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309 lines
10 KiB
Python
309 lines
10 KiB
Python
"""
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Integration tests which cover state convergence (aka smart recreate) performed
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by `docker-compose up`.
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"""
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from __future__ import absolute_import
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from __future__ import unicode_literals
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import py
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from docker.errors import ImageNotFound
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from .testcases import DockerClientTestCase
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from .testcases import get_links
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from .testcases import no_cluster
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from compose.config import config
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from compose.project import Project
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from compose.service import ConvergenceStrategy
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class ProjectTestCase(DockerClientTestCase):
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def run_up(self, cfg, **kwargs):
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kwargs.setdefault('timeout', 1)
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kwargs.setdefault('detached', True)
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project = self.make_project(cfg)
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project.up(**kwargs)
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return set(project.containers(stopped=True))
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def make_project(self, cfg):
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details = config.ConfigDetails(
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'working_dir',
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[config.ConfigFile(None, cfg)])
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return Project.from_config(
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name='composetest',
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client=self.client,
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config_data=config.load(details))
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class BasicProjectTest(ProjectTestCase):
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def setUp(self):
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super(BasicProjectTest, self).setUp()
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self.cfg = {
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'db': {'image': 'busybox:latest', 'command': 'top'},
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'web': {'image': 'busybox:latest', 'command': 'top'},
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}
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def test_no_change(self):
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old_containers = self.run_up(self.cfg)
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self.assertEqual(len(old_containers), 2)
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new_containers = self.run_up(self.cfg)
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self.assertEqual(len(new_containers), 2)
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self.assertEqual(old_containers, new_containers)
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def test_partial_change(self):
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old_containers = self.run_up(self.cfg)
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old_db = [c for c in old_containers if c.name_without_project == 'db_1'][0]
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old_web = [c for c in old_containers if c.name_without_project == 'web_1'][0]
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self.cfg['web']['command'] = '/bin/true'
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new_containers = self.run_up(self.cfg)
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self.assertEqual(len(new_containers), 2)
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preserved = list(old_containers & new_containers)
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self.assertEqual(preserved, [old_db])
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removed = list(old_containers - new_containers)
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self.assertEqual(removed, [old_web])
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created = list(new_containers - old_containers)
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self.assertEqual(len(created), 1)
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self.assertEqual(created[0].name_without_project, 'web_1')
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self.assertEqual(created[0].get('Config.Cmd'), ['/bin/true'])
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def test_all_change(self):
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old_containers = self.run_up(self.cfg)
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self.assertEqual(len(old_containers), 2)
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self.cfg['web']['command'] = '/bin/true'
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self.cfg['db']['command'] = '/bin/true'
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new_containers = self.run_up(self.cfg)
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self.assertEqual(len(new_containers), 2)
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unchanged = old_containers & new_containers
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self.assertEqual(len(unchanged), 0)
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new = new_containers - old_containers
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self.assertEqual(len(new), 2)
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class ProjectWithDependenciesTest(ProjectTestCase):
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def setUp(self):
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super(ProjectWithDependenciesTest, self).setUp()
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self.cfg = {
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'db': {
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'image': 'busybox:latest',
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'command': 'tail -f /dev/null',
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},
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'web': {
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'image': 'busybox:latest',
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'command': 'tail -f /dev/null',
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'links': ['db'],
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},
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'nginx': {
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'image': 'busybox:latest',
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'command': 'tail -f /dev/null',
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'links': ['web'],
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},
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}
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def test_up(self):
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containers = self.run_up(self.cfg)
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self.assertEqual(
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set(c.name_without_project for c in containers),
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set(['db_1', 'web_1', 'nginx_1']),
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)
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def test_change_leaf(self):
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old_containers = self.run_up(self.cfg)
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self.cfg['nginx']['environment'] = {'NEW_VAR': '1'}
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new_containers = self.run_up(self.cfg)
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self.assertEqual(
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set(c.name_without_project for c in new_containers - old_containers),
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set(['nginx_1']),
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)
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def test_change_middle(self):
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old_containers = self.run_up(self.cfg)
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self.cfg['web']['environment'] = {'NEW_VAR': '1'}
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new_containers = self.run_up(self.cfg)
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self.assertEqual(
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set(c.name_without_project for c in new_containers - old_containers),
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set(['web_1', 'nginx_1']),
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)
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def test_change_root(self):
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old_containers = self.run_up(self.cfg)
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self.cfg['db']['environment'] = {'NEW_VAR': '1'}
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new_containers = self.run_up(self.cfg)
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self.assertEqual(
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set(c.name_without_project for c in new_containers - old_containers),
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set(['db_1', 'web_1', 'nginx_1']),
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)
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def test_change_root_no_recreate(self):
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old_containers = self.run_up(self.cfg)
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self.cfg['db']['environment'] = {'NEW_VAR': '1'}
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new_containers = self.run_up(
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self.cfg,
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strategy=ConvergenceStrategy.never)
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self.assertEqual(new_containers - old_containers, set())
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def test_service_removed_while_down(self):
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next_cfg = {
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'web': {
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'image': 'busybox:latest',
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'command': 'tail -f /dev/null',
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},
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'nginx': self.cfg['nginx'],
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}
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containers = self.run_up(self.cfg)
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self.assertEqual(len(containers), 3)
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project = self.make_project(self.cfg)
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project.stop(timeout=1)
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containers = self.run_up(next_cfg)
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self.assertEqual(len(containers), 2)
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def test_service_recreated_when_dependency_created(self):
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containers = self.run_up(self.cfg, service_names=['web'], start_deps=False)
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self.assertEqual(len(containers), 1)
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containers = self.run_up(self.cfg)
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self.assertEqual(len(containers), 3)
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web, = [c for c in containers if c.service == 'web']
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nginx, = [c for c in containers if c.service == 'nginx']
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self.assertEqual(set(get_links(web)), {'composetest_db_1', 'db', 'db_1'})
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self.assertEqual(set(get_links(nginx)), {'composetest_web_1', 'web', 'web_1'})
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class ServiceStateTest(DockerClientTestCase):
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"""Test cases for Service.convergence_plan."""
