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upstream_impl_test.cc
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#include <chrono>
#include <cstdint>
#include <list>
#include <string>
#include <tuple>
#include <vector>
#include "envoy/api/api.h"
#include "envoy/config/cluster/v3/cluster.pb.h"
#include "envoy/config/core/v3/base.pb.h"
#include "envoy/config/core/v3/health_check.pb.h"
#include "envoy/config/endpoint/v3/endpoint_components.pb.h"
#include "envoy/http/codec.h"
#include "envoy/stats/scope.h"
#include "envoy/upstream/cluster_manager.h"
#include "envoy/upstream/upstream.h"
#include "common/config/metadata.h"
#include "common/network/utility.h"
#include "common/singleton/manager_impl.h"
#include "common/upstream/static_cluster.h"
#include "common/upstream/strict_dns_cluster.h"
#include "server/transport_socket_config_impl.h"
#include "test/common/stats/stat_test_utility.h"
#include "test/common/upstream/utility.h"
#include "test/mocks/common.h"
#include "test/mocks/local_info/mocks.h"
#include "test/mocks/network/mocks.h"
#include "test/mocks/protobuf/mocks.h"
#include "test/mocks/runtime/mocks.h"
#include "test/mocks/server/admin.h"
#include "test/mocks/server/instance.h"
#include "test/mocks/ssl/mocks.h"
#include "test/mocks/upstream/cluster_info.h"
#include "test/mocks/upstream/cluster_manager.h"
#include "test/mocks/upstream/health_checker.h"
#include "test/mocks/upstream/priority_set.h"
#include "test/test_common/registry.h"
#include "test/test_common/test_runtime.h"
#include "test/test_common/utility.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using testing::_;
using testing::ContainerEq;
using testing::Invoke;
using testing::NiceMock;
using testing::Return;
namespace Envoy {
namespace Upstream {
namespace {
class UpstreamImplTestBase {
protected:
UpstreamImplTestBase() : api_(Api::createApiForTest(stats_, random_)) {}
NiceMock<Server::MockAdmin> admin_;
Ssl::MockContextManager ssl_context_manager_;
NiceMock<MockClusterManager> cm_;
NiceMock<LocalInfo::MockLocalInfo> local_info_;
NiceMock<Event::MockDispatcher> dispatcher_;
NiceMock<Runtime::MockLoader> runtime_;
NiceMock<Random::MockRandomGenerator> random_;
Stats::TestUtil::TestStore stats_;
Singleton::ManagerImpl singleton_manager_{Thread::threadFactoryForTest()};
NiceMock<ThreadLocal::MockInstance> tls_;
NiceMock<ProtobufMessage::MockValidationVisitor> validation_visitor_;
Api::ApiPtr api_;
};
std::list<std::string> hostListToAddresses(const HostVector& hosts) {
std::list<std::string> addresses;
for (const HostSharedPtr& host : hosts) {
addresses.push_back(host->address()->asString());
}
return addresses;
}
template <class HostsT = HostVector>
std::shared_ptr<const HostsT>
makeHostsFromHostsPerLocality(HostsPerLocalityConstSharedPtr hosts_per_locality) {
HostVector hosts;
for (const auto& locality_hosts : hosts_per_locality->get()) {
for (const auto& host : locality_hosts) {
hosts.emplace_back(host);
}
}
return std::make_shared<const HostsT>(hosts);
}
struct ResolverData {
ResolverData(Network::MockDnsResolver& dns_resolver, Event::MockDispatcher& dispatcher) {
timer_ = new Event::MockTimer(&dispatcher);
expectResolve(dns_resolver);
}
void expectResolve(Network::MockDnsResolver& dns_resolver) {
EXPECT_CALL(dns_resolver, resolve(_, _, _))
.WillOnce(Invoke([&](const std::string&, Network::DnsLookupFamily,
Network::DnsResolver::ResolveCb cb) -> Network::ActiveDnsQuery* {
dns_callback_ = cb;
