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service.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package frontend
import (
"math/rand"
"net"
"os"
"sync/atomic"
"time"
"go.temporal.io/api/operatorservice/v1"
"go.temporal.io/api/workflowservice/v1"
"google.golang.org/grpc"
"google.golang.org/grpc/health"
healthpb "google.golang.org/grpc/health/grpc_health_v1"
"google.golang.org/grpc/reflection"
"go.temporal.io/server/api/adminservice/v1"
"go.temporal.io/server/common"
"go.temporal.io/server/common/dynamicconfig"
"go.temporal.io/server/common/log"
"go.temporal.io/server/common/log/tag"
"go.temporal.io/server/common/membership"
"go.temporal.io/server/common/metrics"
"go.temporal.io/server/common/namespace"
"go.temporal.io/server/common/persistence/client"
"go.temporal.io/server/common/persistence/visibility"
"go.temporal.io/server/common/persistence/visibility/manager"
"go.temporal.io/server/common/util"
)
// Config represents configuration for frontend service
type Config struct {
NumHistoryShards int32
PersistenceMaxQPS dynamicconfig.IntPropertyFn
PersistenceGlobalMaxQPS dynamicconfig.IntPropertyFn
PersistenceNamespaceMaxQPS dynamicconfig.IntPropertyFnWithNamespaceFilter
PersistencePerShardNamespaceMaxQPS dynamicconfig.IntPropertyFnWithNamespaceFilter
EnablePersistencePriorityRateLimiting dynamicconfig.BoolPropertyFn
PersistenceDynamicRateLimitingParams dynamicconfig.MapPropertyFn
VisibilityPersistenceMaxReadQPS dynamicconfig.IntPropertyFn
VisibilityPersistenceMaxWriteQPS dynamicconfig.IntPropertyFn
VisibilityMaxPageSize dynamicconfig.IntPropertyFnWithNamespaceFilter
EnableReadFromSecondaryVisibility dynamicconfig.BoolPropertyFnWithNamespaceFilter
VisibilityDisableOrderByClause dynamicconfig.BoolPropertyFnWithNamespaceFilter
VisibilityEnableManualPagination dynamicconfig.BoolPropertyFnWithNamespaceFilter
HistoryMaxPageSize dynamicconfig.IntPropertyFnWithNamespaceFilter
RPS dynamicconfig.IntPropertyFn
NamespaceReplicationInducingAPIsRPS dynamicconfig.IntPropertyFn
MaxNamespaceRPSPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceBurstPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceCountPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceVisibilityRPSPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceVisibilityBurstPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceNamespaceReplicationInducingAPIsRPSPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxNamespaceNamespaceReplicationInducingAPIsBurstPerInstance dynamicconfig.IntPropertyFnWithNamespaceFilter
GlobalNamespaceRPS dynamicconfig.IntPropertyFnWithNamespaceFilter
InternalFEGlobalNamespaceRPS dynamicconfig.IntPropertyFnWithNamespaceFilter
GlobalNamespaceVisibilityRPS dynamicconfig.IntPropertyFnWithNamespaceFilter
InternalFEGlobalNamespaceVisibilityRPS dynamicconfig.IntPropertyFnWithNamespaceFilter
GlobalNamespaceNamespaceReplicationInducingAPIsRPS dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxIDLengthLimit dynamicconfig.IntPropertyFn
WorkerBuildIdSizeLimit dynamicconfig.IntPropertyFn
ReachabilityTaskQueueScanLimit dynamicconfig.IntPropertyFn
ReachabilityQueryBuildIdLimit dynamicconfig.IntPropertyFn
ReachabilityQuerySetDurationSinceDefault dynamicconfig.DurationPropertyFn
DisallowQuery dynamicconfig.BoolPropertyFnWithNamespaceFilter
ShutdownDrainDuration dynamicconfig.DurationPropertyFn
ShutdownFailHealthCheckDuration dynamicconfig.DurationPropertyFn
