docker-compose/tests/integration/service_test.py

from __future__ import absolute_import
from __future__ import unicode_literals

import os
import re
import shutil
import tempfile
from distutils.spawn import find_executable
from os import path

import pytest
from docker.errors import APIError
from six import StringIO
from six import text_type

from .. import mock
from .testcases import docker_client
from .testcases import DockerClientTestCase
from .testcases import get_links
from .testcases import pull_busybox
from .testcases import SWARM_SKIP_CONTAINERS_ALL
from .testcases import SWARM_SKIP_CPU_SHARES
from compose import __version__
from compose.config.types import MountSpec
from compose.config.types import VolumeFromSpec
from compose.config.types import VolumeSpec
from compose.const import IS_WINDOWS_PLATFORM
from compose.const import LABEL_CONFIG_HASH
from compose.const import LABEL_CONTAINER_NUMBER
from compose.const import LABEL_ONE_OFF
from compose.const import LABEL_PROJECT
from compose.const import LABEL_SERVICE
from compose.const import LABEL_VERSION
from compose.container import Container
from compose.errors import OperationFailedError
from compose.project import OneOffFilter
from compose.service import ConvergencePlan
from compose.service import ConvergenceStrategy
from compose.service import NetworkMode
from compose.service import PidMode
from compose.service import Service
from compose.utils import parse_nanoseconds_int
from tests.helpers import create_custom_host_file
from tests.integration.testcases import is_cluster
from tests.integration.testcases import no_cluster
from tests.integration.testcases import v2_1_only
from tests.integration.testcases import v2_2_only
from tests.integration.testcases import v2_3_only
from tests.integration.testcases import v2_only
from tests.integration.testcases import v3_only


def create_and_start_container(service, **override_options):
    container = service.create_container(**override_options)
    return service.start_container(container)


class ServiceTest(DockerClientTestCase):

    def test_containers(self):
        foo = self.create_service('foo')
        bar = self.create_service('bar')

        create_and_start_container(foo)

        assert len(foo.containers()) == 1
        assert foo.containers()[0].name == 'composetest_foo_1'
        assert len(bar.containers()) == 0

        create_and_start_container(bar)
        create_and_start_container(bar)

        assert len(foo.containers()) == 1
        assert len(bar.containers()) == 2

        names = [c.name for c in bar.containers()]
        assert 'composetest_bar_1' in names
        assert 'composetest_bar_2' in names

    def test_containers_one_off(self):
        db = self.create_service('db')
        container = db.create_container(one_off=True)
        assert db.containers(stopped=True) == []
        assert db.containers(one_off=OneOffFilter.only, stopped=True) == [container]

    def test_project_is_added_to_container_name(self):
        service = self.create_service('web')
        create_and_start_container(service)
        assert service.containers()[0].name == 'composetest_web_1'

    def test_create_container_with_one_off(self):
        db = self.create_service('db')
        container = db.create_container(one_off=True)
        assert container.name == 'composetest_db_run_1'

    def test_create_container_with_one_off_when_existing_container_is_running(self):
        db = self.create_service('db')
        db.start()
        container = db.create_container(one_off=True)
        assert container.name == 'composetest_db_run_1'

    def test_create_container_with_unspecified_volume(self):
        service = self.create_service('db', volumes=[VolumeSpec.parse('/var/db')])
        container = service.create_container()
        service.start_container(container)
        assert container.get_mount('/var/db')

    def test_create_container_with_volume_driver(self):
        service = self.create_service('db', volume_driver='foodriver')
        container = service.create_container()
        service.start_container(container)
        assert 'foodriver' == container.get('HostConfig.VolumeDriver')

    @pytest.mark.skipif(SWARM_SKIP_CPU_SHARES, reason='Swarm --cpu-shares bug')
    def test_create_container_with_cpu_shares(self):
        service = self.create_service('db', cpu_shares=73)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.CpuShares') == 73

    def test_create_container_with_cpu_quota(self):
        service = self.create_service('db', cpu_quota=40000)
        container = service.create_container()
        container.start()
        assert container.get('HostConfig.CpuQuota') == 40000

    @v2_2_only()
    def test_create_container_with_cpu_count(self):
        self.require_api_version('1.25')
        service = self.create_service('db', cpu_count=2)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.CpuCount') == 2

    @v2_2_only()
    @pytest.mark.skipif(not IS_WINDOWS_PLATFORM, reason='cpu_percent is not supported for Linux')
    def test_create_container_with_cpu_percent(self):
        self.require_api_version('1.25')
        service = self.create_service('db', cpu_percent=12)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.CpuPercent') == 12

    @v2_2_only()
    def test_create_container_with_cpus(self):
        self.require_api_version('1.25')
        service = self.create_service('db', cpus=1)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.NanoCpus') == 1000000000

    def test_create_container_with_shm_size(self):
        self.require_api_version('1.22')
        service = self.create_service('db', shm_size=67108864)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.ShmSize') == 67108864

    def test_create_container_with_init_bool(self):
        self.require_api_version('1.25')
        service = self.create_service('db', init=True)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.Init') is True

    @pytest.mark.xfail(True, reason='Option has been removed in Engine 17.06.0')
    def test_create_container_with_init_path(self):
        self.require_api_version('1.25')
        docker_init_path = find_executable('docker-init')
        service = self.create_service('db', init=docker_init_path)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.InitPath') == docker_init_path

