Install Redis Server on Amazon Linux AMI EC2

init_script

#!/bin/sh
# From - http://www.codingsteps.com/install-redis-2-6-on-amazon-ec2-linux-ami-or-centos/
#
# redis - this script starts and stops the redis-server daemon
#
# chkconfig:   - 85 15 
# description:  Redis is a persistent key-value database
# processname: redis-server
# config:      /etc/redis/redis.conf
# config:      /etc/sysconfig/redis
# pidfile:     /var/run/redis.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

redis="/usr/local/bin/redis-server"
prog=$(basename $redis)

REDIS_CONF_FILE="/etc/redis/redis.conf"

[ -f /etc/sysconfig/redis ] && . /etc/sysconfig/redis

lockfile=/var/lock/subsys/redis

start() {
    [ -x $redis ] || exit 5
    [ -f $REDIS_CONF_FILE ] || exit 6
    echo -n $"Starting $prog: "
    daemon $redis $REDIS_CONF_FILE
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc $prog -QUIT
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    stop
    start
}

reload() {
    echo -n $"Reloading $prog: "
    killproc $redis -HUP
    RETVAL=$?
    echo
}

force_reload() {
    restart
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
	    ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
        exit 2
esac

redis_setup.sh

sudo yum -y update
sudo ln -sf /usr/share/zoneinfo/UTC /etc/localtime
sudo yum -y install gcc make tcl

wget http://download.redis.io/releases/redis-5.0.10.tar.gz -O /tmp/redis-5.0.10.tar.gz
cd /tmp && sudo tar xzf redis-5.0.10.tar.gz && cd redis-5.0.10 && sudo make
# sudo make test
 
# Create Directories and Copy Redis Files
sudo mkdir -p /etc/redis && sudo mkdir -p /var/lib/redis
sudo cp src/redis-server src/redis-cli /usr/local/bin/
sudo cp redis.conf /etc/redis/

# Configure redis.conf
# replace: daemonize no --> daemonize yes
sudo sed -i '/\#/! s/daemonize no/daemonize yes/' /etc/redis/redis.conf
# replace: dir ./ --> dir /var/lib/redis
sudo sed -i '/\#/! s/dir .\//dir \/var\/lib\/redis/' /etc/redis/redis.conf

# CAUTION: If you do the following ensure the instance is not easily accessible on public internet

# replace: protected-mode yes --> protected-mode no 
sudo sed -i 's/protected-mode yes/protected-mode no/' /etc/redis/redis.conf
# replace: bind 127.0.0.1 --> # bind 127.0.0.1. THIS WILL EXPOSE REDIS TO ALL NETWORK INTERFACES
sudo sed -i '/\#/! s/bind 127.0.0.1/bind 0.0.0.0/' /etc/redis/redis.conf

# if redis exceeds the memory of the instance it will eject old keys by default. Do we want this?
# sudo sed -i '/\#/! s/maxmemory <bytes>/maxmemory 800mb/' /etc/redis/redis.conf
# sudo sed -i 's/\# maxmemory-policy noeviction/maxmemory-policy volatile-lru/' /etc/redis/redis.conf

# Download init Script
wget https://gist.githubusercontent.com/emmanuelnk/d698e8acc7058af8a3cbe460fd32987a/raw/init_script?o=k -O /tmp/redis-server

# Move and Configure Redis-Server
# Note: The redis-server to be moved below is the one downloaded above.
sudo mv /tmp/redis-server /etc/init.d
sudo chmod 755 /etc/init.d/redis-server

# Auto-Enable Redis-Server
sudo chkconfig --add redis-server
sudo chkconfig --level 345 redis-server on
 
# Start Redis Server
sudo service redis-server start