MaxBadBinaries dynamicconfig.IntPropertyFnWithNamespaceFilter
// security protection settings
DisableListVisibilityByFilter dynamicconfig.BoolPropertyFnWithNamespaceFilter
// size limit system protection
BlobSizeLimitError dynamicconfig.IntPropertyFnWithNamespaceFilter
BlobSizeLimitWarn dynamicconfig.IntPropertyFnWithNamespaceFilter
ThrottledLogRPS dynamicconfig.IntPropertyFn
// Namespace specific config
EnableNamespaceNotActiveAutoForwarding dynamicconfig.BoolPropertyFnWithNamespaceFilter
SearchAttributesNumberOfKeysLimit dynamicconfig.IntPropertyFnWithNamespaceFilter
SearchAttributesSizeOfValueLimit dynamicconfig.IntPropertyFnWithNamespaceFilter
SearchAttributesTotalSizeLimit dynamicconfig.IntPropertyFnWithNamespaceFilter
// DefaultWorkflowRetryPolicy represents default values for unset fields on a Workflow's
// specified RetryPolicy
DefaultWorkflowRetryPolicy dynamicconfig.MapPropertyFnWithNamespaceFilter
// VisibilityArchival system protection
VisibilityArchivalQueryMaxPageSize dynamicconfig.IntPropertyFn
SendRawWorkflowHistory dynamicconfig.BoolPropertyFnWithNamespaceFilter
// DefaultWorkflowTaskTimeout the default workflow task timeout
DefaultWorkflowTaskTimeout dynamicconfig.DurationPropertyFnWithNamespaceFilter
// EnableServerVersionCheck disables periodic version checking performed by the frontend
EnableServerVersionCheck dynamicconfig.BoolPropertyFn
// EnableTokenNamespaceEnforcement enables enforcement that namespace in completion token matches namespace of the request
EnableTokenNamespaceEnforcement dynamicconfig.BoolPropertyFn
// gRPC keep alive options
// If a client pings too frequently, terminate the connection.
KeepAliveMinTime dynamicconfig.DurationPropertyFn
// Allow pings even when there are no active streams (RPCs)
KeepAlivePermitWithoutStream dynamicconfig.BoolPropertyFn
// Close the connection if a client is idle.
KeepAliveMaxConnectionIdle dynamicconfig.DurationPropertyFn
// Close the connection if it is too old.
KeepAliveMaxConnectionAge dynamicconfig.DurationPropertyFn
// Additive period after MaxConnectionAge after which the connection will be forcibly closed.
KeepAliveMaxConnectionAgeGrace dynamicconfig.DurationPropertyFn
// Ping the client if it is idle to ensure the connection is still active.
KeepAliveTime dynamicconfig.DurationPropertyFn
// Wait for the ping ack before assuming the connection is dead.
KeepAliveTimeout dynamicconfig.DurationPropertyFn
// RPS per every parallel delete executions activity.
// Total RPS is equal to DeleteNamespaceDeleteActivityRPS * DeleteNamespaceConcurrentDeleteExecutionsActivities.
// Default value is 100.
DeleteNamespaceDeleteActivityRPS dynamicconfig.IntPropertyFn
// Page size to read executions from visibility for delete executions activity.
// Default value is 1000.
DeleteNamespacePageSize dynamicconfig.IntPropertyFn
// Number of pages before returning ContinueAsNew from delete executions activity.
// Default value is 256.
DeleteNamespacePagesPerExecution dynamicconfig.IntPropertyFn
// Number of concurrent delete executions activities.
// Must be not greater than 256 and number of worker cores in the cluster.
// Default is 4.
DeleteNamespaceConcurrentDeleteExecutionsActivities dynamicconfig.IntPropertyFn
// Duration for how long namespace stays in database
// after all namespace resources (i.e. workflow executions) are deleted.