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def test_trigger_create(self):
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web = self.create_service('web')
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self.assertEqual(('create', []), web.convergence_plan())
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def test_trigger_noop(self):
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web = self.create_service('web')
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container = web.create_container()
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web.start()
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web = self.create_service('web')
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self.assertEqual(('noop', [container]), web.convergence_plan())
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def test_trigger_start(self):
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options = dict(command=["top"])
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web = self.create_service('web', **options)
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web.scale(2)
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containers = web.containers(stopped=True)
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containers[0].stop()
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containers[0].inspect()
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self.assertEqual([c.is_running for c in containers], [False, True])
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self.assertEqual(
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('start', containers[0:1]),
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web.convergence_plan(),
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)
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def test_trigger_recreate_with_config_change(self):
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web = self.create_service('web', command=["top"])
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container = web.create_container()
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web = self.create_service('web', command=["top", "-d", "1"])
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self.assertEqual(('recreate', [container]), web.convergence_plan())
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def test_trigger_recreate_with_nonexistent_image_tag(self):
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web = self.create_service('web', image="busybox:latest")
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container = web.create_container()
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web = self.create_service('web', image="nonexistent-image")
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self.assertEqual(('recreate', [container]), web.convergence_plan())
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def test_trigger_recreate_with_image_change(self):
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repo = 'composetest_myimage'
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tag = 'latest'
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image = '{}:{}'.format(repo, tag)
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def safe_remove_image(image):
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try:
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self.client.remove_image(image)
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except ImageNotFound:
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pass
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image_id = self.client.images(name='busybox')[0]['Id']
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self.client.tag(image_id, repository=repo, tag=tag)
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self.addCleanup(safe_remove_image, image)
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web = self.create_service('web', image=image)
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container = web.create_container()
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# update the image
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c = self.client.create_container(image, ['touch', '/hello.txt'], host_config={})
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# In the case of a cluster, there's a chance we pick up the old image when
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# calculating the new hash. To circumvent that, untag the old image first
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# See also: https://github.com/moby/moby/issues/26852
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self.client.remove_image(image, force=True)
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self.client.commit(c, repository=repo, tag=tag)
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self.client.remove_container(c)
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web = self.create_service('web', image=image)
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self.assertEqual(('recreate', [container]), web.convergence_plan())
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@no_cluster('Can not guarantee the build will be run on the same node the service is deployed')
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def test_trigger_recreate_with_build(self):
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context = py.test.ensuretemp('test_trigger_recreate_with_build')
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self.addCleanup(context.remove)
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base_image = "FROM busybox\nLABEL com.docker.compose.test_image=true\n"
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dockerfile = context.join('Dockerfile')
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dockerfile.write(base_image)
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web = self.create_service('web', build={'context': str(context)})
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container = web.create_container()
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dockerfile.write(base_image + 'CMD echo hello world\n')
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web.build()
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web = self.create_service('web', build={'context': str(context)})
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self.assertEqual(('recreate', [container]), web.convergence_plan())
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def test_image_changed_to_build(self):
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context = py.test.ensuretemp('test_image_changed_to_build')
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self.addCleanup(context.remove)
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context.join('Dockerfile').write("""
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FROM busybox
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LABEL com.docker.compose.test_image=true
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""")
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web = self.create_service('web', image='busybox')
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container = web.create_container()
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web = self.create_service('web', build={'context': str(context)})
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plan = web.convergence_plan()
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self.assertEqual(('recreate', [container]), plan)
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containers = web.execute_convergence_plan(plan)
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self.assertEqual(len(containers), 1)
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