Class: OpenNebula::Service

Inherits:
DocumentJSON show all
Defined in:
lib/models/service.rb

Overview

Service class as wrapper of DocumentJSON

Constant Summary collapse

DOCUMENT_TYPE = 
100
STATE = 
{
    'PENDING'                 => 0,
    'DEPLOYING'               => 1,
    'RUNNING'                 => 2,
    'UNDEPLOYING'             => 3,
    'WARNING'                 => 4,
    'DONE'                    => 5,
    'FAILED_UNDEPLOYING'      => 6,
    'FAILED_DEPLOYING'        => 7,
    'SCALING'                 => 8,
    'FAILED_SCALING'          => 9,
    'COOLDOWN'                => 10,
    'DEPLOYING_NETS'          => 11,
    'UNDEPLOYING_NETS'        => 12,
    'FAILED_DEPLOYING_NETS'   => 13,
    'FAILED_UNDEPLOYING_NETS' => 14,
    'HOLD'                    => 15
}
STATE_STR = 
%w[
    PENDING
    DEPLOYING
    RUNNING
    UNDEPLOYING
    WARNING
    DONE
    FAILED_UNDEPLOYING
    FAILED_DEPLOYING
    SCALING
    FAILED_SCALING
    COOLDOWN
    DEPLOYING_NETS
    UNDEPLOYING_NETS
    FAILED_DEPLOYING_NETS
    FAILED_UNDEPLOYING_NETS
    HOLD
]
TRANSIENT_STATES = 
%w[
    DEPLOYING
    UNDEPLOYING
    SCALING
    COOLDOWN
    DEPLOYING_NETS
    UNDEPLOYING_NETS
]
FAILED_STATES = 
%w[
    FAILED_DEPLOYING
    FAILED_UNDEPLOYING
    FAILED_SCALING
    FAILED_DEPLOYING_NETS
    FAILED_UNDEPLOYING_NETS
]
RECOVER_DEPLOY_STATES = 
%w[
    FAILED_DEPLOYING
    DEPLOYING
    PENDING
]
RECOVER_UNDEPLOY_STATES = 
%w[
    FAILED_UNDEPLOYING
    UNDEPLOYING
    FAILED_UNDEPLOYING_NETS
]
RECOVER_SCALE_STATES = 
%w[
    FAILED_SCALING
    SCALING
]
RECOVER_DEPLOY_NETS_STATES = 
%w[DEPLOYING_NETS FAILED_DEPLOYING_NETS]
RECOVER_UNDEPLOY_NETS_STATES = 
%w[
    UNDEPLOYING_NETS
    FAILED_UNDEPLOYING_NETS
]
IMMUTABLE_ATTRS =

List of attributes that can’t be changed in update operation

custom_attrs: it only has sense when deploying, not in running custom_attrs_values: it only has sense when deploying, not in running deployment: changing this, changes the undeploy operation log: this is just internal information, no sense to change it name: this has to be changed using rename operation networks: it only has sense when deploying, not in running networks_values: it only has sense when deploying, not in running ready_status_gate: it only has sense when deploying, not in running state: this is internal information managed by OneFlow server start_time: this is internal information managed by OneFlow server

%w[
    custom_attrs
    custom_attrs_values
    deployment
    log
    name
    networks
    networks_values
    ready_status_gate
    state
    start_time
]
LOG_COMP = 
'SER'

Constants inherited from DocumentJSON

DocumentJSON::TEMPLATE_TAG

Constants inherited from Document

Document::DOCUMENT_METHODS

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from DocumentJSON

#allocate_xml, #build_template_xml, #load_body, #template_tag, #to_json

Methods inherited from Document

build_xml, #chmod, #chmod_octet, #clone, #delete, #document_type, #initialize, #owner_id, #public?, #rename

Methods inherited from PoolElement

#id, #name, new_with_id, #replace, #to_str

Methods inherited from XMLElement

#[], #add_element, #attr, build_xml, #delete_element, #each, #each_xpath, #element_xml, #has_elements?, #initialize, #initialize_xml, #name, #retrieve_elements, #retrieve_xmlelements, #set_content, #template_like_str, #template_str, #template_xml, #text, #to_hash, #to_xml, #xml_nil?

Constructor Details

This class inherits a constructor from OpenNebula::Document

Instance Attribute Details

#client ⇒ Object (readonly)

Returns the value of attribute client.



22
23
24
 
# File 'lib/models/service.rb', line 22

def client
  @client
end

#roles ⇒ Object (readonly)

Returns the value of attribute roles.



