aboutsummaryrefslogtreecommitdiffstats
path: root/resources/libraries/python/ContainerUtils.py
blob: b02033eeb9a24a32e364e5ce5dbb65997b4dcb7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
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
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
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
859
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
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
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
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
# Copyright (c) 2019 Cisco and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Bug workaround in pylint for abstract classes.
# pylint: disable=W0223

"""Library to manipulate Containers."""

from string import Template
from collections import OrderedDict, Counter

from resources.libraries.python.ssh import SSH
from resources.libraries.python.Constants import Constants
from resources.libraries.python.topology import Topology, SocketType
from resources.libraries.python.VppConfigGenerator import VppConfigGenerator


__all__ = ["ContainerManager", "ContainerEngine", "LXC", "Docker", "Container"]

SUPERVISOR_CONF = '/etc/supervisord.conf'


class ContainerManager(object):
    """Container lifecycle management class."""

    def __init__(self, engine):
        """Initialize Container Manager class.

        :param engine: Container technology used (LXC/Docker/...).
        :type engine: str
        :raises NotImplementedError: If container technology is not implemented.
        """
        try:
            self.engine = globals()[engine]()
        except KeyError:
            raise NotImplementedError('{engine} is not implemented.'.
                                      format(engine=engine))
        self.containers = OrderedDict()

    def get_container_by_name(self, name):
        """Get container instance.

        :param name: Container name.
        :type name: str
        :returns: Container instance.
        :rtype: Container
        :raises RuntimeError: If failed to get container with name.
        """
        try:
            return self.containers[name]
        except KeyError:
            raise RuntimeError('Failed to get container with name: {name}'.
                               format(name=name))

    def construct_container(self, **kwargs):
        """Construct container object on node with specified parameters.

        :param kwargs: Key-value pairs used to construct container.
        :param kwargs: dict
        """
        # Create base class
        self.engine.initialize()
        # Set parameters
        for key in kwargs:
            setattr(self.engine.container, key, kwargs[key])

        # Set additional environmental variables
        setattr(self.engine.container, 'env',
                'MICROSERVICE_LABEL={label}'.format(label=kwargs['name']))

        # Store container instance
        self.containers[kwargs['name']] = self.engine.container

    def construct_containers(self, **kwargs):
        """Construct 1..N container(s) on node with specified name.

        Ordinal number is automatically added to the name of container as
        suffix.

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        name = kwargs['name']
        for i in range(kwargs['count']):
            # Name will contain ordinal suffix
            kwargs['name'] = ''.join([name, str(i+1)])
            # Create container
            self.construct_container(i=i, **kwargs)

    def acquire_all_containers(self):
        """Acquire all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.acquire()

    def build_all_containers(self):
        """Build all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.build()

    def create_all_containers(self):
        """Create all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.create()

    def execute_on_container(self, name, command):
        """Execute command on container with name.

        :param name: Container name.
        :param command: Command to execute.
        :type name: str
        :type command: str
        """
        self.engine.container = self.get_container_by_name(name)
        self.engine.execute(command)

    def execute_on_all_containers(self, command):
        """Execute command on all containers.

        :param command: Command to execute.
        :type command: str
        """
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.execute(command)

    def start_vpp_in_all_containers(self):
        """Start VPP in all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            # We need to install supervisor client/server system to control VPP
            # as a service
            self.engine.install_supervisor()
            self.engine.start_vpp()

    def restart_vpp_in_all_containers(self):
        """Restart VPP in all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.restart_vpp()

    def configure_vpp_in_all_containers(self, chain_topology, **kwargs):
        """Configure VPP in all containers.

