system_services.sh

#!/bin/bash
set -e
source /build/buildconfig
set -x

## Install init process.
cp /build/bin/my_init /sbin/
chmod 750 /sbin/my_init
mkdir -p /etc/my_init.d
mkdir -p /etc/container_environment
touch /etc/container_environment.sh
touch /etc/container_environment.json
chmod 700 /etc/container_environment

groupadd -g 8377 docker_env
chown :docker_env /etc/container_environment.sh /etc/container_environment.json
chmod 640 /etc/container_environment.sh /etc/container_environment.json
ln -s /etc/container_environment.sh /etc/profile.d/

## Install runit.
$minimal_apt_get_install runit

## Install a syslog daemon.
$minimal_apt_get_install syslog-ng-core
mkdir /etc/service/syslog-ng
cp /build/runit/syslog-ng /etc/service/syslog-ng/run
chmod +x /etc/service/syslog-ng/run
mkdir -p /var/lib/syslog-ng
cp /build/config/syslog_ng_default /etc/default/syslog-ng
# Replace the system() source because inside Docker we
# can't access /proc/kmsg.
sed -i -E 's/^(\s*)system\(\);/\1unix-stream("\/dev\/log");/' /etc/syslog-ng/syslog-ng.conf

## Install logrotate.
$minimal_apt_get_install logrotate

## Install cron daemon.
$minimal_apt_get_install cron
mkdir /etc/service/cron
cp /build/runit/cron /etc/service/cron/run
chmod +x /etc/service/cron/run

## Remove useless cron entries.
# Checks for lost+found and scans for mtab.
rm -f /etc/cron.daily/standard