22
23
24
 
# File 'lib/models/service.rb', line 22

def roles
  @roles
end

Instance Method Details

#add_role(template) ⇒ OpenNebula::Role

Adds a role to the service

Parameters:

  • template (Hash) —

    Role information

Returns:



409
410
411
412
413
414
415
416
417
418
419
420
421
 
# File 'lib/models/service.rb', line 409

def add_role(template)
    template['state'] ||= Role::STATE['PENDING']
    role                = Role.new(template, self)

    if @roles[role.name]
        return OpenNebula::Error.new("Role #{role.name} already exists")
    end

    @roles[role.name] = role
    @body['roles'] << template if @body && @body['roles']

    role
end

#all_roles_done? ⇒ true, false

Returns true if all the nodes are in done state

Returns:

  • (true, false) —

    true if all the nodes are correctly deployed



270
271
272
273
274
275
276
277
278
 
# File 'lib/models/service.rb', line 270

def all_roles_done?
    @roles.each do |_name, role|
        if role.state != Role::STATE['DONE']
            return false
        end
    end

    true
end

#all_roles_hold? ⇒ true, false

Returns true if all the nodes are in hold state

Returns:

  • (true, false) —

    true if all the nodes are in hold state



282
283
284
285
286
287
288
289
290
 
# File 'lib/models/service.rb', line 282

def all_roles_hold?
    @roles.each do |_name, role|
        if role.state != Role::STATE['HOLD']
            return false
        end
    end

    true
end

#all_roles_running? ⇒ true, false

Returns true if all the nodes are correctly deployed

Returns:

  • (true, false) —

    true if all the nodes are correctly deployed



258
259
260
261
262
263
264
265
266
 
# File 'lib/models/service.rb', line 258

def all_roles_running?
    @roles.each do |_name, role|
        if role.state != Role::STATE['RUNNING']
            return false
        end
    end

    true
end

#allocate(template_json) ⇒ nil, OpenNebula::Error

Create a new service based on the template provided

Parameters:

  • template_json (String)

Returns:



314
315
316
317
318
319
320
321
322
323
324
325
326
327
 
# File 'lib/models/service.rb', line 314

def allocate(template_json)
    template = JSON.parse(template_json)
    template['state'] = STATE['PENDING']

    if template['roles']
        template['roles'].each do |elem|
            elem['state'] ||= Role::STATE['PENDING']
        end
    end

    template['start_time'] = Integer(Time.now)

    super(template.to_json, template['name'])
end

#can_recover_deploy? ⇒ Boolean

Returns:

  • (Boolean) 


181
182
183
 
# File 'lib/models/service.rb', line 181

def can_recover_deploy?
    RECOVER_DEPLOY_STATES.include? STATE_STR[state]
end

#can_recover_deploy_nets? ⇒ Boolean

Returns:

  • (Boolean) 


193
194
195
 
# File 'lib/models/service.rb', line 193

def can_recover_deploy_nets?
    RECOVER_DEPLOY_NETS_STATES.include?(STATE_STR[state])
end

#can_recover_scale? ⇒ Boolean

Returns:

  • (Boolean) 


189
190
191
 
# File 'lib/models/service.rb', line 189

def can_recover_scale?
    RECOVER_SCALE_STATES.include? STATE_STR[state]
end

#can_recover_undeploy? ⇒ Boolean

Returns:

  • (Boolean) 


185
186
187
 
# File 'lib/models/service.rb', line 185

def can_recover_undeploy?
    RECOVER_UNDEPLOY_STATES.include? STATE_STR[state]
end

#can_recover_undeploy_nets? ⇒ Boolean

Returns:

  • (Boolean) 


197
198
199
 
# File 'lib/models/service.rb', line 197

def can_recover_undeploy_nets?
    RECOVER_UNDEPLOY_NETS_STATES.include?(STATE_STR[state])
end

#can_scale? ⇒ Boolean

Returns:

  • (Boolean) 


696
697
698
 
# File 'lib/models/service.rb', line 696

def can_scale?
    state == Service::STATE['RUNNING']
end

#can_undeploy? ⇒ Boolean

Return true if the service can be undeployed

Returns:

  • (Boolean) —

    true if the service can be undeployed, false otherwise



164
165
166
167
168
169
170
171
172
173
 
# File 'lib/models/service.rb', line 164

def can_undeploy?
    # rubocop:disable Style/IfWithBooleanLiteralBranches
    if (transient_state? && state != Service::STATE['UNDEPLOYING']) ||
        state == Service::STATE['DONE'] || failed_state?
        false
    else
        true
    end
    # rubocop:enable Style/IfWithBooleanLiteralBranches
end

