docker-compose up无法正确运行应用程序

Question

我是Docker的新手。我有一个普通的堆栈应用程序，并且已经为前端和后端配置了dockerfile，如下所示。当我运行docker-compose up时，它似乎完成了，但是当我进入localhost时，我得到的是它，而不是我的平均堆栈应用程序。

我不确定为什么，但对此表示感谢。

后端Dockerfile

FROM node

MAINTAINER Phil

WORKDIR /src

COPY . /src

RUN npm install

RUN npm install -g nodemon

EXPOSE 3000

CMD ["npm", "start"]

前端Dockerfile

FROM nginx
MAINTAINER Phil


VOLUME /Users/Phil/Documents/myapp/myapp-docker/frontend/dist:usr/share/nginx/html

EXPOSE 80

docker-compose.yml

version: '3'
services:
    web:
        build: ./frontend
        ports:
            - "80:80"
        links:
        - node
        volumes:
        - "/Users/Phil/Documents/myapp/myapp-docker/frontend/dist:/usr/share/nginx/html"
    node:
        build: ./backend
        ports:
        - "3000:3000"

控制台输出：

Building node
Gracefully stopping... (press Ctrl+C again to force)
Stopping myapp-docker_web_1 ... done

C:\Users\Phil\Documents\myapp\myapp-docker>docker-compose up --build
Building node
Step 1/8 : FROM node
 ---> 2f1ff44a8bb5
Step 2/8 : MAINTAINER Phil
 ---> Using cache
 ---> 78d7fb0bb77a
Step 3/8 : WORKDIR /src
 ---> Using cache
 ---> 70e753257f23
Step 4/8 : COPY . /src
 ---> Using cache
 ---> 2903a77a03ef
Step 5/8 : RUN npm install
 ---> Using cache
 ---> 582d4f3b0a7b
Step 6/8 : RUN npm install -g nodemon
 ---> Using cache
 ---> 1c9d67ce2743
Step 7/8 : EXPOSE 3000
 ---> Using cache
 ---> 0d77a648b020
Step 8/8 : CMD ["npm", "start"]
 ---> Using cache
 ---> 9adfbe7156f2
Successfully built 9adfbe7156f2
Successfully tagged myapp-docker_node:latest
Building web
Step 1/4 : FROM nginx
 ---> 2073e0bcb60e
Step 2/4 : MAINTAINER Phil
 ---> Using cache
 ---> 1fba608ad1fa
Step 3/4 : VOLUME /Users/Phil/Documents/myapp/myapp-docker/frontend/dist:usr/share/nginx/html
 ---> Running in 122358e91315
Removing intermediate container 122358e91315
 ---> 2a54fcb0a4e6
Step 4/4 : EXPOSE 80
 ---> Running in 95117506887d
Removing intermediate container 95117506887d
 ---> 36a7c7bac5b8
Successfully built 36a7c7bac5b8
Successfully tagged myapp-docker_web:latest
Recreating myapp-docker_node_1 ... done
Recreating myapp-docker_web_1  ... done
Attaching to myapp-docker_node_1, myapp-docker_web_1
node_1  |
node_1  | > backend@1.0.0 start /src
node_1  | > node ./package.json
node_1  |
myapp-docker_node_1 exited with code 0
web_1   | 2020/02/06 20:09:02 [error] 6#6: *1 open() "/usr/share/nginx/html/favicon.ico" failed (2: No such file or directory), client: 172.18.0.1, server: localhost, request: "GET /favicon.ico HTTP/1.1",
host: "localhost"
web_1   | 172.18.0.1 - - [06/Feb/2020:20:09:02 +0000] "GET /favicon.ico HTTP/1.1" 404 153 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0" "-"
Gracefully stopping... (press Ctrl+C again to force)
Stopping myapp-docker_web_1    ... done

后端package.json

{
  "name": "backend",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node ./package.json"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "aws-sdk": "^2.612.0",
    "bcrypt": "^3.0.8",
    "body-parser": "^1.19.0",
    "create-hash": "^1.2.0",
    "crypto": "^1.0.1",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^5.8.11",
    "mongoose-unique-validator": "^2.0.3",
    "multer": "^1.4.2",
    "multer-s3": "^2.9.0"
  }
}

在相关情况下，这是我的目录布局

Answer 1

看起来您实际上并不需要Dockerfile作为前端。您肯定必须删除VOLUME声明，但是我建议删除整个文件，并直接在docker-compose.yml中使用“ image：nginx”。

由于您没有在构建前端应用程序，因此需要在运行docker-compose up之前确保frontend / dist中具有index.html。

您的后端应用程序也无法启动，因为它看起来像试图运行node ./package.json。在start中检查package.json任务的定义。

进行这些更改后，您可以尝试重新运行docker-compose：

version: '3'
services:
    web:
        image: nginx
        ports:
            - "80:80"
        volumes:
        - "/Users/Phil/Documents/myapp/myapp-docker/frontend/dist:/usr/share/nginx/html"
    node:
        build: ./backend
        ports:
        - "3000:3000"

Answer 2

您指向的文件夹错误。 您的index.html位于/ dist / my-app中，就像我从您在此处发布的照片​​看到的那样： https://postimg.cc/MntD9mFM。

修改您的Dockerfile和docker-compose以指向正确的文件夹。

内部版本1

Dockerfile

FROM nginx
MAINTAINER Phil
#optional
RUN rm -rf /usr/share/nginx/html/*

VOLUME /Users/Phil/Documents/myapp/myapp-docker/frontend/dist/my-app:usr/share/nginx/html

EXPOSE 80

docker-compose：

version: '3'
services:
    web:
        build: ./frontend
        ports:
            - "80:80"
        links:
        - node
        volumes:
        - "/Users/Phil/Documents/myapp/myapp-docker/frontend/dist/my-app:/usr/share/nginx/html"
    node:
        build: ./backend
        ports:
        - "3000:3000"

Build 2（更好）

您也可以忽略Dockerfile，因为docker-compose点已经指向您的卷，因此您的新docker-compose如下所示：

version: '3'
services:
    web:
        image: nginx
        ports:
            - "80:80"
        links:
        - node
        volumes:
        - "/Users/Phil/Documents/myapp/myapp-docker/frontend/dist/my-app:/usr/share/nginx/html"
    node:
        build: ./backend
        ports:
        - "3000:3000"