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社区首页 >问答首页 >nestjs grpc客户端无法将dns解析为docker容器中的grpc服务。

问nestjs grpc客户端无法将dns解析为docker容器中的grpc服务。
EN

Stack Overflow用户
提问于 2022-09-18 11:32:12
回答 1查看 240关注 0票数 0

我有一个grpc服务和一个简单的http服务器作为grpc客户端。他们在当地跑步时工作很好。但是，一旦放入单独的码头容器中，它们就无法建立连接。grpc服务运行并公开端口:5001。

在nestjs grpc客户机应用程序中注册grpc服务

代码语言：javascript
运行
复制
  ClientsModule.register([
      {
        name: "TOKEN_NAME",
        transport: Transport.GRPC,
        options: {
           ...GRPC_OPTIONS,
           url: process.env.GRPC_SERVICE_URL
        },
      },
    ]),

我尝试使用容器名称作为URL：

代码语言：javascript
运行
复制
version: '3.9'
services:
  grpc-service:
    restart: always
    build: ./grpc-service
    container_name: grpc-service
  grpc-client:
    restart: always
    build: ./backend
    container_name: grpc-client
#    links:
#      - "grpc-service:service"
    depends_on:
      - grpc-service
    ports:
      - "3000:3000"
    environment:
      - GRPC_SERVICE_URL=http://grpc-service:5001
#     - GRPC_SERVICE_URL=http://service:5001

并尝试创建网络并分配IP地址：

代码语言：javascript
运行
复制
version: '3.9'
networks:
  mynetwork:
    driver: bridge
    ipam:
      config:
        - subnet: 179.20.0.0/24

services:
  grpc-service:
    restart: always
    build: ./grpc-service
    container_name: grpc-service
    networks:
      mynetwork:
        ipv4_address: 179.20.0.5
  grpc-client:
    restart: always
    build: ./backend
    container_name: grpc-client
    networks:
      mynetwork:
        ipv4_address: 179.20.0.6

    depends_on:
      - grpc-service
    ports:
      - "3000:3000"
    environment:
      - GRPC_SERVICE_URL=179.20.0.5:5001

错误：

使用http://grpc-service:5001

代码语言：javascript
运行
复制
grpc-client       | [Nest] 1  - 09/20/2022, 12:20:14 PM   ERROR [ExceptionsHandler] 14 UNAVAILABLE: Name resolution failed for target dns:http://grpc-service:5001
grpc-client       | Error: 14 UNAVAILABLE: Name resolution failed for target dns:http://grpc-service:5001
grpc-client       |     at Object.callErrorFromStatus (/node_modules/@grpc/grpc-js/build/src/call.js:31:19)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client.js:190:52)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:365:141)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:328:181)
grpc-client       |     at /node_modules/@grpc/grpc-js/build/src/call-stream.js:188:78
grpc-client       |     at processTicksAndRejections (node:internal/process/task_queues:78:11)
grpc-client       | for call at
grpc-client       |     at ServiceClientImpl.makeUnaryRequest (/node_modules/@grpc/grpc-js/build/src/client.js:160:30)
grpc-client       |     at ServiceClientImpl.<anonymous> (/node_modules/@grpc/grpc-js/build/src/make-client.js:105:19)
grpc-client       |     at Observable._subscribe (/node_modules/@nestjs/microservices/client/client-grpc.js:177:35)
grpc-client       |     at Observable._trySubscribe (/node_modules/rxjs/dist/cjs/internal/Observable.js:41:25)
grpc-client       |     at /node_modules/rxjs/dist/cjs/internal/Observable.js:35:31
grpc-client       |     at Object.errorContext (/node_modules/rxjs/dist/cjs/internal/util/errorContext.js:22:9)
grpc-client       |     at Observable.subscribe (/node_modules/rxjs/dist/cjs/internal/Observable.js:26:24)
grpc-client       |     at /node_modules/rxjs/dist/cjs/internal/lastValueFrom.js:10:16
grpc-client       |     at new Promise (<anonymous>)
grpc-client       |     at lastValueFrom (/node_modules/rxjs/dist/cjs/internal/lastValueFrom.js:7:12)

