{"id":1881,"date":"2015-04-23T10:18:50","date_gmt":"2015-04-23T10:18:50","guid":{"rendered":"https:\/\/www.milesweb.com\/hosting-faqs\/?p=1881"},"modified":"2018-05-19T12:10:29","modified_gmt":"2018-05-19T12:10:29","slug":"what-is-redis-and-how-to-install-it","status":"publish","type":"post","link":"https:\/\/www.milesweb.in\/hosting-faqs\/what-is-redis-and-how-to-install-it\/","title":{"rendered":"What Is Redis And How To Install It?"},"content":{"rendered":"

What is Redis?<\/strong><\/h3>\n

Redis is an BSD licensed, open source, advanced key-value cache and store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets, sorted sets, bitmaps and hyperloglogs. Refer redis.io\/topics\/introduction<\/strong> to know more about Redis. <\/p>\n

We will learn how to install redis on a CentOS cPanel server. On a CentOS cPanel server, we will need to install redis daemon & the redis PHP extension. Once installed & enabled it helps in boosting the eCommerce website performance.<\/p>\n

Install Redis Daemon<\/strong><\/h3>\n

cd \/usr\/local\/
\nwget http:\/\/download.redis.io\/releases\/redis-2.8.12.tar.gz
\ntar -xvzf redis-2.8.12.tar.gz
\ncd redis-2.8.12
\nmake
\ncp src\/redis-server \/usr\/local\/bin
\ncp src\/redis-cli \/usr\/local\/bin
\nmkdir -p \/etc\/redis
\nmkdir -p \/var\/redis
\ncp redis.conf \/etc\/redis\/redis.conf<\/strong><\/p>\n

Now, let’s edit \/etc\/redis\/redis.conf & configure it to work with the server. Set the values as below.<\/p>\n

daemonize yes
\nport 6379
\nbind 127.0.0.1
\ndir \/var\/redis\/
\nlogfile \/var\/log\/redis.log
\npidfile \/var\/run\/redis.pid<\/strong><\/p>\n

We will now need a startup script which will start, stop, restart redis on your server. Create a file \/etc\/init.d\/redis & add below content. Set permissions to 755 so that the file is executable.<\/p>\n

#!\/bin\/sh
\n#
\n# redis – this script starts and stops the redis-server daemon
\n#
\n# chkconfig: – 85 15
\n# description: Redis is a persistent key-value database
\n# processname: redis-server
\n# config: \/etc\/redis\/redis.conf
\n# config: \/etc\/sysconfig\/redis
\n# pidfile: \/var\/run\/redis.pid<\/strong><\/p>\n

# Source function library.<\/strong>
\n . \/etc\/rc.d\/init.d\/functions<\/strong><\/p>\n

# Source networking configuration.<\/strong>
\n . \/etc\/sysconfig\/network<\/strong><\/p>\n

# Check that networking is up.<\/strong>
\n [ “$NETWORKING” = “no” ] && exit 0<\/strong><\/p>\n

redis=”\/usr\/local\/bin\/redis-server”<\/strong>
\n prog=$(basename $redis)<\/strong><\/p>\n

REDIS_CONF_FILE=”\/etc\/redis\/redis.conf”<\/strong><\/p>\n

[ -f \/etc\/sysconfig\/redis ] && . \/etc\/sysconfig\/redis<\/strong><\/p>\n

lockfile=\/var\/lock\/subsys\/redis<\/strong><\/p>\n

start() {<\/strong>
\n [ -x $redis ] || exit 5<\/strong>
\n [ -f $REDIS_CONF_FILE ] || exit 6<\/strong>
\n echo -n $”Starting $prog: “<\/strong>
\n daemon $redis $REDIS_CONF_FILE<\/strong>
\n retval=$?<\/strong>
\n echo<\/strong>
\n [ $retval -eq 0 ] && touch $lockfile<\/strong>
\n return $retval<\/strong>
\n }<\/strong><\/p>\n

stop() {<\/strong>
\n echo -n $”Stopping $prog: “<\/strong>
\n killproc $prog -QUIT<\/strong>
\n retval=$?<\/strong>
\n echo<\/strong>
\n [ $retval -eq 0 ] && rm -f $lockfile<\/strong>
\n return $retval<\/strong>
\n }<\/strong><\/p>\n

restart() {<\/strong>
\n stop<\/strong>
\n start<\/strong>
\n }<\/strong><\/p>\n

reload() {<\/strong>
\n echo -n $”Reloading $prog: “<\/strong>
\n killproc $redis -HUP<\/strong>
\n RETVAL=$?<\/strong>
\n echo<\/strong>
\n }<\/strong><\/p>\n

force_reload() {<\/strong>
\n restart<\/strong>
\n }<\/strong><\/p>\n

rh_status() {<\/strong>
\n status $prog<\/strong>
\n }<\/strong><\/p>\n

rh_status_q() {<\/strong>
\n rh_status >\/dev\/null 2>&1<\/strong>
\n }<\/strong><\/p>\n

case “$1” in<\/strong>
\n start)<\/strong>
\n rh_status_q && exit 0<\/strong>
\n $1<\/strong>
\n ;;<\/strong>
\n stop)<\/strong>
\n rh_status_q || exit 0<\/strong>
\n $1<\/strong>
\n ;;<\/strong>
\n restart|configtest)<\/strong>
\n $1<\/strong>
\n ;;<\/strong>
\n reload)<\/strong>
\n rh_status_q || exit 7<\/strong>
\n $1<\/strong>
\n ;;<\/strong>
\n force-reload)<\/strong>
\n force_reload<\/strong>
\n ;;<\/strong>
\n status)<\/strong>
\n rh_status<\/strong>
\n ;;<\/strong>
\n condrestart|try-restart)<\/strong>
\n rh_status_q || exit 0<\/strong>
\n ;;<\/strong>
\n *)<\/strong>
\n echo $”Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}”<\/strong>
\n exit 2<\/strong>
\n esac<\/strong><\/p>\n

Update the system services & configure redis daemon to start after server reboot.<\/p>\n

chkconfig –add redis
\nchkconfig redis on<\/strong><\/p>\n

Start the redis service with command below. You can use command redis-cli ping<\/strong> to check if it works properly. If you get a result PONG it means redis is working.<\/p>\n

\/etc\/init.d\/redis start<\/strong><\/p>\n

To know more about the command and it’s options use redis-cli –help<\/strong>.<\/p>\n

Install Redis PHP Extension<\/em><\/strong><\/p>\n

Redis PHP extension is installed by performing couple of commands.<\/p>\n

pecl install redis<\/strong><\/p>\n

Open the server’s php.ini file & add extension=redis.so<\/strong> to it. You can get the server’s php.ini file with command php -i | grep php.ini<\/strong>. Restart apache (your web server) & you are done.<\/p>\n","protected":false},"excerpt":{"rendered":"

What is Redis? Redis is an BSD licensed, open source, advanced key-value cache and store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets, sorted sets, bitmaps and hyperloglogs. Refer redis.io\/topics\/introduction to know more about Redis.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1881","post","type-post","status-publish","format-standard","placeholder-for-hentry","category-howtos"],"yoast_head":"\nWhat Is Redis And How To Install It?<\/title>\n<meta name=\"description\" content=\"Redis is an BSD licensed, open source, advanced key-value cache and store.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.milesweb.in\/hosting-faqs\/what-is-redis-and-how-to-install-it\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is Redis And How To Install It?\" \/>\n<meta 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