// Default is 0, means, namespace will be deleted immediately.
DeleteNamespaceNamespaceDeleteDelay dynamicconfig.DurationPropertyFn
// Enable schedule-related RPCs
EnableSchedules dynamicconfig.BoolPropertyFnWithNamespaceFilter
// Enable batcher RPCs
EnableBatcher dynamicconfig.BoolPropertyFnWithNamespaceFilter
// Batch operation dynamic configs
MaxConcurrentBatchOperation dynamicconfig.IntPropertyFnWithNamespaceFilter
MaxExecutionCountBatchOperation dynamicconfig.IntPropertyFnWithNamespaceFilter
EnableUpdateWorkflowExecution dynamicconfig.BoolPropertyFnWithNamespaceFilter
EnableUpdateWorkflowExecutionAsyncAccepted dynamicconfig.BoolPropertyFnWithNamespaceFilter
EnableWorkerVersioningData dynamicconfig.BoolPropertyFnWithNamespaceFilter
EnableWorkerVersioningWorkflow dynamicconfig.BoolPropertyFnWithNamespaceFilter
}
// NewConfig returns new service config with default values
func NewConfig(
dc *dynamicconfig.Collection,
numHistoryShards int32,
visibilityStoreConfigExist bool,
enableReadFromES bool,
) *Config {
return &Config{
NumHistoryShards: numHistoryShards,
PersistenceMaxQPS: dc.GetIntProperty(dynamicconfig.FrontendPersistenceMaxQPS, 2000),
PersistenceGlobalMaxQPS: dc.GetIntProperty(dynamicconfig.FrontendPersistenceGlobalMaxQPS, 0),
PersistenceNamespaceMaxQPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendPersistenceNamespaceMaxQPS, 0),
PersistencePerShardNamespaceMaxQPS: dynamicconfig.DefaultPerShardNamespaceRPSMax,
EnablePersistencePriorityRateLimiting: dc.GetBoolProperty(dynamicconfig.FrontendEnablePersistencePriorityRateLimiting, true),
PersistenceDynamicRateLimitingParams: dc.GetMapProperty(dynamicconfig.FrontendPersistenceDynamicRateLimitingParams, dynamicconfig.DefaultDynamicRateLimitingParams),
VisibilityPersistenceMaxReadQPS: visibility.GetVisibilityPersistenceMaxReadQPS(dc, enableReadFromES),
VisibilityPersistenceMaxWriteQPS: visibility.GetVisibilityPersistenceMaxWriteQPS(dc, enableReadFromES),
VisibilityMaxPageSize: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendVisibilityMaxPageSize, 1000),
EnableReadFromSecondaryVisibility: visibility.GetEnableReadFromSecondaryVisibilityConfig(dc, visibilityStoreConfigExist, enableReadFromES),
VisibilityDisableOrderByClause: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.VisibilityDisableOrderByClause, true),
VisibilityEnableManualPagination: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.VisibilityEnableManualPagination, true),
HistoryMaxPageSize: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendHistoryMaxPageSize, common.GetHistoryMaxPageSize),
RPS: dc.GetIntProperty(dynamicconfig.FrontendRPS, 2400),
NamespaceReplicationInducingAPIsRPS: dc.GetIntProperty(dynamicconfig.FrontendNamespaceReplicationInducingAPIsRPS, 20),
MaxNamespaceRPSPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceRPSPerInstance, 2400),
MaxNamespaceBurstPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceBurstPerInstance, 4800),
MaxNamespaceCountPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceCountPerInstance, 1200),
MaxNamespaceVisibilityRPSPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceVisibilityRPSPerInstance, 10),
MaxNamespaceVisibilityBurstPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceVisibilityBurstPerInstance, 10),
MaxNamespaceNamespaceReplicationInducingAPIsRPSPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceNamespaceReplicationInducingAPIsRPSPerInstance, 1),
MaxNamespaceNamespaceReplicationInducingAPIsBurstPerInstance: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxNamespaceNamespaceReplicationInducingAPIsBurstPerInstance, 10),
GlobalNamespaceRPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendGlobalNamespaceRPS, 0),
InternalFEGlobalNamespaceRPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.InternalFrontendGlobalNamespaceRPS, 0),
GlobalNamespaceVisibilityRPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendGlobalNamespaceVisibilityRPS, 0),
InternalFEGlobalNamespaceVisibilityRPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.InternalFrontendGlobalNamespaceVisibilityRPS, 0),
// Overshoot since these low rate limits don't work well in an uncoordinated global limiter.