    @pytest.mark.xfail(True, reason='Some kernels/configs do not support pids_limit')
    def test_create_container_with_pids_limit(self):
        self.require_api_version('1.23')
        service = self.create_service('db', pids_limit=10)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.PidsLimit') == 10

    def test_create_container_with_extra_hosts_list(self):
        extra_hosts = ['somehost:162.242.195.82', 'otherhost:50.31.209.229']
        service = self.create_service('db', extra_hosts=extra_hosts)
        container = service.create_container()
        service.start_container(container)
        assert set(container.get('HostConfig.ExtraHosts')) == set(extra_hosts)

    def test_create_container_with_extra_hosts_dicts(self):
        extra_hosts = {'somehost': '162.242.195.82', 'otherhost': '50.31.209.229'}
        extra_hosts_list = ['somehost:162.242.195.82', 'otherhost:50.31.209.229']
        service = self.create_service('db', extra_hosts=extra_hosts)
        container = service.create_container()
        service.start_container(container)
        assert set(container.get('HostConfig.ExtraHosts')) == set(extra_hosts_list)

    def test_create_container_with_cpu_set(self):
        service = self.create_service('db', cpuset='0')
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.CpusetCpus') == '0'

    def test_create_container_with_read_only_root_fs(self):
        read_only = True
        service = self.create_service('db', read_only=read_only)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.ReadonlyRootfs') == read_only

    def test_create_container_with_blkio_config(self):
        blkio_config = {
            'weight': 300,
            'weight_device': [{'path': '/dev/sda', 'weight': 200}],
            'device_read_bps': [{'path': '/dev/sda', 'rate': 1024 * 1024 * 100}],
            'device_read_iops': [{'path': '/dev/sda', 'rate': 1000}],
            'device_write_bps': [{'path': '/dev/sda', 'rate': 1024 * 1024}],
            'device_write_iops': [{'path': '/dev/sda', 'rate': 800}]
        }
        service = self.create_service('web', blkio_config=blkio_config)
        container = service.create_container()
        assert container.get('HostConfig.BlkioWeight') == 300
        assert container.get('HostConfig.BlkioWeightDevice') == [{
            'Path': '/dev/sda', 'Weight': 200
        }]
        assert container.get('HostConfig.BlkioDeviceReadBps') == [{
            'Path': '/dev/sda', 'Rate': 1024 * 1024 * 100
        }]
        assert container.get('HostConfig.BlkioDeviceWriteBps') == [{
            'Path': '/dev/sda', 'Rate': 1024 * 1024
        }]
        assert container.get('HostConfig.BlkioDeviceReadIOps') == [{
            'Path': '/dev/sda', 'Rate': 1000
        }]
        assert container.get('HostConfig.BlkioDeviceWriteIOps') == [{
            'Path': '/dev/sda', 'Rate': 800
        }]

    def test_create_container_with_security_opt(self):
        security_opt = ['label:disable']
        service = self.create_service('db', security_opt=security_opt)
        container = service.create_container()
        service.start_container(container)
        assert set(container.get('HostConfig.SecurityOpt')) == set(security_opt)

    @pytest.mark.xfail(True, reason='Not supported on most drivers')
    def test_create_container_with_storage_opt(self):
        storage_opt = {'size': '1G'}
        service = self.create_service('db', storage_opt=storage_opt)
        container = service.create_container()
        service.start_container(container)
        assert container.get('HostConfig.StorageOpt') == storage_opt

    def test_create_container_with_oom_kill_disable(self):
        self.require_api_version('1.20')
        service = self.create_service('db', oom_kill_disable=True)
        container = service.create_container()
        assert container.get('HostConfig.OomKillDisable') is True

    def test_create_container_with_mac_address(self):
        service = self.create_service('db', mac_address='02:42:ac:11:65:43')
        container = service.create_container()
        service.start_container(container)
        assert container.inspect()['Config']['MacAddress'] == '02:42:ac:11:65:43'

    def test_create_container_with_specified_volume(self):
        host_path = '/tmp/host-path'
        container_path = '/container-path'

        service = self.create_service(
            'db',
            volumes=[VolumeSpec(host_path, container_path, 'rw')])
        container = service.create_container()
        service.start_container(container)
        assert container.get_mount(container_path)

        # Match the last component ("host-path"), because boot2docker symlinks /tmp
        actual_host_path = container.get_mount(container_path)['Source']

        assert path.basename(actual_host_path) == path.basename(host_path), (
            "Last component differs: %s, %s" % (actual_host_path, host_path)
        )

    @v2_3_only()
    def test_create_container_with_host_mount(self):
        host_path = '/tmp/host-path'
        container_path = '/container-path'

        create_custom_host_file(self.client, path.join(host_path, 'a.txt'), 'test')

        service = self.create_service(
            'db',
            volumes=[
                MountSpec(type='bind', source=host_path, target=container_path, read_only=True)
            ]
        )
        container = service.create_container()
        service.start_container(container)
        mount = container.get_mount(container_path)
        assert mount
        assert path.basename(mount['Source']) == path.basename(host_path)
        assert mount['RW'] is False

    @v2_3_only()
    def test_create_container_with_tmpfs_mount(self):
        container_path = '/container-tmpfs'
        service = self.create_service(
            'db',
            volumes=[MountSpec(type='tmpfs', target=container_path)]
        )
        container = service.create_container()
        service.start_container(container)
        mount = container.get_mount(container_path)
        assert mount
        assert mount['Type'] == 'tmpfs'

    @v2_3_only()
    def test_create_container_with_volume_mount(self):
        container_path = '/container-volume'
        volume_name = 'composetest_abcde'
        self.client.create_volume(volume_name)
        service = self.create_service(
            'db',
            volumes=[MountSpec(type='volume', source=volume_name, target=container_path)]
        )
        container = service.create_container()
        service.start_container(container)
        mount = container.get_mount(container_path)
        assert mount
        assert mount['Name'] == volume_name

    @v3_only()
    def test_create_container_with_legacy_mount(self):
        # Ensure mounts are converted to volumes if API version < 1.30
        # Needed to support long syntax in the 3.2 format
        client = docker_client({}, version='1.25')
        container_path = '/container-volume'
        volume_name = 'composetest_abcde'
        self.client.create_volume(volume_name)
        service = Service('db', client=client, volumes=[
            MountSpec(type='volume', source=volume_name, target=container_path)
        ], image='busybox:latest', command=['top'], project='composetest')
        container = service.create_container()
        service.start_container(container)
        mount = container.get_mount(container_path)
        assert mount
        assert mount['Name'] == volume_name

    def test_create_container_with_healthcheck_config(self):
        one_second = parse_nanoseconds_int('1s')
        healthcheck = {
            'test': ['true'],
            'interval': 2 * one_second,
            'timeout': 5 * one_second,
            'retries': 5,
            'start_period': 2 * one_second
        }
        service = self.create_service('db', healthcheck=healthcheck)
        container = service.create_container()
        remote_healthcheck = container.get('Config.Healthcheck')
        assert remote_healthcheck['Test'] == healthcheck['test']
        assert remote_healthcheck['Interval'] == healthcheck['interval']
        assert remote_healthcheck['Timeout'] == healthcheck['timeout']
        assert remote_healthcheck['Retries'] == healthcheck['retries']
        assert remote_healthcheck['StartPeriod'] == healthcheck['start_period']

