def test_prepare_deploy_swap_colors():
previous_apps = _load_marathon_apps()
blue_app = _load_blue_app()
initial_instances = 5
deploy = prepare_deploy(previous_apps, blue_app, initial_instances)
assert deploy['labels']['HAPROXY_DEPLOYMENT_COLOUR'] == 'green'
assert deploy['instances'] == initial_instances
def test_prepare_deploy_first_deploy():
previous_apps = []
blue_app = _load_blue_app()
initial_instances = 5
deploy = prepare_deploy(previous_apps, blue_app, initial_instances)
assert deploy['labels']['HAPROXY_DEPLOYMENT_COLOUR'] == 'blue'
assert deploy['instances'] == blue_app['instances']
def cli(logger, marathon_client, marathon_lb_url, initial_instances, max_wait,
step_interval, force, env_prefix, template_path, template_names, env_pairs):
"""Perform a blue/green deploy
"""
values = load_values_from_environment(prefix=env_prefix, overrides=env_pairs)
rendered_templates = []
for template_name in template_names:
rendered_templates.append(render_json_template(template_path, template_name, **values))
for app in rendered_templates:
validate_app(app)
# fetch all previous deploys from marathon and abort if there is more
# than one stack currently active.
previous_deploys = fetch_previous_deploys(marathon_client, app)
if len(previous_deploys) > 1:
raise DualStackAlreadyExists("Both blue and green apps detected")
# transform the app to be deployed to apply the correct labels and
# ID-change that will allow marathon-lb to cut traffic over as necessary.
new_app = prepare_deploy(previous_deploys, app, initial_instances)
logger.log('Final App Definition:')
logger.log(json.dumps(new_app, indent=4, sort_keys=True))
if force or click.confirm("Continue with deployment?"):
try:
deploy_and_swap(marathon_client,
new_app,
previous_deploys,
logger,
force,
max_wait,
step_interval,
initial_instances,
marathon_lb_url)
except (DeploymentFailed, SwapApplicationTimeout):
remove_new_stack(marathon_client, logger, app['id'], force)
