RETIRED, Function as a Service for OpenStack
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# Copyright 2018 AWCloud Software Co., Ltd.
#
# 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.
import mock
from oslo_config import cfg
from qinling.db import api as db_api
from qinling.engine import default_engine
from qinling import exceptions as exc
from qinling import status
from qinling.tests.unit import base
from qinling.utils import common
from qinling.utils import constants
class TestDefaultEngine(base.DbTestCase):
def setUp(self):
super(TestDefaultEngine, self).setUp()
self.orchestrator = mock.Mock()
self.qinling_endpoint = 'http://127.0.0.1:7070'
self.default_engine = default_engine.DefaultEngine(
self.orchestrator, self.qinling_endpoint
)
self.rlimit = {
'cpu': cfg.CONF.resource_limits.default_cpu,
'memory_size': cfg.CONF.resource_limits.default_memory
}
def _create_running_executions(self, function_id, num):
for _ in range(num):
self.create_execution(function_id=function_id)
def test_create_runtime(self):
runtime = self.create_runtime()
runtime_id = runtime.id
# Set status to verify it is changed during creation.
db_api.update_runtime(runtime_id, {'status': status.CREATING})
self.default_engine.create_runtime(mock.Mock(), runtime_id)
self.orchestrator.create_pool.assert_called_once_with(
runtime_id, runtime.image)
runtime = db_api.get_runtime(runtime_id)
self.assertEqual(status.AVAILABLE, runtime.status)
def test_create_runtime_failed(self):
runtime = self.create_runtime()
runtime_id = runtime.id
# Set status to verify it is changed during creation.
db_api.update_runtime(runtime_id, {'status': status.CREATING})
self.orchestrator.create_pool.side_effect = RuntimeError
self.default_engine.create_runtime(mock.Mock(), runtime_id)
self.orchestrator.create_pool.assert_called_once_with(
runtime_id, runtime.image)
runtime = db_api.get_runtime(runtime_id)
self.assertEqual(status.ERROR, runtime.status)
def test_delete_runtime(self):
runtime = self.create_runtime()
runtime_id = runtime.id
self.default_engine.delete_runtime(mock.Mock(), runtime_id)
self.orchestrator.delete_pool.assert_called_once_with(
runtime_id)
self.assertRaisesRegex(
exc.DBEntityNotFoundError,
"^Runtime not found \[id=%s\]$" % runtime_id,
db_api.get_runtime, runtime_id)
def test_update_runtime(self):
runtime = self.create_runtime()
runtime_id = runtime.id
# Set status to verify it is changed during update.
db_api.update_runtime(runtime_id, {'status': status.UPGRADING})
image = self.rand_name('new_image', prefix=self.prefix)
pre_image = self.rand_name('pre_image', prefix=self.prefix)
self.orchestrator.update_pool.return_value = True
self.default_engine.update_runtime(
mock.Mock(), runtime_id, image, pre_image)
self.orchestrator.update_pool.assert_called_once_with(
runtime_id, image=image)
runtime = db_api.get_runtime(runtime_id)
self.assertEqual(runtime.status, status.AVAILABLE)
def test_update_runtime_rollbacked(self):
runtime = self.create_runtime()
