grpcpolaris

package module
v1.13.1 Latest Latest
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 Go to latest Published: Jun 29, 2023 License: Apache-2.0, BSD-2-Clause, BSD-3-Clause, + 3 more Imports: 33 Imported by: 2

README

gRPC-Go with Polaris

English | 简体中文

Introduction

gRPC-Go-Polaris provides a series of components based on gRPC-Go framework, developers can use gRPC-Go-Polaris to build distributed gRPC-Go applications.

Key Features

  • Service Registration and Heartbeat: To register the gRPC Service and send heartbeat periodly.
  • Service Routing and LoadBalancing: Implement gRPC resover and balancer, providing semantic rule routing and loadbalacing cases.
  • Fault node circuitbreaking: Kick of the unhealthy nodes when loadbalacing, base on the service invoke successful rate.
  • RateLimiting: Implement gRPC interceptor, providing request ratelimit check to ensure the reliability for server.

Base Architecture

arch gRPC-Go-Polaris implements the interfaces on gRPC-Go, to access polarismesh functions.

How To Use

Prerequisites
  • Go: any one of the three latest major releases.
Installation

With Go module support (Go 1.11+), simply add the following import

import "github.com/polarismesh/grpc-go-polaris"

to your code, and then go [build|run|test] will automatically fetch the necessary dependencies.

Otherwise, to install the grpc-go-polaris package, run the following command:

$ go get -u github.com/polarismesh/grpc-go-polaris

Note: gRPC-Go-Polaris has gRPC-Go dependencies, it will encounter timeout while go getting gRPC-Go in China, to solution the problem, you can refer FAQ.

Examples

Documentation

Overview

Package grpcpolaris grpc-go integrates with polaris-go

Index

Constants

This section is empty.

Variables

View Source 
var (
	// DefaultNamespace default namespace when namespace is not set
	DefaultNamespace = "default"
	// DefaultTTL default ttl value when ttl is not set
	DefaultTTL = 20
	// DefaultGracefulStopMaxWaitDuration default stop max wait duration when not set
	DefaultGracefulStopMaxWaitDuration = 30 * time.Second
	// DefaultDelayStopWaitDuration default delay time before stop
	DefaultDelayStopWaitDuration = 4 * 2 * time.Second
	// MinGracefulStopWaitDuration low bound of stop wait duration
	MinGracefulStopWaitDuration = 5 * time.Second
)
View Source 
var (
	// ErrorPolarisServiceRouteRuleEmpty error service route rule is empty
	ErrorPolarisServiceRouteRuleEmpty = errors.New("service route rule is empty")
)

Functions

func BuildTarget 

func BuildTarget(target string, opts ...DialOption) (string, error)

BuildTarget build the invoker grpc target Deprecated: will remove in 1.4

func DialContext 

func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *grpc.ClientConn, err error)

DialContext dial target and get connection

func PolarisConfig 

func PolarisConfig() config.Configuration

PolarisConfig get or init the global polaris configuration

func PolarisContext 

func PolarisContext() (api.SDKContext, error)

PolarisContext get or init the global polaris context

func RegisterResolverInterceptor 

func RegisterResolverInterceptor(i ResolverInterceptor)

RegisterResolverInterceptor NOTE: this function must only be called during initialization time (i.e. in an init() function), and is not thread-safe. If multiple RegisterInterceptor are registered with the same name, the one registered last will take effect.

func RequestScopeLbHashKey 

func RequestScopeLbHashKey(ctx context.Context, key string) context.Context

RequestScopeLbHashKey set request scope LbHashKey

func RequestScopeLbPolicy 

func RequestScopeLbPolicy(ctx context.Context, policy string) context.Context

RequestScopeLbPolicy set request scope LbPolicy

func Serve 

func Serve(gSrv *grpc.Server, lis net.Listener, opts ...ServerOption) error

Serve start polaris server

func SetReportInfoAnalyzer 

func SetReportInfoAnalyzer(analyzer ReportInfoAnalyzer)

