Starts and stops local redis instances by index, so that you don't need to remember commands/pids/files to do so

lored.sh

#!/bin/bash

# lored.sh
# Starts and stops local redis instances by index
# so that you don't need to manually type "redis-server --port...." and then later manually `kill` them. 

# Author; George Lester
# Date; 2015/12
###

# The port number immediately before the first redis instance.
# A range starting at "5999" will cause the redis instance "1" to use port "6000"
PORT_RANGE_START=5999

# Modify this parameter if you'd like to add other arguments to each redis' flags.
ADDITIONAL_ARGUMENTS=""

function usage()
{
	echo "Usage: "
	echo ""
	echo "lored <command> <index> (config file)"
	echo ""
	echo "command: The actual action to take ('start'/'stop'/'stopAll')"
	echo "index: Which server instance to perform the command upon"
	echo "config (optional): A path to a file to be used as redis config"
}

function determineIndex()
{
	# Make sure that the second argument is numeric
	integerRegex='^[0-9]+$'
	if ! [[ "$1" =~ $integerRegex ]]; 
	then
		echo "Index '$1' must be an integer"
		exit 1
	fi

	# And that it's > 0
	if [[ "$1" < 1 ]];
	then
		echo "Index must be > 0"
		exit 1
	fi

	portIndex=$(($PORT_RANGE_START + $1))
}

function start()
{
	local configPath=""

	echo "Starting redis on port $portIndex"

	args="--daemonize yes --port "$portIndex" $ADDITIONAL_ARGUMENTS"
	if ! [ -z "$1" ];
	then
		args="$1 $args"
	fi

	redis-server $args
}

function stop()
{
	instance=$(ps aux | grep redis-server | grep "$portIndex" | grep -v grep | tr -s ' ' | cut -d' ' -f2)
	if [ -z "$instance" ];
	then
		echo "Redis was not running, doing nothing."
		return
	fi

	if [ -z "$portIndex" ];
	then
		echo "Stopping all redis instances"
	else
		echo "Stopping redis on port $portIndex"		
	fi
	echo "$instance" | xargs kill
}

function stopAll()
{
	stop ""
}

# Are we stopping all instances?
if [ "$1" == 'stopAll' ];
then

	stopAll
	exit 0
fi

# Otherwise we must be operating on one instance
if [ $# != 2 ] && [ $# != 3 ];
then
	usage
	exit 1
fi

determineIndex $2

if [ $1 == "start" ];
then
	start $3
	exit 0
fi

if [ $1 == "stop" ];
then
	stop
	exit 0
fi