        :param chain_topology: Topology used for chaining containers can be
            chain or cross_horiz. Chain topology is using 1 memif pair per
            container. Cross_horiz topology is using 1 memif and 1 physical
            interface in container (only single container can be configured).
        :param kwargs: Named parameters.
        :type chain_topology: str
        :param kwargs: dict
        """
        # Count number of DUTs based on node's host information
        dut_cnt = len(Counter([self.containers[container].node['host']
                               for container in self.containers]))
        mod = len(self.containers)/dut_cnt

        for i, container in enumerate(self.containers):
            mid1 = i % mod + 1
            mid2 = i % mod + 1
            sid1 = i % mod * 2 + 1
            sid2 = i % mod * 2 + 2
            self.engine.container = self.containers[container]
            guest_dir = self.engine.container.mnt[0].split(':')[1]

            if chain_topology == 'chain':
                self._configure_vpp_chain_l2xc(mid1=mid1, mid2=mid2,
                                               sid1=sid1, sid2=sid2,
                                               guest_dir=guest_dir,
                                               **kwargs)
            elif chain_topology == 'cross_horiz':
                self._configure_vpp_cross_horiz(mid1=mid1, mid2=mid2,
                                                sid1=sid1, sid2=sid2,
                                                guest_dir=guest_dir,
                                                **kwargs)
            elif chain_topology == 'chain_functional':
                self._configure_vpp_chain_functional(mid1=mid1, mid2=mid2,
                                                     sid1=sid1, sid2=sid2,
                                                     guest_dir=guest_dir,
                                                     **kwargs)
            elif chain_topology == 'chain_ip4':
                self._configure_vpp_chain_ip4(mid1=mid1, mid2=mid2,
                                              sid1=sid1, sid2=sid2,
                                              guest_dir=guest_dir,
                                              **kwargs)
            elif chain_topology == 'pipeline_ip4':
                self._configure_vpp_pipeline_ip4(mid1=mid1, mid2=mid2,
                                                 sid1=sid1, sid2=sid2,
                                                 guest_dir=guest_dir,
                                                 **kwargs)
            else:
                raise RuntimeError('Container topology {name} not implemented'.
                                   format(name=chain_topology))

    def _configure_vpp_chain_l2xc(self, **kwargs):
        """Configure VPP in chain topology with l2xc.

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        self.engine.create_vpp_startup_config()
        self.engine.create_vpp_exec_config(
            'memif_create_chain_l2xc.exec',
            mid1=kwargs['mid1'], mid2=kwargs['mid2'],
            sid1=kwargs['sid1'], sid2=kwargs['sid2'],
            socket1='{guest_dir}/memif-{c.name}-{sid1}'.
            format(c=self.engine.container, **kwargs),
            socket2='{guest_dir}/memif-{c.name}-{sid2}'.
            format(c=self.engine.container, **kwargs))

    def _configure_vpp_cross_horiz(self, **kwargs):
        """Configure VPP in cross horizontal topology (single memif).

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        if 'DUT1' in self.engine.container.name:
            if_pci = Topology.get_interface_pci_addr(
                self.engine.container.node, kwargs['dut1_if'])
            if_name = Topology.get_interface_name(
                self.engine.container.node, kwargs['dut1_if'])
        if 'DUT2' in self.engine.container.name:
            if_pci = Topology.get_interface_pci_addr(
                self.engine.container.node, kwargs['dut2_if'])
            if_name = Topology.get_interface_name(
                self.engine.container.node, kwargs['dut2_if'])
        self.engine.create_vpp_startup_config_dpdk_dev(if_pci)
        self.engine.create_vpp_exec_config(
            'memif_create_cross_horizon.exec',
            mid1=kwargs['mid1'], sid1=kwargs['sid1'], if_name=if_name,
            socket1='{guest_dir}/memif-{c.name}-{sid1}'.
            format(c=self.engine.container, **kwargs))

    def _configure_vpp_chain_functional(self, **kwargs):
        """Configure VPP in chain topology with l2xc (functional).

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        self.engine.create_vpp_startup_config_func_dev()
        self.engine.create_vpp_exec_config(
            'memif_create_chain_functional.exec',
            mid1=kwargs['mid1'], mid2=kwargs['mid2'],
            sid1=kwargs['sid1'], sid2=kwargs['sid2'],
            socket1='{guest_dir}/memif-{c.name}-{sid1}'.
            format(c=self.engine.container, **kwargs),
            socket2='{guest_dir}/memif-{c.name}-{sid2}'.
            format(c=self.engine.container, **kwargs),
            rx_mode='interrupt')

    def _configure_vpp_chain_ip4(self, **kwargs):
        """Configure VPP in chain topology with ip4.

