services

#!/bin/bash
#
#  Command Line Interface to start all services associated with the Tutorial
#
#  For this tutorial the commands are merely a convenience script to run docker or docker-compose
#
#  Each services script can be run using either docker-compose (the external tool with the hyphen -) 
#  or docker compose (the newer version directly bundled with Docker with a space )
#
#  if you start up with the following command:
#
#  ./services start legacy
#
# This will force the script to use docker-compose which may be more reliable in 
# some cases (or if an older version of Docker is being used)

set -e

dockerCmd="docker compose"
if (( $# == 2 )); then
    dockerCmd="docker-compose"
fi

if (( $# < 1 )); then	echo "Illegal number of parameters"
	echo "usage: services [create|start|stop]"
	exit 1
fi

stoppingContainers () {
	CONTAINERS=$(docker ps --filter "label=org.fiware=tutorial" -aq)
	if [[ -n $CONTAINERS ]]; then 
		echo "Stopping containers"
		docker rm -f $CONTAINERS || true
	fi
	VOLUMES=$(docker volume ls -qf dangling=true) 
	if [[ -n $VOLUMES ]]; then 
		echo "Removing old volumes"
		docker volume rm $VOLUMES || true
	fi
	NETWORKS=$(docker network ls  --filter "label=org.fiware=tutorial" -q) 
	if [[ -n $NETWORKS ]]; then 
		echo "Removing tutorial networks"
		docker network rm $NETWORKS || true
	fi
}

addDatabaseIndex () {
	printf "Create \033[1mMongoDB\033[0m database indexes ..."
	docker exec  db-mongo mongo --eval '
	conn = new Mongo();db.createCollection("orion");
	db = conn.getDB("orion");
	db.createCollection("entities");
	db.entities.createIndex({"_id.servicePath": 1, "_id.id": 1, "_id.type": 1}, {unique: true});
	db.entities.createIndex({"_id.type": 1}); 
	db.entities.createIndex({"_id.id": 1});' > /dev/null
	echo -e " \033[1;32mdone\033[0m"
}

displayServices () {
	echo ""
	docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}" --filter name=fiware-*
	echo ""
}

waitForMongo () {
	echo -e "\n⏳ Waiting for \033[1mMongoDB\033[0m to be available\n"
	while ! [ `docker inspect --format='{{.State.Health.Status}}' db-mongo` == "healthy" ]
	do 
		sleep 1
	done
}

waitForOrion () {
	echo -e "\n⏳ Waiting for \033[1;34mOrion\033[0m to be available\n"

	while ! [ `docker inspect --format='{{.State.Health.Status}}' fiware-orion` == "healthy" ]
	do
	  echo -e "Context Broker HTTP state: " `curl -s -o /dev/null -w %{http_code} 'http://localhost:1026/version'` " (waiting for 200)"
	  sleep 1
	done
}

command="$1"
case "${command}" in
	"help")
		echo "usage: services [create|start|stop]"
		;;
	"start")
		export $(cat .env | grep "#" -v)
		stoppingContainers
		echo -e "Starting containers: \033[1;34mOrion\033[0m and a \033[1mMongoDB\033[0m database."
		echo -e "- \033[1;34mOrion\033[0m is the context broker"
		echo ""
		${dockerCmd} up -d --remove-orphans
		waitForMongo
		addDatabaseIndex
		displayServices
		;;
	"stop")
		export $(cat .env | grep "#" -v)
		stoppingContainers
		;;
	"create")
		export $(cat .env | grep "#" -v)
		echo "Pulling Docker images"
		docker pull curlimages/curl
		${dockerCmd} pull
		;;
	*)
		echo "Command not Found."
		echo "usage: services [create|start|stop]"
		exit 127;
		;;
esac