return &active_dns_query_;
}))
.RetiresOnSaturation();
}
Event::MockTimer* timer_;
Network::DnsResolver::ResolveCb dns_callback_;
Network::MockActiveDnsQuery active_dns_query_;
};
using StrictDnsConfigTuple =
std::tuple<std::string, Network::DnsLookupFamily, std::list<std::string>>;
std::vector<StrictDnsConfigTuple> generateStrictDnsParams() {
std::vector<StrictDnsConfigTuple> dns_config;
{
std::string family_yaml("");
Network::DnsLookupFamily family(Network::DnsLookupFamily::Auto);
std::list<std::string> dns_response{"127.0.0.1", "127.0.0.2"};
dns_config.push_back(std::make_tuple(family_yaml, family, dns_response));
}
{
std::string family_yaml(R"EOF(dns_lookup_family: v4_only
)EOF");
Network::DnsLookupFamily family(Network::DnsLookupFamily::V4Only);
std::list<std::string> dns_response{"127.0.0.1", "127.0.0.2"};
dns_config.push_back(std::make_tuple(family_yaml, family, dns_response));
}
{
std::string family_yaml(R"EOF(dns_lookup_family: v6_only
)EOF");
Network::DnsLookupFamily family(Network::DnsLookupFamily::V6Only);
std::list<std::string> dns_response{"::1", "::2"};
dns_config.push_back(std::make_tuple(family_yaml, family, dns_response));
}
{
std::string family_yaml(R"EOF(dns_lookup_family: auto
)EOF");
Network::DnsLookupFamily family(Network::DnsLookupFamily::Auto);
std::list<std::string> dns_response{"127.0.0.1", "127.0.0.2"};
dns_config.push_back(std::make_tuple(family_yaml, family, dns_response));
}
return dns_config;
}
class StrictDnsParamTest : public testing::TestWithParam<StrictDnsConfigTuple>,
public UpstreamImplTestBase {};
INSTANTIATE_TEST_SUITE_P(DnsParam, StrictDnsParamTest,
testing::ValuesIn(generateStrictDnsParams()));
TEST_P(StrictDnsParamTest, ImmediateResolve) {
auto dns_resolver = std::make_shared<NiceMock<Network::MockDnsResolver>>();
ReadyWatcher initialized;
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: strict_dns
)EOF" + std::get<0>(GetParam()) +
R"EOF(
lb_policy: round_robin
load_assignment:
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: foo.bar.com
port_value: 443
)EOF";
EXPECT_CALL(initialized, ready());
EXPECT_CALL(*dns_resolver, resolve("foo.bar.com", std::get<1>(GetParam()), _))
.WillOnce(Invoke([&](const std::string&, Network::DnsLookupFamily,
Network::DnsResolver::ResolveCb cb) -> Network::ActiveDnsQuery* {
cb(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse(std::get<2>(GetParam())));
return nullptr;
}));
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver, factory_context,
std::move(scope), false);
cluster.initialize([&]() -> void { initialized.ready(); });
EXPECT_EQ(2UL, cluster.prioritySet().hostSetsPerPriority()[0]->hosts().size());
EXPECT_EQ(2UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
}
class StrictDnsClusterImplTest : public testing::Test, public UpstreamImplTestBase {
protected:
std::shared_ptr<Network::MockDnsResolver> dns_resolver_ =
std::make_shared<Network::MockDnsResolver>();
};
TEST_F(StrictDnsClusterImplTest, ZeroHostsIsInializedImmediately) {
ReadyWatcher initialized;
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
load_assignment:
endpoints:
- lb_endpoints:
)EOF";
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
EXPECT_CALL(initialized, ready());
cluster.initialize([&]() -> void { initialized.ready(); });
EXPECT_EQ(0UL, cluster.prioritySet().hostSetsPerPriority()[0]->hosts().size());
EXPECT_EQ(0UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
}
// Resolve zero hosts, while using health checking.
