemandclone')
        clone_vm(pool, provider, request_id, pool_alias)
      end
      redis.pipelined do
        redis.zrem(queue_key, request)
        redis.zadd(queue_key, score, "#{pool_alias}:#{pool}:#{remaining_count}:#{request_id}")
      end
    end
  end
  queue.length
end

#purge_unused_vms_and_folders ⇒ Object 



481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
 
# File 'lib/vmpooler/pool_manager.rb', line 481

def purge_unused_vms_and_folders
  global_purge = $config[:config]['purge_unconfigured_folders']
  providers = $config[:providers].keys
  providers.each do |provider_key|
    provider_purge = $config[:providers][provider_key]['purge_unconfigured_folders'] || global_purge
    if provider_purge
      Thread.new do
        begin
          purge_vms_and_folders(provider_key)
        rescue StandardError => e
          $logger.log('s', "[!] failed while purging provider #{provider_key} VMs and folders with an error: #{e}")
        end
      end
    end
  end
  nil
end

#purge_vms_and_folders(provider_name) ⇒ Object 



520
521
522
523
524
525
526
 
# File 'lib/vmpooler/pool_manager.rb', line 520

def purge_vms_and_folders(provider_name)
  provider = $providers[provider_name.to_s]
  configured_folders = pool_folders(provider_name)
  base_folders = get_base_folders(configured_folders)
  whitelist = provider.provider_config['folder_whitelist']
  provider.purge_unconfigured_folders(base_folders, configured_folders, whitelist)
end

#remove_excess_vms(pool) ⇒ Object 



1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
 
# File 'lib/vmpooler/pool_manager.rb', line 1018

def remove_excess_vms(pool)
  @redis.with_metrics do |redis|
    redis.multi
    redis.scard("vmpooler__ready__#{pool['name']}")
    redis.scard("vmpooler__pending__#{pool['name']}")
    ready, pending = redis.exec
    total = pending.to_i + ready.to_i
    break if total.nil?
    break if total == 0

    mutex = pool_mutex(pool['name'])
    break if mutex.locked?
    break unless ready.to_i > pool['size']

    mutex.synchronize do
      difference = ready.to_i - pool['size']
      difference.times do
        next_vm = redis.spop("vmpooler__ready__#{pool['name']}")
        move_vm_queue(pool['name'], next_vm, 'ready', 'completed', redis)
      end
      if total > ready
        redis.smembers("vmpooler__pending__#{pool['name']}").each do |vm|
          move_vm_queue(pool['name'], vm, 'pending', 'completed', redis)
        end
      end
    end
  end
end

#remove_nonexistent_vm(vm, pool, redis) ⇒ Object 



106
107
108
109
 
# File 'lib/vmpooler/pool_manager.rb', line 106

def remove_nonexistent_vm(vm, pool, redis)
  redis.srem("vmpooler__pending__#{pool}", vm)
  $logger.log('d', "[!] [#{pool}] '#{vm}' no longer exists. Removing from pending.")
end

#remove_vms_for_failed_request(request_id, expiration_ttl, redis) ⇒ Object 



1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
 
# File 'lib/vmpooler/pool_manager.rb', line 1530

def remove_vms_for_failed_request(request_id, expiration_ttl, redis)
  request_hash = redis.hgetall("vmpooler__odrequest__#{request_id}")
  Parsing.get_platform_pool_count(request_hash['requested']) do |platform_alias, pool, _count|
    pools_filled = redis.smembers("vmpooler__#{request_id}__#{platform_alias}__#{pool}")
    redis.pipelined do
      pools_filled&.each do |vm|
        move_vm_queue(pool, vm, 'running', 'completed', redis, "moved to completed queue. '#{request_id}' could not be filled in time")
      end
      redis.expire("vmpooler__#{request_id}__#{platform_alias}__#{pool}", expiration_ttl)
    end
  end
end

#repopulate_pool_vms(pool_name, provider, pool_check_response, pool_size) ⇒ Object 



1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
 
# File 'lib/vmpooler/pool_manager.rb', line 1256

def repopulate_pool_vms(pool_name, provider, pool_check_response, pool_size)
  return if pool_mutex(pool_name).locked?

