Traefik 作为入口控制器 + 服务器 GRPC - 未知：未收到状态

Question

我在 AKS 中使用 traefik 作为入口控制器，我有一个在本地运行正确的 grpc 服务，但我在 traefik 背后有一些问题。

当GRPC服务器return出错时，我正确接收，但是当它发送正常响应时，我没有收到：

grpcServer@grpc.test.com:443> client.Ping({}, metadata, pr)
EventEmitter {}
grpcServer@grpc.test.com:443> 
Error:  { Error: 2 UNKNOWN: No status received
    at Object.exports.createStatusError (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/common.js:91:15)
    at Object.onReceiveStatus (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:1204:28)
    at InterceptingListener._callNext (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:568:42)
    at InterceptingListener.onReceiveStatus (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:618:8)
    at callback (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:845:24) code: 2, metadata: {}, details: 'No status received' }

对

grpcServer@localhost:10000> client.Ping({}, metadata, pr)
EventEmitter {}
grpcServer@localhost:10000> 
{
  "response": "PONG"
}

错误：

grpcServer@grpc.test.com:443> client.Ping({}, pr)
EventEmitter {}
grpcServer@grpc.test.com:443> 
Error:  { Error: 16 UNAUTHENTICATED: incorrect serial number
    at Object.exports.createStatusError (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/common.js:91:15)
    at Object.onReceiveStatus (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:1204:28)
    at InterceptingListener._callNext (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:568:42)
    at InterceptingListener.onReceiveStatus (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:618:8)
    at callback (/usr/local/lib/node_modules/grpcc/node_modules/grpc/src/client_interceptors.js:845:24)
  code: 16,
  metadata:
   { 'content-length': '0', date: 'Wed, 06 Feb 2019 21:32:38 GMT' },
  details: 'incorrect serial number' }

k8s服务yml:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: velcloud-grpc
  namespace: production
  annotations:
    kubernetes.io/ingress.class: traefik
    ingress.kubernetes.io/protocol: h2c
    traefik.protocol: h2c
spec:
  rules:
    - host: grpc.test.com
      http:
        paths:
          - path: /
            backend:
              serviceName: velcloud-grpc
              servicePort: grpc

编辑：更多信息

经过一些调试，我检查了收到的响应：

{ client_close: true,
  metadata: { date: [ 'Wed, 06 Feb 2019 23:48:06 GMT' ] },
  read: <Buffer 0a 04 50 4f 4e 47>,
  status:
   { code: 2,
     details: 'No status received',
     metadata: Metadata { _internal_repr: {} } } } { code: 2,
  details: 'No status received'
}

这里唯一的问题是状态，反序列化后读取的内容正确响应：{ response: 'PONG' }

我不知道为什么状态设置为 2（未知）而不是 0（正常）。

Answer 1

在我的 Traefik 配置中，我使用了重试中间件（[retry]），Traefik v1.7.8 有一个错误：

When the retry middleware has already sent the headers, use the original headers map to be able to send trailers.

https://github.com/containous/traefik/pull/4442

我用这个修复程序手动构建了 v1.7 分支，一切又都正常了！非常感谢 Containous（Damien 和 Julien！）帮助调试这个问题！

Traefik 作为入口控制器 + 服务器 GRPC - 未知：未收到状态

Traefik as an ingress controller + Server GRPC - UNKNOWN: No status received

grpc

traefik

traefik-ingress