TEST_F(StrictDnsClusterImplTest, ZeroHostsHealthChecker) {
ReadyWatcher initialized;
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
load_assignment:
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: foo.bar.com
port_value: 443
)EOF";
ResolverData resolver(*dns_resolver_, dispatcher_);
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
std::shared_ptr<MockHealthChecker> health_checker(new MockHealthChecker());
EXPECT_CALL(*health_checker, start());
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
cluster.setHealthChecker(health_checker);
cluster.initialize([&]() -> void { initialized.ready(); });
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
EXPECT_CALL(initialized, ready());
EXPECT_CALL(*resolver.timer_, enableTimer(_, _));
resolver.dns_callback_(Network::DnsResolver::ResolutionStatus::Success, {});
EXPECT_EQ(0UL, cluster.prioritySet().hostSetsPerPriority()[0]->hosts().size());
EXPECT_EQ(0UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
}
TEST_F(StrictDnsClusterImplTest, Basic) {
// gmock matches in LIFO order which is why these are swapped.
ResolverData resolver2(*dns_resolver_, dispatcher_);
ResolverData resolver1(*dns_resolver_, dispatcher_);
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: strict_dns
dns_refresh_rate: 4s
dns_failure_refresh_rate:
base_interval: 7s
max_interval: 10s
lb_policy: round_robin
circuit_breakers:
thresholds:
- priority: DEFAULT
max_connections: 43
max_pending_requests: 57
max_requests: 50
max_retries: 10
- priority: HIGH
max_connections: 1
max_pending_requests: 2
max_requests: 3
max_retries: 4
max_requests_per_connection: 3
protocol_selection: USE_DOWNSTREAM_PROTOCOL
http2_protocol_options:
hpack_table_size: 0
http_protocol_options:
header_key_format:
proper_case_words: {}
load_assignment:
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: localhost1
port_value: 11001
- endpoint:
address:
socket_address:
address: localhost2
port_value: 11002
)EOF";
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_connections", 43));
EXPECT_EQ(43U, cluster.info()->resourceManager(ResourcePriority::Default).connections().max());
EXPECT_CALL(runtime_.snapshot_,
getInteger("circuit_breakers.name.default.max_pending_requests", 57));
EXPECT_EQ(57U,
cluster.info()->resourceManager(ResourcePriority::Default).pendingRequests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_requests", 50));
EXPECT_EQ(50U, cluster.info()->resourceManager(ResourcePriority::Default).requests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_retries", 10));
EXPECT_EQ(10U, cluster.info()->resourceManager(ResourcePriority::Default).retries().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_connections", 1));
EXPECT_EQ(1U, cluster.info()->resourceManager(ResourcePriority::High).connections().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_pending_requests", 2));
EXPECT_EQ(2U, cluster.info()->resourceManager(ResourcePriority::High).pendingRequests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_requests", 3));
EXPECT_EQ(3U, cluster.info()->resourceManager(ResourcePriority::High).requests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_retries", 4));
EXPECT_EQ(4U, cluster.info()->resourceManager(ResourcePriority::High).retries().max());
EXPECT_EQ(3U, cluster.info()->maxRequestsPerConnection());
EXPECT_EQ(0U, cluster.info()->http2Options().hpack_table_size().value());
EXPECT_EQ(Http::Http1Settings::HeaderKeyFormat::ProperCase,
cluster.info()->http1Settings().header_key_format_);
cluster.info()->stats().upstream_rq_total_.inc();
EXPECT_EQ(1UL, stats_.counter("cluster.name.upstream_rq_total").value());
EXPECT_CALL(runtime_.snapshot_, featureEnabled("upstream.maintenance_mode.name", 0));
EXPECT_FALSE(cluster.info()->maintenanceMode());
ReadyWatcher membership_updated;
cluster.prioritySet().addPriorityUpdateCb(
[&](uint32_t, const HostVector&, const HostVector&) -> void { membership_updated.ready(); });
cluster.initialize([] {});
resolver1.expectResolve(*dns_resolver_);
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1", "127.0.0.2"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[0]->hostname());
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[1]->hostname());
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.3"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
// Make sure we de-dup the same address.
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"10.0.0.1", "10.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001", "10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ(2UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->hostsPerLocality().get().size());
EXPECT_EQ(1UL,
cluster.prioritySet().hostSetsPerPriority()[0]->healthyHostsPerLocality().get().size());
for (const HostSharedPtr& host : cluster.prioritySet().hostSetsPerPriority()[0]->hosts()) {
EXPECT_EQ(cluster.info().get(), &host->cluster());
}
// Empty response. With successful but empty response the host list deletes the address.
