Dockerfile nodejs容器搭建

文章目录

一、Dockerfile编写

FROM node:12-alpine

# 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 ci --only=production

# Bundle app source
COPY . .

Volume /root/nodejsdocker_alpine/

EXPOSE 8081
CMD [ "node", "server.js" ]

二、nodejs服务器

server.js

const express = require('express');

// Constants
const PORT = 8081;
const HOST = '0.0.0.0';

// App
const app = express();
app.get('/api', (req, res) => {
  res.send('Hello World');
});
app.get('/api/test', (req, res) => {
  res.send('Hello World api/test');
});
app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);

三、新建文件

package.json

{
  "name": "docker_web_app",
  "version": "1.0.0",
  "description": "Node.js on Docker",
  "author": "First Last <first.last@example.com>",
  "main": "server.js",
  "scripts": {
    "start": "node server.js"
  },
  "dependencies": {
    "express": "^4.16.1"
  }
}

.dockerignore

这将避免你的本地模块以及调试日志被拷贝进入到你的 Docker 镜像中,以至于把你镜像原有安装的模块给覆盖了。

node_modules
npm-debug.log

四、构建镜像

开关符 -t 让你标记你的镜像,以至于让你以后很容易地用 docker images 找到它。

docker build -t nodejs_alpine .

构建完成:

[root@iZ2ze5ot8cnsficuqqnoj5Z ~]# docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
nodejs_alpine               latest              b56a8ee0393f        46 seconds ago      92.2MB

运行:

[root@iZ2ze5ot8cnsficuqqnoj5Z ~]# docker run -it --name nodejs -p 8081:8081 b56a8ee0393f
Running on http://0.0.0.0:8081

在宿主机*问:

[root@iZ2ze5ot8cnsficuqqnoj5Z ~]# curl localhost:8081/api
Hello World

进入容器内部:

[root@iZ2ze5ot8cnsficuqqnoj5Z ~]# docker exec -it eb1865104671 sh

进步ing

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