docker-node-hello's Introduction

Node.js Hello World

Node.js Hello World on CentOS using docker.

Prerequisites

Node.js & npm

Getting Started

Start Ubuntu virtual machine using Vagrant (required to run docker):
```
vagrant up
```
SSH into virtual machine:
```
vagrant ssh
```
Install dependencies:
```
cd /vagrant
make install
```

Build docker image:

make build
# docker build -t gasi/centos-node-hello .

Run app:

make run-container
# docker run -d gasi/centos-node-hello

Install curl:
```
sudo apt-get install curl
```

Get mapped port (last column) using, e.g. 49160:

docker ps

> # Example
> ID                  IMAGE                           COMMAND              CREATED             STATUS              PORTS
> ecce33b30ebf        gasi/centos-node-hello:latest   node /src/index.js   10 seconds ago      Up 9 seconds        49160->8080

Test app using the port in previous step, e.g. 49160:
```
curl localhost:<port>

# Example
# curl localhost:49163
```
It should print Hello World to the console.

Acknowledgements

Many thanks to @shykes and @unclejack for their support on IRC as well as the @dotCloud team for docker.

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docker-node-hello's Issues

centos or ubuntu setup?

The readme mentions that this setup is for centos but the vangrant file is for ubuntu.

Dockerfile needs update to avoid yum install failire for npm

The following line in the Dockerfile will install a specific version of npm from the epel repo (e,g., http://mirror.cogentco.com/pub/linux/epel/6/i386/)

RUN yum install -y npm-1.2.17-5.el6

The install will fail as the specified version no longer exists on the epel repo, replaced with newer versions of the package.

It is best to replace the above line in the Docker file with the following line:

RUN yum install -y npm

This will install the latest version of npm on the epel repo.

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