alpine-s6-docker

An alpine based docker image with s6-overlay.

This build uses docker buildx plugin with docker-container driver.
This uses the tonistiigi/binfmt emulator plugin.
Docker image available at swarupsengupta2007/alpine-s6.

# clone this repo
git clone https://github.com/swarupsengupta2007/alpine-s6-docker

Building

1. Ensure buildx is enabled for docker.
2. Create a builder instance for multi-arch.
3. Ensure cross-platform emulators are installed.
4. Build docker image for current platform or multi-arch.

# choose target platforms
TARGETS="linux/amd64,linux/386,linux/arm64,linux/arm/v7,linux/arm/v6"

# create a builder instance if it doesn't exists
docker buildx create --name cross-platform --platform ${TARGETS} --use  

# Install cross platform emulators if not already instaled
docker run --privileged --rm tonistiigi/binfmt --install all

# build for current platform and load to docker image
docker buildx build -t <your_tag> . --load

# build for multi-arch and push to registry
docker buildx build -t <your_username>/<your_tag> --platform ${TARGETS} . --push

Build-args available

build-arg	default	Description
DEF_USER	appuser	user created for this image
DEF_GROUP	appuser	group created for this image's user
DEF_UID	1000	UID of the DEF_USER
DEF_GID	1000	GID of the DEF_USER
DEF_CONFIG	/config	config director, also serves as volume
DEF_APP	/app	app directory used to store app's binary/scripts
DEF_DEFAULTS	/defaults	defaults directory for containing greenfield configurations
BASE_VERSION	3.16.0	os version to use as base
S6VERSION	3.1.0.1	s6-overlay version to use base
BASE_OS	alpine	option to change base os (untested)

---

Usage

Using docker-cli

sudo docker run 
    --rm                          \
    -it                           \
    -v /path/to/config:/config    \
    swarupsengupta2007/alpine-s6  \
    sh

The following Environment var are available

ENV variable	Description	Default
PUID	The UID for DEF_USER	1000
PGID	The GID for DEF_USER	1000