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({}));
EXPECT_THAT(
std::list<std::string>({"10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
// Empty response. With failing but empty response the host list does not delete the address.
ON_CALL(random_, random()).WillByDefault(Return(8000));
resolver2.expectResolve(*dns_resolver_);
resolver2.timer_->invokeCallback();
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(1000), _));
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Failure,
TestUtility::makeDnsResponse({}));
EXPECT_THAT(
std::list<std::string>({"10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
// Make sure we cancel.
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
resolver2.expectResolve(*dns_resolver_);
resolver2.timer_->invokeCallback();
EXPECT_CALL(resolver1.active_dns_query_, cancel());
EXPECT_CALL(resolver2.active_dns_query_, cancel());
}
// Verifies that host removal works correctly when hosts are being health checked
// but the cluster is configured to always remove hosts
TEST_F(StrictDnsClusterImplTest, HostRemovalActiveHealthSkipped) {
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
ignore_health_on_host_removal: true
load_assignment:
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: foo.bar.com
port_value: 443
)EOF";
ResolverData resolver(*dns_resolver_, dispatcher_);
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
std::shared_ptr<MockHealthChecker> health_checker(new MockHealthChecker());
EXPECT_CALL(*health_checker, start());
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
cluster.setHealthChecker(health_checker);
cluster.initialize([&]() -> void {});
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
EXPECT_CALL(*resolver.timer_, enableTimer(_, _)).Times(2);
resolver.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1", "127.0.0.2"}));
// Verify that both endpoints are initially marked with FAILED_ACTIVE_HC, then
// clear the flag to simulate that these endpoints have been successfully health
// checked.
{
const auto& hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_EQ(2UL, hosts.size());
for (const auto& host : hosts) {
EXPECT_TRUE(host->healthFlagGet(Host::HealthFlag::FAILED_ACTIVE_HC));
host->healthFlagClear(Host::HealthFlag::FAILED_ACTIVE_HC);
host->healthFlagClear(Host::HealthFlag::PENDING_ACTIVE_HC);
}
}
// Re-resolve the DNS name with only one record
resolver.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1"}));
const auto& hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_EQ(1UL, hosts.size());
}
// Verify that a host is not removed if it is removed from DNS but still passing active health
// checking.
TEST_F(StrictDnsClusterImplTest, HostRemovalAfterHcFail) {
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: STRICT_DNS
lb_policy: ROUND_ROBIN
load_assignment:
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: foo.bar.com
port_value: 443
)EOF";
ResolverData resolver(*dns_resolver_, dispatcher_);
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
std::shared_ptr<MockHealthChecker> health_checker(new MockHealthChecker());
EXPECT_CALL(*health_checker, start());
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
cluster.setHealthChecker(health_checker);
ReadyWatcher initialized;
cluster.initialize([&initialized]() { initialized.ready(); });
EXPECT_CALL(*health_checker, addHostCheckCompleteCb(_));
EXPECT_CALL(*resolver.timer_, enableTimer(_, _)).Times(2);
resolver.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1", "127.0.0.2"}));
// Verify that both endpoints are initially marked with FAILED_ACTIVE_HC, then
// clear the flag to simulate that these endpoints have been successfully health
// checked.
{
const auto& hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_EQ(2UL, hosts.size());
for (size_t i = 0; i < 2; ++i) {
EXPECT_TRUE(hosts[i]->healthFlagGet(Host::HealthFlag::FAILED_ACTIVE_HC));
hosts[i]->healthFlagClear(Host::HealthFlag::FAILED_ACTIVE_HC);
hosts[i]->healthFlagClear(Host::HealthFlag::PENDING_ACTIVE_HC);
if (i == 1) {
EXPECT_CALL(initialized, ready());
}
health_checker->runCallbacks(hosts[i], HealthTransition::Changed);
}
}
// Re-resolve the DNS name with only one record, we should still have 2 hosts.
resolver.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1"}));
{
const auto& hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_EQ(2UL, hosts.size());
EXPECT_FALSE(hosts[0]->healthFlagGet(Host::HealthFlag::PENDING_DYNAMIC_REMOVAL));
EXPECT_TRUE(hosts[1]->healthFlagGet(Host::HealthFlag::PENDING_DYNAMIC_REMOVAL));
hosts[1]->healthFlagSet(Host::HealthFlag::FAILED_ACTIVE_HC);
health_checker->runCallbacks(hosts[1], HealthTransition::Changed);
}
// Unlike EDS we will not remove if HC is failing but will wait until the next polling interval.