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        self.engine.create_vpp_startup_config()

        vif1_mac = kwargs['tg_if1_mac'] \
            if (kwargs['mid1'] - 1) % kwargs['nodes'] + 1 == 1 \
            else '52:54:00:00:{0:02X}:02'.format(kwargs['mid1'] - 1)
        vif2_mac = kwargs['tg_if2_mac'] \
            if (kwargs['mid2'] - 1) % kwargs['nodes'] + 1 == kwargs['nodes'] \
            else '52:54:00:00:{0:02X}:01'.format(kwargs['mid2'] + 1)
        self.engine.create_vpp_exec_config(
            'memif_create_chain_ip4.exec',
            mid1=kwargs['mid1'], mid2=kwargs['mid2'],
            sid1=kwargs['sid1'], sid2=kwargs['sid2'],
            socket1='{guest_dir}/memif-{c.name}-{sid1}'.
            format(c=self.engine.container, **kwargs),
            socket2='{guest_dir}/memif-{c.name}-{sid2}'.
            format(c=self.engine.container, **kwargs),
            mac1='52:54:00:00:{0:02X}:01'.format(kwargs['mid1']),
            mac2='52:54:00:00:{0:02X}:02'.format(kwargs['mid2']),
            vif1_mac=vif1_mac, vif2_mac=vif2_mac)

    def _configure_vpp_pipeline_ip4(self, **kwargs):
        """Configure VPP in pipeline topology with ip4.

        :param kwargs: Named parameters.
        :param kwargs: dict
        """
        self.engine.create_vpp_startup_config()
        node = (kwargs['mid1'] - 1) % kwargs['nodes'] + 1
        mid1 = kwargs['mid1']
        mid2 = kwargs['mid2']
        role1 = 'master'
        role2 = 'master' \
            if node == kwargs['nodes'] or node == kwargs['nodes'] and node == 1\
            else 'slave'
        kwargs['mid2'] = kwargs['mid2'] \
            if node == kwargs['nodes'] or node == kwargs['nodes'] and node == 1\
            else kwargs['mid2'] + 1
        vif1_mac = kwargs['tg_if1_mac'] \
            if (kwargs['mid1'] - 1) % kwargs['nodes'] + 1 == 1 \
            else '52:54:00:00:{0:02X}:02'.format(kwargs['mid1'] - 1)
        vif2_mac = kwargs['tg_if2_mac'] \
            if (kwargs['mid2'] - 1) % kwargs['nodes'] + 1 == kwargs['nodes'] \
            else '52:54:00:00:{0:02X}:01'.format(kwargs['mid2'] + 1)
        socket1 = '{guest_dir}/memif-{c.name}-{sid1}'.\
            format(c=self.engine.container, **kwargs) \
            if node == 1 else '{guest_dir}/memif-pipe-{mid1}'.\
            format(c=self.engine.container, **kwargs)
        socket2 = '{guest_dir}/memif-{c.name}-{sid2}'.\
            format(c=self.engine.container, **kwargs) \
            if node == 1 and kwargs['nodes'] == 1 or node == kwargs['nodes'] \
            else '{guest_dir}/memif-pipe-{mid2}'.\
            format(c=self.engine.container, **kwargs)

        self.engine.create_vpp_exec_config(
            'memif_create_pipeline_ip4.exec',
            mid1=kwargs['mid1'], mid2=kwargs['mid2'],
            sid1=kwargs['sid1'], sid2=kwargs['sid2'],
            socket1=socket1, socket2=socket2, role1=role1, role2=role2,
            mac1='52:54:00:00:{0:02X}:01'.format(mid1),
            mac2='52:54:00:00:{0:02X}:02'.format(mid2),
            vif1_mac=vif1_mac, vif2_mac=vif2_mac)

    def stop_all_containers(self):
        """Stop all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.stop()

    def destroy_all_containers(self):
        """Destroy all containers."""
        for container in self.containers:
            self.engine.container = self.containers[container]
            self.engine.destroy()


class ContainerEngine(object):
    """Abstract class for container engine."""

    def __init__(self):
        """Init ContainerEngine object."""
        self.container = None

    def initialize(self):
        """Initialize container object."""
        self.container = Container()

    def acquire(self, force):
        """Acquire/download container.

