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run_xds_tests.py
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#!/usr/bin/env python3
# Copyright 2020 gRPC authors.
#
# 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.
"""Run xDS integration tests on GCP using Traffic Director."""
import argparse
import datetime
import json
import logging
import os
import random
import re
import shlex
import socket
import subprocess
import sys
import tempfile
import time
import uuid
from google.protobuf import json_format
import googleapiclient.discovery
import grpc
from oauth2client.client import GoogleCredentials
import python_utils.jobset as jobset
import python_utils.report_utils as report_utils
from src.proto.grpc.health.v1 import health_pb2
from src.proto.grpc.health.v1 import health_pb2_grpc
from src.proto.grpc.testing import empty_pb2
from src.proto.grpc.testing import messages_pb2
from src.proto.grpc.testing import test_pb2_grpc
# Envoy protos provided by PyPI package xds-protos
# Needs to import the generated Python file to load descriptors
try:
from envoy.extensions.filters.common.fault.v3 import fault_pb2
from envoy.extensions.filters.http.fault.v3 import fault_pb2
from envoy.extensions.filters.http.router.v3 import router_pb2
from envoy.extensions.filters.network.http_connection_manager.v3 import \
http_connection_manager_pb2
from envoy.service.status.v3 import csds_pb2
from envoy.service.status.v3 import csds_pb2_grpc
except ImportError:
# These protos are required by CSDS test. We should not fail the entire
# script for one test case.
pass
logger = logging.getLogger()
console_handler = logging.StreamHandler()
formatter = logging.Formatter(fmt='%(asctime)s: %(levelname)-8s %(message)s')
console_handler.setFormatter(formatter)
logger.handlers = []
logger.addHandler(console_handler)
logger.setLevel(logging.WARNING)
# Suppress excessive logs for gRPC Python
original_grpc_trace = os.environ.pop('GRPC_TRACE', None)
original_grpc_verbosity = os.environ.pop('GRPC_VERBOSITY', None)
# Suppress not-essential logs for GCP clients
logging.getLogger('google_auth_httplib2').setLevel(logging.WARNING)
logging.getLogger('googleapiclient.discovery').setLevel(logging.WARNING)
_TEST_CASES = [
'backends_restart',
'change_backend_service',
'gentle_failover',
'load_report_based_failover',
'ping_pong',
'remove_instance_group',
'round_robin',
'secondary_locality_gets_no_requests_on_partial_primary_failure',
'secondary_locality_gets_requests_on_primary_failure',
'traffic_splitting',
'path_matching',
'header_matching',
'api_listener',
'forwarding_rule_port_match',
'forwarding_rule_default_port',
'metadata_filter',
]
# Valid test cases, but not in all. So the tests can only run manually, and
# aren't enabled automatically for all languages.
#
# TODO: Move them into _TEST_CASES when support is ready in all languages.
_ADDITIONAL_TEST_CASES = [
'circuit_breaking',
'timeout',
'fault_injection',
'csds',
]
# Test cases that require the V3 API. Skipped in older runs.
_V3_TEST_CASES = frozenset(['timeout', 'fault_injection', 'csds'])
# Test cases that require the alpha API. Skipped for stable API runs.
_ALPHA_TEST_CASES = frozenset(['timeout'])
def parse_test_cases(arg):
if arg == '':
return []
arg_split = arg.split(',')
test_cases = set()
all_test_cases = _TEST_CASES + _ADDITIONAL_TEST_CASES
for arg in arg_split:
if arg == "all":
test_cases = test_cases.union(_TEST_CASES)
else:
test_cases = test_cases.union([arg])
if not all([test_case in all_test_cases for test_case in test_cases]):
raise Exception('Failed to parse test cases %s' % arg)
# Perserve order.
return [x for x in all_test_cases if x in test_cases]
def parse_port_range(port_arg):
try:
port = int(port_arg)
return list(range(port, port + 1))
except:
port_min, port_max = port_arg.split(':')
return list(range(int(port_min), int(port_max) + 1))
argp = argparse.ArgumentParser(description='Run xDS interop tests on GCP')
# TODO(zdapeng): remove default value of project_id and project_num
argp.add_argument('--project_id', default='grpc-testing', help='GCP project id')
argp.add_argument('--project_num',
default='830293263384',
help='GCP project number')
argp.add_argument(
'--gcp_suffix',
default='',
help='Optional suffix for all generated GCP resource names. Useful to '
'ensure distinct names across test runs.')
