docker compose 环境变量在 nodejs 容器中未定义

docker compose environment varibales are undefined in nodejs container

尝试控制台记录 docker 中定义的环境变量时 - 将节点容器 returns 的值设为未定义。

docker-compose.yml

version: "3"

services: 

    api: 
        build: ./api
        ports: 
            - "3004:3004"
        volumes:
            - type: bind
              source: ./api
              target: /usr/src/api
        working_dir: /usr/src/api
        environment: 
            REDIS_HOST: "redis://redis:6379"
            TEST: "123"
        depends_on: 
            - redis
        networks:
            - backend

    redis: 
        image: "redis:latest"
        ports: 
            - "6379:6379"
        networks:
            - backend
networks:
    backend:
        driver: bridge

我试过更改 yaml 语法 到 - TEST="123" 而不是键值语法只是为了确保。我不确定是什么问题。

API docker文件如下所示:

FROM node:12


# create destination directory
RUN mkdir -p /usr/src/api
WORKDIR /usr/src/api

# copy the app, note .dockerignore
COPY . /usr/src/api

# Install packages
RUN npm i yarn --save
RUN yarn 

# COPY . /src
EXPOSE 3005

CMD ["yarn", "dev"]

NodeJS 代码段:

console.log("redis host! + test");
console.log(process.env.REDIS_HOST, process.env.TEST)

控制台日志输出:

api_1    | redis host! + test
api_1    | undefined undefined

您需要使用 ARG

Dockerfile 中额外引用环境变量
ARG REDIS_HOST
ARG TEST