    def test_recreate_preserves_volume_with_trailing_slash(self):
        """When the Compose file specifies a trailing slash in the container path, make
        sure we copy the volume over when recreating.
        """
        service = self.create_service('data', volumes=[VolumeSpec.parse('/data/')])
        old_container = create_and_start_container(service)
        volume_path = old_container.get_mount('/data')['Source']

        new_container = service.recreate_container(old_container)
        assert new_container.get_mount('/data')['Source'] == volume_path

    def test_duplicate_volume_trailing_slash(self):
        """
        When an image specifies a volume, and the Compose file specifies a host path
        but adds a trailing slash, make sure that we don't create duplicate binds.
        """
        host_path = '/tmp/data'
        container_path = '/data'
        volumes = [VolumeSpec.parse('{}:{}/'.format(host_path, container_path))]

        tmp_container = self.client.create_container(
            'busybox', 'true',
            volumes={container_path: {}},
            labels={'com.docker.compose.test_image': 'true'},
            host_config={}
        )
        image = self.client.commit(tmp_container)['Id']

        service = self.create_service('db', image=image, volumes=volumes)
        old_container = create_and_start_container(service)

        assert old_container.get('Config.Volumes') == {container_path: {}}

        service = self.create_service('db', image=image, volumes=volumes)
        new_container = service.recreate_container(old_container)

        assert new_container.get('Config.Volumes') == {container_path: {}}

        assert service.containers(stopped=False) == [new_container]

    def test_create_container_with_volumes_from(self):
        volume_service = self.create_service('data')
        volume_container_1 = volume_service.create_container()
        volume_container_2 = Container.create(
            self.client,
            image='busybox:latest',
            command=["top"],
            labels={LABEL_PROJECT: 'composetest'},
            host_config={},
            environment=['affinity:container=={}'.format(volume_container_1.id)],
        )
        host_service = self.create_service(
            'host',
            volumes_from=[
                VolumeFromSpec(volume_service, 'rw', 'service'),
                VolumeFromSpec(volume_container_2, 'rw', 'container')
            ],
            environment=['affinity:container=={}'.format(volume_container_1.id)],
        )
        host_container = host_service.create_container()
        host_service.start_container(host_container)
        assert volume_container_1.id + ':rw' in host_container.get('HostConfig.VolumesFrom')
        assert volume_container_2.id + ':rw' in host_container.get('HostConfig.VolumesFrom')

    def test_execute_convergence_plan_recreate(self):
        service = self.create_service(
            'db',
            environment={'FOO': '1'},
            volumes=[VolumeSpec.parse('/etc')],
            entrypoint=['top'],
            command=['-d', '1']
        )
        old_container = service.create_container()
        assert old_container.get('Config.Entrypoint') == ['top']
        assert old_container.get('Config.Cmd') == ['-d', '1']
        assert 'FOO=1' in old_container.get('Config.Env')
        assert old_container.name == 'composetest_db_1'
        service.start_container(old_container)
        old_container.inspect()  # reload volume data
        volume_path = old_container.get_mount('/etc')['Source']

        num_containers_before = len(self.client.containers(all=True))

        service.options['environment']['FOO'] = '2'
        new_container, = service.execute_convergence_plan(
            ConvergencePlan('recreate', [old_container]))

        assert new_container.get('Config.Entrypoint') == ['top']
        assert new_container.get('Config.Cmd') == ['-d', '1']
        assert 'FOO=2' in new_container.get('Config.Env')
        assert new_container.name == 'composetest_db_1'
        assert new_container.get_mount('/etc')['Source'] == volume_path
        if not is_cluster(self.client):
            assert (
                'affinity:container==%s' % old_container.id in
                new_container.get('Config.Env')
            )
        else:
            # In Swarm, the env marker is consumed and the container should be deployed
            # on the same node.
            assert old_container.get('Node.Name') == new_container.get('Node.Name')

        assert len(self.client.containers(all=True)) == num_containers_before
        assert old_container.id != new_container.id
        with pytest.raises(APIError):
            self.client.inspect_container(old_container.id)

    def test_execute_convergence_plan_recreate_twice(self):
        service = self.create_service(
            'db',
            volumes=[VolumeSpec.parse('/etc')],
            entrypoint=['top'],
            command=['-d', '1'])

        orig_container = service.create_container()
        service.start_container(orig_container)

        orig_container.inspect()  # reload volume data
        volume_path = orig_container.get_mount('/etc')['Source']

        # Do this twice to reproduce the bug
        for _ in range(2):
            new_container, = service.execute_convergence_plan(
                ConvergencePlan('recreate', [orig_container]))

            assert new_container.get_mount('/etc')['Source'] == volume_path
            if not is_cluster(self.client):
                assert ('affinity:container==%s' % orig_container.id in
                        new_container.get('Config.Env'))
            else:
                # In Swarm, the env marker is consumed and the container should be deployed
                # on the same node.
                assert orig_container.get('Node.Name') == new_container.get('Node.Name')

            orig_container = new_container

    @v2_3_only()
    def test_execute_convergence_plan_recreate_twice_with_mount(self):
        service = self.create_service(
            'db',
            volumes=[MountSpec(target='/etc', type='volume')],
            entrypoint=['top'],
            command=['-d', '1']
        )

        orig_container = service.create_container()
        service.start_container(orig_container)

        orig_container.inspect()  # reload volume data
        volume_path = orig_container.get_mount('/etc')['Source']