argp.add_argument(
'--test_case',
default='ping_pong',
type=parse_test_cases,
help='Comma-separated list of test cases to run. Available tests: %s, '
'(or \'all\' to run every test). '
'Alternative tests not included in \'all\': %s' %
(','.join(_TEST_CASES), ','.join(_ADDITIONAL_TEST_CASES)))
argp.add_argument(
'--bootstrap_file',
default='',
help='File to reference via GRPC_XDS_BOOTSTRAP. Disables built-in '
'bootstrap generation')
argp.add_argument(
'--xds_v3_support',
default=False,
action='store_true',
help='Support xDS v3 via GRPC_XDS_EXPERIMENTAL_V3_SUPPORT. '
'If a pre-created bootstrap file is provided via the --bootstrap_file '
'parameter, it should include xds_v3 in its server_features field.')
argp.add_argument(
'--client_cmd',
default=None,
help='Command to launch xDS test client. {server_uri}, {stats_port} and '
'{qps} references will be replaced using str.format(). GRPC_XDS_BOOTSTRAP '
'will be set for the command')
argp.add_argument(
'--client_hosts',
default=None,
help='Comma-separated list of hosts running client processes. If set, '
'--client_cmd is ignored and client processes are assumed to be running on '
'the specified hosts.')
argp.add_argument('--zone', default='us-central1-a')
argp.add_argument('--secondary_zone',
default='us-west1-b',
help='Zone to use for secondary TD locality tests')
argp.add_argument('--qps', default=100, type=int, help='Client QPS')
argp.add_argument(
'--wait_for_backend_sec',
default=1200,
type=int,
help='Time limit for waiting for created backend services to report '
'healthy when launching or updated GCP resources')
argp.add_argument(
'--use_existing_gcp_resources',
default=False,
action='store_true',
help=
'If set, find and use already created GCP resources instead of creating new'
' ones.')
argp.add_argument(
'--keep_gcp_resources',
default=False,
action='store_true',
help=
'Leave GCP VMs and configuration running after test. Default behavior is '
'to delete when tests complete.')
argp.add_argument('--halt_after_fail',
action='store_true',
help='Halt and save the resources when test failed.')
argp.add_argument(
'--compute_discovery_document',
default=None,
type=str,
help=
'If provided, uses this file instead of retrieving via the GCP discovery '
'API')
argp.add_argument(
'--alpha_compute_discovery_document',
default=None,
type=str,
help='If provided, uses this file instead of retrieving via the alpha GCP '
'discovery API')
argp.add_argument('--network',
default='global/networks/default',
help='GCP network to use')
_DEFAULT_PORT_RANGE = '8080:8280'
argp.add_argument('--service_port_range',
default=_DEFAULT_PORT_RANGE,
type=parse_port_range,
help='Listening port for created gRPC backends. Specified as '
'either a single int or as a range in the format min:max, in '
'which case an available port p will be chosen s.t. min <= p '
'<= max')
argp.add_argument(
'--stats_port',
default=8079,
type=int,
help='Local port for the client process to expose the LB stats service')
argp.add_argument('--xds_server',
default='trafficdirector.googleapis.com:443',
help='xDS server')
argp.add_argument('--source_image',
default='projects/debian-cloud/global/images/family/debian-9',
help='Source image for VMs created during the test')
argp.add_argument('--path_to_server_binary',
default=None,
type=str,
help='If set, the server binary must already be pre-built on '
'the specified source image')
argp.add_argument('--machine_type',
default='e2-standard-2',
help='Machine type for VMs created during the test')
argp.add_argument(
'--instance_group_size',
default=2,
type=int,
help='Number of VMs to create per instance group. Certain test cases (e.g., '
'round_robin) may not give meaningful results if this is set to a value '
'less than 2.')
argp.add_argument('--verbose',
help='verbose log output',
default=False,
action='store_true')
# TODO(ericgribkoff) Remove this param once the sponge-formatted log files are
# visible in all test environments.
argp.add_argument('--log_client_output',
help='Log captured client output',
default=False,
action='store_true')
# TODO(ericgribkoff) Remove this flag once all test environments are verified to
# have access to the alpha compute APIs.
argp.add_argument('--only_stable_gcp_apis',
help='Do not use alpha compute APIs. Some tests may be '
'incompatible with this option (gRPC health checks are '
'currently alpha and required for simulating server failure',
default=False,
action='store_true')
args = argp.parse_args()
if args.verbose:
logger.setLevel(logging.DEBUG)
CLIENT_HOSTS = []
if args.client_hosts:
CLIENT_HOSTS = args.client_hosts.split(',')