// This may change in the future.
{
const auto& hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_EQ(2UL, hosts.size());
}
}
TEST_F(StrictDnsClusterImplTest, LoadAssignmentBasic) {
// gmock matches in LIFO order which is why these are swapped.
ResolverData resolver3(*dns_resolver_, dispatcher_);
ResolverData resolver2(*dns_resolver_, dispatcher_);
ResolverData resolver1(*dns_resolver_, dispatcher_);
const std::string yaml = R"EOF(
name: name
type: STRICT_DNS
dns_lookup_family: V4_ONLY
connect_timeout: 0.25s
dns_refresh_rate: 4s
dns_failure_refresh_rate:
base_interval: 7s
max_interval: 10s
lb_policy: ROUND_ROBIN
circuit_breakers:
thresholds:
- priority: DEFAULT
max_connections: 43
max_pending_requests: 57
max_requests: 50
max_retries: 10
- priority: HIGH
max_connections: 1
max_pending_requests: 2
max_requests: 3
max_retries: 4
max_requests_per_connection: 3
http2_protocol_options:
hpack_table_size: 0
load_assignment:
policy:
overprovisioning_factor: 100
endpoints:
- lb_endpoints:
- endpoint:
address:
socket_address:
address: localhost1
port_value: 11001
health_check_config:
port_value: 8000
health_status: DEGRADED
- endpoint:
address:
socket_address:
address: localhost2
port_value: 11002
health_check_config:
port_value: 8000
- endpoint:
address:
socket_address:
address: localhost3
port_value: 11002
health_check_config:
port_value: 8000
)EOF";
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_connections", 43));
EXPECT_EQ(43U, cluster.info()->resourceManager(ResourcePriority::Default).connections().max());
EXPECT_CALL(runtime_.snapshot_,
getInteger("circuit_breakers.name.default.max_pending_requests", 57));
EXPECT_EQ(57U,
cluster.info()->resourceManager(ResourcePriority::Default).pendingRequests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_requests", 50));
EXPECT_EQ(50U, cluster.info()->resourceManager(ResourcePriority::Default).requests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.default.max_retries", 10));
EXPECT_EQ(10U, cluster.info()->resourceManager(ResourcePriority::Default).retries().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_connections", 1));
EXPECT_EQ(1U, cluster.info()->resourceManager(ResourcePriority::High).connections().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_pending_requests", 2));
EXPECT_EQ(2U, cluster.info()->resourceManager(ResourcePriority::High).pendingRequests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_requests", 3));
EXPECT_EQ(3U, cluster.info()->resourceManager(ResourcePriority::High).requests().max());
EXPECT_CALL(runtime_.snapshot_, getInteger("circuit_breakers.name.high.max_retries", 4));
EXPECT_EQ(4U, cluster.info()->resourceManager(ResourcePriority::High).retries().max());
EXPECT_EQ(3U, cluster.info()->maxRequestsPerConnection());
EXPECT_EQ(0U, cluster.info()->http2Options().hpack_table_size().value());
cluster.info()->stats().upstream_rq_total_.inc();
EXPECT_EQ(1UL, stats_.counter("cluster.name.upstream_rq_total").value());
EXPECT_CALL(runtime_.snapshot_, featureEnabled("upstream.maintenance_mode.name", 0));
EXPECT_FALSE(cluster.info()->maintenanceMode());
ReadyWatcher membership_updated;
cluster.prioritySet().addPriorityUpdateCb(
[&](uint32_t, const HostVector&, const HostVector&) -> void { membership_updated.ready(); });
cluster.initialize([] {});
resolver1.expectResolve(*dns_resolver_);
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1", "127.0.0.2"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[0]->hostname());
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[1]->hostname());
EXPECT_EQ(100, cluster.prioritySet().hostSetsPerPriority()[0]->overprovisioningFactor());
EXPECT_EQ(Host::Health::Degraded,
cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[0]->health());
EXPECT_EQ(Host::Health::Degraded,
cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[1]->health());
// This is the first time we received an update for localhost1, we expect to rebuild.
