Bootstrap:library
From: debian:9

%environment

	#Setting up the hostname and port
	HOSTNAME=127.0.0.1
	PORT=27017
	export HOSTNAME PORT

%help

	Singularity container running MongoDB v4.0.3 Community Edition for Debian 9 (Stretch)

%post

	#Setting up where data will reside
	mkdir -p /data/db
	#Give access to the folder
	chmod -R 777 /data/db

	#Needed dependencies from GnuPG
	apt-get update && apt-get install -y gnupg

	#Importing the public key
	apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4

	#Obtaining and installing MongoDB for Debian 9 (Stretch)
	echo "deb http://repo.mongodb.org/apt/debian stretch/mongodb-org/4.0 main" | tee /etc/apt/sources.list.d/mongodb-org-4.0.list
	apt-get -y update
	apt-get install -y mongodb-org

	#Giving access to the mongodb user from the mongodb group user (these are the defaults from MongoDB)
	chown -R mongodb:mongodb /data/db

%startscript

	#Stops the daemon if it is already running
	mongod --repair
	#Starts the daemon
	mongod
	#Starts the mongo shell in the hostname and port set from environment
	mongo --host $HOSTNAME:$PORT