# Each of the config propagation in the control plane should finish within 600s.
# Otherwise, it indicates a bug in the control plane. The config propagation
# includes all kinds of traffic config update, like updating urlMap, creating
# the resources for the first time, updating BackendService, and changing the
# status of endpoints in BackendService.
_WAIT_FOR_URL_MAP_PATCH_SEC = 600
# In general, fetching load balancing stats only takes ~10s. However, slow
# config update could lead to empty EDS or similar symptoms causing the
# connection to hang for a long period of time. So, we want to extend the stats
# wait time to be the same as urlMap patch time.
_WAIT_FOR_STATS_SEC = _WAIT_FOR_URL_MAP_PATCH_SEC
_DEFAULT_SERVICE_PORT = 80
_WAIT_FOR_BACKEND_SEC = args.wait_for_backend_sec
_WAIT_FOR_OPERATION_SEC = 1200
_INSTANCE_GROUP_SIZE = args.instance_group_size
_NUM_TEST_RPCS = 10 * args.qps
_CONNECTION_TIMEOUT_SEC = 60
_GCP_API_RETRIES = 5
_BOOTSTRAP_TEMPLATE = """
{{
"node": {{
"id": "{node_id}",
"metadata": {{
"TRAFFICDIRECTOR_NETWORK_NAME": "%s",
"com.googleapis.trafficdirector.config_time_trace": "TRUE"
}},
"locality": {{
"zone": "%s"
}}
}},
"xds_servers": [{{
"server_uri": "%s",
"channel_creds": [
{{
"type": "google_default",
"config": {{}}
}}
],
"server_features": {server_features}
}}]
}}""" % (args.network.split('/')[-1], args.zone, args.xds_server)
# TODO(ericgribkoff) Add change_backend_service to this list once TD no longer
# sends an update with no localities when adding the MIG to the backend service
# can race with the URL map patch.
_TESTS_TO_FAIL_ON_RPC_FAILURE = ['ping_pong', 'round_robin']
# Tests that run UnaryCall and EmptyCall.
_TESTS_TO_RUN_MULTIPLE_RPCS = ['path_matching', 'header_matching']
# Tests that make UnaryCall with test metadata.
_TESTS_TO_SEND_METADATA = ['header_matching']
_TEST_METADATA_KEY = 'xds_md'
_TEST_METADATA_VALUE_UNARY = 'unary_yranu'
_TEST_METADATA_VALUE_EMPTY = 'empty_ytpme'
# Extra RPC metadata whose value is a number, sent with UnaryCall only.
_TEST_METADATA_NUMERIC_KEY = 'xds_md_numeric'
_TEST_METADATA_NUMERIC_VALUE = '159'
_PATH_MATCHER_NAME = 'path-matcher'
_BASE_TEMPLATE_NAME = 'test-template'
_BASE_INSTANCE_GROUP_NAME = 'test-ig'
_BASE_HEALTH_CHECK_NAME = 'test-hc'
_BASE_FIREWALL_RULE_NAME = 'test-fw-rule'
_BASE_BACKEND_SERVICE_NAME = 'test-backend-service'
_BASE_URL_MAP_NAME = 'test-map'
_BASE_SERVICE_HOST = 'grpc-test'
_BASE_TARGET_PROXY_NAME = 'test-target-proxy'
_BASE_FORWARDING_RULE_NAME = 'test-forwarding-rule'
_TEST_LOG_BASE_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)),
'../../reports')
_SPONGE_LOG_NAME = 'sponge_log.log'
_SPONGE_XML_NAME = 'sponge_log.xml'
def get_client_stats(num_rpcs, timeout_sec):
if CLIENT_HOSTS:
hosts = CLIENT_HOSTS
else:
hosts = ['localhost']
for host in hosts:
with grpc.insecure_channel('%s:%d' %
(host, args.stats_port)) as channel:
stub = test_pb2_grpc.LoadBalancerStatsServiceStub(channel)
request = messages_pb2.LoadBalancerStatsRequest()
request.num_rpcs = num_rpcs
request.timeout_sec = timeout_sec
rpc_timeout = timeout_sec + _CONNECTION_TIMEOUT_SEC
logger.debug('Invoking GetClientStats RPC to %s:%d:', host,
args.stats_port)
response = stub.GetClientStats(request,
wait_for_ready=True,
timeout=rpc_timeout)
logger.debug('Invoked GetClientStats RPC to %s: %s', host,
json_format.MessageToJson(response))
return response
def get_client_accumulated_stats():
if CLIENT_HOSTS:
hosts = CLIENT_HOSTS
else:
hosts = ['localhost']
for host in hosts:
with grpc.insecure_channel('%s:%d' %
(host, args.stats_port)) as channel:
stub = test_pb2_grpc.LoadBalancerStatsServiceStub(channel)
request = messages_pb2.LoadBalancerAccumulatedStatsRequest()
logger.debug('Invoking GetClientAccumulatedStats RPC to %s:%d:',
host, args.stats_port)