EXPECT_EQ(0UL, stats_.counter("cluster.name.update_no_rebuild").value());
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ(100, cluster.prioritySet().hostSetsPerPriority()[0]->overprovisioningFactor());
// Since no change for localhost1, we expect no rebuild.
EXPECT_EQ(1UL, stats_.counter("cluster.name.update_no_rebuild").value());
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ(100, cluster.prioritySet().hostSetsPerPriority()[0]->overprovisioningFactor());
// Since no change for localhost1, we expect no rebuild.
EXPECT_EQ(2UL, stats_.counter("cluster.name.update_no_rebuild").value());
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"10.0.0.1", "10.0.0.1"}));
// We received a new set of hosts for localhost2. Should rebuild the cluster.
EXPECT_EQ(2UL, stats_.counter("cluster.name.update_no_rebuild").value());
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
// We again received the same set as before for localhost1. No rebuild this time.
EXPECT_EQ(3UL, stats_.counter("cluster.name.update_no_rebuild").value());
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.3"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001", "10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
// Make sure we de-dup the same address.
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"10.0.0.1", "10.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001", "10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->degradedHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->hostsPerLocality().get().size());
EXPECT_EQ(1UL,
cluster.prioritySet().hostSetsPerPriority()[0]->healthyHostsPerLocality().get().size());
// Make sure that we *don't* de-dup between resolve targets.
EXPECT_CALL(*resolver3.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver3.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"10.0.0.1"}));
const auto hosts = cluster.prioritySet().hostSetsPerPriority()[0]->hosts();
EXPECT_THAT(std::list<std::string>({"127.0.0.3:11001", "10.0.0.1:11002", "10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(hosts)));
EXPECT_EQ(2UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->degradedHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->hostsPerLocality().get().size());
EXPECT_EQ(1UL,
cluster.prioritySet().hostSetsPerPriority()[0]->healthyHostsPerLocality().get().size());
// Ensure that all host objects in the host list are unique.
for (const auto& host : hosts) {
EXPECT_EQ(1, std::count(hosts.begin(), hosts.end(), host));
}
for (const HostSharedPtr& host : cluster.prioritySet().hostSetsPerPriority()[0]->hosts()) {
EXPECT_EQ(cluster.info().get(), &host->cluster());
}
// Remove the duplicated hosts from both resolve targets and ensure that we don't see the same
// host multiple times.
absl::node_hash_set<HostSharedPtr> removed_hosts;
cluster.prioritySet().addPriorityUpdateCb(
[&](uint32_t, const HostVector&, const HostVector& hosts_removed) -> void {
for (const auto& host : hosts_removed) {
EXPECT_EQ(removed_hosts.end(), removed_hosts.find(host));
removed_hosts.insert(host);
}
});
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({}));
EXPECT_CALL(*resolver3.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver3.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({}));
// Ensure that we called the update membership callback.
EXPECT_EQ(2, removed_hosts.size());
// Make sure we cancel.
