关于自定义网关前提需要了解的三层架构
原架构：
- micro api（localhost：8080） - 作为http入口点
- api服务（go.micro.api.greeter） - 为面向公众提供服务（本身也是一个SRV,但是可以聚合SRV）
-
后端服务（go.micro.srv.greeter，go.micro.srv.user） - 内部范围服务
image.png
三层架构表示：
image.png
一个服务的示例调用流程
1.流程简图
image.png
2.流程明细简图
image.png
自定义网关在windows下的启动自定义服务网关
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --namespace=go.micro --type=service --address 0.0.0.0:8080
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 --server_name go.micro.api api --address=0.0.0.0:9000 --namespace=go.micro --type=service
错误过程示例
使用此方式启动的网关没有问题：
D:\code\go\Mi_Onse\Htypp>micro --registry=etcd --registry_address=192.168.219.130:2379 api --namespace=go.micro --type=service --address 0.0.0.0:8080
2021-01-28 15:14:27 file=api/api.go:285 level=info service=api Registering API Default Handler at /
2021-01-28 15:14:27 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:8080
2021-01-28 15:14:27 [email protected]/service.go:200 level=info service=api Starting [service] go.micro.api
2021-01-28 15:14:27 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:64571
2021-01-28 15:14:27 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: go.micro.api-980caac6-d550-4d36-956f-84186cb69a33
::1 - - [28/Jan/2021:15:14:32 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:14:33 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:14:34 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:14:34 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:14:35 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:14:36 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
使用下面的代码的方式启动：
PS:代码的方式启动网关的时候，需要注意的事项：后面也需要制定启动的类型 感谢一个zcw(275107947) 大佬的答疑解惑！
定制Micro Aai代码方式启动 main.go：
package main
import (
"github.com/micro/go-micro/v2"
"github.com/micro/go-micro/v2/registry"
"github.com/micro/go-micro/v2/registry/etcd"
"github.com/micro/micro/v2/cmd"
)
func init() {
//token := &token.Token{}
//token.InitConfig("127.0.0.1:8500", "micro", "config", "jwt-key", "key")
//plugin.Register(cors.)
}
func main() {
// PrometheusBoot()
// registry
reg := etcd.NewRegistry(registry.Addrs("192.168.219.130:2379"))
cmd.Init(
micro.Name("go.micro.api"), // no effect
micro.Registry(reg),
micro.Address(":8888"),
//micro.WrapClient(micro_hystrix.NewClientWrapper()),
)
}
启动：
D:\code\go\micro-greeter\micro>go run main.go api --handler=api
或
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=api
结果
D:\code\go\micro-greeter\micro>go run main.go api --handler=api
2021-01-28 15:18:48 file=api/api.go:233 level=info service=api Registering API Request Handler at /
2021-01-28 15:18:48 file=api/api.go:308 level=fatal service=api listen tcp :8080: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted.
