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holmser / alpine-node

Minimal Node/io.js Docker Images built on Alpine Linux

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Minimal Node.js Docker Images (18MB, or 6.7MB compressed)

Versions v6.2.1, v5.11.1, v4.4.5, v0.12.14, v0.10.45, and io.js – built on Alpine Linux.

All versions use the one mhart/alpine-node repository, but each version aligns with the following tags (ie, mhart/alpine-node:<tag>):

  • Full install built with npm:
    • latest, 6, 6.2, 6.2.1 – 46.24 MB (npm 3.9.5)
    • 5, 5.11, 5.11.1 – 39.36 MB (npm 3.8.9)
    • 4, 4.4, 4.4.5 – 36.31 MB (npm 2.15.6)
    • 0.12, 0.12.14 – 32.93 MB (npm 2.15.5)
    • 0.10, 0.10.45 – 28.38 MB (npm 2.15.5)
  • Base install with node built as a static binary with no npm:
    • base, base-6, base-6.2, base-6.2.1 – 35.09 MB
    • base-5, base-5.11, base-5.11.1 – 27.63 MB
    • base-4, base-4.4, base-4.4.5 – 27.23 MB
    • base-0.12, base-0.12.14 – 24.14 MB
    • base-0.10, base-0.10.45 – 18.3 MB

Major io.js versions are tagged too.

Examples

$ docker run mhart/alpine-node node --version
v6.2.1

$ docker run mhart/alpine-node npm --version
3.9.0

$ docker run mhart/alpine-node:5 node --version
v5.11.1

$ docker run mhart/alpine-node:4 node --version
v4.4.5

$ docker run mhart/alpine-node:base node --version
v6.2.1

$ docker run mhart/alpine-node:base-0.10 node --version
v0.10.45

Example Dockerfile for your own Node.js project

If you don't have any native dependencies, ie only depend on pure-JS npm modules, then my suggestion is to run npm install locally before running docker build (and make sure node_modules isn't in your .dockerignore) – then you don't need an npm install step in your Dockerfile and you don't need npm installed in your Docker image – so you can use one of the smaller base* images.

FROM mhart/alpine-node:base
# FROM mhart/alpine-node:base-0.10
# FROM mhart/alpine-node

WORKDIR /src
ADD . .

# If you have native dependencies, you'll need extra tools
# RUN apk add --no-cache make gcc g++ python

# If you need npm, don't use a base tag
# RUN npm install

EXPOSE 3000
CMD ["node", "index.js"]

Caveats

Tags 6.x of this image now use Alpine 3.4 – earlier versions use Alpine 3.3 although this may change if there are no issues reported with 3.4

As Alpine Linux uses musl, you may run into some issues with environments expecting glibc-like behaviour (for example, Kubernetes). Some of these issues are documented here:

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Minimal Node/io.js Docker Images built on Alpine Linux

License:MIT License