runtime_id = runtime.id
# Set status to verify it is changed during update.
db_api.update_runtime(runtime_id, {'status': status.UPGRADING})
image = self.rand_name('new_image', prefix=self.prefix)
pre_image = self.rand_name('pre_image', prefix=self.prefix)
self.orchestrator.update_pool.return_value = False
self.default_engine.update_runtime(
mock.Mock(), runtime_id, image, pre_image)
self.orchestrator.update_pool.assert_called_once_with(
runtime_id, image=image)
runtime = db_api.get_runtime(runtime_id)
self.assertEqual(runtime.image, pre_image)
self.assertEqual(runtime.status, status.AVAILABLE)
@mock.patch('qinling.engine.default_engine.DefaultEngine.scaleup_function')
@mock.patch('qinling.utils.etcd_util.get_workers')
@mock.patch('qinling.utils.etcd_util.get_worker_lock')
def test_function_load_check_no_worker(self, mock_getlock, mock_getworkers,
mock_scaleup):
function_id = common.generate_unicode_uuid()
runtime_id = common.generate_unicode_uuid()
lock = mock.Mock()
lock.is_acquired.return_value = True
mock_getlock.return_value.__enter__.return_value = lock
mock_getworkers.return_value = []
self.default_engine.function_load_check(function_id, 0, runtime_id)
mock_getworkers.assert_called_once_with(function_id, 0)
mock_scaleup.assert_called_once_with(None, function_id, 0, runtime_id,
1)
@mock.patch('qinling.engine.default_engine.DefaultEngine.scaleup_function')
@mock.patch('qinling.utils.etcd_util.get_workers')
@mock.patch('qinling.utils.etcd_util.get_worker_lock')
def test_function_load_check_scaleup(self, mock_getlock, mock_getworkers,
mock_scaleup):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
lock = mock.Mock()
lock.is_acquired.return_value = True
mock_getlock.return_value.__enter__.return_value = lock
# The default concurrency is 3, we use 4 running executions against
# 1 worker so that there will be a scaling up.
mock_getworkers.return_value = ['worker1']
self._create_running_executions(function_id, 4)
self.default_engine.function_load_check(function_id, 0, runtime_id)
mock_getworkers.assert_called_once_with(function_id, 0)
mock_scaleup.assert_called_once_with(None, function_id, 0, runtime_id,
1)
@mock.patch('qinling.engine.default_engine.DefaultEngine.scaleup_function')
@mock.patch('qinling.utils.etcd_util.get_workers')
@mock.patch('qinling.utils.etcd_util.get_worker_lock')
def test_function_load_check_not_scaleup(self, mock_getlock,
mock_getworkers, mock_scaleup):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
lock = mock.Mock()
lock.is_acquired.return_value = True
mock_getlock.return_value.__enter__.return_value = lock
# The default concurrency is 3, we use 3 running executions against
# 1 worker so that there won't be a scaling up.
mock_getworkers.return_value = ['worker1']
self._create_running_executions(function_id, 3)
self.default_engine.function_load_check(function_id, 0, runtime_id)
mock_getworkers.assert_called_once_with(function_id, 0)
mock_scaleup.assert_not_called()
@mock.patch('qinling.utils.etcd_util.get_workers')
@mock.patch('qinling.utils.etcd_util.get_worker_lock')
def test_function_load_check_lock_wait(self, mock_getlock,
mock_getworkers):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
lock = mock.Mock()
mock_getlock.return_value.__enter__.return_value = lock
# Lock is acquired upon the third try.
lock.is_acquired.side_effect = [False, False, True]
mock_getworkers.return_value = ['worker1']
self._create_running_executions(function_id, 3)
self.default_engine.function_load_check(function_id, 0, runtime_id)
self.assertEqual(3, lock.is_acquired.call_count)
mock_getworkers.assert_called_once_with(function_id, 0)
@mock.patch('qinling.utils.etcd_util.get_worker_lock')
def test_function_load_check_failed_to_get_worker_lock(self, mock_getlock):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
function_version = 0
lock = mock.Mock()
# Lock is never acquired.
lock.is_acquired.return_value = False
mock_getlock.return_value.__enter__.return_value = lock
self.assertRaisesRegex(
exc.EtcdLockException,
"^Etcd: failed to get worker lock for function %s"
"\(version %s\)\.$" % (function_id, function_version),
self.default_engine.function_load_check,
function_id, function_version, runtime_id
)
@mock.patch('qinling.utils.etcd_util.get_service_url')
def test_create_execution_image_type_function(self, mock_svc_url):
"""Create 2 executions for an image type function."""