        # Do this twice to reproduce the bug
        for _ in range(2):
            new_container, = service.execute_convergence_plan(
                ConvergencePlan('recreate', [orig_container])
            )

            assert new_container.get_mount('/etc')['Source'] == volume_path
            if not is_cluster(self.client):
                assert ('affinity:container==%s' % orig_container.id in
                        new_container.get('Config.Env'))
            else:
                # In Swarm, the env marker is consumed and the container should be deployed
                # on the same node.
                assert orig_container.get('Node.Name') == new_container.get('Node.Name')

            orig_container = new_container

    def test_execute_convergence_plan_when_containers_are_stopped(self):
        service = self.create_service(
            'db',
            environment={'FOO': '1'},
            volumes=[VolumeSpec.parse('/var/db')],
            entrypoint=['top'],
            command=['-d', '1']
        )
        service.create_container()

        containers = service.containers(stopped=True)
        assert len(containers) == 1
        container, = containers
        assert not container.is_running

        service.execute_convergence_plan(ConvergencePlan('start', [container]))

        containers = service.containers()
        assert len(containers) == 1
        container.inspect()
        assert container == containers[0]
        assert container.is_running

    def test_execute_convergence_plan_with_image_declared_volume(self):
        service = Service(
            project='composetest',
            name='db',
            client=self.client,
            build={'context': 'tests/fixtures/dockerfile-with-volume'},
        )

        old_container = create_and_start_container(service)
        assert [mount['Destination'] for mount in old_container.get('Mounts')] == ['/data']
        volume_path = old_container.get_mount('/data')['Source']

        new_container, = service.execute_convergence_plan(
            ConvergencePlan('recreate', [old_container]))

        assert [mount['Destination'] for mount in new_container.get('Mounts')] == ['/data']
        assert new_container.get_mount('/data')['Source'] == volume_path

    def test_execute_convergence_plan_when_image_volume_masks_config(self):
        service = self.create_service(
            'db',
            build={'context': 'tests/fixtures/dockerfile-with-volume'},
        )

        old_container = create_and_start_container(service)
        assert [mount['Destination'] for mount in old_container.get('Mounts')] == ['/data']
        volume_path = old_container.get_mount('/data')['Source']

        service.options['volumes'] = [VolumeSpec.parse('/tmp:/data')]

        with mock.patch('compose.service.log') as mock_log:
            new_container, = service.execute_convergence_plan(
                ConvergencePlan('recreate', [old_container]))

        mock_log.warn.assert_called_once_with(mock.ANY)
        _, args, kwargs = mock_log.warn.mock_calls[0]
        assert "Service \"db\" is using volume \"/data\" from the previous container" in args[0]

        assert [mount['Destination'] for mount in new_container.get('Mounts')] == ['/data']
        assert new_container.get_mount('/data')['Source'] == volume_path

    def test_execute_convergence_plan_when_host_volume_is_removed(self):
        host_path = '/tmp/host-path'
        service = self.create_service(
            'db',
            build={'context': 'tests/fixtures/dockerfile-with-volume'},
            volumes=[VolumeSpec(host_path, '/data', 'rw')])

        old_container = create_and_start_container(service)
        assert (
            [mount['Destination'] for mount in old_container.get('Mounts')] ==
            ['/data']
        )
        service.options['volumes'] = []

        with mock.patch('compose.service.log', autospec=True) as mock_log:
            new_container, = service.execute_convergence_plan(
                ConvergencePlan('recreate', [old_container]))

        assert not mock_log.warn.called
        assert (
            [mount['Destination'] for mount in new_container.get('Mounts')] ==
            ['/data']
        )
        assert new_container.get_mount('/data')['Source'] != host_path

    def test_execute_convergence_plan_without_start(self):
        service = self.create_service(
            'db',
            build={'context': 'tests/fixtures/dockerfile-with-volume'}
        )

        containers = service.execute_convergence_plan(ConvergencePlan('create', []), start=False)
        service_containers = service.containers(stopped=True)
        assert len(service_containers) == 1
        assert not service_containers[0].is_running

        containers = service.execute_convergence_plan(
            ConvergencePlan('recreate', containers),
            start=False)
        service_containers = service.containers(stopped=True)
        assert len(service_containers) == 1
        assert not service_containers[0].is_running

        service.execute_convergence_plan(ConvergencePlan('start', containers), start=False)
        service_containers = service.containers(stopped=True)
        assert len(service_containers) == 1
        assert not service_containers[0].is_running

    def test_start_container_passes_through_options(self):
        db = self.create_service('db')
        create_and_start_container(db, environment={'FOO': 'BAR'})
        assert db.containers()[0].environment['FOO'] == 'BAR'

    def test_start_container_inherits_options_from_constructor(self):
        db = self.create_service('db', environment={'FOO': 'BAR'})
        create_and_start_container(db)
        assert db.containers()[0].environment['FOO'] == 'BAR'

    @no_cluster('No legacy links support in Swarm')
    def test_start_container_creates_links(self):
        db = self.create_service('db')
        web = self.create_service('web', links=[(db, None)])

        create_and_start_container(db)
        create_and_start_container(db)
        create_and_start_container(web)

        assert set(get_links(web.containers()[0])) == set([
            'composetest_db_1', 'db_1',
            'composetest_db_2', 'db_2',
            'db'
        ])

    @no_cluster('No legacy links support in Swarm')
    def test_start_container_creates_links_with_names(self):
        db = self.create_service('db')
        web = self.create_service('web', links=[(db, 'custom_link_name')])

        create_and_start_container(db)
        create_and_start_container(db)
        create_and_start_container(web)

        assert set(get_links(web.containers()[0])) == set([
            'composetest_db_1', 'db_1',
            'composetest_db_2', 'db_2',
            'custom_link_name'
        ])

    @no_cluster('No legacy links support in Swarm')
    def test_start_container_with_external_links(self):
        db = self.create_service('db')
        web = self.create_service('web', external_links=['composetest_db_1',
                                                         'composetest_db_2',
                                                         'composetest_db_3:db_3'])

        for _ in range(3):
            create_and_start_container(db)
        create_and_start_container(web)

        assert set(get_links(web.containers()[0])) == set([
            'composetest_db_1',
            'composetest_db_2',
            'db_3'
        ])

    @no_cluster('No legacy links support in Swarm')
    def test_start_normal_container_does_not_create_links_to_its_own_service(self):
        db = self.create_service('db')

        create_and_start_container(db)
        create_and_start_container(db)

        c = create_and_start_container(db)
        assert set(get_links(c)) == set([])

