从同一节点项目运行2个不同的容器

Posted 2023-02-17

我有一个节点项目，在根目录上有一个Web服务器和一个服务。

--myNodeProj
  --app.js //the web server
  --service.js //an update service

在我的package.json中，我有以下内容：

"scripts": 
    "start": "node app.js",
    "service": "node service.js"
  ,

对于我的DockerFile，我有：

FROM node:8

# Create app directory
WORKDIR /usr/src/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

RUN npm install
# If you are building your code for production
# RUN npm install --only=production

# Bundle app source
COPY . .

EXPOSE 8080
CMD [ "npm", "start" ]

CMD将运行app.js（webserver）。如何使用该服务构建另一个容器？我是否创建了另一个Dockerfile？ docker build命令看起来会不同吗？

答案

您可以覆盖命令 - docker run <image> node service.js

https://docs.docker.com/engine/reference/run/#general-form

另一答案

我最终使用docker-compose。您需要使用以下代码创建docker-compose.yml文件：

version: '3'
services:
  web:
    # will build ./docker/web/Dockerfile
    build:
      context: .
      dockerfile: ./docker/web/Dockerfile
    ports:
      - "3000:3000"
    env_file:
      - web.env
  service:
    # will build ./docker/service/Dockerfile
    build:
      context: .
      dockerfile: ./docker/service/Dockerfile
    env_file:
      - service.env

这个文件引用了构建容器的2个Dockerfiles：

为了服务

FROM node:8

# Create app directory
WORKDIR /usr/src/service

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

RUN npm install
# If you are building your code for production
# RUN npm install --only=production

# Bundle app source
COPY . .

CMD [ "node", "service.js" ]

对于网络：

FROM node:8

# Create app directory
WORKDIR /usr/src/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

RUN npm install
# If you are building your code for production
# RUN npm install --only=production

# Bundle app source
COPY . .

#EXPOSE 8080
CMD [ "npm", "start" ]

请注意，我只能进行一次NPM启动。我直接使用node调用服务。

当我想构建容器时，我发出命令：

docker-compose build