SetReportInfoAnalyzer sets report info analyzer

Types

type DelayStrategy 

type DelayStrategy interface {
	// Allow delay strategy is allowed to continue to exec
	Allow() bool
}

DelayStrategy delay register strategy. e.g. wait some time

type DialOption 

type DialOption interface {
	// contains filtered or unexported methods
}

DialOption dialOptions for gRPC-Go-Polaris

func WithClientNamespace 

func WithClientNamespace(namespace string) DialOption

WithClientNamespace set the namespace for dial service

func WithDisableCircuitBreaker 

func WithDisableCircuitBreaker() DialOption

WithDisableCircuitBreaker close polaris circuitbreaker ability

func WithDisableRouter 

func WithDisableRouter() DialOption

WithDisableRouter close polaris route ability

func WithDstMetadata 

func WithDstMetadata(dstMetadata map[string]string) DialOption

WithDstMetadata set the dstMetadata for dial service routing

func WithEnableCircuitBreaker 

func WithEnableCircuitBreaker() DialOption

WithEnableCircuitBreaker open polaris circuitbreaker ability

func WithEnableRouter 

func WithEnableRouter() DialOption

WithEnableRouter open polaris route ability

func WithGRPCDialOptions 

func WithGRPCDialOptions(opts ...grpc.DialOption) DialOption

WithGRPCDialOptions set the raw gRPC dialOption

func WithHeaderPrefix 

func WithHeaderPrefix(headerPrefix []string) DialOption

WithHeaderPrefix set the header filter to get the header values to routing Deprecated: will remove in 1.4

func WithPolarisConfig 

func WithPolarisConfig(polarisCfg config.Configuration) DialOption

WithPolarisConfig set polaris configuration

func WithPolarisContext 

func WithPolarisContext(sdkContext api.SDKContext) DialOption

func WithSrcMetadata 

func WithSrcMetadata(srcMetadata map[string]string) DialOption

WithSrcMetadata set the srcMetadata for dial service routing Deprecated: will remove in 1.4

func WithSrcService 

func WithSrcService(srcService string) DialOption

WithSrcService set the srcMetadata for dial service routing

type LBConfig 

type LBConfig struct {
	serviceconfig.LoadBalancingConfig `json:"-"`
	HashKey                           string `json:"hash_key"`
	LbPolicy                          string `json:"lb_policy"`
}

LBConfig is the LB config for the polaris policy.

type NoopDelayStrategy 

type NoopDelayStrategy struct{}

NoopDelayStrategy noop delay strategy

func (*NoopDelayStrategy) Allow 

func (d *NoopDelayStrategy) Allow() bool

Allow delay strategy is allowed to continue to exec

type RateLimitInterceptor 

type RateLimitInterceptor struct {
	// contains filtered or unexported fields
}

RateLimitInterceptor is a gRPC interceptor that implements rate limiting.

func NewRateLimitInterceptor 

func NewRateLimitInterceptor() *RateLimitInterceptor

NewRateLimitInterceptor creates a new RateLimitInterceptor.

func (*RateLimitInterceptor) UnaryInterceptor 

func (p *RateLimitInterceptor) UnaryInterceptor(ctx context.Context, req interface{},
	info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error)

UnaryInterceptor returns a unary interceptor for rate limiting.

func (*RateLimitInterceptor) WithNamespace 

func (p *RateLimitInterceptor) WithNamespace(namespace string) *RateLimitInterceptor

WithNamespace sets the namespace of the service.

func (*RateLimitInterceptor) WithServiceName 

func (p *RateLimitInterceptor) WithServiceName(svcName string) *RateLimitInterceptor

WithServiceName sets the service name.

type RegisterContext 

type RegisterContext struct {
	// contains filtered or unexported fields
}

RegisterContext context parameters by register

type ReportInfoAnalyzer 

type ReportInfoAnalyzer func(info balancer.DoneInfo) (model.RetStatus, uint32)