    @no_cluster('No legacy links support in Swarm')
    def test_start_one_off_container_creates_links_to_its_own_service(self):
        db = self.create_service('db')

        create_and_start_container(db)
        create_and_start_container(db)

        c = create_and_start_container(db, one_off=OneOffFilter.only)

        assert set(get_links(c)) == set([
            'composetest_db_1', 'db_1',
            'composetest_db_2', 'db_2',
            'db'
        ])

    def test_start_container_builds_images(self):
        service = Service(
            name='test',
            client=self.client,
            build={'context': 'tests/fixtures/simple-dockerfile'},
            project='composetest',
        )
        container = create_and_start_container(service)
        container.wait()
        assert b'success' in container.logs()
        assert len(self.client.images(name='composetest_test')) >= 1

    def test_start_container_uses_tagged_image_if_it_exists(self):
        self.check_build('tests/fixtures/simple-dockerfile', tag='composetest_test')
        service = Service(
            name='test',
            client=self.client,
            build={'context': 'this/does/not/exist/and/will/throw/error'},
            project='composetest',
        )
        container = create_and_start_container(service)
        container.wait()
        assert b'success' in container.logs()

    def test_start_container_creates_ports(self):
        service = self.create_service('web', ports=[8000])
        container = create_and_start_container(service).inspect()
        assert list(container['NetworkSettings']['Ports'].keys()) == ['8000/tcp']
        assert container['NetworkSettings']['Ports']['8000/tcp'][0]['HostPort'] != '8000'

    def test_build(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")

        service = self.create_service('web', build={'context': base_dir})
        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)

        assert self.client.inspect_image('composetest_web')

    def test_build_non_ascii_filename(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")

        with open(os.path.join(base_dir.encode('utf8'), b'foo\xE2bar'), 'w') as f:
            f.write("hello world\n")

        service = self.create_service('web', build={'context': text_type(base_dir)})
        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)
        assert self.client.inspect_image('composetest_web')

    def test_build_with_image_name(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")

        image_name = 'examples/composetest:latest'
        self.addCleanup(self.client.remove_image, image_name)
        self.create_service('web', build={'context': base_dir}, image=image_name).build()
        assert self.client.inspect_image(image_name)

    def test_build_with_git_url(self):
        build_url = "https://github.com/dnephin/docker-build-from-url.git"
        service = self.create_service('buildwithurl', build={'context': build_url})
        self.addCleanup(self.client.remove_image, service.image_name)
        service.build()
        assert service.image()

    def test_build_with_build_args(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")
            f.write("ARG build_version\n")
            f.write("RUN echo ${build_version}\n")

        service = self.create_service('buildwithargs',
                                      build={'context': text_type(base_dir),
                                             'args': {"build_version": "1"}})
        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)
        assert service.image()
        assert "build_version=1" in service.image()['ContainerConfig']['Cmd']

    def test_build_with_build_args_override(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")
            f.write("ARG build_version\n")
            f.write("RUN echo ${build_version}\n")

        service = self.create_service('buildwithargs',
                                      build={'context': text_type(base_dir),
                                             'args': {"build_version": "1"}})
        service.build(build_args_override={'build_version': '2'})
        self.addCleanup(self.client.remove_image, service.image_name)

        assert service.image()
        assert "build_version=2" in service.image()['ContainerConfig']['Cmd']

    def test_build_with_build_labels(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write('FROM busybox\n')

        service = self.create_service('buildlabels', build={
            'context': text_type(base_dir),
            'labels': {'com.docker.compose.test': 'true'}
        })
        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)

        assert service.image()
        assert service.image()['Config']['Labels']['com.docker.compose.test'] == 'true'

    @no_cluster('Container networks not on Swarm')
    def test_build_with_network(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)
        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write('FROM busybox\n')
            f.write('RUN ping -c1 google.local\n')

        net_container = self.client.create_container(
            'busybox', 'top', host_config=self.client.create_host_config(
                extra_hosts={'google.local': '127.0.0.1'}
            ), name='composetest_build_network'
        )

        self.addCleanup(self.client.remove_container, net_container, force=True)
        self.client.start(net_container)

        service = self.create_service('buildwithnet', build={
            'context': text_type(base_dir),
            'network': 'container:{}'.format(net_container['Id'])
        })

        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)

        assert service.image()

    @v2_3_only()
    @no_cluster('Not supported on UCP 2.2.0-beta1')  # FIXME: remove once support is added
    def test_build_with_target(self):
        self.require_api_version('1.30')
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write('FROM busybox as one\n')
            f.write('LABEL com.docker.compose.test=true\n')
            f.write('LABEL com.docker.compose.test.target=one\n')
            f.write('FROM busybox as two\n')
            f.write('LABEL com.docker.compose.test.target=two\n')

        service = self.create_service('buildtarget', build={
            'context': text_type(base_dir),
            'target': 'one'
        })

        service.build()
        assert service.image()
        assert service.image()['Config']['Labels']['com.docker.compose.test.target'] == 'one'

    @v2_3_only()
    def test_build_with_extra_hosts(self):
        self.require_api_version('1.27')
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write('\n'.join([
                'FROM busybox',
                'RUN ping -c1 foobar',
                'RUN ping -c1 baz',
            ]))

        service = self.create_service('build_extra_hosts', build={
            'context': text_type(base_dir),
            'extra_hosts': {
                'foobar': '127.0.0.1',
                'baz': '127.0.0.1'
            }
        })
        service.build()
        assert service.image()

    def test_start_container_stays_unprivileged(self):
        service = self.create_service('web')
        container = create_and_start_container(service).inspect()
        assert container['HostConfig']['Privileged'] is False

    def test_start_container_becomes_privileged(self):
        service = self.create_service('web', privileged=True)
        container = create_and_start_container(service).inspect()
        assert container['HostConfig']['Privileged'] is True

    def test_expose_does_not_publish_ports(self):
        service = self.create_service('web', expose=["8000"])
        container = create_and_start_container(service).inspect()
        assert container['NetworkSettings']['Ports'] == {'8000/tcp': None}

    def test_start_container_creates_port_with_explicit_protocol(self):
        service = self.create_service('web', ports=['8000/udp'])
        container = create_and_start_container(service).inspect()
        assert list(container['NetworkSettings']['Ports'].keys()) == ['8000/udp']

