我试着调试了几个小时却没有效果。我要么知道怎么用谷歌搜索,要么就知道这是个不寻常的问题。
我在google云上有kubernetes引擎集群。为了测试它,我部署了简单的应用程序:
https://github.com/iniside/uSpark
它由三个控制台应用程序组成:
-
GreeterServer-带有GRPC和Google端点的前端
-
Greeter.后端-带有GRPC服务的后端。
-
uspark-客户端控制台应用程序。
它们都使用.NET Core 2.1、GRPC 1.12和C。Kubernetes引擎是1.10
我已经试过在集群内解析服务dns。
我还尝试在创建通道时直接通过它的IP调用服务。
其中任何一个结果是:
Grpc.Core.RpcException: 'Status(StatusCode=Unavailable, Detail="Name resolution failure")'
GreeterServer正在尝试与Greeter对话。后端:
public override Task<HelloReply> SayHelloAgain(HelloRequest request, ServerCallContext context)
{
Channel channel = new Channel("grpc-greeter-backend.default.svc.cluster.local", 9000, ChannelCredentials.Insecure);
var backendClient = new GreeterBackend.GreeterBackendClient(channel);
var reply = backendClient.SayHelloFromBackend(new BackendHelloRequest { Name = "iniside" });
channel.ShutdownAsync().Wait();
return Task.FromResult<HelloReply>(new HelloReply { Message = "Hello Again " + request.Name + " " + reply.Message });
}
这是我后台的代码:
class GreeterBackendImpl : GreeterBackend.GreeterBackendBase
{
public override Task<BackendHelloReply> SayHelloFromBackend(BackendHelloRequest request, ServerCallContext context)
{
return Task.FromResult<BackendHelloReply>(new BackendHelloReply { Message = "Hello " + request.Name + " From Backend"});
}
}
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Server server = new Server
{
Services = { GreeterBackend.BindService(new GreeterBackendImpl()) },
Ports = { new ServerPort("127.0.0.1", 9000, ServerCredentials.Insecure) }
};
server.Start();
Console.WriteLine("Gretter server is linstening on port 50051");
Console.WriteLine("Press any key to stop server");
int read = Console.Read();
while (read < 0)
{
}
}
}
前端配置:
apiVersion: v1
kind: Service
metadata:
name: esp-grpc-greeter
spec:
ports:
# Port that accepts gRPC and JSON/HTTP2 requests over HTTP.
- port: 80
targetPort: 9100
protocol: TCP
name: http2
selector:
app: esp-grpc-greeter
type: LoadBalancer
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: esp-grpc-greeter
spec:
replicas: 1
template:
metadata:
labels:
app: esp-grpc-greeter
spec:
containers:
- name: esp
image: gcr.io/endpoints-release/endpoints-runtime:1
args: [
"--http2_port=9100",
"--service=hellohorld3.endpoints.sa-game-206414.cloud.goog",
"--rollout_strategy=managed",
"--backend=grpc://127.0.0.1:9000"
]
ports:
- containerPort: 9100
- name: greeter
image: eu.gcr.io/sa-game-206414/greeter-service:v1
ports:
- containerPort: 8000
后端配置:
apiVersion: v1
kind: Service
metadata:
name: grpc-greeter-backend
spec:
ports:
- port: 8080
targetPort: 9000
protocol: TCP
name: http2
- port: 9000
targetPort: 9000
protocol: TCP
name: http2900
selector:
app: grpc-greeter-backend
type: ClusterIP
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: grpc-greeter-backend
spec:
replicas: 1
template:
metadata:
labels:
app: grpc-greeter-backend
spec:
containers:
- name: greeter-backend
image: eu.gcr.io/sa-game-206414/greeter-backend:b1
ports:
- containerPort: 9000