entrypoint.sh

#!/bin/bash

set -e

USERNAME=${USERNAME:-user}
PASSWORD=${PASSWORD:-pass}
ALLOW=${ALLOW:-10.0.0.0/8 172.16.0.0/12 192.168.0.0/16}
VOLUME=${VOLUME:-/data}

setup_sshd() {
    if [ -e "/root/.ssh/authorized_keys" ]; then
        chmod 400 /root/.ssh/authorized_keys
        chown root:root /root/.ssh/authorized_keys
    else
        mkdir -p /root/.ssh
        chown root:root /root/.ssh
    fi
    chmod 750 /root/.ssh
    echo "root:$PASSWORD" | chpasswd
}

setup_rsyncd() {
    echo "$USERNAME:$PASSWORD" >/etc/rsyncd.secrets
    chmod 0400 /etc/rsyncd.secrets
    [ -f /etc/rsyncd.conf ] || cat >/etc/rsyncd.conf <<EOF
# pid file = /var/run/rsyncd.pid
log file = /dev/stdout
timeout = 300
max connections = 10
port = 873

[volume]
	uid = root
	gid = root
	hosts deny = *
	hosts allow = ${ALLOW}
	read only = false
	path = ${VOLUME}
	comment = ${VOLUME} directory
	auth users = ${USERNAME}
	secrets file = /etc/rsyncd.secrets
EOF
}

watch_files() {
    if [ -n "${SERVICE_NAMES}" ]; then
        echo "inotify will push to ${SERVICE_NAMES}"
        /bin/bash /inotify-rsync.sh &
    fi
}

if [ "$1" = "rsync_server" ]; then
    echo "rsync server start"
    setup_sshd
    exec /usr/sbin/sshd &
    mkdir -p $VOLUME
    setup_rsyncd
    watch_files
    exec /usr/bin/rsync --no-detach --daemon --config /etc/rsyncd.conf "$@"
else
    setup_sshd
    exec /usr/sbin/sshd &
fi

exec "$@"