redis.io install and initial setup (Ubuntu 13.04 bash shell) for upstart

redis-install-full.sh

#!/bin/bash

# Install redis and run via upstart on Ubuntu.
# 
# Get Script:
# wget -O redis-install-full.sh https://gist.github.com/jstott/6552270/raw
# chmod +x redis-install-full.sh
#
# Usage: sudo ./redis-install-full.sh
#
# By Jim Stott (https://gist.github.com/jstott)
#
# Tested on Ubuntu 13.04 x64 
# Created at: 2013-09-11
#
# Script based on gists: 
#  Roger Leite (https://github.com/rogerleite)
#   https://gist.github.com/bdotdub/714533
#   from Benny Wong (https://github.com/bdotdub)
#   https://gist.github.com/twoolie/4617553
#   from Thomas Woolford (https://github.com/twoolie)

if [[ $EUID -ne 0 ]]; then
    echo "To run this script you need to be root (or use sudo)" 2>&1
    exit 1
fi

echo "-> apt-get update, upgrade"
apt-get update
apt-get -y upgrade

echo "-> apt-get install build-essential"
apt-get -y install build-essential

echo "-> sudo apt-get install tcl8.5"
apt-get -y install tcl8.5

echo "-> creating redis user"
adduser --system --disabled-password --group --no-create-home --shell /bin/bash redis

echo "-> download redis and build"
wget http://download.redis.io/redis-stable.tar.gz
tar xzf redis-stable.tar.gz
cd redis-stable
make
make test
make install

echo "-> setup directory /etc/redis"
mkdir /etc/redis
chmod ga+rw /etc/redis
cp redis.conf /etc/redis/redis.conf

echo "-> setup directory for /var/redis/dump.rdb"
mkdir /var/redis
chmod ga+rw /var/redis

echo "-> fix up redis.conf paths [dir, tcp-keepalive, logfile] options"
chmod ga+wr /var/log
sed "s:^dir .*$:dir /var/redis/:" -i /etc/redis/redis.conf
sed "s:^tcp-keepalive .*$:tcp-keepalive 60:" -i /etc/redis/redis.conf
sed "s:^logfile stdout$:logfile /var/log/redis.log:" -i /etc/redis/redis.conf

echo "-> set vm.overcommit_memory =1 to prevent background save in low mem condition"
grep -q "^vm.overcommit_memory.*" /etc/sysctl.conf && sed "s:^vm.overcommit_memory .*$:vm.overcommit_memory = 1:" -i /etc/sysctl.conf || sed "$ a\vm.overcommit_memory = 1" -i /etc/sysctl.conf

echo "-> setup redis config for upstart"
echo "-> writing /etc/init/redis-server.conf"
cat <<EOF > /etc/init/redis-server.conf 
description "Redis Server"
author "Rdaemon <http://rdaemon.com/author/rda3mon>"
# http://rdaemon.com/tech/install-redis-from-source-and-configure-upstart-script

# run when the local FS becomes available
# Runlevels
# 0   : System halt
# 1   : Single-User mode
# 2-5 : Graphical multi-user plus networking
# 6   : System reboot

start on local-filesystems
stop on runlevel [016]

#enable this if daemonize=yes in /etc/redis.conf
#expect fork

# respawns if server dies, count=15, timeout=5s
respawn
respawn limit 15 5

env NAME=redis

# start a default instance
instance \$NAME

# run redis as the correct user
setuid redis
setgid redis

# run redis with the correct config file for this instance
exec /usr/local/bin/redis-server /etc/redis/\${NAME}.conf
EOF

echo "-> success!"
cat <<EOF
-> one can check log
tail -f /var/log/redis/redis.log

-> commands to control your redis-server
sudo start   redis-server [ name=redis ]
sudo restart redis-server [ name=redis ]
sudo status  redis-server [ name=redis ]
sudo stop    redis-server [ name=redis ]
EOF
redis-server --version