使用179.20.0.5:5001

代码语言：javascript
运行
复制
grpc-client       | [Nest] 1  - 09/20/2022, 12:22:14 PM   ERROR [ExceptionsHandler] 14 UNAVAILABLE: No connection established
grpc-client       | Error: 14 UNAVAILABLE: No connection established
grpc-client       |     at Object.callErrorFromStatus (/node_modules/@grpc/grpc-js/build/src/call.js:31:19)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client.js:190:52)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:365:141)
grpc-client       |     at Object.onReceiveStatus (/node_modules/@grpc/grpc-js/build/src/client-interceptors.js:328:181)
grpc-client       |     at /node_modules/@grpc/grpc-js/build/src/call-stream.js:188:78
grpc-client       |     at processTicksAndRejections (node:internal/process/task_queues:78:11)
grpc-client       | for call at
grpc-client       |     at ServiceClientImpl.makeUnaryRequest (/node_modules/@grpc/grpc-js/build/src/client.js:160:30)
grpc-client       |     at ServiceClientImpl.<anonymous> (/node_modules/@grpc/grpc-js/build/src/make-client.js:105:19)
grpc-client       |     at Observable._subscribe (/node_modules/@nestjs/microservices/client/client-grpc.js:177:35)
grpc-client       |     at Observable._trySubscribe (/node_modules/rxjs/dist/cjs/internal/Observable.js:41:25)
grpc-client       |     at /node_modules/rxjs/dist/cjs/internal/Observable.js:35:31
grpc-client       |     at Object.errorContext (/node_modules/rxjs/dist/cjs/internal/util/errorContext.js:22:9)
grpc-client       |     at Observable.subscribe (/node_modules/rxjs/dist/cjs/internal/Observable.js:26:24)
grpc-client       |     at /node_modules/rxjs/dist/cjs/internal/lastValueFrom.js:10:16
grpc-client       |     at new Promise (<anonymous>)
grpc-client       |     at lastValueFrom (/node_modules/rxjs/dist/cjs/internal/lastValueFrom.js:7:12)

编辑

我还尝试使用端口映射运行grpc服务，在本地运行5001:5001，尝试在localhost:5001上连接grpc服务。在这种情况下，我得到了connection dropped error

代码语言：javascript
运行
复制
  [Nest] 93680  - 09/24/2022, 2:52:50 PM   ERROR [ExceptionsHandler] 14 UNAVAILABLE: Connection dropped
Error: 14 UNAVAILABLE: Connection dropped
         at Object.callErrorFromStatus (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/call.ts:81:17)
         at Object.onReceiveStatus (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/client.ts:352:36)
         at Object.onReceiveStatus (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/client-interceptors.ts:462:34)
         at Object.onReceiveStatus (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/client-interceptors.ts:424:48)
         at /Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/call-stream.ts:330:24
         at processTicksAndRejections (node:internal/process/task_queues:78:11)
  for call at
  at ServiceClientImpl.makeUnaryRequest (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/client.ts:324:26)
  at ServiceClientImpl.<anonymous> (/Users/grpc-docker/backend/node_modules/@grpc/grpc-js/src/make-client.ts:189:15)
  at Observable._subscribe (/Users/grpc-docker/backend/node_modules/@nestjs/microservices/client/client-grpc.js:177:35)
  at Observable._trySubscribe (/Users/grpc-docker/backend/node_modules/rxjs/src/internal/Observable.ts:245:19)
  at /Users/grpc-docker/backend/node_modules/rxjs/src/internal/Observable.ts:235:18
  at Object.errorContext (/Users/grpc-docker/backend/node_modules/rxjs/src/internal/util/errorContext.ts:29:5)
  at Observable.subscribe (/Users/grpc-docker/backend/node_modules/rxjs/src/internal/Observable.ts:221:5)
  at /Users/grpc-docker/backend/node_modules/rxjs/src/internal/lastValueFrom.ts:59:12
  at new Promise (<anonymous>)
  at lastValueFrom (/Users/grpc-docker/backend/node_modules/rxjs/src/internal/lastValueFrom.ts:56:10)
typescript
docker
nestjs
grpc
grpc-node
EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2022-09-27 10:57:50

基本上，问题在于grpc服务是如何启动的。

Nestjs的createMicroservice方法接受grpc选项，其中一个是url。但是，我的设置为localhost:5001，显然不能从容器外部访问它。在将其更改为0.0.0.0:5001之后，就没有建立连接的问题了。在弄清楚这一点之后，我找到了一个更详细的解释它的堆栈交换线程。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/73762401

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