node.docker

cusspvz/node docker image

🌐Super small Node.js container (~20MB) based on Alpine Linux OS

Usage

Use node you want right away

What if you could develop using containers? Here's a brief example of things you could do:

# Launch `index.js` using node 0.12.7 
node.docker 0.12.7 ./index.js
 
# Guess what, you don't even need to have node installed. 

Learn more about Launcher

Using as your project's base image

This image supports sugar onbuild, meaning that your Dockerfile could be super hyper simple (as one-line), unless you need to install things into linux system. Suff related directly with npm and your app, should stay at package.json.

Brief onbuild example

package.json

{
    "name": "my-awesome-app",
    "version": "1.0.3",
    "scripts": {
        "build": "echo \"console.log( window )\" > build/index.js",
        "start": "node serve.js /build"
    }
}

Dockerfile

FROM cusspvz/node:0.12.7-onbuild

docker build -t my-awesome-app:1.0.3 . will build a production-ready image by installing all needed dependencies and linking things together.

How does onbuild works?

Under the hood, it executes the following commands:

• ENV NODE_ENV=production - This sets NODE_ENV as production so you can pull already the generated image into your servers! :)
• ADD . / - This will copy all files and folders present on Dockerfile directory into docker image. If you want this to ignore some files, just create .dockerignore and place there ignore rules.
• npm install --production - Installs only production needed packages dependencies. If you need some of the development packages, use next command to install them. Please be sure you left your image clean and small.
• npm run build - You should ALWAYS have a build script. Most of us will need this to set up our building process, if you don't, just set it up as an echo none. In case you don't know what to put here, for us, this is useful for building front-end components at our projects.
• CMD [ "start" ] - I've put here an entrypoint that has the following behaviors:
  • - If nothing is supplied, it will just exec node
  • start (Default) - proxies npm start so your app could run
  • shell - proxies to /bin/sh

What if i need to install stuff on my container?

Where are two ways of doing this. If packages aren't direct dependencies to your app, you could continue to use onbuild version. Otherwise, if you onbuild is failing because npm install declares the needs of some dependencies, you will have to use regular version.

onbuild way:

FROM cusspvz/node:0.12.7-onbuild
RUN apk --update add package-a package-b && \
    rm -fR /var/cache/apk/*;

regular way:

FROM cusspvz/node:0.12.7
RUN apk --update add package-a package-b && \
    rm -fR /var/cache/apk/*;
 
ENV NODE_ENV=production
ADD . /app
 
RUN npm install --production
RUN npm run build
 
CMD [ "start" ]

Wait, what the f*ck is apk?

apk is the package manager for Alpine Linux which this image is based.

Its similar to:

• apt-get on .deb based distros (Debian, Ubuntu, etc)
• yum on .rpm based distros (CentOS, Fedora, etc)
• npm on... ok, not quite but you got the idea.

And how do I know packages names?

Alpine Linux, like many other distros, keeps a page with all info and links for each package.

Seems nice!! I'm gona use it on my next project!

Cool!! Rate and tweet GitHub repo so others can know about this.

What if I want to access and execute some shitty shell things?

docker run --rm -ti cusspvz/node:0.12.7 shell

Versions

I'm building images on my computer, as so, versions won't be available since I have to check/build one by one.

Created make VERSION=xxx gen-version to create/update Dockerfile's for each version so I can use Docker Hub builder instead. That doesn't mean that all versions are working, as so, this list will be kept to be updated.

✅ - Built and working

Others aren't built, or are presenting errors.

• ✅ 4.1.2 - cusspvz/node:4.1.2 cusspvz/node:4.1.2-onbuild
• ✅ 4.1.1 - cusspvz/node:4.1.1 cusspvz/node:4.1.1-onbuild
• ✅ 4.1.0 - cusspvz/node:4.1.0 cusspvz/node:4.1.0-onbuild
• ✅ 4.0.0 - cusspvz/node:4.0.0 cusspvz/node:4.0.0-onbuild
• ✅ 0.12.7 - cusspvz/node:0.12.7 cusspvz/node:0.12.7-onbuild
• ✅ 0.12.6 - cusspvz/node:0.12.6 cusspvz/node:0.12.6-onbuild
• ✅ 0.12.5 - cusspvz/node:0.12.5 cusspvz/node:0.12.5-onbuild
• ✅ 0.12.4 - cusspvz/node:0.12.4 cusspvz/node:0.12.4-onbuild
• ✅ 0.12.3 - cusspvz/node:0.12.3 cusspvz/node:0.12.3-onbuild
• ✅ 0.12.2 - cusspvz/node:0.12.2 cusspvz/node:0.12.2-onbuild
• ✅ 0.12.1 - cusspvz/node:0.12.1 cusspvz/node:0.12.1-onbuild
• 0.12.0 - cusspvz/node:0.12.0 cusspvz/node:0.12.0-onbuild
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Developing

Building image

VERSION="0.12.7" make build