  @redis.with_metrics do |redis|
    redis.multi
    redis.scard("vmpooler__ready__#{pool_name}")
    redis.scard("vmpooler__pending__#{pool_name}")
    redis.scard("vmpooler__running__#{pool_name}")
    ready, pending, running = redis.exec
    total = pending.to_i + ready.to_i

    $metrics.gauge("ready.#{pool_name}", ready)
    $metrics.gauge("running.#{pool_name}", running)

    unless pool_size == 0
      if redis.get("vmpooler__empty__#{pool_name}")
        redis.del("vmpooler__empty__#{pool_name}") unless ready == 0
      elsif ready == 0
        redis.set("vmpooler__empty__#{pool_name}", 'true')
        $logger.log('s', "[!] [#{pool_name}] is empty")
      end
    end

    (pool_size - total.to_i).times do
      if redis.get('vmpooler__tasks__clone').to_i < $config[:config]['task_limit'].to_i
        begin
          redis.incr('vmpooler__tasks__clone')
          pool_check_response[:cloned_vms] += 1
          clone_vm(pool_name, provider)
        rescue StandardError => e
          $logger.log('s', "[!] [#{pool_name}] clone failed during check_pool with an error: #{e}")
          redis.decr('vmpooler__tasks__clone')
          raise
        end
      end
    end
  end
end

#request_expired?(request_id, score, redis) ⇒ Boolean

Returns:

  • (Boolean) 


1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
 
# File 'lib/vmpooler/pool_manager.rb', line 1514

def request_expired?(request_id, score, redis)
  delta = Time.now.to_i - score.to_i
  ondemand_request_ttl = $config[:config]['ondemand_request_ttl']
  return false unless delta > ondemand_request_ttl * 60

  $logger.log('s', "Ondemand request for '#{request_id}' failed to provision all instances within the configured ttl '#{ondemand_request_ttl}'")
  expiration_ttl = $config[:redis]['data_ttl'].to_i * 60 * 60
  redis.pipelined do
    redis.zrem('vmpooler__provisioning__processing', request_id)
    redis.hset("vmpooler__odrequest__#{request_id}", 'status', 'failed')
    redis.expire("vmpooler__odrequest__#{request_id}", expiration_ttl)
  end
  remove_vms_for_failed_request(request_id, expiration_ttl, redis)
  true
end

#reset_pool(pool) ⇒ Object 



1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
 
# File 'lib/vmpooler/pool_manager.rb', line 1067

def reset_pool(pool)
  poolname = pool['name']
  @redis.with_metrics do |redis|
    break unless redis.sismember('vmpooler__poolreset', poolname)

    redis.srem('vmpooler__poolreset', poolname)
    mutex = pool_mutex(poolname)
    mutex.synchronize do
      drain_pool(poolname, redis)
      $logger.log('s', "[*] [#{poolname}] reset has cleared ready and pending instances")
    end
  end
end

#revert_vm_snapshot(pool_name, vm, snapshot_name, provider) ⇒ Object 



597
598
599
600
601
602
603
604
605
606
 
# File 'lib/vmpooler/pool_manager.rb', line 597

def revert_vm_snapshot(pool_name, vm, snapshot_name, provider)
  Thread.new do
    begin
      _revert_vm_snapshot(pool_name, vm, snapshot_name, provider)
    rescue StandardError => e
      $logger.log('d', "[!] [#{pool_name}] '#{vm}' failed while reverting snapshot: #{e}")
      raise
    end
  end
end

#sleep_with_wakeup_events(loop_delay, wakeup_period = 5, options = {}) ⇒ Object

Possible wakeup events :pool_size_change

- Fires when the number of ready VMs changes due to being consumed.
- Additional options
    :poolname

:pool_template_change

- Fires when a template configuration update is requested
- Additional options
    :poolname

:pool_reset

- Fires when a pool reset is requested
- Additional options
    :poolname

:undo_override

- Fires when a pool override removal is requested
- Additional options
    :poolname



792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
 
# File 'lib/vmpooler/pool_manager.rb', line 792

def sleep_with_wakeup_events(loop_delay, wakeup_period = 5, options = {})
  exit_by = Time.now + loop_delay
  wakeup_by = Time.now + wakeup_period
  return if time_passed?(:exit_by, exit_by)