response = stub.GetClientAccumulatedStats(
request, wait_for_ready=True, timeout=_CONNECTION_TIMEOUT_SEC)
logger.debug('Invoked GetClientAccumulatedStats RPC to %s: %s',
host, response)
return response
def get_client_xds_config_dump():
if CLIENT_HOSTS:
hosts = CLIENT_HOSTS
else:
hosts = ['localhost']
for host in hosts:
server_address = '%s:%d' % (host, args.stats_port)
with grpc.insecure_channel(server_address) as channel:
stub = csds_pb2_grpc.ClientStatusDiscoveryServiceStub(channel)
logger.debug('Fetching xDS config dump from %s', server_address)
response = stub.FetchClientStatus(csds_pb2.ClientStatusRequest(),
wait_for_ready=True,
timeout=_CONNECTION_TIMEOUT_SEC)
logger.debug('Fetched xDS config dump from %s', server_address)
if len(response.config) != 1:
logger.error('Unexpected number of ClientConfigs %d: %s',
len(response.config), response)
return None
else:
# Converting the ClientStatusResponse into JSON, because many
# fields are packed in google.protobuf.Any. It will require many
# duplicated code to unpack proto message and inspect values.
return json_format.MessageToDict(
response.config[0], preserving_proto_field_name=True)
def configure_client(rpc_types, metadata=[], timeout_sec=None):
if CLIENT_HOSTS:
hosts = CLIENT_HOSTS
else:
hosts = ['localhost']
for host in hosts:
with grpc.insecure_channel('%s:%d' %
(host, args.stats_port)) as channel:
stub = test_pb2_grpc.XdsUpdateClientConfigureServiceStub(channel)
request = messages_pb2.ClientConfigureRequest()
request.types.extend(rpc_types)
for rpc_type, md_key, md_value in metadata:
md = request.metadata.add()
md.type = rpc_type
md.key = md_key
md.value = md_value
if timeout_sec:
request.timeout_sec = timeout_sec
logger.debug(
'Invoking XdsUpdateClientConfigureService RPC to %s:%d: %s',
host, args.stats_port, request)
stub.Configure(request,
wait_for_ready=True,
timeout=_CONNECTION_TIMEOUT_SEC)
logger.debug('Invoked XdsUpdateClientConfigureService RPC to %s',
host)
class RpcDistributionError(Exception):
pass
def _verify_rpcs_to_given_backends(backends, timeout_sec, num_rpcs,
allow_failures):
start_time = time.time()
error_msg = None
logger.debug('Waiting for %d sec until backends %s receive load' %
(timeout_sec, backends))
while time.time() - start_time <= timeout_sec:
error_msg = None
stats = get_client_stats(num_rpcs, timeout_sec)
rpcs_by_peer = stats.rpcs_by_peer
for backend in backends:
if backend not in rpcs_by_peer:
error_msg = 'Backend %s did not receive load' % backend
break
if not error_msg and len(rpcs_by_peer) > len(backends):
error_msg = 'Unexpected backend received load: %s' % rpcs_by_peer
if not allow_failures and stats.num_failures > 0:
error_msg = '%d RPCs failed' % stats.num_failures
if not error_msg:
return
raise RpcDistributionError(error_msg)
def wait_until_all_rpcs_go_to_given_backends_or_fail(backends,
timeout_sec,
num_rpcs=_NUM_TEST_RPCS):
_verify_rpcs_to_given_backends(backends,
timeout_sec,
num_rpcs,
allow_failures=True)
def wait_until_all_rpcs_go_to_given_backends(backends,
timeout_sec,
num_rpcs=_NUM_TEST_RPCS):
_verify_rpcs_to_given_backends(backends,
timeout_sec,
num_rpcs,
allow_failures=False)
def wait_until_no_rpcs_go_to_given_backends(backends, timeout_sec):
start_time = time.time()
while time.time() - start_time <= timeout_sec:
stats = get_client_stats(_NUM_TEST_RPCS, timeout_sec)
error_msg = None
rpcs_by_peer = stats.rpcs_by_peer
for backend in backends:
if backend in rpcs_by_peer:
error_msg = 'Unexpected backend %s receives load' % backend
break
if not error_msg:
return
raise Exception('Unexpected RPCs going to given backends')
def wait_until_rpcs_in_flight(rpc_type, timeout_sec, num_rpcs, threshold):
'''Block until the test client reaches the state with the given number
of RPCs being outstanding stably.
