minimal multi arch httpd docker image

Minimal httpd shell-less multi-arch docker image based on scratch.

The image is based on scratch and contains a static striped busybox binary just including httpd applet. The image is published on docker hub under cmdjulian/httpd:{version}. It supports arm/v6, arm/v7, arm64, i386, amd64, ppc64le and s390x architectures.

Per default, it runs as a non-root user httpd(id=65532). Alternatively, you can also switch to root(id=0).

The http process is started by tini, a small init wrapper. It takes responsibility in forwarding the correct termination signals to the underlying httpd process.

The container does not contain a shell.

Usage

Per default the config file for httpd is empty. It's located under /etc/httpd/httpd.conf.
Per default the server listens on port 8080.
The served root folder is /opt/httpd.
Commandline arguments can be easily overridden via cli: docker run --rm -p 3000:3000 docu:latest -v -p 3000.
Here we keep verbose output and change the port to 3000. We don't need the config file, so we don't provide the cli option either.

Example

The following Dockerfile is an example for an angular app.
The first copy instruction moves the compiled angular ap into the content root.
The second one copies a custom config file to redirects every sub-path to the index.html.

# syntax = docker/dockerfile:1.5.2

FROM cmdjulian/httpd:v1.36.0 

COPY --link ./dist/app/ /opt/httpd
COPY --link <<EOF /etc/httpd/httpd.conf
E404:index.html
EOF

Credits

The image is inspired by Florian Lipans blog post However, it does not provide multi-arch support and also lacks a proper init wrapper like tini. Logo is taken from Mario Pinkster

Development

• To make busybox compile for arm/v7, we have to set CONFIG_LFS=y in the config GitHub issue
• CONFIG_STATIC=y has to be set to compile httpd statically. If we don't do that, the error message from tini is very misleading. It says something like /bin/httpd not found, even if this file exists
• building a specific version can be archived by providing a build-arg as BUSYBOX_VERSION=$VERSION. Keep in mind though, that the config present in config is most definitely not compatible and needs adjustments