地址发现 on Apache Dubbo

使用 Nacos 作为注册中心

Mon, 01 Jan 0001 00:00:00 +0000

This example shows dubbo-go’s service discovery feature with Nacos as registry.

使用方式

通过以下方式指定注册中心地址：

ins, _ := dubbo.NewInstance(
	dubbo.WithName("dubbo_registry_nacos_server"),
	dubbo.WithRegistry(
		registry.WithNacos(),
		registry.WithAddress("127.0.0.1:8848"),
	),
	dubbo.WithProtocol(
		protocol.WithTriple(),
		protocol.WithPort(20000),
	),
)

srv, err := ins.NewServer()

How to run

Start Nacos server

Follow this instruction to install and start Nacos server.

Run server

$ go run ./go-server/cmd/server.go

test rpc server work as expected:

$ curl \
 --header "Content-Type: application/json" \
 --data '{"name": "Dubbo"}' \
 http://localhost:20000/greet.GreetService/Greet

Open https://localhost:8848/nacos/ with browser, check url address successfully registered into Nacos.

使用 Zookeeper 作为注册中心

Mon, 01 Jan 0001 00:00:00 +0000

This example shows dubbo-go’s service discovery feature with Zookeeper as registry.

使用方式

通过以下方式指定注册中心地址：

ins, _ := dubbo.NewInstance(
	dubbo.WithName("dubbo_registry_nacos_server"),
	dubbo.WithRegistry(
		registry.WithZookeeper(),
		registry.WithAddress("127.0.0.1:2181"),
	),
	dubbo.WithProtocol(
		protocol.WithTriple(),
		protocol.WithPort(20000),
	),
)

srv, err := ins.NewServer()

How to run

Start Zookeeper server

This example relies on zookeeper as registry, follow the steps below to start a zookeeper server first.

Start zookeeper with docker, run docker run --rm -p 2181:2181 zookeeper or make -f $DUBBO_GO_SAMPLES_ROOT_PATH/build/Makefile docker-up.
Download and start zookeeper locally on your machine.

Run server

$ go run ./go-server/cmd/server.go

test rpc server work as expected:

多注册中心

Mon, 01 Jan 0001 00:00:00 +0000

一个 Dubbo 应用可以配置的多个接口维度的注册中心，多注册中心可用于集群隔离、迁移等多种场景，关于这部分更详细的说明可参考 Dubbo Java 多注册中心说明。

API配置方式

ins, _ := dubbo.NewInstance(
	dubbo.WithRegistry(
	 registryWithID("nacos"),
		registry.WithNacos(),
		registry.WithAddress("127.0.0.1:8848"),
	),
	dubbo.WithRegistry(
	 registryWithID("zookeeper"),
		registry.WithZookeeper(),
		registry.WithAddress("127.0.0.1:2181"),
	),
)

指定某个 server 下的服务注册到哪个注册中心：

// 指定 server 下的服务注册到 zookeeper 注册中心
srv, _ := ins.NewServer(server.WithServerRegistryIDs([]string{"zookeeper"}))

// 指定 server 下的服务注册到 nacos 注册中心
srv2, _ := ins.NewServer(server.WithServerRegistryIDs([]string{"nacos"}))

指定某个特定服务注册到哪个注册中心：

srv, _ := ins.NewServer()

greet.RegisterGreetServiceHandler(srv, &GreetTripleServer{}, server.WithRegistryIDs([]string{"zookeeper"}))

以上使用方式对 client 侧类似。

YAML配置方式

修改服务端配置 go-server/conf/dubbogo.yaml，同时将服务注册在两个注册中心上。

dubbo:
 registries:
 zookeeper: # 指定 zookeeper 注册中心
 protocol: zookeeper
 address: 127.0.0.1:2181
 nacos: # 指定 nacos 注册中心
 protocol: nacos
 address: 127.0.0.1:8848
 protocols:
 triple:
 name: tri
 port: 20000

支持的注册中心

Nacos
Zookeeper
Polaris
Kubernetes

比如使用 Polaris 作为注册中心时，你需要指定以下内容，使用 API 或 YAML 配置文件均可以：