    def test_start_container_creates_fixed_external_ports(self):
        service = self.create_service('web', ports=['8000:8000'])
        container = create_and_start_container(service).inspect()
        assert '8000/tcp' in container['NetworkSettings']['Ports']
        assert container['NetworkSettings']['Ports']['8000/tcp'][0]['HostPort'] == '8000'

    def test_start_container_creates_fixed_external_ports_when_it_is_different_to_internal_port(self):
        service = self.create_service('web', ports=['8001:8000'])
        container = create_and_start_container(service).inspect()
        assert '8000/tcp' in container['NetworkSettings']['Ports']
        assert container['NetworkSettings']['Ports']['8000/tcp'][0]['HostPort'] == '8001'

    def test_port_with_explicit_interface(self):
        service = self.create_service('web', ports=[
            '127.0.0.1:8001:8000',
            '0.0.0.0:9001:9000/udp',
        ])
        container = create_and_start_container(service).inspect()
        assert container['NetworkSettings']['Ports']['8000/tcp'] == [{
            'HostIp': '127.0.0.1',
            'HostPort': '8001',
        }]
        assert container['NetworkSettings']['Ports']['9000/udp'][0]['HostPort'] == '9001'
        if not is_cluster(self.client):
            assert container['NetworkSettings']['Ports']['9000/udp'][0]['HostIp'] == '0.0.0.0'
        # self.assertEqual(container['NetworkSettings']['Ports'], {
        #     '8000/tcp': [
        #         {
        #             'HostIp': '127.0.0.1',
        #             'HostPort': '8001',
        #         },
        #     ],
        #     '9000/udp': [
        #         {
        #             'HostIp': '0.0.0.0',
        #             'HostPort': '9001',
        #         },
        #     ],
        # })

    def test_create_with_image_id(self):
        # Get image id for the current busybox:latest
        pull_busybox(self.client)
        image_id = self.client.inspect_image('busybox:latest')['Id'][:12]
        service = self.create_service('foo', image=image_id)
        service.create_container()

    def test_scale(self):
        service = self.create_service('web')
        service.scale(1)
        assert len(service.containers()) == 1

        # Ensure containers don't have stdout or stdin connected
        container = service.containers()[0]
        config = container.inspect()['Config']
        assert not config['AttachStderr']
        assert not config['AttachStdout']
        assert not config['AttachStdin']

        service.scale(3)
        assert len(service.containers()) == 3
        service.scale(1)
        assert len(service.containers()) == 1
        service.scale(0)
        assert len(service.containers()) == 0

    @pytest.mark.skipif(
        SWARM_SKIP_CONTAINERS_ALL,
        reason='Swarm /containers/json bug'
    )
    def test_scale_with_stopped_containers(self):
        """
        Given there are some stopped containers and scale is called with a
        desired number that is the same as the number of stopped containers,
        test that those containers are restarted and not removed/recreated.
        """
        service = self.create_service('web')
        next_number = service._next_container_number()
        valid_numbers = [next_number, next_number + 1]
        service.create_container(number=next_number)
        service.create_container(number=next_number + 1)

        with mock.patch('sys.stderr', new_callable=StringIO) as mock_stderr:
            service.scale(2)
        for container in service.containers():
            assert container.is_running
            assert container.number in valid_numbers

        captured_output = mock_stderr.getvalue()
        assert 'Creating' not in captured_output
        assert 'Starting' in captured_output

    def test_scale_with_stopped_containers_and_needing_creation(self):
        """
        Given there are some stopped containers and scale is called with a
        desired number that is greater than the number of stopped containers,
        test that those containers are restarted and required number are created.
        """
        service = self.create_service('web')
        next_number = service._next_container_number()
        service.create_container(number=next_number, quiet=True)

        for container in service.containers():
            assert not container.is_running

        with mock.patch('sys.stderr', new_callable=StringIO) as mock_stderr:
            service.scale(2)

        assert len(service.containers()) == 2
        for container in service.containers():
            assert container.is_running

        captured_output = mock_stderr.getvalue()
        assert 'Creating' in captured_output
        assert 'Starting' in captured_output

    def test_scale_with_api_error(self):
        """Test that when scaling if the API returns an error, that error is handled
        and the remaining threads continue.
        """
        service = self.create_service('web')
        next_number = service._next_container_number()
        service.create_container(number=next_number, quiet=True)

        with mock.patch(
            'compose.container.Container.create',
            side_effect=APIError(
                message="testing",
                response={},
                explanation="Boom")):
            with mock.patch('sys.stderr', new_callable=StringIO) as mock_stderr:
                with pytest.raises(OperationFailedError):
                    service.scale(3)

        assert len(service.containers()) == 1
        assert service.containers()[0].is_running
        assert (
            "ERROR: for composetest_web_2  Cannot create container for service"
            " web: Boom" in mock_stderr.getvalue()
        )

    def test_scale_with_unexpected_exception(self):
        """Test that when scaling if the API returns an error, that is not of type
        APIError, that error is re-raised.
        """
        service = self.create_service('web')
        next_number = service._next_container_number()
        service.create_container(number=next_number, quiet=True)

        with mock.patch(
            'compose.container.Container.create',
            side_effect=ValueError("BOOM")
        ):
            with pytest.raises(ValueError):
                service.scale(3)

        assert len(service.containers()) == 1
        assert service.containers()[0].is_running

    @mock.patch('compose.service.log')
    def test_scale_with_desired_number_already_achieved(self, mock_log):
        """
        Test that calling scale with a desired number that is equal to the
        number of containers already running results in no change.
        """
        service = self.create_service('web')
        next_number = service._next_container_number()
        container = service.create_container(number=next_number, quiet=True)
        container.start()

        container.inspect()
        assert container.is_running
        assert len(service.containers()) == 1

        service.scale(1)
        assert len(service.containers()) == 1
        container.inspect()
        assert container.is_running

        captured_output = mock_log.info.call_args[0]
        assert 'Desired container number already achieved' in captured_output

