英文:
Docker compose problems (ECONNREFUSED)
问题
我有两个用于后端（.NET Core）和前端 Angular 的 Docker Compose 文件。它们应该相互通信。为此，我尝试了一个网络。但我总是收到以下消息：
[HPM] 尝试代理请求从 localhost:4200 到 http://localhost:5000 时发生错误 (ECONNREFUSED)
两个容器都在运行中。后端的 Compose 通过 Visual Studio 启动。前端的 Compose 通过 PowerShell 启动。
我尝试过前端使用端口 80 和 5000。结果都一样。
对于网络，我尝试过不使用外部网络。对于外部网络，我手动创建了名为 "test_network" 的网络。
后端 Docker Compose：
version: '3.7'
services:
backend_sql:
image: mcr.microsoft.com/mssql/server:2017-GA-ubuntu
container_name: testsql
networks:
- test_network
ports:
- "1440:1433"
volumes:
- testsqldata:/var/opt/mssql
backend_api:
image: ${DOCKER_REGISTRY-}backendapi
container_name: testapi
build:
context: .
dockerfile: backendAPI/Dockerfile
networks:
- test_network
depends_on:
- backend_sql
ports:
- "5000:80"
networks:
test_network:
external:
name: test_network
volumes:
testsqldata:
driver: local
name: testsqldata
前端 Docker Compose：
version: "3.7"
services:
testapp:
container_name: testapp
build: .
networks:
- test_network
ports:
- "4200:4200"
- "49153:49153"
volumes:
- "/app/node_modules"
- ".:/app"
networks:
test_network:
external:
name: test_network
前端 Dockerfile：
FROM node:10.16.3-alpine
WORKDIR /app
COPY package.json .
RUN npm install
COPY .
EXPOSE 4200 49153
CMD npm run start
package.json：
"scripts": {
"ng": "ng",
"start": "ng serve --host 0.0.0.0 --port 4200 --poll 500 --disableHostCheck",
"serve": "ng serve --proxy-config src/proxy.server.config.js"
}
proxy.server.config.js：
const PROXY_CONFIG = [
{
context: [
'/api',
],
target: 'http://localhost:5000',
secure: false,
logLevel: 'debug',
ws: true,
pathRewrite: {
"^/api": ""
}
}
];
module.exports = PROXY_CONFIG;
希望这些信息对你有帮助。如果需要进一步的帮助，请随时告诉我。
英文:
I have two docker-compose for the backend (.net Core) and for the Angular frontend. These should communicate with each other. For this I tried a network. But I always get the following message:
[HPM] Error occurred while trying to proxy request /appinfo from localhost:4200 to http://localhost:5000 (ECONNREFUSED)
Both containers are running. The backend-compose is started via Visual Studio. The frontend-compose is started using the powershell.
I have tried both port 80 and 5000 in the frontend. The result is the same.
For the network I tried it without external. For the external I created the network manually with "docker network create test_network".
backend docker-compose:
version: '3.7'
services:
backend_sql:
image: mcr.microsoft.com/mssql/server:2017-GA-ubuntu
container_name: testsql
networks:
- test_network
ports:
- "1440:1433"
volumes:
- testsqldata:/var/opt/mssql
backend_api:
image: ${DOCKER_REGISTRY-}backendapi
container_name: testapi
build:
context: .
dockerfile: backendAPI/Dockerfile
networks:
- test_network
depends_on:
- backend_sql
ports:
- "5000:80"
networks:
test_network:
external:
name: test_network
volumes:
testsqldata:
driver: local
name: testsqldata
frontend docker-compose:
version: "3.7"
services:
testapp:
container_name: testapp
build: .
networks:
- test_network
ports:
- "4200:4200"
- "49153:49153"
volumes:
- "/app/node_modules"
- ".:/app"
networks:
test_network:
external:
name: test_network
frontend dockerfile:
FROM node:10.16.3-alpine
WORKDIR /app
COPY package.json .
RUN npm install
COPY . .
EXPOSE 4200 49153
CMD npm run start
package.json:
"scripts": {
"ng": "ng",
"start": "ng serve --host 0.0.0.0 --port 4200 --poll 500 --disableHostCheck",
"serve": "ng serve --proxy-config src/proxy.server.config.js",
proxy.server.config.js:
const PROXY_CONFIG = [
{
context: [
'/api',
],
target: 'http://localhost:5000',
secure: false,
logLevel: 'debug',
ws: true,
pathRewrite: {
"^/api": ""
}
}
];
module.exports = PROXY_CONFIG;
答案1
得分: 1
> 现在，每个容器都可以查找主机名web或db，并返回相应容器的IP地址。例如，web的应用程序代码可以连接到URL postgres://db:5432 并开始使用Postgres数据库。
您应该使用容器名称作为主机名。
英文:
From the Docker Compose networking documentation,
> Each container can now look up the hostname web or db and get back the appropriate container’s IP address. For example, web’s application code could connect to the URL postgres://db:5432 and start using the Postgres database.
You should use the container names as hostname.
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