Hyper Fabric [fabric-sdk-go] 错误：CONNECTION_FAILED。说明：拨号连接超时

Question

当我尝试创建请求（提案）并使用 Execute 发送时，

    ctxCh := sdk.ChannelContext("mychannel", fabsdk.WithUser("user1"))
    chClient, err := channel.New(ctxCh)
    if err != nil {
        log.Fatalln("error from New channel", err)
    }

    req := channel.Request{
        ChaincodeID: "fabcar",
        Fcn:         "createCar",
        Args:        [][]byte{[]byte("CAR10"), []byte("Honda"), []byte("Accord"), []byte("Black"), []byte("Tom")},
    }
    resp, err := chClient.Execute(req)
    if err != nil {
        log.Fatalln("error from Execute =", err)
    }

我收到此错误：

调用 orderer 'orderer.example.com:7050' 失败：Orderer Client 状态码：(2) CONNECTION_FAILED。说明：拨号连接 超时 [orderer.example.com:7050]

我的 config.yaml

channels:
  # name of the channel
  mychannel:
    orderers:
      - orderer.example.com

orderers:
  orderer.example.com:
    url: grpc://localhost:7050

    # these are standard properties defined by the gRPC library
    # they will be passed in as-is to gRPC client constructor
    grpcOptions:
      ssl-target-name-override: orderer.example.com

    tlsCACerts:
      # Certificate location absolute path
      path: ./crypto-config/ordererOrganizations/example.com/tlsca/tlsca.example.com-cert.pem

我认为 Execute 函数试图与 orderer 服务 'orderer.example.com:7050' 连接，但找不到， 如果我是对的，那么我如何将 orderer.example.com:7050 更改为 grpc://localhost:7050

Answer 1

来自rocketchat， 解决这个问题添加到 config.yaml

entityMatchers:
 orderer:
   - pattern: (\w+).example.(\w+)
     urlSubstitutionExp: grpc://localhost:7050
     sslTargetOverrideUrlSubstitutionExp: orderer.example.com
     mappedHost: orderer.example.com

将grpc://localhost:7050 映射到orderer.example.com