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
db_api.update_function(
function_id,
{
'code': {
'source': constants.IMAGE_FUNCTION,
'image': self.rand_name('image', prefix=self.prefix)
}
}
)
function = db_api.get_function(function_id)
execution_1 = self.create_execution(function_id=function_id)
execution_1_id = execution_1.id
execution_2 = self.create_execution(function_id=function_id)
execution_2_id = execution_2.id
mock_svc_url.return_value = None
self.orchestrator.prepare_execution.return_value = (
mock.Mock(), None)
self.orchestrator.run_execution.side_effect = [
(True, 'success result'),
(False, 'failed result')]
# Create two executions, with different results
self.default_engine.create_execution(
mock.Mock(), execution_1_id, function_id, 0, runtime_id
)
self.default_engine.create_execution(
mock.Mock(), execution_2_id, function_id, 0, runtime_id,
input='input'
)
get_service_url_calls = [
mock.call(function_id, 0), mock.call(function_id, 0)
]
mock_svc_url.assert_has_calls(get_service_url_calls)
prepare_calls = [
mock.call(function_id,
0,
rlimit=self.rlimit,
image=function.code['image'],
identifier=mock.ANY,
labels=None,
input=None),
mock.call(function_id,
0,
rlimit=self.rlimit,
image=function.code['image'],
identifier=mock.ANY,
labels=None,
input='input')
]
self.orchestrator.prepare_execution.assert_has_calls(prepare_calls)
run_calls = [
mock.call(execution_1_id,
function_id,
0,
rlimit=None,
input=None,
identifier=mock.ANY,
service_url=None,
entry=function.entry,
trust_id=function.trust_id),
mock.call(execution_2_id,
function_id,
0,
rlimit=None,
input='input',
identifier=mock.ANY,
service_url=None,
entry=function.entry,
trust_id=function.trust_id)
]
self.orchestrator.run_execution.assert_has_calls(run_calls)
execution_1 = db_api.get_execution(execution_1_id)
execution_2 = db_api.get_execution(execution_2_id)
self.assertEqual(execution_1.status, status.SUCCESS)
self.assertEqual(execution_1.logs, '')
self.assertEqual(execution_1.result, {'output': 'success result'})
self.assertEqual(execution_2.status, status.FAILED)
self.assertEqual(execution_2.logs, '')
self.assertEqual(execution_2.result, {'output': 'failed result'})
@mock.patch('qinling.utils.etcd_util.get_service_url')
def test_create_execution_prepare_execution_exception(
self,
etcd_util_get_service_url_mock
):
"""test_create_execution_prepare_execution_exception
Create execution for image type function, prepare_execution method
raises exception.
"""
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
db_api.update_function(
function_id,
{
'code': {
'source': constants.IMAGE_FUNCTION,
'image': self.rand_name('image', prefix=self.prefix)
}
}
)
function = db_api.get_function(function_id)
execution = self.create_execution(function_id=function_id)
execution_id = execution.id
prepare_execution = self.orchestrator.prepare_execution
prepare_execution.side_effect = exc.OrchestratorException(
'Exception in prepare_execution'
)
etcd_util_get_service_url_mock.return_value = None
self.default_engine.create_execution(
mock.Mock(), execution_id, function_id, 0, runtime_id)
execution = db_api.get_execution(execution_id)
self.assertEqual(execution.status, status.ERROR)
self.assertEqual(execution.logs, '')
self.assertEqual(execution.result,
{'error': 'Function execution failed.'})
@mock.patch('qinling.utils.etcd_util.get_service_url')
def test_create_execution_package_type_function(
self,
etcd_util_get_service_url_mock
):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
execution = self.create_execution(function_id=function_id)
execution_id = execution.id
self.default_engine.function_load_check = mock.Mock(return_value='')
etcd_util_get_service_url_mock.return_value = None
self.orchestrator.prepare_execution.return_value = (
mock.Mock(), 'svc_url')
self.orchestrator.run_execution.return_value = (
True,
{'success': True, 'logs': 'execution log',
'output': 'success output'})
self.default_engine.create_execution(
mock.Mock(), execution_id, function_id, 0, runtime_id)
self.default_engine.function_load_check.assert_called_once_with(
function_id, 0, runtime_id)
etcd_util_get_service_url_mock.assert_called_once_with(function_id, 0)
self.orchestrator.prepare_execution.assert_called_once_with(
function_id, 0, rlimit=self.rlimit, image=None,