        :param force: Destroy a container if exists and create.
        :type force: bool
        """
        raise NotImplementedError

    def build(self):
        """Build container (compile)."""
        raise NotImplementedError

    def create(self):
        """Create/deploy container."""
        raise NotImplementedError

    def execute(self, command):
        """Execute process inside container.

        :param command: Command to run inside container.
        :type command: str
        """
        raise NotImplementedError

    def stop(self):
        """Stop container."""
        raise NotImplementedError

    def destroy(self):
        """Destroy/remove container."""
        raise NotImplementedError

    def info(self):
        """Info about container."""
        raise NotImplementedError

    def system_info(self):
        """System info."""
        raise NotImplementedError

    def install_supervisor(self):
        """Install supervisord inside a container."""
        if isinstance(self, LXC):
            self.execute('sleep 3; apt-get update')
            self.execute('apt-get install -y supervisor')
        self.execute('echo "{config}" > {config_file} && '
                     'supervisord -c {config_file}'.
                     format(
                         config='[unix_http_server]\n'
                         'file  = /tmp/supervisor.sock\n\n'
                         '[rpcinterface:supervisor]\n'
                         'supervisor.rpcinterface_factory = '
                         'supervisor.rpcinterface:make_main_rpcinterface\n\n'
                         '[supervisorctl]\n'
                         'serverurl = unix:///tmp/supervisor.sock\n\n'
                         '[supervisord]\n'
                         'pidfile = /tmp/supervisord.pid\n'
                         'identifier = supervisor\n'
                         'directory = /tmp\n'
                         'logfile=/tmp/supervisord.log\n'
                         'loglevel=debug\n'
                         'nodaemon=false\n\n',
                         config_file=SUPERVISOR_CONF))

    def start_vpp(self):
        """Start VPP inside a container."""
        self.execute('echo "{config}" >> {config_file}'.
                     format(
                         config='[program:vpp]\n'
                         'command=/usr/bin/vpp -c /etc/vpp/startup.conf\n'
                         'autostart=false\n'
                         'autorestart=false\n'
                         'redirect_stderr=true\n'
                         'priority=1',
                         config_file=SUPERVISOR_CONF))
        self.execute('supervisorctl reload')
        self.execute('supervisorctl start vpp')

        from robot.libraries.BuiltIn import BuiltIn
        topo_instance = BuiltIn().get_library_instance(
            'resources.libraries.python.topology.Topology')
        topo_instance.add_new_socket(
            self.container.node,
            SocketType.PAPI,
            self.container.name,
            '{root}/tmp/vpp_sockets/{name}/api.sock'.
            format(root=self.container.root, name=self.container.name))
        topo_instance.add_new_socket(
            self.container.node,
            SocketType.STATS,
            self.container.name,
            '{root}/tmp/vpp_sockets/{name}/stats.sock'.
            format(root=self.container.root, name=self.container.name))

    def restart_vpp(self):
        """Restart VPP service inside a container."""
        self.execute('supervisorctl restart vpp')
        self.execute('cat /tmp/supervisord.log')

    def create_base_vpp_startup_config(self):
        """Create base startup configuration of VPP on container.