GlobalNamespaceNamespaceReplicationInducingAPIsRPS: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendGlobalNamespaceNamespaceReplicationInducingAPIsRPS, 10),
MaxIDLengthLimit: dc.GetIntProperty(dynamicconfig.MaxIDLengthLimit, 1000),
WorkerBuildIdSizeLimit: dc.GetIntProperty(dynamicconfig.WorkerBuildIdSizeLimit, 255),
ReachabilityTaskQueueScanLimit: dc.GetIntProperty(dynamicconfig.ReachabilityTaskQueueScanLimit, 20),
ReachabilityQueryBuildIdLimit: dc.GetIntProperty(dynamicconfig.ReachabilityQueryBuildIdLimit, 5),
ReachabilityQuerySetDurationSinceDefault: dc.GetDurationProperty(dynamicconfig.ReachabilityQuerySetDurationSinceDefault, 5*time.Minute),
MaxBadBinaries: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxBadBinaries, namespace.MaxBadBinaries),
DisableListVisibilityByFilter: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.DisableListVisibilityByFilter, false),
BlobSizeLimitError: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.BlobSizeLimitError, 2*1024*1024),
BlobSizeLimitWarn: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.BlobSizeLimitWarn, 256*1024),
ThrottledLogRPS: dc.GetIntProperty(dynamicconfig.FrontendThrottledLogRPS, 20),
ShutdownDrainDuration: dc.GetDurationProperty(dynamicconfig.FrontendShutdownDrainDuration, 0*time.Second),
ShutdownFailHealthCheckDuration: dc.GetDurationProperty(dynamicconfig.FrontendShutdownFailHealthCheckDuration, 0*time.Second),
EnableNamespaceNotActiveAutoForwarding: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.EnableNamespaceNotActiveAutoForwarding, true),
SearchAttributesNumberOfKeysLimit: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.SearchAttributesNumberOfKeysLimit, 100),
SearchAttributesSizeOfValueLimit: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.SearchAttributesSizeOfValueLimit, 2*1024),
SearchAttributesTotalSizeLimit: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.SearchAttributesTotalSizeLimit, 40*1024),
VisibilityArchivalQueryMaxPageSize: dc.GetIntProperty(dynamicconfig.VisibilityArchivalQueryMaxPageSize, 10000),
DisallowQuery: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.DisallowQuery, false),
SendRawWorkflowHistory: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.SendRawWorkflowHistory, false),
DefaultWorkflowRetryPolicy: dc.GetMapPropertyFnWithNamespaceFilter(dynamicconfig.DefaultWorkflowRetryPolicy, common.GetDefaultRetryPolicyConfigOptions()),
DefaultWorkflowTaskTimeout: dc.GetDurationPropertyFilteredByNamespace(dynamicconfig.DefaultWorkflowTaskTimeout, common.DefaultWorkflowTaskTimeout),
EnableServerVersionCheck: dc.GetBoolProperty(dynamicconfig.EnableServerVersionCheck, os.Getenv("TEMPORAL_VERSION_CHECK_DISABLED") == ""),
EnableTokenNamespaceEnforcement: dc.GetBoolProperty(dynamicconfig.EnableTokenNamespaceEnforcement, true),
KeepAliveMinTime: dc.GetDurationProperty(dynamicconfig.KeepAliveMinTime, 10*time.Second),
KeepAlivePermitWithoutStream: dc.GetBoolProperty(dynamicconfig.KeepAlivePermitWithoutStream, true),
KeepAliveMaxConnectionIdle: dc.GetDurationProperty(dynamicconfig.KeepAliveMaxConnectionIdle, 2*time.Minute),
KeepAliveMaxConnectionAge: dc.GetDurationProperty(dynamicconfig.KeepAliveMaxConnectionAge, 5*time.Minute),