identifier=runtime_id, labels={'runtime_id': runtime_id},
input=None)
self.orchestrator.run_execution.assert_called_once_with(
execution_id, function_id, 0, rlimit=self.rlimit, input=None,
identifier=runtime_id, service_url='svc_url', entry=function.entry,
trust_id=function.trust_id)
execution = db_api.get_execution(execution_id)
self.assertEqual(execution.status, status.SUCCESS)
self.assertEqual(execution.logs, 'execution log')
self.assertEqual(execution.result, {'output': 'success output'})
def test_create_execution_loadcheck_exception(self):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
execution = self.create_execution(function_id=function_id)
execution_id = execution.id
self.default_engine.function_load_check = mock.Mock(
side_effect=exc.OrchestratorException(
'Exception in scaleup_function'
)
)
self.default_engine.create_execution(
mock.Mock(), execution_id, function_id, 0, runtime_id)
execution = db_api.get_execution(execution_id)
self.assertEqual(execution.status, status.ERROR)
self.assertEqual(execution.logs, '')
self.assertEqual(execution.result,
{'error': 'Function execution failed.'})
@mock.patch('qinling.engine.utils.get_request_data')
@mock.patch('qinling.engine.utils.url_request')
@mock.patch('qinling.utils.etcd_util.get_service_url')
def test_create_execution_found_service_url(
self,
etcd_util_get_service_url_mock,
engine_utils_url_request_mock,
engine_utils_get_request_data_mock
):
function = self.create_function()
function_id = function.id
runtime_id = function.runtime_id
execution = self.create_execution(function_id=function_id)
execution_id = execution.id
self.default_engine.function_load_check = mock.Mock(return_value='')
etcd_util_get_service_url_mock.return_value = 'svc_url'
engine_utils_get_request_data_mock.return_value = 'data'
engine_utils_url_request_mock.return_value = (
False,
{'success': False, 'logs': 'execution log',
'output': 'failed output'})
self.default_engine.create_execution(
mock.Mock(), execution_id, function_id, 0, runtime_id,
input='input')
self.default_engine.function_load_check.assert_called_once_with(
function_id, 0, runtime_id)
etcd_util_get_service_url_mock.assert_called_once_with(function_id, 0)
engine_utils_get_request_data_mock.assert_called_once_with(
mock.ANY, function_id, 0, execution_id, self.rlimit,
'input', function.entry, function.trust_id,
self.qinling_endpoint)
engine_utils_url_request_mock.assert_called_once_with(
self.default_engine.session, 'svc_url/execute', body='data')
execution = db_api.get_execution(execution_id)
self.assertEqual(execution.status, status.FAILED)
self.assertEqual(execution.logs, 'execution log')
self.assertEqual(execution.result,
{'success': False, 'output': 'failed output'})
def test_delete_function(self):
function_id = common.generate_unicode_uuid()
self.default_engine.delete_function(mock.Mock(), function_id)
self.orchestrator.delete_function.assert_called_once_with(
function_id, 0
)
@mock.patch('qinling.utils.etcd_util.create_service_url')
@mock.patch('qinling.utils.etcd_util.create_worker')
def test_scaleup_function(
self,
etcd_util_create_worker_mock,
etcd_util_create_service_url_mock
):
function_id = common.generate_unicode_uuid()
runtime_id = common.generate_unicode_uuid()
self.orchestrator.scaleup_function.return_value = (['worker'], 'url')
self.default_engine.scaleup_function(
mock.Mock(), function_id, 0, runtime_id)
self.orchestrator.scaleup_function.assert_called_once_with(
function_id, 0, identifier=runtime_id, count=1)
etcd_util_create_worker_mock.assert_called_once_with(
function_id, 'worker', version=0)
etcd_util_create_service_url_mock.assert_called_once_with(
function_id, 'url', version=0)
@mock.patch('qinling.utils.etcd_util.create_service_url')
@mock.patch('qinling.utils.etcd_util.create_worker')
def test_scaleup_function_multiple_workers(
self,
etcd_util_create_worker_mock,
etcd_util_create_service_url_mock
):
function_id = common.generate_unicode_uuid()
runtime_id = common.generate_unicode_uuid()
self.orchestrator.scaleup_function.return_value = (
['worker0', 'worker1'], 'url')
self.default_engine.scaleup_function(
mock.Mock(), function_id, 0, runtime_id, count=2
)
self.orchestrator.scaleup_function.assert_called_once_with(
function_id, 0, identifier=runtime_id, count=2
)