        :returns: Base VPP startup configuration.
        :rtype: VppConfigGenerator
        """
        cpuset_cpus = self.container.cpuset_cpus

        # Create config instance
        vpp_config = VppConfigGenerator()
        vpp_config.set_node(self.container.node)
        vpp_config.add_unix_cli_listen()
        vpp_config.add_unix_nodaemon()
        vpp_config.add_unix_exec('/tmp/running.exec')
        vpp_config.add_socksvr(socket=Constants.SOCKSVR_PATH)
        vpp_config.add_statseg_per_node_counters(value='on')
        # We will pop the first core from the list to be a main core
        vpp_config.add_cpu_main_core(str(cpuset_cpus.pop(0)))
        # If more cores in the list, the rest will be used as workers.
        if cpuset_cpus:
            corelist_workers = ','.join(str(cpu) for cpu in cpuset_cpus)
            vpp_config.add_cpu_corelist_workers(corelist_workers)

        return vpp_config

    def create_vpp_startup_config(self):
        """Create startup configuration of VPP without DPDK on container.
        """
        vpp_config = self.create_base_vpp_startup_config()
        vpp_config.add_plugin('disable', 'dpdk_plugin.so')

        # Apply configuration
        self.execute('mkdir -p /etc/vpp/')
        self.execute('echo "{config}" | tee /etc/vpp/startup.conf'
                     .format(config=vpp_config.get_config_str()))

    def create_vpp_startup_config_dpdk_dev(self, *devices):
        """Create startup configuration of VPP with DPDK on container.

        :param devices: List of PCI devices to add.
        :type devices: list
        """
        vpp_config = self.create_base_vpp_startup_config()
        vpp_config.add_dpdk_dev(*devices)
        vpp_config.add_dpdk_no_tx_checksum_offload()
        vpp_config.add_dpdk_log_level('debug')
        vpp_config.add_plugin('disable', 'default')
        vpp_config.add_plugin('enable', 'dpdk_plugin.so')
        vpp_config.add_plugin('enable', 'memif_plugin.so')

        # Apply configuration
        self.execute('mkdir -p /etc/vpp/')
        self.execute('echo "{config}" | tee /etc/vpp/startup.conf'
                     .format(config=vpp_config.get_config_str()))

    def create_vpp_startup_config_func_dev(self):
        """Create startup configuration of VPP on container for functional
        vpp_device tests.
        """
        # Create config instance
        vpp_config = VppConfigGenerator()
        vpp_config.set_node(self.container.node)
        vpp_config.add_unix_cli_listen()
        vpp_config.add_unix_nodaemon()
        vpp_config.add_unix_exec('/tmp/running.exec')
        vpp_config.add_socksvr(socket=Constants.SOCKSVR_PATH)
        vpp_config.add_statseg_per_node_counters(value='on')
        vpp_config.add_plugin('disable', 'dpdk_plugin.so')

        # Apply configuration
        self.execute('mkdir -p /etc/vpp/')
        self.execute('echo "{config}" | tee /etc/vpp/startup.conf'
                     .format(config=vpp_config.get_config_str()))

    def create_vpp_exec_config(self, template_file, **kwargs):
        """Create VPP exec configuration on container.

        :param template_file: File name of a template script.
        :param kwargs: Parameters for script.
        :type template_file: str
        :type kwargs: dict
        """
        running = '/tmp/running.exec'

        template = '{res}/{tpl}'.format(
            res=Constants.RESOURCES_TPL_CONTAINER, tpl=template_file)

        with open(template, 'r') as src_file:
            src = Template(src_file.read())
            self.execute('echo "{out}" > {running}'.format(
                out=src.safe_substitute(**kwargs), running=running))

    def is_container_running(self):
        """Check if container is running."""
        raise NotImplementedError

    def is_container_present(self):
        """Check if container is present."""
        raise NotImplementedError

    def _configure_cgroup(self, name):
        """Configure the control group associated with a container.

        By default the cpuset cgroup is using exclusive CPU/MEM. When Docker/LXC
        container is initialized a new cgroup /docker or /lxc is created under
        cpuset parent tree. This newly created cgroup is inheriting parent
        setting for cpu/mem exclusive parameter and thus cannot be overriden
        within /docker or /lxc cgroup. This function is supposed to set cgroups
        to allow coexistence of both engines.