    @mock.patch('compose.service.log')
    def test_scale_with_custom_container_name_outputs_warning(self, mock_log):
        """Test that calling scale on a service that has a custom container name
        results in warning output.
        """
        service = self.create_service('app', container_name='custom-container')
        assert service.custom_container_name == 'custom-container'

        with pytest.raises(OperationFailedError):
            service.scale(3)

        captured_output = mock_log.warn.call_args[0][0]

        assert len(service.containers()) == 1
        assert "Remove the custom name to scale the service." in captured_output

    def test_scale_sets_ports(self):
        service = self.create_service('web', ports=['8000'])
        service.scale(2)
        containers = service.containers()
        assert len(containers) == 2
        for container in containers:
            assert list(container.get('HostConfig.PortBindings')) == ['8000/tcp']

    def test_scale_with_immediate_exit(self):
        service = self.create_service('web', image='busybox', command='true')
        service.scale(2)
        assert len(service.containers(stopped=True)) == 2

    def test_network_mode_none(self):
        service = self.create_service('web', network_mode=NetworkMode('none'))
        container = create_and_start_container(service)
        assert container.get('HostConfig.NetworkMode') == 'none'

    def test_network_mode_bridged(self):
        service = self.create_service('web', network_mode=NetworkMode('bridge'))
        container = create_and_start_container(service)
        assert container.get('HostConfig.NetworkMode') == 'bridge'

    def test_network_mode_host(self):
        service = self.create_service('web', network_mode=NetworkMode('host'))
        container = create_and_start_container(service)
        assert container.get('HostConfig.NetworkMode') == 'host'

    def test_pid_mode_none_defined(self):
        service = self.create_service('web', pid_mode=None)
        container = create_and_start_container(service)
        assert container.get('HostConfig.PidMode') == ''

    def test_pid_mode_host(self):
        service = self.create_service('web', pid_mode=PidMode('host'))
        container = create_and_start_container(service)
        assert container.get('HostConfig.PidMode') == 'host'

    @v2_1_only()
    def test_userns_mode_none_defined(self):
        service = self.create_service('web', userns_mode=None)
        container = create_and_start_container(service)
        assert container.get('HostConfig.UsernsMode') == ''

    @v2_1_only()
    def test_userns_mode_host(self):
        service = self.create_service('web', userns_mode='host')
        container = create_and_start_container(service)
        assert container.get('HostConfig.UsernsMode') == 'host'

    def test_dns_no_value(self):
        service = self.create_service('web')
        container = create_and_start_container(service)
        assert container.get('HostConfig.Dns') is None

    def test_dns_list(self):
        service = self.create_service('web', dns=['8.8.8.8', '9.9.9.9'])
        container = create_and_start_container(service)
        assert container.get('HostConfig.Dns') == ['8.8.8.8', '9.9.9.9']

    def test_mem_swappiness(self):
        service = self.create_service('web', mem_swappiness=11)
        container = create_and_start_container(service)
        assert container.get('HostConfig.MemorySwappiness') == 11

    def test_mem_reservation(self):
        service = self.create_service('web', mem_reservation='20m')
        container = create_and_start_container(service)
        assert container.get('HostConfig.MemoryReservation') == 20 * 1024 * 1024

    def test_restart_always_value(self):
        service = self.create_service('web', restart={'Name': 'always'})
        container = create_and_start_container(service)
        assert container.get('HostConfig.RestartPolicy.Name') == 'always'

    def test_oom_score_adj_value(self):
        service = self.create_service('web', oom_score_adj=500)
        container = create_and_start_container(service)
        assert container.get('HostConfig.OomScoreAdj') == 500

    def test_group_add_value(self):
        service = self.create_service('web', group_add=["root", "1"])
        container = create_and_start_container(service)

        host_container_groupadd = container.get('HostConfig.GroupAdd')
        assert "root" in host_container_groupadd
        assert "1" in host_container_groupadd

    def test_dns_opt_value(self):
        service = self.create_service('web', dns_opt=["use-vc", "no-tld-query"])
        container = create_and_start_container(service)

        dns_opt = container.get('HostConfig.DnsOptions')
        assert 'use-vc' in dns_opt
        assert 'no-tld-query' in dns_opt

    def test_restart_on_failure_value(self):
        service = self.create_service('web', restart={
            'Name': 'on-failure',
            'MaximumRetryCount': 5
        })
        container = create_and_start_container(service)
        assert container.get('HostConfig.RestartPolicy.Name') == 'on-failure'
        assert container.get('HostConfig.RestartPolicy.MaximumRetryCount') == 5

    def test_cap_add_list(self):
        service = self.create_service('web', cap_add=['SYS_ADMIN', 'NET_ADMIN'])
        container = create_and_start_container(service)
        assert container.get('HostConfig.CapAdd') == ['SYS_ADMIN', 'NET_ADMIN']

    def test_cap_drop_list(self):
        service = self.create_service('web', cap_drop=['SYS_ADMIN', 'NET_ADMIN'])
        container = create_and_start_container(service)
        assert container.get('HostConfig.CapDrop') == ['SYS_ADMIN', 'NET_ADMIN']

    def test_dns_search(self):
        service = self.create_service('web', dns_search=['dc1.example.com', 'dc2.example.com'])
        container = create_and_start_container(service)
        assert container.get('HostConfig.DnsSearch') == ['dc1.example.com', 'dc2.example.com']

    @v2_only()
    def test_tmpfs(self):
        service = self.create_service('web', tmpfs=['/run'])
        container = create_and_start_container(service)
        assert container.get('HostConfig.Tmpfs') == {'/run': ''}

    def test_working_dir_param(self):
        service = self.create_service('container', working_dir='/working/dir/sample')
        container = service.create_container()
        assert container.get('Config.WorkingDir') == '/working/dir/sample'

    def test_split_env(self):
        service = self.create_service(
            'web',
            environment=['NORMAL=F1', 'CONTAINS_EQUALS=F=2', 'TRAILING_EQUALS='])
        env = create_and_start_container(service).environment
        for k, v in {'NORMAL': 'F1', 'CONTAINS_EQUALS': 'F=2', 'TRAILING_EQUALS': ''}.items():
            assert env[k] == v

    def test_env_from_file_combined_with_env(self):
        service = self.create_service(
            'web',
            environment=['ONE=1', 'TWO=2', 'THREE=3'],
            env_file=['tests/fixtures/env/one.env', 'tests/fixtures/env/two.env'])
        env = create_and_start_container(service).environment
        for k, v in {
            'ONE': '1',
            'TWO': '2',
            'THREE': '3',
            'FOO': 'baz',
            'DOO': 'dah'
        }.items():
            assert env[k] == v