  @redis.with_metrics do |redis|
    initial_ready_size = redis.scard("vmpooler__ready__#{options[:poolname]}") if options[:pool_size_change]

    initial_clone_target = redis.hget("vmpooler__pool__#{options[:poolname]}", options[:clone_target]) if options[:clone_target_change]

    initial_template = redis.hget('vmpooler__template__prepared', options[:poolname]) if options[:pool_template_change]

    loop do
      sleep(1)
      break if time_passed?(:exit_by, exit_by)

      # Check for wakeup events
      if time_passed?(:wakeup_by, wakeup_by)
        wakeup_by = Time.now + wakeup_period

        # Wakeup if the number of ready VMs has changed
        if options[:pool_size_change]
          ready_size = redis.scard("vmpooler__ready__#{options[:poolname]}")
          break unless ready_size == initial_ready_size
        end

        if options[:clone_target_change]
          clone_target = redis.hget('vmpooler__config__clone_target}', options[:poolname])
          break if clone_target && clone_target != initial_clone_target
        end

        if options[:pool_template_change]
          configured_template = redis.hget('vmpooler__config__template', options[:poolname])
          break if configured_template && initial_template != configured_template
        end

        if options[:pool_reset]
          pending = redis.sismember('vmpooler__poolreset', options[:poolname])
          break if pending
        end

        if options[:undo_override]
          break if redis.sismember('vmpooler__pool__undo_template_override', options[:poolname])
          break if redis.sismember('vmpooler__pool__undo_size_override', options[:poolname])
        end

        if options[:pending_vm]
          pending_vm_count = redis.scard("vmpooler__pending__#{options[:poolname]}")
          break unless pending_vm_count == 0
        end

        if options[:ondemand_request]
          redis.multi
          redis.zcard('vmpooler__provisioning__request')
          redis.zcard('vmpooler__provisioning__processing')
          redis.zcard('vmpooler__odcreate__task')
          od_request, od_processing, od_createtask = redis.exec
          break unless od_request == 0
          break unless od_processing == 0
          break unless od_createtask == 0
        end
      end

      break if time_passed?(:exit_by, exit_by)
    end
  end
end

#sync_pool_template(pool) ⇒ Object 



921
922
923
924
925
926
 
# File 'lib/vmpooler/pool_manager.rb', line 921

def sync_pool_template(pool)
  @redis.with_metrics do |redis|
    pool_template = redis.hget('vmpooler__config__template', pool['name'])
    pool['template'] = pool_template if pool_template && pool['template'] != pool_template
  end
end

#time_passed?(_event, time) ⇒ Boolean

Helper method mainly used for unit testing

Returns:

  • (Boolean) 


770
771
772
 
# File 'lib/vmpooler/pool_manager.rb', line 770

def time_passed?(_event, time)
  Time.now > time
end

#undo_override(pool, provider) ⇒ Object 



1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
 
# File 'lib/vmpooler/pool_manager.rb', line 1081

def undo_override(pool, provider)
  poolname = pool['name']
  mutex = pool_mutex(poolname)
  return if mutex.locked?

  @redis.with_metrics do |redis|
    break unless redis.sismember('vmpooler__pool__undo_template_override', poolname)

    redis.srem('vmpooler__pool__undo_template_override', poolname)
    template_now = pool['template']
    template_original = $config[:pools_at_startup][$config[:pool_index][poolname]]['template']

    mutex.synchronize do
      update_pool_template(pool, provider, template_original, template_now, redis)
    end
  end

  @redis.with_metrics do |redis|
    break unless redis.sismember('vmpooler__pool__undo_size_override', poolname)

    redis.srem('vmpooler__pool__undo_size_override', poolname)
    pool_size_now = pool['size']
    pool_size_original = $config[:pools_at_startup][$config[:pool_index][poolname]]['size']

    mutex.synchronize do
      pool['size'] = pool_size_original
    end

    $logger.log('s', "[*] [#{poolname}] size updated from #{pool_size_now} to #{pool_size_original}")
  end
end

#update_clone_target(pool) ⇒ Object 



999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
 
# File 'lib/vmpooler/pool_manager.rb', line 999

def update_clone_target(pool)
  mutex = pool_mutex(pool['name'])
  return if mutex.locked?