Args:
rpc_type: A string indicating the RPC method to check for. Either
'UnaryCall' or 'EmptyCall'.
timeout_sec: Maximum number of seconds to wait until the desired state
is reached.
num_rpcs: Expected number of RPCs to be in-flight.
threshold: Number within [0,100], the tolerable percentage by which
the actual number of RPCs in-flight can differ from the expected number.
'''
if threshold < 0 or threshold > 100:
raise ValueError('Value error: Threshold should be between 0 to 100')
threshold_fraction = threshold / 100.0
start_time = time.time()
error_msg = None
logger.debug(
'Waiting for %d sec until %d %s RPCs (with %d%% tolerance) in-flight' %
(timeout_sec, num_rpcs, rpc_type, threshold))
while time.time() - start_time <= timeout_sec:
error_msg = _check_rpcs_in_flight(rpc_type, num_rpcs, threshold,
threshold_fraction)
if error_msg:
logger.debug('Progress: %s', error_msg)
time.sleep(2)
else:
break
# Ensure the number of outstanding RPCs is stable.
if not error_msg:
time.sleep(5)
error_msg = _check_rpcs_in_flight(rpc_type, num_rpcs, threshold,
threshold_fraction)
if error_msg:
raise Exception("Wrong number of %s RPCs in-flight: %s" %
(rpc_type, error_msg))
def _check_rpcs_in_flight(rpc_type, num_rpcs, threshold, threshold_fraction):
error_msg = None
stats = get_client_accumulated_stats()
rpcs_started = stats.num_rpcs_started_by_method[rpc_type]
rpcs_succeeded = stats.num_rpcs_succeeded_by_method[rpc_type]
rpcs_failed = stats.num_rpcs_failed_by_method[rpc_type]
rpcs_in_flight = rpcs_started - rpcs_succeeded - rpcs_failed
if rpcs_in_flight < (num_rpcs * (1 - threshold_fraction)):
error_msg = ('actual(%d) < expected(%d - %d%%)' %
(rpcs_in_flight, num_rpcs, threshold))
elif rpcs_in_flight > (num_rpcs * (1 + threshold_fraction)):
error_msg = ('actual(%d) > expected(%d + %d%%)' %
(rpcs_in_flight, num_rpcs, threshold))
return error_msg
def compare_distributions(actual_distribution, expected_distribution,
threshold):
"""Compare if two distributions are similar.
Args:
actual_distribution: A list of floats, contains the actual distribution.
expected_distribution: A list of floats, contains the expected distribution.
threshold: Number within [0,100], the threshold percentage by which the
actual distribution can differ from the expected distribution.
Returns:
The similarity between the distributions as a boolean. Returns true if the
actual distribution lies within the threshold of the expected
distribution, false otherwise.
Raises:
ValueError: if threshold is not with in [0,100].
Exception: containing detailed error messages.
"""
if len(expected_distribution) != len(actual_distribution):
raise Exception(
'Error: expected and actual distributions have different size (%d vs %d)'
% (len(expected_distribution), len(actual_distribution)))
if threshold < 0 or threshold > 100:
raise ValueError('Value error: Threshold should be between 0 to 100')
threshold_fraction = threshold / 100.0
for expected, actual in zip(expected_distribution, actual_distribution):
if actual < (expected * (1 - threshold_fraction)):
raise Exception("actual(%f) < expected(%f-%d%%)" %
(actual, expected, threshold))
if actual > (expected * (1 + threshold_fraction)):
raise Exception("actual(%f) > expected(%f+%d%%)" %
(actual, expected, threshold))
return True
def compare_expected_instances(stats, expected_instances):
"""Compare if stats have expected instances for each type of RPC.
Args:
stats: LoadBalancerStatsResponse reported by interop client.
expected_instances: a dict with key as the RPC type (string), value as
the expected backend instances (list of strings).
Returns:
Returns true if the instances are expected. False if not.