#can_update? ⇒ Boolean

Return true if the service can be updated

Returns:

  • (Boolean) —

    true if the service can be updated, false otherwise



177
178
179
 
# File 'lib/models/service.rb', line 177

def can_update?
    !transient_state? && !failed_state?
end

#check_new_template(template_json, append) ⇒ Boolean, String

Check that changes values are correct

Parameters:

  • template_json (String) —

    New template

  • append (Boolean) —

    True to append template to the current

Returns:

  • (Boolean, String) —

    True, nil if everything is correct False, attr if attr was changed



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
 
# File 'lib/models/service.rb', line 600

def check_new_template(template_json, append)
    template = JSON.parse(template_json)

    if append
        IMMUTABLE_ATTRS.each do |attr|
            next if template[attr].nil?

            return [false, "service/#{attr}"]
        end
    else
        if template['roles'].size != @roles.size
            return [false, 'service/roles size']
        end

        IMMUTABLE_ATTRS.each do |attr|
            next if template[attr] == @body[attr]

            return [false, "service/#{attr}"]
        end

        template['roles'].each do |role|
            # Role name can't be changed, if it is changed some problems
            # may appear, as name is used to reference roles
            return [false, 'name'] unless @roles[role['name']]

            rc = @roles[role['name']].check_new_template(role)

            return rc unless rc[0]
        end
    end

    [true, nil]
end

#check_role(role) ⇒ Boolean

Check if role is terminated or not

Parameters:

Returns:

  • (Boolean) —

    True if the service should be undeployed False otherwise



707
708
709
710
711
712
713
714
715
716
717
 
# File 'lib/models/service.rb', line 707

def check_role(role)
    return unless @body['automatic_deletion']

    return unless role.nodes.empty?

    ret = true

    @body['roles'].each {|r| ret &= r['nodes'].empty? }

    ret
end

#chown(uid, gid) ⇒ nil, OpenNebula::Error

Changes the owner/group

Parameters:

  • uid (Integer) —

    the new owner id. Use -1 to leave the current one

  • gid (Integer) —

    the new group id. Use -1 to leave the current one

Returns:



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
 
# File 'lib/models/service.rb', line 473

def chown(uid, gid)
    old_uid = self['UID'].to_i
    old_gid = self['GID'].to_i

    rc = super(uid, gid)

    if OpenNebula.is_error?(rc)
        return rc
    end

    @roles.each do |_name, role|
        rc = role.chown(uid, gid)

        break if rc[0] == false
    end

    if rc[0] == false
        log_error('Chown operation failed, will try to rollback ' \
                  'all VMs to the old user and group')

        update

        super(old_uid, old_gid)

        @roles.each do |_name, role|
            role.chown(old_uid, old_gid)
        end

        return OpenNebula::Error.new(rc[1])
    end

    nil
end

#delete_networks ⇒ Object 



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
 
# File 'lib/models/service.rb', line 670

def delete_networks
    vnets        = @body['networks_values']
    vnets_failed = []

    return if vnets.nil?

    vnets.each do |vnet|
        vnet.each do |_, net|
            key = net.keys.first

            next unless %w[template_id reserve_from].include?(key)

            rc = OpenNebula::VirtualNetwork.new_with_id(
                net['id'],
                @client
            ).delete

            next unless OpenNebula.is_error?(rc)

            vnets_failed << net['id']
        end
    end

    vnets_failed
end

#deploy_networks(deploy = true) ⇒ Object 



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
 
# File 'lib/models/service.rb', line 634

def deploy_networks(deploy = true)
    if deploy
        body = JSON.parse(self['TEMPLATE/BODY'])
    else
        body = @body
    end

    return if body['networks_values'].nil?

    body['networks_values'].each do |vnet|
        vnet.each do |name, net|
            key = net.keys.first

            case key
            when 'id'
                next
            when 'template_id'
                rc = create_vnet(name, net)
            when 'reserve_from'
                rc = reserve(name, net)
            end

            return rc if OpenNebula.is_error?(rc)

            net['id'] = rc
        end
    end if deploy

    # Replace $attibute by the corresponding value
    resolve_attributes(body)

    # @body = template.to_hash

    update_body(body)
end

#failed_state? ⇒ Boolean

Return true if the service is in failed state

Returns:

  • (Boolean) —

    true if the service is in failed state, false otherwise



158
159
160
 
# File 'lib/models/service.rb', line 158

def failed_state?
    FAILED_STATES.include? STATE_STR[state]
end

#gid ⇒ Object 



217
218
219
 
# File 'lib/models/service.rb', line 217

def gid
    self['GID'].to_i
end

#hold? ⇒ Boolean

Returns:

  • (Boolean) 


227
228
229
 
# File 'lib/models/service.rb', line 227

def hold?
    state_str == 'HOLD'
end

#info ⇒ nil, OpenNebula::Error

Retrieves the information of the Service and all its Nodes.