# Two new workers are created.
expected = [mock.call(function_id, 'worker0', version=0),
mock.call(function_id, 'worker1', version=0)]
etcd_util_create_worker_mock.assert_has_calls(expected)
etcd_util_create_service_url_mock.assert_called_once_with(
function_id, 'url', version=0
)
@mock.patch('qinling.utils.etcd_util.delete_worker')
@mock.patch('qinling.utils.etcd_util.get_workers')
def test_scaledown_function(
self, etcd_util_get_workers_mock, etcd_util_delete_workers_mock
):
function_id = common.generate_unicode_uuid()
etcd_util_get_workers_mock.return_value = [
'worker_%d' % i for i in range(4)
]
self.default_engine.scaledown_function(mock.Mock(), function_id)
etcd_util_get_workers_mock.assert_called_once_with(
function_id, 0)
self.orchestrator.delete_worker.assert_called_once_with('worker_0')
etcd_util_delete_workers_mock.assert_called_once_with(
function_id, 'worker_0', version=0
)
@mock.patch('qinling.utils.etcd_util.delete_worker')
@mock.patch('qinling.utils.etcd_util.get_workers')
def test_scaledown_function_multiple_workers(
self, etcd_util_get_workers_mock, etcd_util_delete_workers_mock
):
function_id = common.generate_unicode_uuid()
etcd_util_get_workers_mock.return_value = [
'worker_%d' % i for i in range(4)
]
self.default_engine.scaledown_function(mock.Mock(), function_id,
count=2)
etcd_util_get_workers_mock.assert_called_once_with(function_id, 0)
# First two workers will be deleted.
expected = [mock.call('worker_0'), mock.call('worker_1')]
self.orchestrator.delete_worker.assert_has_calls(expected)
self.assertEqual(2, self.orchestrator.delete_worker.call_count)
expected = [
mock.call(function_id, 'worker_0', version=0),
mock.call(function_id, 'worker_1', version=0)
]
etcd_util_delete_workers_mock.assert_has_calls(expected)
self.assertEqual(2, etcd_util_delete_workers_mock.call_count)
@mock.patch('qinling.utils.etcd_util.delete_worker')
@mock.patch('qinling.utils.etcd_util.get_workers')
def test_scaledown_function_leaving_one_worker(
self, etcd_util_get_workers_mock, etcd_util_delete_workers_mock
):
function_id = common.generate_unicode_uuid()
etcd_util_get_workers_mock.return_value = [
'worker_%d' % i for i in range(4)
]
self.default_engine.scaledown_function(
mock.Mock(), function_id, count=5) # count > len(workers)
etcd_util_get_workers_mock.assert_called_once_with(function_id, 0)
# Only the first three workers will be deleted
expected = [
mock.call('worker_0'), mock.call('worker_1'), mock.call('worker_2')
]
self.orchestrator.delete_worker.assert_has_calls(expected)
self.assertEqual(3, self.orchestrator.delete_worker.call_count)
expected = [
mock.call(function_id, 'worker_0', version=0),
mock.call(function_id, 'worker_1', version=0),
mock.call(function_id, 'worker_2', version=0)
]
etcd_util_delete_workers_mock.assert_has_calls(expected)
self.assertEqual(3, etcd_util_delete_workers_mock.call_count)
def test_get_runtime_pool(self):
runtime = self.create_runtime()
runtime_id = runtime.id
self.default_engine.get_runtime_pool(mock.Mock(), runtime_id)
self.orchestrator.get_pool.assert_called_once_with(runtime_id)