"""
for rpc_type, expected_peers in list(expected_instances.items()):
rpcs_by_peer_for_type = stats.rpcs_by_method[rpc_type]
rpcs_by_peer = rpcs_by_peer_for_type.rpcs_by_peer if rpcs_by_peer_for_type else None
logger.debug('rpc: %s, by_peer: %s', rpc_type, rpcs_by_peer)
peers = list(rpcs_by_peer.keys())
if set(peers) != set(expected_peers):
logger.info('unexpected peers for %s, got %s, want %s', rpc_type,
peers, expected_peers)
return False
return True
def test_backends_restart(gcp, backend_service, instance_group):
logger.info('Running test_backends_restart')
instance_names = get_instance_names(gcp, instance_group)
num_instances = len(instance_names)
start_time = time.time()
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_STATS_SEC)
try:
resize_instance_group(gcp, instance_group, 0)
wait_until_all_rpcs_go_to_given_backends_or_fail([],
_WAIT_FOR_BACKEND_SEC)
finally:
resize_instance_group(gcp, instance_group, num_instances)
wait_for_healthy_backends(gcp, backend_service, instance_group)
new_instance_names = get_instance_names(gcp, instance_group)
wait_until_all_rpcs_go_to_given_backends(new_instance_names,
_WAIT_FOR_BACKEND_SEC)
def test_change_backend_service(gcp, original_backend_service, instance_group,
alternate_backend_service,
same_zone_instance_group):
logger.info('Running test_change_backend_service')
original_backend_instances = get_instance_names(gcp, instance_group)
alternate_backend_instances = get_instance_names(gcp,
same_zone_instance_group)
patch_backend_service(gcp, alternate_backend_service,
[same_zone_instance_group])
wait_for_healthy_backends(gcp, original_backend_service, instance_group)
wait_for_healthy_backends(gcp, alternate_backend_service,
same_zone_instance_group)
wait_until_all_rpcs_go_to_given_backends(original_backend_instances,
_WAIT_FOR_STATS_SEC)
passed = True
try:
patch_url_map_backend_service(gcp, alternate_backend_service)
wait_until_all_rpcs_go_to_given_backends(alternate_backend_instances,
_WAIT_FOR_URL_MAP_PATCH_SEC)
except Exception:
passed = False
raise
finally:
if passed or not args.halt_after_fail:
patch_url_map_backend_service(gcp, original_backend_service)
patch_backend_service(gcp, alternate_backend_service, [])
def test_gentle_failover(gcp,
backend_service,
primary_instance_group,
secondary_instance_group,
swapped_primary_and_secondary=False):
logger.info('Running test_gentle_failover')
num_primary_instances = len(get_instance_names(gcp, primary_instance_group))
min_instances_for_gentle_failover = 3 # Need >50% failure to start failover
passed = True
try:
if num_primary_instances < min_instances_for_gentle_failover:
resize_instance_group(gcp, primary_instance_group,
min_instances_for_gentle_failover)
patch_backend_service(
gcp, backend_service,
[primary_instance_group, secondary_instance_group])
primary_instance_names = get_instance_names(gcp, primary_instance_group)
secondary_instance_names = get_instance_names(gcp,
secondary_instance_group)
wait_for_healthy_backends(gcp, backend_service, primary_instance_group)
wait_for_healthy_backends(gcp, backend_service,
secondary_instance_group)
wait_until_all_rpcs_go_to_given_backends(primary_instance_names,
_WAIT_FOR_STATS_SEC)
instances_to_stop = primary_instance_names[:-1]
remaining_instances = primary_instance_names[-1:]
try:
set_serving_status(instances_to_stop,
gcp.service_port,
serving=False)
wait_until_all_rpcs_go_to_given_backends(
remaining_instances + secondary_instance_names,
_WAIT_FOR_BACKEND_SEC)
finally:
set_serving_status(primary_instance_names,
gcp.service_port,
serving=True)
except RpcDistributionError as e:
if not swapped_primary_and_secondary and is_primary_instance_group(
gcp, secondary_instance_group):
# Swap expectation of primary and secondary instance groups.
test_gentle_failover(gcp,
backend_service,
secondary_instance_group,
primary_instance_group,
swapped_primary_and_secondary=True)
else:
passed = False
raise e
except Exception:
passed = False
raise
finally:
if passed or not args.halt_after_fail:
patch_backend_service(gcp, backend_service,
[primary_instance_group])
resize_instance_group(gcp, primary_instance_group,
num_primary_instances)
instance_names = get_instance_names(gcp, primary_instance_group)
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_BACKEND_SEC)
def test_load_report_based_failover(gcp, backend_service,
primary_instance_group,
secondary_instance_group):
logger.info('Running test_load_report_based_failover')
passed = True
try:
patch_backend_service(
gcp, backend_service,
[primary_instance_group, secondary_instance_group])
primary_instance_names = get_instance_names(gcp, primary_instance_group)
secondary_instance_names = get_instance_names(gcp,
secondary_instance_group)
wait_for_healthy_backends(gcp, backend_service, primary_instance_group)
wait_for_healthy_backends(gcp, backend_service,
secondary_instance_group)
wait_until_all_rpcs_go_to_given_backends(primary_instance_names,
_WAIT_FOR_STATS_SEC)
