如何使用Docker使用单个mongodb运行多个应用程序 [英] How to run multiple applications with single mongodb using docker

问题描述

我希望能够在两个容器中运行两个单独的应用程序-每个独立应用程序一个.然后，两个应用程序都应该能够与将容纳MongoDB的第三个容器进行通信.

I want to be able to run two separate apps in two containers - one for each independent app. Then both apps should be able to communicate with the 3rd container which will hold MongoDB.

1. 本地计算机上的文件夹结构

1. Folder structure on my local machine

/Users/me/Dev: Dockerfile, docker-compose.yml 
/Users/me/Dev/App1: with source code and package.json for app1
/Users/me/Dev/App2: with source code and package.json for app2
/Users/me/Dev/data/db: I wanna keep datafile for Mongo

dockerfile-但老实说，我对两个应用程序都重复两次也不太合适. (这是我第一次使用docker，因此还不熟悉如何为我的场景准备Dockerfile)

dockerfile - but honestly it does not look right too me to repeat twice for both apps. (Its a first time I am using docker so am not yet familiar with how to best prepare the Dockerfile for my scenario)

FROM node:8.9.1
WORKDIR ./app1/
COPY ./package.json ./app1/
RUN npm install
CMD npm start
COPY ./app1/ ./app1/
EXPOSE 8081
#
FROM node:8.9.1
WORKDIR ./app2/
COPY ./package.json ./app2/
RUN npm install
CMD npm start
COPY ./app2/ ./app2/
EXPOSE 8082

docker-compose.yml

docker-compose.yml

version: '2'

services:
app1:
build: .
volumes:
  - .:/app1
ports:
  - "8082:8082"
links:
  - mongo
depends_on:
  - mongo

# app2:
#   build: .
#   volumes:
#     - .:./app2
#   ports:
#     - "8081:8081"
#   links:
#     - mongo
#   depends_on:
#     - mongo

mongo:
image: mongo:3.4.10
volumes:
    - './dev/data/db:/data/db'
ports:
    - "27017:27017"

几个问题: 例如，在docker-compose构建上，我得到-错误:服务'app1'无法构建:COPY失败:stat/var/lib/docker/tmp/docker-builder287108072/package.json:无此类文件或目录

Few issues: On docker-compose build for example I got - ERROR: Service 'app1' failed to build: COPY failed: stat /var/lib/docker/tmp/docker-builder287108072/package.json: no such file or directory

即使我尝试了多种方法在Dockerfile中提供路径并进行d-compose，我仍然不确定这是否行得通.

Even if I tried multiple ways of providing the path in Dockerfile and d-compose I still am not convinced this is gonna work.

因此，我需要一些有关如何在我的主DEV文件夹中准备Dockerfile和docker compose的指导(如上所述)，以便docker将在同一个docker网络上启动全部与之通信的3个容器(app1，app2，mongo)彼此.

So I need some guidance on how to prepare Dockerfile and docker compose in my main DEV folder (as described above) so that docker will start up 3 containers (app1, app2, mongo) all on the same docker network to communicate with each other.

推荐答案

方法#1只需更正Dockerfile

首先需要使用文件夹路径替换路径

Approach#1 Just correct your Dockerfile

Path need to be replaced with the folder path first

用

COPY ./App1/package.json ./app1/

COPY ./App1/package.json ./app1/

COPY ./App2/package.json ./app2/

COPY ./App2/package.json ./app2/

但这看起来是错误的做法.遵循以下步骤创建docker映像并使用docker-compose.yml进行部署，就像mongo image一样，您必须创建自己的映像并使用compose运行它们.

But this look wrong practice. Folow bellow steps to create the docker images and deploy them with the docker-compose.yml just like mongo image you have to create your own image and run them with compose.

1. 转到您的App1文件夹并创建一个Dockerfile

1. Goto your App1 folder and create a Dockerfile

Dockerfile

FROM node:8.9.1
WORKDIR ./app1/
COPY ./package.json ./app1/
RUN npm install
CMD npm start
COPY ./app1/ ./app1/
EXPOSE 8081

使用

Create docker images with

docker build -t app1Image

docker build -t app1Image .

App2 Docker映像

1. 转到您的App2文件夹并创建一个Dockerfile

1. Goto your App2 folder and create a Dockerfile

Dockerfile

FROM node:8.9.1
WORKDIR ./app2/
COPY ./package.json ./app2/
RUN npm install
CMD npm start
COPY ./app2/ ./app2/
EXPOSE 8081

使用

Create docker images with

docker build -t app1Image

docker build -t app1Image .

使用compose部署映像

1. 在Dev文件夹中创建docker-compose.yml

1. Create docker-compose.yml in Dev folder

docker-compose.yml

version: '2'
services:
   app1:
     image: app1Image
     ports:
       - 8082:8082
     links:
       - mongo
     depends_on:
       - mongo
   app2:
     image: app2Image
     ports:
       - 8081:8081
     links:
       - mongo
     depends_on:
       - mongo
   mongo:
     image: mongo:3.4.10
     ports:
       - 27017:27017
     volumes:
       - './dev/data/db:/data/db'
     links:
       - mongo
     depends_on:
       - mongo

使用docker-compose运行应用

RUN App with docker-compose

docker-compose up -d

docker-compose up -d

这篇关于如何使用Docker使用单个mongodb运行多个应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！