        :param name: Name of cgroup.
        :type name: str
        :raises RuntimeError: If applying cgroup settings via cgset failed.
        """
        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgset -r cpuset.cpu_exclusive=0 /')
        if int(ret) != 0:
            raise RuntimeError('Failed to apply cgroup settings.')

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgset -r cpuset.mem_exclusive=0 /')
        if int(ret) != 0:
            raise RuntimeError('Failed to apply cgroup settings.')

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgcreate -g cpuset:/{name}'.format(name=name))
        if int(ret) != 0:
            raise RuntimeError('Failed to copy cgroup settings from root.')

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgset -r cpuset.cpu_exclusive=0 /{name}'.format(name=name))
        if int(ret) != 0:
            raise RuntimeError('Failed to apply cgroup settings.')

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgset -r cpuset.mem_exclusive=0 /{name}'.format(name=name))
        if int(ret) != 0:
            raise RuntimeError('Failed to apply cgroup settings.')


class LXC(ContainerEngine):
    """LXC implementation."""

    # Implicit constructor is inherited.

    def acquire(self, force=True):
        """Acquire a privileged system object where configuration is stored.

        :param force: If a container exists, destroy it and create a new
            container.
        :type force: bool
        :raises RuntimeError: If creating the container or writing the container
            config fails.
        """
        if self.is_container_present():
            if force:
                self.destroy()
            else:
                return

        target_arch = 'arm64' \
            if Topology.get_node_arch(self.container.node) == 'aarch64' \
            else 'amd64'

        image = self.container.image if self.container.image else\
            "-d ubuntu -r bionic -a {arch}".format(arch=target_arch)

        cmd = 'lxc-create -t download --name {c.name} -- {image} '\
            '--no-validate'.format(c=self.container, image=image)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=1800)
        if int(ret) != 0:
            raise RuntimeError('Failed to create container.')

        self._configure_cgroup('lxc')

    def create(self):
        """Create/deploy an application inside a container on system.

        :raises RuntimeError: If creating the container fails.
        """
        if self.container.mnt:
            # LXC fix for tmpfs
            # https://github.com/lxc/lxc/issues/434
            ret, _, _ = self.container.ssh.exec_command_sudo(
                "sh -c 'echo \"{e}\" >> /var/lib/lxc/{c.name}/config'".
                format(e="lxc.mount.entry = tmpfs run tmpfs defaults",
                       c=self.container))
            if int(ret) != 0:
                raise RuntimeError('Failed to write {c.name} config.'.
                                   format(c=self.container))

            for mount in self.container.mnt:
                host_dir, guest_dir = mount.split(':')
                options = 'bind,create=dir' \
                    if guest_dir.endswith('/') else 'bind,create=file'
                entry = 'lxc.mount.entry = {host_dir} {guest_dir} none ' \
                    '{options} 0 0'.format(
                        host_dir=host_dir, guest_dir=guest_dir[1:],
                        options=options)
                ret, _, _ = self.container.ssh.exec_command_sudo(
                    "sh -c 'echo \"{e}\" >> /var/lib/lxc/{c.name}/config'".
                    format(e=entry, c=self.container))
                if int(ret) != 0:
                    raise RuntimeError('Failed to write {c.name} config.'
                                       .format(c=self.container))

        cpuset_cpus = '{0}'.format(
            ','.join('%s' % cpu for cpu in self.container.cpuset_cpus))\
            if self.container.cpuset_cpus else ''

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'lxc-start --name {c.name} --daemon'.format(c=self.container))
        if int(ret) != 0:
            raise RuntimeError('Failed to start container {c.name}.'.
                               format(c=self.container))
        self._lxc_wait('RUNNING')

        # Workaround for LXC to be able to allocate all cpus including isolated.
        ret, _, _ = self.container.ssh.exec_command_sudo(
            'cgset --copy-from / lxc/')
        if int(ret) != 0:
            raise RuntimeError('Failed to copy cgroup to LXC')

        ret, _, _ = self.container.ssh.exec_command_sudo(
            'lxc-cgroup --name {c.name} cpuset.cpus {cpus}'.
            format(c=self.container, cpus=cpuset_cpus))
        if int(ret) != 0:
            raise RuntimeError('Failed to set cpuset.cpus to container '
                               '{c.name}.'.format(c=self.container))

    def execute(self, command):
        """Start a process inside a running container.

