FROM dockage/alpine:3.7
MAINTAINER Mohammad Abdoli Rad <m.abdolirad@gmail.com>

LABEL org.label-schema.name="alpine-openrc" \
        org.label-schema.vendor="Dockage" \
        org.label-schema.description="Docker image uses openRC as a process supervision on Alpine Linux" \
        org.label-schema.vcs-url="https://github.com/dockage/alpine-openrc" \
        org.label-schema.version="3.7" \
        org.label-schema.license="MIT"

RUN set -x \
    && apk add --update --no-cache openrc \
    # Disable getty's
    && sed -i 's/^\(tty\d\:\:\)/#\1/g' /etc/inittab \
    && sed -i \
        # Change subsystem type to "docker"
        -e 's/#rc_sys=".*"/rc_sys="docker"/g' \
        # Allow all variables through
        -e 's/#rc_env_allow=".*"/rc_env_allow="\*"/g' \
        # Start crashed services
        -e 's/#rc_crashed_stop=.*/rc_crashed_stop=NO/g' \
        -e 's/#rc_crashed_start=.*/rc_crashed_start=YES/g' \
        # Define extra dependencies for services
        -e 's/#rc_provide=".*"/rc_provide="loopback net"/g' \
        /etc/rc.conf \
    # Remove unnecessary services
    && rm -f /etc/init.d/hwdrivers \
            /etc/init.d/hwclock \
            /etc/init.d/hwdrivers \
            /etc/init.d/modules \
            /etc/init.d/modules-load \
            /etc/init.d/modloop \
    # Can't do cgroups
    && sed -i 's/cgroup_add_service /# cgroup_add_service /g' /lib/rc/sh/openrc-run.sh \
    && sed -i 's/VSERVER/DOCKER/Ig' /lib/rc/sh/init.sh

WORKDIR /etc/init.d
CMD ["/sbin/init"]