KeepAliveMaxConnectionAgeGrace: dc.GetDurationProperty(dynamicconfig.KeepAliveMaxConnectionAgeGrace, 70*time.Second),
KeepAliveTime: dc.GetDurationProperty(dynamicconfig.KeepAliveTime, 1*time.Minute),
KeepAliveTimeout: dc.GetDurationProperty(dynamicconfig.KeepAliveTimeout, 10*time.Second),
DeleteNamespaceDeleteActivityRPS: dc.GetIntProperty(dynamicconfig.DeleteNamespaceDeleteActivityRPS, 100),
DeleteNamespacePageSize: dc.GetIntProperty(dynamicconfig.DeleteNamespacePageSize, 1000),
DeleteNamespacePagesPerExecution: dc.GetIntProperty(dynamicconfig.DeleteNamespacePagesPerExecution, 256),
DeleteNamespaceConcurrentDeleteExecutionsActivities: dc.GetIntProperty(dynamicconfig.DeleteNamespaceConcurrentDeleteExecutionsActivities, 4),
DeleteNamespaceNamespaceDeleteDelay: dc.GetDurationProperty(dynamicconfig.DeleteNamespaceNamespaceDeleteDelay, 0*time.Hour),
EnableSchedules: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableSchedules, true),
EnableBatcher: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableBatcher, true),
MaxConcurrentBatchOperation: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxConcurrentBatchOperationPerNamespace, 1),
MaxExecutionCountBatchOperation: dc.GetIntPropertyFilteredByNamespace(dynamicconfig.FrontendMaxExecutionCountBatchOperationPerNamespace, 1000),
EnableUpdateWorkflowExecution: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableUpdateWorkflowExecution, false),
EnableUpdateWorkflowExecutionAsyncAccepted: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableUpdateWorkflowExecutionAsyncAccepted, false),
EnableWorkerVersioningData: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableWorkerVersioningDataAPIs, false),
EnableWorkerVersioningWorkflow: dc.GetBoolPropertyFnWithNamespaceFilter(dynamicconfig.FrontendEnableWorkerVersioningWorkflowAPIs, false),
}
}
// Service represents the frontend service
type Service struct {
status int32
config *Config
healthServer *health.Server
handler Handler
adminHandler *AdminHandler
operatorHandler *OperatorHandlerImpl
versionChecker *VersionChecker
visibilityManager manager.VisibilityManager
server *grpc.Server
logger log.Logger
grpcListener net.Listener
metricsHandler metrics.Handler
faultInjectionDataStoreFactory *client.FaultInjectionDataStoreFactory
membershipMonitor membership.Monitor
}
func NewService(
serviceConfig *Config,
server *grpc.Server,
healthServer *health.Server,
handler Handler,
adminHandler *AdminHandler,
operatorHandler *OperatorHandlerImpl,
versionChecker *VersionChecker,
visibilityMgr manager.VisibilityManager,
logger log.Logger,
grpcListener net.Listener,
metricsHandler metrics.Handler,
faultInjectionDataStoreFactory *client.FaultInjectionDataStoreFactory,
membershipMonitor membership.Monitor,
) *Service {
return &Service{
status: common.DaemonStatusInitialized,
config: serviceConfig,
server: server,
healthServer: healthServer,
handler: handler,
adminHandler: adminHandler,
operatorHandler: operatorHandler,
versionChecker: versionChecker,
visibilityManager: visibilityMgr,
logger: logger,
grpcListener: grpcListener,
metricsHandler: metricsHandler,