  @redis.with_metrics do |redis|
    clone_target = redis.hget('vmpooler__config__clone_target', pool['name'])
    break if clone_target.nil?
    break if clone_target == pool['clone_target']

    $logger.log('s', "[*] [#{pool['name']}] clone updated from #{pool['clone_target']} to #{clone_target}")
    mutex.synchronize do
      pool['clone_target'] = clone_target
      # Remove all ready and pending VMs so new instances are created for the new clone_target
      drain_pool(pool['name'], redis)
    end
    $logger.log('s', "[*] [#{pool['name']}] is ready for use")
  end
end

#update_pool_size(pool) ⇒ Object 



1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
 
# File 'lib/vmpooler/pool_manager.rb', line 1047

def update_pool_size(pool)
  mutex = pool_mutex(pool['name'])
  return if mutex.locked?

  @redis.with_metrics do |redis|
    pool_size_requested = redis.hget('vmpooler__config__poolsize', pool['name'])
    break if pool_size_requested.nil?

    pool_size_requested = Integer(pool_size_requested)
    pool_size_currently = pool['size']
    break if pool_size_requested == pool_size_currently

    mutex.synchronize do
      pool['size'] = pool_size_requested
    end

    $logger.log('s', "[*] [#{pool['name']}] size updated from #{pool_size_currently} to #{pool_size_requested}")
  end
end

#update_pool_template(pool, provider, configured_template, prepared_template, redis) ⇒ Object 



988
989
990
991
992
993
994
995
996
997
 
# File 'lib/vmpooler/pool_manager.rb', line 988

def update_pool_template(pool, provider, configured_template, prepared_template, redis)
  pool['template'] = configured_template
  $logger.log('s', "[*] [#{pool['name']}] template updated from #{prepared_template} to #{configured_template}")
  # Remove all ready and pending VMs so new instances are created from the new template
  drain_pool(pool['name'], redis)
  # Prepare template for deployment
  $logger.log('s', "[*] [#{pool['name']}] preparing pool template for deployment")
  prepare_template(pool, provider, redis)
  $logger.log('s', "[*] [#{pool['name']}] is ready for use")
end

#used_providers ⇒ Array

ie. [“dummy”]

Returns:

  • (Array) —

    • a list of used providers from the config file, defaults to the default providers



632
633
634
635
 
# File 'lib/vmpooler/pool_manager.rb', line 632

def used_providers
  pools = config[:pools] || []
  @used_providers ||= (pools.map { |pool| pool[:provider] || pool['provider'] }.compact + default_providers).uniq
end

#vm_mutex(vmname) ⇒ Object 



913
914
915
 
# File 'lib/vmpooler/pool_manager.rb', line 913

def vm_mutex(vmname)
  @vm_mutex[vmname] || @vm_mutex[vmname] = Mutex.new
end

#vm_still_ready?(pool_name, vm_name, provider, redis) ⇒ Boolean

Returns:

  • (Boolean) 


180
181
182
183
184
185
186
187
 
# File 'lib/vmpooler/pool_manager.rb', line 180

def vm_still_ready?(pool_name, vm_name, provider, redis)
  # Check if the VM is still ready/available
  return true if provider.vm_ready?(pool_name, vm_name)

  raise("VM #{vm_name} is not ready")
rescue StandardError
  move_vm_queue(pool_name, vm_name, 'ready', 'completed', redis, "is unreachable, removed from 'ready' queue")
end

#vms_ready?(request_id, redis) ⇒ Boolean

Returns:

  • (Boolean) 


1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
 
# File 'lib/vmpooler/pool_manager.rb', line 1477

def vms_ready?(request_id, redis)
  catch :request_not_ready do
    request_hash = redis.hgetall("vmpooler__odrequest__#{request_id}")
    Parsing.get_platform_pool_count(request_hash['requested']) do |platform_alias, pool, count|
      pools_filled = redis.scard("vmpooler__#{request_id}__#{platform_alias}__#{pool}")
      throw :request_not_ready unless pools_filled.to_i == count.to_i
    end
    return true
  end
  false
end