Returns:



385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
 
# File 'lib/models/service.rb', line 385

def info
    rc = super
    if OpenNebula.is_error?(rc)
        return rc
    end

    @roles = {}

    if @body['roles']
        @body['roles'].each do |elem|
            elem['state'] ||= Role::STATE['PENDING']
            role = Role.new(elem, self)
            @roles[role.name] = role
        end
    end

    nil
end

#info_roles ⇒ nil, OpenNebula::Error

Retrieves the information of the Service and all its Nodes.

Returns:



438
439
440
441
442
443
444
445
446
447
448
449
450
 
# File 'lib/models/service.rb', line 438

def info_roles
    @roles = {}

    if @body['roles']
        @body['roles'].each do |elem|
            elem['state'] ||= Role::STATE['PENDING']
            role = Role.new(elem, self)
            @roles[role.name] = role
        end
    end

    nil
end

#log_error(message) ⇒ Object

Add an error message in the service information that will be stored

in OpenNebula

Parameters:

  • message (String) 


462
463
464
 
# File 'lib/models/service.rb', line 462

def log_error(message)
    add_log(Logger::ERROR, message)
end

#log_info(message) ⇒ Object

Add an info message in the service information that will be stored

in OpenNebula

Parameters:

  • message (String) 


455
456
457
 
# File 'lib/models/service.rb', line 455

def log_info(message)
    add_log(Logger::INFO, message)
end

#networks(deploy) ⇒ Array

Returns virtual networks IDs

Returns:

  • (Array) —

    Array of integers containing the IDs



294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
 
# File 'lib/models/service.rb', line 294

def networks(deploy)
    ret = []

    return ret unless @body['networks_values']

    @body['networks_values'].each do |vnet|
        vnet.each do |_, net|
            next if net.keys.first == 'id' && !deploy

            ret << net['id'].to_i
        end
    end

    ret
end

#on_hold? ⇒ true, false

Returns the on_hold service option

Returns:

  • (true, false) —

    true if the on_hold option is enabled



223
224
225
 
# File 'lib/models/service.rb', line 223

def on_hold?
    @body['on_hold']
end

#recover ⇒ nil, OpenNebula::Error

Recover a failed service.

Returns:



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
 
# File 'lib/models/service.rb', line 332

def recover
    if [Service::STATE['FAILED_DEPLOYING']].include?(state)
        @roles.each do |_name, role|
            if role.state == Role::STATE['FAILED_DEPLOYING']
                role.set_state(Role::STATE['PENDING'])
            end
        end

        set_state(Service::STATE['DEPLOYING'])

    elsif state == Service::STATE['FAILED_SCALING']
        @roles.each do |_name, role|
            if role.state == Role::STATE['FAILED_SCALING']
                role.set_state(Role::STATE['SCALING'])
            end
        end

        set_state(Service::STATE['SCALING'])

    elsif state == Service::STATE['FAILED_UNDEPLOYING']
        @roles.each do |_name, role|
            if role.state == Role::STATE['FAILED_UNDEPLOYING']
                role.set_state(Role::STATE['RUNNING'])
            end
        end

        set_state(Service::STATE['UNDEPLOYING'])

    elsif state == Service::STATE['COOLDOWN']
        @roles.each do |_name, role|
            if role.state == Role::STATE['COOLDOWN']
                role.set_state(Role::STATE['RUNNING'])
            end
        end

        set_state(Service::STATE['RUNNING'])

    elsif state == Service::STATE['WARNING']
        @roles.each do |_name, role|
            if role.state == Role::STATE['WARNING']
                role.recover_warning
            end
        end
    else
        OpenNebula::Error.new('Action recover: Wrong state' \
                              " #{state_str}")
    end
end

#remove_role(name) ⇒ Object

Removes a role from the service

Parameters:

  • name (String) —

    Role name to delete



426
427
428
429
430
431
432
 
# File 'lib/models/service.rb', line 426

def remove_role(name)
    @roles.delete(name)

    @body['roles'].delete_if do |role|
        role['name'] == name
    end
end

#replace_client(owner_client) ⇒ Object

Replaces this object’s client with a new one

Parameters:



233
234
235
 
# File 'lib/models/service.rb', line 233

def replace_client(owner_client)
    @client = owner_client
end

#report_ready? ⇒ true, false

Returns the running_status_vm option

Returns:

  • (true, false) —

    true if the running_status_vm option is enabled



209
210
211
 
# File 'lib/models/service.rb', line 209

def report_ready?
    @body['ready_status_gate']
end

#running? ⇒ Boolean

Return true if the service is running

Returns:

  • (Boolean) —

    true if the service is runnning, false otherwise



203
204
205
 
# File 'lib/models/service.rb', line 203

def running?
    state_str == 'RUNNING'
end

#set_state(state) ⇒ true, false

Sets a new state rubocop:disable Naming/AccessorMethodName

Parameters:

  • the (Integer) —

    new state

Returns:

  • (true, false) —

    true if the value was changed



241
242
243
244
245
246
247
248
249
250
251
252
253
254
 
# File 'lib/models/service.rb', line 241

def set_state(state)
    # rubocop:enable Naming/AccessorMethodName
    if state < 0 || state > STATE_STR.size
        return false
    end

    @body['state'] = state.to_i

    msg = "New state: #{STATE_STR[state]}"
    Log.info LOG_COMP, msg, id
    log_info(msg)

    true
end

#shutdown_action ⇒ Object 



549
550
551
 
# File 'lib/models/service.rb', line 549

def shutdown_action
    @body['shutdown_action']
end

#state ⇒ Integer

Returns the service state

Returns:

  • (Integer) —

    the service state



134
135
136
 
# File 'lib/models/service.rb', line 134

def state
    @body['state'].to_i
end

#state_str ⇒ Object

Returns the string representation of the service state

Returns:

  • the state string



146
147
148
 
# File 'lib/models/service.rb', line 146

def state_str
    STATE_STR[state]
end

#strategy ⇒ String

Returns the service strategy

Returns:

  • (String) —

    the service strategy



140
141
142
 
# File 'lib/models/service.rb', line 140

def strategy
    @body['deployment']
end

#transient_state? ⇒ Boolean

Returns true if the service is in transient state

Returns:

  • (Boolean) —

    true if the service is in transient state, false otherwise



152
153
154
 
# File 'lib/models/service.rb', line 152

def transient_state?
    TRANSIENT_STATES.include? STATE_STR[state]
end

#uname ⇒ Object 



213
214
215
 
# File 'lib/models/service.rb', line 213

def uname
    self['UNAME']
end

#update(template_json = nil, append = false) ⇒ nil, OpenNebula::Error

Replaces the template contents

Parameters:

  • template_json (String) (defaults to: nil) —

    New template contents

  • append (true, false) (defaults to: false) —

    True to append new attributes instead of replace the whole template

Returns:



561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
 
# File 'lib/models/service.rb', line 561

def update(template_json = nil, append = false)
    if template_json
        template = JSON.parse(template_json)

        if append
            rc = info

            if OpenNebula.is_error? rc
                return rc
            end

            template = @body.merge(template)
        end

        template_json = template.to_json
    end

    super(template_json, append)
end

#update_raw(template_raw, append = false) ⇒ nil, OpenNebula::Error

Replaces the raw template contents

Parameters:

  • template (String) —

    New template contents, in the form KEY = VAL

  • append (true, false) (defaults to: false) —

    True to append new attributes instead of replace the whole template

Returns:



589
590
591
 
# File 'lib/models/service.rb', line 589

def update_raw(template_raw, append = false)
    super(template_raw, append)
end

#update_role(role_name, template_json) ⇒ nil, OpenNebula::Error

Updates a role

Parameters:

  • role_name (String)
  • template_json (String)

Returns:



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
 
# File 'lib/models/service.rb', line 512

def update_role(role_name, template_json)
    if ![Service::STATE['RUNNING'], Service::STATE['WARNING']]
       .include?(state)

        return OpenNebula::Error.new('Update role: Wrong state' \
                                     " #{state_str}")
    end

    template = JSON.parse(template_json)

    # TODO: Validate template?

    role = @roles[role_name]

    if role.nil?
        return OpenNebula::Error.new("ROLE \"#{role_name}\" " \
                                     'does not exist')
    end

    rc = role.update(template)

    if OpenNebula.is_error?(rc)
        return rc
    end

    # TODO: The update may not change the cardinality, only
    # the max and min vms...

    role.set_state(Role::STATE['SCALING'])

    role.set_default_cooldown_duration

    set_state(Service::STATE['SCALING'])

    update
end