faultInjectionDataStoreFactory: faultInjectionDataStoreFactory,
membershipMonitor: membershipMonitor,
}
}
// Start starts the service
func (s *Service) Start() {
if !atomic.CompareAndSwapInt32(&s.status, common.DaemonStatusInitialized, common.DaemonStatusStarted) {
return
}
logger := s.logger
logger.Info("frontend starting")
healthpb.RegisterHealthServer(s.server, s.healthServer)
workflowservice.RegisterWorkflowServiceServer(s.server, s.handler)
adminservice.RegisterAdminServiceServer(s.server, s.adminHandler)
operatorservice.RegisterOperatorServiceServer(s.server, s.operatorHandler)
reflection.Register(s.server)
// must start resource first
s.metricsHandler.Counter(metrics.RestartCount).Record(1)
rand.Seed(time.Now().UnixNano())
s.versionChecker.Start()
s.adminHandler.Start()
s.operatorHandler.Start()
s.handler.Start()
go s.membershipMonitor.Start()
logger.Info("Starting to serve on frontend listener")
if err := s.server.Serve(s.grpcListener); err != nil {
logger.Fatal("Failed to serve on frontend listener", tag.Error(err))
}
}
// Stop stops the service
func (s *Service) Stop() {
logger := s.logger
if !atomic.CompareAndSwapInt32(&s.status, common.DaemonStatusStarted, common.DaemonStatusStopped) {
return
}
// initiate graceful shutdown:
// 1. Fail rpc health check, this will cause client side load balancer to stop forwarding requests to this node
// 2. wait for failure detection time
// 3. stop taking new requests by returning InternalServiceError
// 4. Wait for X second
// 5. Stop everything forcefully and return
requestDrainTime := util.Max(time.Second, s.config.ShutdownDrainDuration())
failureDetectionTime := util.Max(0, s.config.ShutdownFailHealthCheckDuration())
logger.Info("ShutdownHandler: Updating gRPC health status to ShuttingDown")
s.healthServer.Shutdown()
logger.Info("ShutdownHandler: Waiting for others to discover I am unhealthy")
time.Sleep(failureDetectionTime)
s.handler.Stop()
s.operatorHandler.Stop()
s.adminHandler.Stop()
s.versionChecker.Stop()
s.visibilityManager.Close()
logger.Info("ShutdownHandler: Draining traffic")
t := time.AfterFunc(requestDrainTime, func() {
logger.Info("ShutdownHandler: Drain time expired, stopping all traffic")
s.server.Stop()
})
s.server.GracefulStop()
t.Stop()
if s.metricsHandler != nil {
s.metricsHandler.Stop(logger)
}
logger.Info("frontend stopped")
}
func namespaceRPS(
perInstanceRPSFn dynamicconfig.IntPropertyFnWithNamespaceFilter,
globalRPSFn dynamicconfig.IntPropertyFnWithNamespaceFilter,
frontendResolver membership.ServiceResolver,
namespace string,
) float64 {
globalRPS := float64(globalRPSFn(namespace))
if globalRPS > 0 && frontendResolver != nil {
hosts := float64(numFrontendHosts(frontendResolver))
return globalRPS / hosts
}
hostRPS := float64(perInstanceRPSFn(namespace))
return hostRPS
}
func numFrontendHosts(
frontendResolver membership.ServiceResolver,
) int {
defaultHosts := 1
if frontendResolver == nil {
return defaultHosts
}
ringSize := frontendResolver.MemberCount()
if ringSize < defaultHosts {
return defaultHosts
}
return ringSize
}
func (s *Service) GetFaultInjection() *client.FaultInjectionDataStoreFactory {
return s.faultInjectionDataStoreFactory
}