# Set primary locality's balance mode to RATE, and RPS to 20% of the
# client's QPS. The secondary locality will be used.
max_rate = int(args.qps * 1 / 5)
logger.info('Patching backend service to RATE with %d max_rate',
max_rate)
patch_backend_service(
gcp,
backend_service, [primary_instance_group, secondary_instance_group],
balancing_mode='RATE',
max_rate=max_rate)
wait_until_all_rpcs_go_to_given_backends(
primary_instance_names + secondary_instance_names,
_WAIT_FOR_BACKEND_SEC)
# Set primary locality's balance mode to RATE, and RPS to 120% of the
# client's QPS. Only the primary locality will be used.
max_rate = int(args.qps * 6 / 5)
logger.info('Patching backend service to RATE with %d max_rate',
max_rate)
patch_backend_service(
gcp,
backend_service, [primary_instance_group, secondary_instance_group],
balancing_mode='RATE',
max_rate=max_rate)
wait_until_all_rpcs_go_to_given_backends(primary_instance_names,
_WAIT_FOR_BACKEND_SEC)
logger.info("success")
except Exception:
passed = False
raise
finally:
if passed or not args.halt_after_fail:
patch_backend_service(gcp, backend_service,
[primary_instance_group])
instance_names = get_instance_names(gcp, primary_instance_group)
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_BACKEND_SEC)
def test_ping_pong(gcp, backend_service, instance_group):
logger.info('Running test_ping_pong')
wait_for_healthy_backends(gcp, backend_service, instance_group)
instance_names = get_instance_names(gcp, instance_group)
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_STATS_SEC)
def test_remove_instance_group(gcp, backend_service, instance_group,
same_zone_instance_group):
logger.info('Running test_remove_instance_group')
passed = True
try:
patch_backend_service(gcp,
backend_service,
[instance_group, same_zone_instance_group],
balancing_mode='RATE')
wait_for_healthy_backends(gcp, backend_service, instance_group)
wait_for_healthy_backends(gcp, backend_service,
same_zone_instance_group)
instance_names = get_instance_names(gcp, instance_group)
same_zone_instance_names = get_instance_names(gcp,
same_zone_instance_group)
try:
wait_until_all_rpcs_go_to_given_backends(
instance_names + same_zone_instance_names,
_WAIT_FOR_OPERATION_SEC)
remaining_instance_group = same_zone_instance_group
remaining_instance_names = same_zone_instance_names
except RpcDistributionError as e:
# If connected to TD in a different zone, we may route traffic to
# only one instance group. Determine which group that is to continue
# with the remainder of the test case.
try:
wait_until_all_rpcs_go_to_given_backends(
instance_names, _WAIT_FOR_STATS_SEC)
remaining_instance_group = same_zone_instance_group
remaining_instance_names = same_zone_instance_names
except RpcDistributionError as e:
wait_until_all_rpcs_go_to_given_backends(
same_zone_instance_names, _WAIT_FOR_STATS_SEC)
remaining_instance_group = instance_group
remaining_instance_names = instance_names
patch_backend_service(gcp,
backend_service, [remaining_instance_group],
balancing_mode='RATE')
wait_until_all_rpcs_go_to_given_backends(remaining_instance_names,
_WAIT_FOR_BACKEND_SEC)
except Exception:
passed = False
raise
finally:
if passed or not args.halt_after_fail:
patch_backend_service(gcp, backend_service, [instance_group])
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_BACKEND_SEC)
def test_round_robin(gcp, backend_service, instance_group):
logger.info('Running test_round_robin')
wait_for_healthy_backends(gcp, backend_service, instance_group)
instance_names = get_instance_names(gcp, instance_group)
threshold = 1
wait_until_all_rpcs_go_to_given_backends(instance_names,
_WAIT_FOR_STATS_SEC)