        Runs the specified command inside the container specified by name. The
        container has to be running already.

        :param command: Command to run inside container.
        :type command: str
        :raises RuntimeError: If running the command failed.
        """
        env = '--keep-env {0}'.format(
            ' '.join('--set-var %s' % env for env in self.container.env))\
            if self.container.env else ''

        cmd = "lxc-attach {env} --name {c.name} -- /bin/sh -c '{command}; "\
            "exit $?'".format(env=env, c=self.container, command=command)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=180)
        if int(ret) != 0:
            raise RuntimeError('Failed to run command inside container '
                               '{c.name}.'.format(c=self.container))

    def stop(self):
        """Stop a container.

        :raises RuntimeError: If stopping the container failed.
        """
        cmd = 'lxc-stop --name {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to stop container {c.name}.'
                               .format(c=self.container))
        self._lxc_wait('STOPPED|FROZEN')

    def destroy(self):
        """Destroy a container.

        :raises RuntimeError: If destroying container failed.
        """
        cmd = 'lxc-destroy --force --name {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to destroy container {c.name}.'
                               .format(c=self.container))

    def info(self):
        """Query and shows information about a container.

        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'lxc-info --name {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get info about container {c.name}.'
                               .format(c=self.container))

    def system_info(self):
        """Check the current kernel for LXC support.

        :raises RuntimeError: If checking LXC support failed.
        """
        cmd = 'lxc-checkconfig'

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to check LXC support.')

    def is_container_running(self):
        """Check if container is running on node.

        :returns: True if container is running.
        :rtype: bool
        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'lxc-info --no-humanize --state --name {c.name}'\
            .format(c=self.container)

        ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get info about container {c.name}.'
                               .format(c=self.container))
        return True if 'RUNNING' in stdout else False

    def is_container_present(self):
        """Check if container is existing on node.

        :returns: True if container is present.
        :rtype: bool
        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'lxc-info --no-humanize --name {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        return False if int(ret) else True

    def _lxc_wait(self, state):
        """Wait for a specific container state.

        :param state: Specify the container state(s) to wait for.
        :type state: str
        :raises RuntimeError: If waiting for state of a container failed.
        """
        cmd = 'lxc-wait --name {c.name} --state "{s}"'\
            .format(c=self.container, s=state)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to wait for state "{s}" of container '
                               '{c.name}.'.format(s=state, c=self.container))


class Docker(ContainerEngine):
    """Docker implementation."""

    # Implicit constructor is inherited.

    def acquire(self, force=True):
        """Pull an image or a repository from a registry.

        :param force: Destroy a container if exists.
        :type force: bool
        :raises RuntimeError: If pulling a container failed.
        """
        if self.is_container_present():
            if force:
                self.destroy()
            else:
                return

        if not self.container.image:
            img = Constants.DOCKER_SUT_IMAGE_UBUNTU_ARM \
                if Topology.get_node_arch(self.container.node) == 'aarch64' \
                else Constants.DOCKER_SUT_IMAGE_UBUNTU
            setattr(self.container, 'image', img)

        cmd = 'docker pull {image}'.format(image=self.container.image)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=1800)
        if int(ret) != 0:
            raise RuntimeError('Failed to create container {c.name}.'
                               .format(c=self.container))

        if self.container.cpuset_cpus:
            self._configure_cgroup('docker')

    def create(self):
        """Create/deploy container.

