基本介绍
GoFrame
框架提供了服务注册发现组件,由 gsvc
组件管理,该组件主要定义了注册发现的接口,具体的实现由社区组件提供: https://github.com/gogf/gf/tree/master/contrib/registry 。目前社区组件提供了多种注册发现的实现,如 etcd, zookeeper, polaris
等,开发者根据需要插拔使用,也可以根据 gsvc
组件的接口定义实现自己的注册发现组件。
组件启用
注册发现组件只有在引入具体的接口实现时才会启用。例如,使用 etcd
实现注册发 现的使用方式:
package main
import (
"github.com/gogf/gf/contrib/registry/etcd/v2"
"github.com/gogf/gf/v2/net/gsvc"
)
func main() {
gsvc.SetRegistry(etcd.New(`127.0.0.1:2379`))
// ...
}
常用组件
更多组件,请参考: https://github.com/gogf/gf/tree/master/contrib/registry
使用示例
HTTP
可以使用 gsvc.SetRegistry(etcd.New(`127.0.0.1:2379`))
来设置使用 etcd
的注册发现。其中的 etcd.New
表示通过社区组件创建一个 gsvc.Registry
的接口实现 对象,并通过 gsvc.SetRegistry
方法设置全局默认的注册发现接口实现对象。
server.go
package main
import (
"github.com/gogf/gf/contrib/registry/etcd/v2"
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/net/ghttp"
"github.com/gogf/gf/v2/net/gsvc"
)
func main() {
gsvc.SetRegistry(etcd.New(`127.0.0.1:2379`))
s := g.Server(`hello.svc`)
s.BindHandler("/", func(r *ghttp.Request) {
g.Log().Info(r.Context(), `request received`)
r.Response.Write(`Hello world`)
})
s.Run()
}
client.go
package main
import (
"github.com/gogf/gf/contrib/registry/etcd/v2"
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/net/gsvc"
"github.com/gogf/gf/v2/os/gctx"
)
func main() {
gsvc.SetRegistry(etcd.New(`127.0.0.1:2379`))
ctx := gctx.New()
res := g.Client().GetContent(ctx, `http://hello.svc/`)
g.Log().Info(ctx, res)
}
执行后,服务端输出:
$ go run server.go
2023-03-15 20:55:56.256 [INFO] pid[3358]: http server started listening on [:60700]
2023-03-15 20:55:56.256 [INFO] openapi specification is disabled
2023-03-15 20:55:56.256 [DEBU] service register: &{Head: Deployment: Namespace: Name:hello.svc Version: Endpoints:10.35.12.81:60700 Metadata:map[insecure:true protocol:http]}
2023-03-15 20:55:56.297 [DEBU] etcd put success with key "/service/default/default/hello.svc/latest/10.35.12.81:60700", value "{"insecure":true,"protocol":"http"}", lease "7587869265945813002"
SERVER | DOMAIN | ADDRESS | METHOD | ROUTE | HANDLER | MIDDLEWARE
------------|---------|---------|--------|-------|-----------------------------------------------------------------|--------------------
hello.svc | default | :60700 | ALL | / | main.main.func1 |
------------|---------|---------|--------|-------|-----------------------------------------------------------------|--------------------
hello.svc | default | :60700 | ALL | /* | github.com/gogf/gf/v2/net/ghttp.internalMiddlewareServerTracing | GLOBAL MIDDLEWARE
------------|---------|---------|--------|-------|-----------------------------------------------------------------|--------------------
2023-03-15 20:56:45.739 [INFO] {880eaa8104994c17ffb384495cd4c613} request received
客户端输出:
$ go run client.go
2023-03-15 20:56:45.739 [INFO] {880eaa8104994c17ffb384495cd4c613} Hello world
GRPC
如果是 GRPC
协议,必须使用 grpcx.Resolver
的 grpcx
模块来设置服务注册发现组件。 Server
端未在 config.yaml
中设置 grpc.name
值时,默认值是 default
。
server.go
代码中的 etcd.New
表示通过社区组件创建一个 gsvc.Registry
的接口实现对象,并通过 grpcx.Resolver.Register
设置全局的 grpc
注册发现接口实现对象。
package main
import (
"github.com/gogf/gf/contrib/registry/etcd/v2"
"github.com/gogf/gf/contrib/rpc/grpcx/v2"
"github.com/gogf/gf/example/registry/etcd/grpc/controller"
)
func main() {
grpcx.Resolver.Register(etcd.New("127.0.0.1:2379"))
s := grpcx.Server.New()
controller.Register(s)
s.Run()
}
config.yaml
服务端默认的配置文件:
grpc:
name: "demo" # 服务名称
address: ":8000" # 自定义服务监听地址
logPath: "./log" # 日志存储目录路径
logStdout: true # 日志是否输出到终端
errorLogEnabled: true # 是否开启错误日志记录
accessLogEnabled: true # 是否开启访问日志记录
errorStack: true # 当产生错误时,是否记录错误堆栈
client.go
package main
import (
"github.com/gogf/gf/contrib/registry/etcd/v2"
"github.com/gogf/gf/contrib/rpc/grpcx/v2"
"github.com/gogf/gf/example/registry/etcd/grpc/protobuf"
"github.com/gogf/gf/v2/frame/g"
"github.com/gogf/gf/v2/os/gctx"
)
func main() {
grpcx.Resolver.Register(etcd.New("127.0.0.1:2379"))
var (
ctx = gctx.New()
conn = grpcx.Client.MustNewGrpcClientConn("demo")
client = protobuf.NewGreeterClient(conn)
)
res, err := client.SayHello(ctx, &protobuf.HelloRequest{Name: "World"})
if err != nil {
g.Log().Error(ctx, err)
return
}
g.Log().Debug(ctx, "Response:", res.Message)
}
执行后,服务端输出:
$ go run server.go
2023-03-15 21:06:57.204 [DEBU] service register: &{Head: Deployment: Namespace: Name:demo Version: Endpoints:10.35.12.81:61978 Metadata:map[protocol:grpc]}
2023-03-15 21:06:57.257 [DEBU] etcd put success with key "/service/default/default/demo/latest/10.35.12.81:61978", value "{"protocol":"grpc"}", lease "7587869265945813015"
2023-03-15 21:06:57.257 [INFO] pid[5786]: grpc server started listening on [:61978]
2023-03-15 21:07:04.955 {08f0aead94994c1731591d2b653ddc18} /protobuf.Greeter/SayHello, 0.002ms, name:"World", message:"Hello World"
客户端输出:
$ go run client.go
2023-03-15 21:07:04.950 [DEBU] Watch key "/service/default/default/demo/latest/"
2023-03-15 21:07:04.952 [DEBU] client conn updated with addresses [{"Addr":"10.35.12.81:61978","ServerName":"demo","Attributes":{},"BalancerAttributes":null,"Type":0,"Metadata":null}]
2023-03-15 21:07:04.953 [DEBU] client conn updated with addresses [{"Addr":"10.35.12.81:61978","ServerName":"demo","Attributes":{},"BalancerAttributes":null,"Type":0,"Metadata":null}]
2023-03-15 21:07:04.955 [DEBU] {08f0aead94994c1731591d2b653ddc18} Response: Hello World