Dockerfile

FROM ubuntu:14.04
MAINTAINER Bart Meuris

RUN apt-get update && \
        apt-get -y install irssi irssi-scripts && \
        useradd irssi && \
        mkdir -p /home/irssi && \
        chown -R irssi:irssi /home/irssi && \
        mkdir /config && \
        chown irssi:irssi /config && \
        ln -s /config /home/irssi/.irssi

USER irssi

ENV HOME /home/irssi

ENTRYPOINT [ "/usr/bin/irssi" ]

irc.sh

#!/bin/bash

IMAGENAME=irssi

NAME="irssi-$USER"

# Create data container if it does not exist
DATANAME="${NAME}-data"
if ! docker ps -a | grep -q -- "${DATANAME}"'[ ]*$'; then
  echo "irssi data container missing - creating..."
  docker run --name "${DATANAME}" --hostname "${DATANAME}" -v /config --entrypoint /bin/bash $IMAGENAME /bin/bash -c "chown -R irssi:irssi /config"
fi

NAMES="--name $NAME --hostname $NAME"
TIMEZONE="-v /etc/timezone:/etc/timezone:ro -v /etc/localtime:/etc/localtime:ro"

# Test if container exists, attach if it does, otherwise start a new-one
if docker ps | grep -q -- "${NAME}"'[ ]*$'; then
  echo "Attaching... (press <C-l> to refresh display)"
  exec docker attach $NAME
elif docker ps -a | grep -q -- "${NAME}"'[ ]*$'; then
  docker rm $NAME
fi
exec docker run -t -i --log-driver none --sig-proxy $TIMEZONE --volumes-from "${DATANAME}" $NAMES $IMAGENAME