        :raises RuntimeError: If creating a container failed.
        """
        cpuset_cpus = '--cpuset-cpus={0}'.format(
            ','.join('%s' % cpu for cpu in self.container.cpuset_cpus))\
            if self.container.cpuset_cpus else ''

        cpuset_mems = '--cpuset-mems={0}'.format(self.container.cpuset_mems)\
            if self.container.cpuset_mems is not None else ''
        # Temporary workaround - disabling due to bug in memif
        cpuset_mems = ''

        env = '{0}'.format(
            ' '.join('--env %s' % env for env in self.container.env))\
            if self.container.env else ''

        command = '{0}'.format(self.container.command)\
            if self.container.command else ''

        publish = '{0}'.format(
            ' '.join('--publish %s' % var for var in self.container.publish))\
            if self.container.publish else ''

        volume = '{0}'.format(
            ' '.join('--volume %s' % mnt for mnt in self.container.mnt))\
            if self.container.mnt else ''

        cmd = 'docker run '\
            '--privileged --detach --interactive --tty --rm '\
            '--cgroup-parent docker {cpuset_cpus} {cpuset_mems} {publish} '\
            '{env} {volume} --name {container.name} {container.image} '\
            '{command}'.format(cpuset_cpus=cpuset_cpus, cpuset_mems=cpuset_mems,
                               container=self.container, command=command,
                               env=env, publish=publish, volume=volume)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to create container {c.name}'
                               .format(c=self.container))

        self.info()

    def execute(self, command):
        """Start a process inside a running container.

        Runs the specified command inside the container specified by name. The
        container has to be running already.

        :param command: Command to run inside container.
        :type command: str
        :raises RuntimeError: If running the command in a container failed.
        """
        cmd = "docker exec --interactive {c.name} /bin/sh -c '{command}; "\
            "exit $?'".format(c=self.container, command=command)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=180)
        if int(ret) != 0:
            raise RuntimeError('Failed to execute command in container '
                               '{c.name}.'.format(c=self.container))

    def stop(self):
        """Stop running container.

        :raises RuntimeError: If stopping a container failed.
        """
        cmd = 'docker stop {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to stop container {c.name}.'
                               .format(c=self.container))

    def destroy(self):
        """Remove a container.

        :raises RuntimeError: If removing a container failed.
        """
        cmd = 'docker rm --force {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to destroy container {c.name}.'
                               .format(c=self.container))

    def info(self):
        """Return low-level information on Docker objects.

        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'docker inspect {c.name}'.format(c=self.container)

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get info about container {c.name}.'
                               .format(c=self.container))

    def system_info(self):
        """Display the docker system-wide information.

        :raises RuntimeError: If displaying system information failed.
        """
        cmd = 'docker system info'

        ret, _, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get system info.')

    def is_container_present(self):
        """Check if container is present on node.

        :returns: True if container is present.
        :rtype: bool
        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'docker ps --all --quiet --filter name={c.name}'\
            .format(c=self.container)

        ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get info about container {c.name}.'
                               .format(c=self.container))
        return True if stdout else False

    def is_container_running(self):
        """Check if container is running on node.

        :returns: True if container is running.
        :rtype: bool
        :raises RuntimeError: If getting info about a container failed.
        """
        cmd = 'docker ps --quiet --filter name={c.name}'\
            .format(c=self.container)

        ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd)
        if int(ret) != 0:
            raise RuntimeError('Failed to get info about container {c.name}.'
                               .format(c=self.container))
        return True if stdout else False


class Container(object):
    """Container class."""

    def __init__(self):
        """Initialize Container object."""
        pass

    def __getattr__(self, attr):
        """Get attribute custom implementation.

        :param attr: Attribute to get.
        :type attr: str
        :returns: Attribute value or None.
        :rtype: any
        """
        try:
            return self.__dict__[attr]
        except KeyError:
            return None

    def __setattr__(self, attr, value):
        """Set attribute custom implementation.

        :param attr: Attribute to set.
        :param value: Value to set.
        :type attr: str
        :type value: any
        """
        try:
            # Check if attribute exists
            self.__dict__[attr]
        except KeyError:
            # Creating new attribute
            if attr == 'node':
                self.__dict__['ssh'] = SSH()
                self.__dict__['ssh'].connect(value)
            self.__dict__[attr] = value
        else:
            # Updating attribute base of type
            if isinstance(self.__dict__[attr], list):
                self.__dict__[attr].append(value)
            else:
                self.__dict__[attr] = value