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
resolver2.expectResolve(*dns_resolver_);
resolver2.timer_->invokeCallback();
resolver3.expectResolve(*dns_resolver_);
resolver3.timer_->invokeCallback();
EXPECT_CALL(resolver1.active_dns_query_, cancel());
EXPECT_CALL(resolver2.active_dns_query_, cancel());
EXPECT_CALL(resolver3.active_dns_query_, cancel());
}
TEST_F(StrictDnsClusterImplTest, LoadAssignmentBasicMultiplePriorities) {
ResolverData resolver3(*dns_resolver_, dispatcher_);
ResolverData resolver2(*dns_resolver_, dispatcher_);
ResolverData resolver1(*dns_resolver_, dispatcher_);
const std::string yaml = R"EOF(
name: name
type: STRICT_DNS
dns_lookup_family: V4_ONLY
connect_timeout: 0.25s
dns_refresh_rate: 4s
lb_policy: ROUND_ROBIN
load_assignment:
endpoints:
- priority: 0
lb_endpoints:
- endpoint:
address:
socket_address:
address: localhost1
port_value: 11001
health_check_config:
port_value: 8000
- endpoint:
address:
socket_address:
address: localhost2
port_value: 11002
health_check_config:
port_value: 8000
- priority: 1
lb_endpoints:
- endpoint:
address:
socket_address:
address: localhost3
port_value: 11003
health_check_config:
port_value: 8000
)EOF";
envoy::config::cluster::v3::Cluster cluster_config = parseClusterFromV3Yaml(yaml);
Envoy::Stats::ScopePtr scope = stats_.createScope(fmt::format(
"cluster.{}.", cluster_config.alt_stat_name().empty() ? cluster_config.name()
: cluster_config.alt_stat_name()));
Envoy::Server::Configuration::TransportSocketFactoryContextImpl factory_context(
admin_, ssl_context_manager_, *scope, cm_, local_info_, dispatcher_, stats_,
singleton_manager_, tls_, validation_visitor_, *api_);
StrictDnsClusterImpl cluster(cluster_config, runtime_, dns_resolver_, factory_context,
std::move(scope), false);
ReadyWatcher membership_updated;
cluster.prioritySet().addPriorityUpdateCb(
[&](uint32_t, const HostVector&, const HostVector&) -> void { membership_updated.ready(); });
cluster.initialize([] {});
resolver1.expectResolve(*dns_resolver_);
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.1", "127.0.0.2"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[0]->hostname());
EXPECT_EQ("localhost1", cluster.prioritySet().hostSetsPerPriority()[0]->hosts()[1]->hostname());
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.2", "127.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.1:11001", "127.0.0.2:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
resolver1.timer_->invokeCallback();
EXPECT_CALL(*resolver1.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver1.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"127.0.0.3"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
// Make sure we de-dup the same address.
EXPECT_CALL(*resolver2.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver2.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"10.0.0.1", "10.0.0.1"}));
EXPECT_THAT(
std::list<std::string>({"127.0.0.3:11001", "10.0.0.1:11002"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[0]->hosts())));
EXPECT_EQ(2UL, cluster.prioritySet().hostSetsPerPriority()[0]->healthyHosts().size());
EXPECT_EQ(1UL, cluster.prioritySet().hostSetsPerPriority()[0]->hostsPerLocality().get().size());
EXPECT_EQ(1UL,
cluster.prioritySet().hostSetsPerPriority()[0]->healthyHostsPerLocality().get().size());
for (const HostSharedPtr& host : cluster.prioritySet().hostSetsPerPriority()[0]->hosts()) {
EXPECT_EQ(cluster.info().get(), &host->cluster());
}
EXPECT_CALL(*resolver3.timer_, enableTimer(std::chrono::milliseconds(4000), _));
EXPECT_CALL(membership_updated, ready());
resolver3.dns_callback_(Network::DnsResolver::ResolutionStatus::Success,
TestUtility::makeDnsResponse({"192.168.1.1", "192.168.1.2"}));
// Make sure we have multiple priorities.
EXPECT_THAT(
std::list<std::string>({"192.168.1.1:11003", "192.168.1.2:11003"}),
ContainerEq(hostListToAddresses(cluster.prioritySet().hostSetsPerPriority()[1]->hosts())));
// Make sure we cancel.
resolver1.expectResolve(*dns_resolver_);
resolver1.timer_->invokeCallback();
resolver2.expectResolve(*dns_resolver_);
resolver2.timer_->invokeCallback();
resolver3.expectResolve(*dns_resolver_);
resolver3.timer_->invokeCallback();
EXPECT_CALL(resolver1.active_dns_query_, cancel());
EXPECT_CALL(resolver2.active_dns_query_, cancel());
EXPECT_CALL(resolver3.active_dns_query_, cancel());
}
// Verifies that specifying a custom resolver when using STRICT_DNS fails
TEST_F(StrictDnsClusterImplTest, CustomResolverFails) {
const std::string yaml = R"EOF(
name: name
connect_timeout: 0.25s
type: STRICT_DNS