    @v3_only()
    def test_build_with_cachefrom(self):
        base_dir = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, base_dir)

        with open(os.path.join(base_dir, 'Dockerfile'), 'w') as f:
            f.write("FROM busybox\n")

        service = self.create_service('cache_from',
                                      build={'context': base_dir,
                                             'cache_from': ['build1']})
        service.build()
        self.addCleanup(self.client.remove_image, service.image_name)

        assert service.image()

    @mock.patch.dict(os.environ)
    def test_resolve_env(self):
        os.environ['FILE_DEF'] = 'E1'
        os.environ['FILE_DEF_EMPTY'] = 'E2'
        os.environ['ENV_DEF'] = 'E3'
        service = self.create_service(
            'web',
            environment={
                'FILE_DEF': 'F1',
                'FILE_DEF_EMPTY': '',
                'ENV_DEF': None,
                'NO_DEF': None
            }
        )
        env = create_and_start_container(service).environment
        for k, v in {
            'FILE_DEF': 'F1',
            'FILE_DEF_EMPTY': '',
            'ENV_DEF': 'E3',
            'NO_DEF': None
        }.items():
            assert env[k] == v

    def test_with_high_enough_api_version_we_get_default_network_mode(self):
        # TODO: remove this test once minimum docker version is 1.8.x
        with mock.patch.object(self.client, '_version', '1.20'):
            service = self.create_service('web')
            service_config = service._get_container_host_config({})
            assert service_config['NetworkMode'] == 'default'

    def test_labels(self):
        labels_dict = {
            'com.example.description': "Accounting webapp",
            'com.example.department': "Finance",
            'com.example.label-with-empty-value': "",
        }

        compose_labels = {
            LABEL_CONTAINER_NUMBER: '1',
            LABEL_ONE_OFF: 'False',
            LABEL_PROJECT: 'composetest',
            LABEL_SERVICE: 'web',
            LABEL_VERSION: __version__,
        }
        expected = dict(labels_dict, **compose_labels)

        service = self.create_service('web', labels=labels_dict)
        labels = create_and_start_container(service).labels.items()
        for pair in expected.items():
            assert pair in labels

    def test_empty_labels(self):
        labels_dict = {'foo': '', 'bar': ''}
        service = self.create_service('web', labels=labels_dict)
        labels = create_and_start_container(service).labels.items()
        for name in labels_dict:
            assert (name, '') in labels

    def test_stop_signal(self):
        stop_signal = 'SIGINT'
        service = self.create_service('web', stop_signal=stop_signal)
        container = create_and_start_container(service)
        assert container.stop_signal == stop_signal

    def test_custom_container_name(self):
        service = self.create_service('web', container_name='my-web-container')
        assert service.custom_container_name == 'my-web-container'

        container = create_and_start_container(service)
        assert container.name == 'my-web-container'

        one_off_container = service.create_container(one_off=True)
        assert one_off_container.name != 'my-web-container'

    @pytest.mark.skipif(True, reason="Broken on 1.11.0 - 17.03.0")
    def test_log_drive_invalid(self):
        service = self.create_service('web', logging={'driver': 'xxx'})
        expected_error_msg = "logger: no log driver named 'xxx' is registered"

        with pytest.raises(APIError) as excinfo:
            create_and_start_container(service)
        assert re.search(expected_error_msg, excinfo.value)

    def test_log_drive_empty_default_jsonfile(self):
        service = self.create_service('web')
        log_config = create_and_start_container(service).log_config

        assert 'json-file' == log_config['Type']
        assert not log_config['Config']

    def test_log_drive_none(self):
        service = self.create_service('web', logging={'driver': 'none'})
        log_config = create_and_start_container(service).log_config

        assert 'none' == log_config['Type']
        assert not log_config['Config']

    def test_devices(self):
        service = self.create_service('web', devices=["/dev/random:/dev/mapped-random"])
        device_config = create_and_start_container(service).get('HostConfig.Devices')

        device_dict = {
            'PathOnHost': '/dev/random',
            'CgroupPermissions': 'rwm',
            'PathInContainer': '/dev/mapped-random'
        }

        assert 1 == len(device_config)
        assert device_dict == device_config[0]

    def test_duplicate_containers(self):
        service = self.create_service('web')

        options = service._get_container_create_options({}, 1)
        original = Container.create(service.client, **options)

        assert set(service.containers(stopped=True)) == set([original])
        assert set(service.duplicate_containers()) == set()

        options['name'] = 'temporary_container_name'
        duplicate = Container.create(service.client, **options)

        assert set(service.containers(stopped=True)) == set([original, duplicate])
        assert set(service.duplicate_containers()) == set([duplicate])


def converge(service, strategy=ConvergenceStrategy.changed):
    """Create a converge plan from a strategy and execute the plan."""
    plan = service.convergence_plan(strategy)
    return service.execute_convergence_plan(plan, timeout=1)


class ConfigHashTest(DockerClientTestCase):

    def test_no_config_hash_when_one_off(self):
        web = self.create_service('web')
        container = web.create_container(one_off=True)
        assert LABEL_CONFIG_HASH not in container.labels

    def test_no_config_hash_when_overriding_options(self):
        web = self.create_service('web')
        container = web.create_container(environment={'FOO': '1'})
        assert LABEL_CONFIG_HASH not in container.labels

    def test_config_hash_with_custom_labels(self):
        web = self.create_service('web', labels={'foo': '1'})
        container = converge(web)[0]
        assert LABEL_CONFIG_HASH in container.labels
        assert 'foo' in container.labels

    def test_config_hash_sticks_around(self):
        web = self.create_service('web', command=["top"])
        container = converge(web)[0]
        assert LABEL_CONFIG_HASH in container.labels

        web = self.create_service('web', command=["top", "-d", "1"])
        container = converge(web)[0]
        assert LABEL_CONFIG_HASH in container.labels