1.新建目录src，并进入src目录
[xiejdm@localhost Documents]$ mkdir src
[xiejdm@localhost Documents]$ cd src/
2.创建package.json和index.js文件，文件内容如下：
package.json
[xiejdm@localhost Documents]$ mkdir src
[xiejdm@localhost Documents]$ cd src/
[xiejdm@localhost src]$ cat package.json
{
"name": "docker-centos-hello",
"private": true,
"version": "0.0.1",
"description": "Node.js Hello world app on CentOS using docker",
"author": "Gideon xie <xiejdml@gmail.com>",
"dependencies": {
"express": "3.2.4"
}
}
index.js
[xiejdm@localhost src]$ cat index.js
var express = require('express');
// Constants
var PORT = 8080;
// App
var app = express();
app.get('/', function (req, res) {
res.send('Hello world\n');
});
app.listen(PORT);
3.创建Dockfile
[xiejdm@localhost src]$ cat Dockerfile
FROM centos:centos7
# Enable EPEL for Node.js
RUN yum install -y epel-release
# Install Node.js and npm
RUN yum install -y npm
# Bundle app source
COPY . /src
# Install app dependencies
RUN cd /src; npm install
EXPOSE 8080
CMD ["node", "/src/index.js"]
[xiejdm@localhost src]$
4.使用docker build构建生成镜像
[xiejdm@localhost src]$ docker build -t gideon/centos-node-hello .
Sending build context to Docker daemon 4.096 kB
Sending build context to Docker daemon
Step 0 : FROM centos:centos7
---> 7322fbe74aa5
Step 1 : RUN yum install -y epel-release
---> Running in 858c0e3e9a22
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.yun-idc.com
* extras: mirrors.yun-idc.com
* updates: mirrors.nwsuaf.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package epel-release.noarch 0:7-5 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
Package Arch Version Repository Size
Installing:
epel-release noarch 7-5 extras 14 k
Transaction Summary
Install 1 Package
Total download size: 14 k
······
······
······
npm http 200 https://registry.npmjs.org/qs/-/qs-0.6.4.tgz
npm WARN engine formidable@1.0.13: wanted: {"node":"<0.9.0"} (current: {"node":"v0.10.36","npm":"1.3.6"})
express@3.2.4 node_modules/express
├── methods@0.0.1
├── fresh@0.1.0
├── range-parser@0.0.4
├── cookie-signature@1.0.1
├── buffer-crc32@0.2.1
├── cookie@0.0.5
├── commander@0.6.1
├── mkdirp@0.3.4
├── send@0.1.0 (mime@1.2.6)
├── debug@2.2.0 (ms@0.7.1)
└── connect@2.7.9 (pause@0.0.1, qs@0.6.4, bytes@0.2.0, formidable@1.0.13)
---> 66738118fe5d
Removing intermediate container cad428ec3167
Step 5 : EXPOSE 8080
---> Running in 9ee7937e5835
---> f6ccd16494ac
Removing intermediate container 9ee7937e5835
Step 6 : CMD node /src/index.js
---> Running in 9ca19e7392e9
---> ae5f980eea52
Removing intermediate container 9ca19e7392e9
Successfully built ae5f980eea52
[xiejdm@localhost src]$
5.查看我的镜像
[xiejdm@localhost src]$ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
gideon/centos-node-hello latest ae5f980eea52 About a minute ago 408 MB
nodejs_hello/node latest 2daac5743daa 52 minutes ago 544.7 MB
gideon/nodejs latest f30730d7c260 3 days ago 544.7 MB
nginx latest 6886fb5a9b8d 6 days ago 132.8 MB
ubuntu latest d2a0ecffe6fa 2 weeks ago 188.3 MB
centos centos7 7322fbe74aa5 5 weeks ago 172.2 MB
centos latest 7322fbe74aa5 5 weeks ago 172.2 MB
hello-world latest 91c95931e552 3 months ago 910 B
[xiejdm@localhost src]$
6.运行刚刚生成的镜像，并将容器的8080端口映射到主机的49161端口
[xiejdm@localhost src]$ docker run -p 49161:8080 -d gideon/centos-node-hello
71baf591eb27a2373daf5a802ee9406e635878ee1b1fcd047eb3f39e476b4406
[xiejdm@localhost src]$
7.在本机输入localhost:49161，访问helloword应用。
备注：CentOS 7中增加EPEL库，直接使用yum install epel-release即可（CentOS 5/6则需要下载对应的rpm包然后进行安装）。