def test_unhealthy_app_can_be_rolled_back():
"""Verifies that an updated app gets rolled back due to being unhealthy."""
app_def = apps.readiness_and_health_app()
app_id = app_def["id"]
@retrying.retry(
wait_fixed=1000,
stop_max_attempt_number=30,
retry_on_exception=common.ignore_provided_exception(DCOSException)
)
def wait_for_deployment():
deployment_wait(service_id=app_id)
client = marathon.create_client()
client.add_app(app_def)
wait_for_deployment()
tasks = client.get_tasks(app_id)
assert len(tasks) == 1, "The number of tasks is {} after deployment, but 1 was expected".format(len(tasks))
app_def['healthChecks'][0]['path'] = '/non-existent'
app_def['instances'] = 2
deployment_id = client.update_app(app_id, app_def)
try:
wait_for_deployment()
except Exception:
client.rollback_deployment(deployment_id)
wait_for_deployment()
tasks = client.get_tasks(app_id)
assert len(tasks) == 1, "The number of tasks is {} after rollback, but 1 was expected".format(len(tasks))
def test_unhealthy_app_can_be_rolled_back():
"""Verifies that an updated app gets rolled back due to being unhealthy."""
app_def = apps.readiness_and_health_app()
app_id = app_def["id"]
@retrying.retry(
wait_fixed=1000,
stop_max_attempt_number=30,
retry_on_exception=common.ignore_provided_exception(DCOSException)
)
def wait_for_deployment():
shakedown.deployment_wait()
client = marathon.create_client()
client.add_app(app_def)
wait_for_deployment()
tasks = client.get_tasks(app_id)
assert len(tasks) == 1, "The number of tasks is {} after deployment, but 1 was expected".format(len(tasks))
app_def['healthChecks'][0]['path'] = '/non-existent'
app_def['instances'] = 2
deployment_id = client.update_app(app_id, app_def)
try:
wait_for_deployment()
except Exception:
client.rollback_deployment(deployment_id)
wait_for_deployment()
tasks = client.get_tasks(app_id)
assert len(tasks) == 1, "The number of tasks is {} after rollback, but 1 was expected".format(len(tasks))