exit status 1
代码里知道了注册到的服务中心的，如果没有的话也需要加上：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=api
查询服务列表：
D:\code\go\Mi_Onse>micro --registry etcd --registry_address 192.168.219.130:2379 list services
go.micro.api
go.micro.service.greeter
go.micro.service.user
D:\code\go\Mi_Onse>
但是问题是，请求不到我们的服务了！！！！！
image.png
这种方式启动的话，则没有响应提内容返回：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=api --namespace=go.micro --type=service
image.png
另一种方式：
go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=api --namespace=go.micro
结果500：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=api --namespace=go.micro
2021-01-28 15:24:11 file=api/api.go:233 level=info service=api Registering API Request Handler at /
2021-01-28 15:24:11 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:8080
2021-01-28 15:24:11 [email protected]/service.go:200 level=info service=api Starting [service] go.micro.api
2021-01-28 15:24:11 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:8888
2021-01-28 15:24:11 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: go.micro.api-c2fe9b2a-b4f0-4090-ba53-141002b7cdf8
::1 - - [28/Jan/2021:15:24:14 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 94 "" "PostmanRuntime/7.26.8"
500 500 500 500 500 500
500 500 500
500 500
另一种方式：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=http --namespace=go.micro
结果500：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --handler=http --namespace=go.micro
2021-01-28 15:25:26 file=api/api.go:259 level=info service=api Registering API HTTP Handler at /{service:[a-zA-Z0-9]+}
2021-01-28 15:25:26 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:8080
2021-01-28 15:25:26 [email protected]/service.go:200 level=info service=api Starting [service] go.micro.api
2021-01-28 15:25:26 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:8888
2021-01-28 15:25:26 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: go.micro.api-22d538ab-59d8-43a4-ad60-cbff35da4708
::1 - - [28/Jan/2021:15:25:28 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:25:29 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:25:30 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:25:31 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:25:31 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:25:32 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
错误：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 --server_name api-gateway api --address=0.0.0.0:9000 --namespace=go.micro.api --handler=http
2021-01-28 15:37:29 file=api/api.go:259 level=info service=api Registering API HTTP Handler at /{service:[a-zA-Z0-9]+}
2021-01-28 15:37:29 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:9000
2021-01-28 15:37:29 [email protected]/service.go:200 level=info service=api Starting [service] api-gateway
2021-01-28 15:37:29 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:50848
2021-01-28 15:37:29 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: api-gateway-8587a0ab-a3a9-4240-9b5d-5a982c339c4a
::1 - - [28/Jan/2021:15:37:30 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:37:32 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
错误：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 --server_name go.micro.api api --address=0.0.0.0:9000 --namespace=go.micro.api --type=qpi --handler=http
2021-01-28 15:39:40 file=api/api.go:259 level=info service=api Registering API HTTP Handler at /{service:[a-zA-Z0-9]+}
2021-01-28 15:39:40 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:9000
2021-01-28 15:39:40 [email protected]/service.go:200 level=info service=api Starting [service] go.micro.api
2021-01-28 15:39:40 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:51150
2021-01-28 15:39:40 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: go.micro.api-e593e92d-dc54-4204-b4d8-de2877efd68b
::1 - - [28/Jan/2021:15:39:44 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:39:45 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:39:45 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:39:46 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:39:46 +0800] "GET /greeter/greeter/call HTTP/1.1" 500 0 "" "PostmanRuntime/7.26.8"
2021-01-28 15:39:48 file=grpc/grpc.go:791 level=info service=api Deregistering node: go.micro.api-e593e92d-dc54-4204-b4d8-de2877efd68b
2021-01-28 15:39:48 file=grpc/grpc.go:959 level=info service=api Broker [http] Disconnected from 127.0.0.1:0
另一个可以正常跑起来的！！！
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --namespace=go.micro --type=service --address 0.0.0.0:8080
或：
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 --server_name go.micro.api api --address=0.0.0.0:9000 --namespace=go.micro --type=service
结果
D:\code\go\micro-greeter\micro>go run main.go --registry=etcd --registry_address=192.168.219.130:2379 api --namespace=go.micro --type=service --address 0.0.0.0:8080
2021-01-28 15:31:54 file=api/api.go:285 level=info service=api Registering API Default Handler at /
2021-01-28 15:31:54 file=http/http.go:90 level=info service=api HTTP API Listening on [::]:8080
2021-01-28 15:31:54 [email protected]/service.go:200 level=info service=api Starting [service] go.micro.api
2021-01-28 15:31:54 file=grpc/grpc.go:864 level=info service=api Server [grpc] Listening on [::]:50183
2021-01-28 15:31:54 file=grpc/grpc.go:697 level=info service=api Registry [etcd] Registering node: go.micro.api-8bd24488-b860-490c-a33c-2533b955c50c
::1 - - [28/Jan/2021:15:31:57 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:31:58 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:32:00 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:32:00 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"
::1 - - [28/Jan/2021:15:32:01 +0800] "GET /greeter/greeter/call HTTP/1.1" 200 16 "" "PostmanRuntime/7.26.8"