ReportInfoAnalyzer analyze balancer.DoneInfo to polaris report info

type ResolverContext 

type ResolverContext struct {
	Target        resolver.Target
	Host          string
	Port          int
	SourceService model.ServiceInfo
}

type ResolverInterceptor 

type ResolverInterceptor interface {
	After(ctx *ResolverContext, response *model.InstancesResponse) *model.InstancesResponse
}

ResolverInterceptor 从 polaris sdk 拉取完 instances 执行过滤

type Server 

type Server struct {
	// contains filtered or unexported fields
}

Server encapsulated server with gRPC option

func Register 

func Register(gSrv *grpc.Server, lis net.Listener, opts ...ServerOption) (*Server, error)

Register server as polaris instances

func (*Server) Deregister 

func (s *Server) Deregister()

Deregister deregister services from polaris

func (*Server) Stop 

func (s *Server) Stop()

Stop deregister and stop

type ServerOption 

type ServerOption interface {
	// contains filtered or unexported methods
}

A ServerOption sets options such as credentials, codec and keepalive parameters, etc.

func WithDelayRegisterEnable 

func WithDelayRegisterEnable(strategy DelayStrategy) ServerOption

WithDelayRegisterEnable enables delay register

func WithDelayStopDisable 

func WithDelayStopDisable() ServerOption

WithDelayStopDisable disable delay stop Deprecated: will remove in 1.4

func WithDelayStopEnable 

func WithDelayStopEnable(strategy DelayStrategy) ServerOption

WithDelayStopEnable enables delay stop Deprecated: will remove in 1.4

func WithGRPCServerOptions 

func WithGRPCServerOptions(opts ...grpc.ServerOption) ServerOption

WithGRPCServerOptions set the raw gRPC serverOptions

func WithGracefulStopDisable 

func WithGracefulStopDisable() ServerOption

WithGracefulStopDisable disable graceful stop

func WithGracefulStopEnable 

func WithGracefulStopEnable(duration time.Duration) ServerOption

WithGracefulStopEnable enables graceful stop

func WithHeartbeatEnable 

func WithHeartbeatEnable(enable bool) ServerOption

WithHeartbeatEnable enables the heartbeat task to instance Deprecated: will remove in 1.4

func WithPort 

func WithPort(port int) ServerOption

WithPort set the port to register instance Deprecated: will remove in 1.4

func WithSDKContext 

func WithSDKContext(sdkContext api.SDKContext) ServerOption

func WithServerApplication 

func WithServerApplication(application string) ServerOption

WithServerApplication set application name Deprecated: use WithServiceName to replace WithServerApplication

func WithServerHost 

func WithServerHost(host string) ServerOption

WithServerHost set the host to register instance

func WithServerMetadata 

func WithServerMetadata(metadata map[string]string) ServerOption

WithServerMetadata set the metadata to register instance

func WithServerNamespace 

func WithServerNamespace(namespace string) ServerOption

WithServerNamespace set the namespace to register instance

func WithServerVersion 

func WithServerVersion(version string) ServerOption

WithServerVersion set the version to register instance

func WithServiceName 

func WithServiceName(svcName string) ServerOption

WithServiceName set the application to register instance

func WithTTL 

func WithTTL(ttl int) ServerOption

WithTTL set the ttl to register instance

func WithToken 

func WithToken(token string) ServerOption

WithToken set the token to do server operations

type WaitDelayStrategy 

type WaitDelayStrategy struct {
	WaitTime time.Duration
}

WaitDelayStrategy wait delay strategy

func (*WaitDelayStrategy) Allow 

func (d *WaitDelayStrategy) Allow() bool

Allow delay strategy is allowed to continue to exec

Source Files

View all Source files

Directories

Path Synopsis
examples
circuitbreak/consumer
circuitbreak/provider
common/pb
quickstart/consumer
quickstart/provider
ratelimit/consumer
ratelimit/provider
routing/consumer
routing/provider
test
hello
mock
tools Module

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