Dockerfile and startup script for opencpu/nodejs container

Dockerfile

FROM node:8.4-slim

# Mod repo list
RUN echo "deb http://deb.debian.org/debian jessie-backports main" >> /etc/apt/sources.list && \
  echo "deb-src http://ppa.launchpad.net/opencpu/opencpu-2.0/ubuntu xenial main" > /etc/apt/sources.list.d/opencpu.list && \
  echo "deb-src http://httpredir.debian.org/debian/ jessie main contrib non-free" >> /etc/apt/sources.list && \
  echo "deb-src http://httpredir.debian.org/debian/ jessie-updates main contrib" >> /etc/apt/sources.list non-free && \
  echo "deb-src http://httpredir.debian.org/debian/ jessie-proposed-updates contrib main non-free" >> /etc/apt/sources.list && \
  echo "deb-src http://httpredir.debian.org/debian/ jessie-backports main contrib non-free" >> /etc/apt/sources.list  && \
  echo "deb http://deb.debian.org/debian stretch main" >> /etc/apt/sources.list && \
  echo "deb http://deb.debian.org/debian stretch-updates main" >> /etc/apt/sources.list && \
  echo "deb http://security.debian.org stretch/updates main" >> /etc/apt/sources.list && \
  echo "deb-src http://security.debian.org/ jessie/updates main contrib non-free" >> /etc/apt/sources.list && \
  apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4E8D912328F1D0FA8E4BF3BD5D0F7D9B7B3E569E && \
  apt-get update && \
  apt-get -y dist-upgrade

# Get dependencies from jessie repo
RUN apt-get -t jessie-backports install -y r-recommended r-base r-base-core r-base-dev && \
  apt-get install -y software-properties-common devscripts build-essential \
      r-cran-codetools libicu-dev libprotobuf-dev protobuf-compiler apache2 \
      apache2-dev libapache2-mod-r-base ssl-cert locales \
      libapparmor-dev libcurl4-openssl-dev libssl-dev libxml2-dev libssh2-1-dev \
      xvfb xauth xfonts-base pkg-config && \
  apt-get source --build opencpu && \
  dpkg -i opencpu-lib_2.0.4-xenial0_amd64.deb opencpu-server_2.0.4-xenial0_all.deb

# Cleanup
RUN apt-get autoremove -y && \
  rm -rf opencpu*

COPY startup.sh /startup.sh

# WORKDIR of child Dockerfile needs to be wherever node source is located
CMD /startup.sh

startup.sh

#!/bin/bash

#start apache for opencpu
apachectl -k start

#start node app, WORKDIR of child Dockerfile needs to be wherever node source is located
npm start &

# Naive check runs checks once a minute to see if either of the processes exited.
# This illustrates part of the heavy lifting you need to do if you want to run
# more than one service in a container. The container will exit with an error
# if it detects that either of the processes has exited.
# Otherwise it will loop forever, waking up every 60 seconds

while /bin/true; do
  ps aux |grep apache2 |grep -q -v grep
  PROCESS_1_STATUS=$?
  ps aux |grep npm |grep -q -v grep
  PROCESS_2_STATUS=$?
  # If the greps above find anything, they will exit with 0 status
  # If they are not both 0, then something is wrong
  if [ $PROCESS_1_STATUS -ne 0 ]; then
    echo "The apache process has exited."
    exit -1
  fi

  if [ $PROCESS_2_STATUS -ne 0 ]; then
    echo "The node process has exited."
    exit -1
  fi
  sleep 60
done