/bin/sh: sequelize: 当我尝试使用 docker-compose 运行 express.js 应用程序时找不到

Question

我在用户服务目录的 Dockerfile 中有这个。

FROM node:15-alpine

COPY . /app

WORKDIR /app

RUN echo ">>>> $PWD"

RUN ls -lart

RUN yarn install

RUN ls -lart /app/node_modules/.bin

CMD yarn watch

当前目录是/app，正如预期的那样。 Sequelize 二进制文件位于node_modules/.bin 文件夹中。 /app/node_modules/.bin 命令的结果是...

total 16
lrwxrwxrwx    1 root     root            21 Apr  9 18:35 uuid -> ../uuid/dist/bin/uuid
lrwxrwxrwx    1 root     root            30 Apr  9 18:35 sequelize-cli -> ../sequelize-cli/lib/sequelize
lrwxrwxrwx    1 root     root            30 Apr  9 18:35 sequelize -> ../sequelize-cli/lib/sequelize

这是docker-compose.yml：

....

services:
  users-service:
    build: './users-service'
    depends_on:
      - users-service-db
    environment:
      - DB_URI=mysql://root:**********@users-service-db/users_db?charset=UTF8
    ports:
      - 7100:7100
    volumes:
      - ./users-service:/app
    networks:
      - autostop

  users-service-db:
    command: --default-authentication-plugin=mysql_native_password
    environment:
      - MYSQL_ROOT_PASSWORD=password
      - MYSQL_DATABASE=users_db
    restart: always  
    image: mysql:5.7.20
    ports:
      - 0.0.0.0:3306:3306
    networks:
      - autostop

...

当我运行 docker-compose build 或 docker-compose up --build 时，它会显示

$ yarn db:migrate && babel-watch -L src/index.js
users-service_1     | $ sequelize db:migrate
users-service_1     | /bin/sh: sequelize: not found

Answer 1

问题在于，当您映射卷时，即使是 node_modules 也会被主机文件夹覆盖。如果主机源代码中没有node_modules，它将无法工作。所以你想要的是屏蔽容器的node_modules 文件夹，这样它就不会受到主机文件夹映射的影响

....

services:
  users-service:
    build: './users-service'
    depends_on:
      - users-service-db
    environment:
      - DB_URI=mysql://root:**********@users-service-db/users_db?charset=UTF8
    ports:
      - 7100:7100
    volumes:
      - ./users-service:/app
      - node_modules:/app/node_modules
    networks:
      - autostop

  users-service-db:
    command: --default-authentication-plugin=mysql_native_password
    environment:
      - MYSQL_ROOT_PASSWORD=password
      - MYSQL_DATABASE=users_db
    restart: always  
    image: mysql:5.7.20
    ports:
      - 0.0.0.0:3306:3306
    networks:
      - autostop
volumes:
  node_modules:
...

通过将其映射到命名卷，将确保内部文件夹不受外部主机映射文件夹的影响