# TODO(ericgribkoff) Delayed config propagation from earlier tests
# may result in briefly receiving an empty EDS update, resulting in failed
# RPCs. Retry distribution validation if this occurs; long-term fix is
# creating new backend resources for each individual test case.
# Each attempt takes 10 seconds. Config propagation can take several
# minutes.
max_attempts = 40
for i in range(max_attempts):
stats = get_client_stats(_NUM_TEST_RPCS, _WAIT_FOR_STATS_SEC)
requests_received = [stats.rpcs_by_peer[x] for x in stats.rpcs_by_peer]
total_requests_received = sum(requests_received)
if total_requests_received != _NUM_TEST_RPCS:
logger.info('Unexpected RPC failures, retrying: %s', stats)
continue
expected_requests = total_requests_received / len(instance_names)
for instance in instance_names:
if abs(stats.rpcs_by_peer[instance] -
expected_requests) > threshold:
raise Exception(
'RPC peer distribution differs from expected by more than %d '
'for instance %s (%s)' % (threshold, instance, stats))
return
raise Exception('RPC failures persisted through %d retries' % max_attempts)
def test_secondary_locality_gets_no_requests_on_partial_primary_failure(
gcp,
backend_service,
primary_instance_group,
secondary_instance_group,
swapped_primary_and_secondary=False):
logger.info(
'Running secondary_locality_gets_no_requests_on_partial_primary_failure'
)
passed = True
try:
patch_backend_service(
gcp, backend_service,
[primary_instance_group, secondary_instance_group])
wait_for_healthy_backends(gcp, backend_service, primary_instance_group)
wait_for_healthy_backends(gcp, backend_service,
secondary_instance_group)
primary_instance_names = get_instance_names(gcp, primary_instance_group)
wait_until_all_rpcs_go_to_given_backends(primary_instance_names,
_WAIT_FOR_STATS_SEC)
instances_to_stop = primary_instance_names[:1]
remaining_instances = primary_instance_names[1:]
try:
set_serving_status(instances_to_stop,
gcp.service_port,
serving=False)
wait_until_all_rpcs_go_to_given_backends(remaining_instances,
_WAIT_FOR_BACKEND_SEC)
finally:
set_serving_status(primary_instance_names,
gcp.service_port,
serving=True)
except RpcDistributionError as e:
if not swapped_primary_and_secondary and is_primary_instance_group(
gcp, secondary_instance_group):
# Swap expectation of primary and secondary instance groups.
test_secondary_locality_gets_no_requests_on_partial_primary_failure(
gcp,
backend_service,
secondary_instance_group,
primary_instance_group,
swapped_primary_and_secondary=True)
else:
passed = False
raise e
finally:
if passed or not args.halt_after_fail:
patch_backend_service(gcp, backend_service,
[primary_instance_group])
def test_secondary_locality_gets_requests_on_primary_failure(
gcp,
backend_service,
primary_instance_group,
secondary_instance_group,
swapped_primary_and_secondary=False):
logger.info('Running secondary_locality_gets_requests_on_primary_failure')
passed = True
try:
patch_backend_service(
gcp, backend_service,
[primary_instance_group, secondary_instance_group])
wait_for_healthy_backends(gcp, backend_service, primary_instance_group)
wait_for_healthy_backends(gcp, backend_service,
secondary_instance_group)
primary_instance_names = get_instance_names(gcp, primary_instance_group)
secondary_instance_names = get_instance_names(gcp,
secondary_instance_group)
wait_until_all_rpcs_go_to_given_backends(primary_instance_names,
_WAIT_FOR_STATS_SEC)
try:
set_serving_status(primary_instance_names,
gcp.service_port,
serving=False)
wait_until_all_rpcs_go_to_given_backends(secondary_instance_names,
_WAIT_FOR_BACKEND_SEC)
finally:
set_serving_status(primary_instance_names,
gcp.service_port,
serving=True)
except RpcDistributionError as e:
if not swapped_primary_and_secondary and is_primary_instance_group(
gcp, secondary_instance_group):
# Swap expectation of primary and secondary instance groups.
test_secondary_locality_gets_requests_on_primary_failure(
gcp,
backend_service,
secondary_instance_group,
primary_instance_group,
swapped_primary_and_secondary=True)
else:
passed = False
raise e
finally:
if passed or not args.halt_after_fail:
patch_backend_service(gcp, backend_service,
[primary_instance_group])
def prepare_services_for_urlmap_tests(gcp, original_backend_service,
instance_group, alternate_backend_service,
same_zone_instance_group):
'''
This function prepares the services to be ready for tests that modifies
urlmaps.
Returns:
Returns original and alternate backend names as lists of strings.
'''
logger.info('waiting for original backends to become healthy')
wait_for_healthy_backends(gcp, original_backend_service, instance_group)
patch_backend_service(gcp, alternate_backend_service,
[same_zone_instance_group])
logger.info('waiting for alternate to become healthy')