Redis is a an Open Source advanced key-value cache and store .

Redis Defualt port number : 6379

Redis Source Package Version : Redis 3.0.2 Stable Version (Release Notes)
Redis Download URL : http://redis.io/download

What’s new in Redis 3.0 compared to Redis 2.8?

Redis Cluster: a distributed implementation of a subset of Redis.
New “embedded string” object encoding resulting in less cache misses. Big speed gain under certain work loads.
AOF child -> parent final data transmission to minimize latency due to “last write” during AOF rewrites.
Much improved LRU approximation algorithm for keys eviction.
WAIT command to block waiting for a write to be transmitted to
the specified number of slaves.
MIGRATE connection caching. Much faster keys migraitons.
MIGRATE new options COPY and REPLACE.
CLIENT PAUSE command: stop processing client requests for a specified amount of time.
BITCOUNT performance improvements.
CONFIG SET accepts memory values in different units (for example you can use “CONFIG SET maxmemory 1gb”).
Redis log format slightly changed reporting in each line the role of the instance (master/slave) or if it’s a saving child log.
INCR performance improvements.

Follow the given below steps to install redis server on CentOS 7 and Red Hat Enterprise Linux 7.

Install wget utility

yum install wget

Install EPEL repo

First we will install the EPEL repo. For more detail on EPEL repo, we suggest you to read our this post.

Because our system has x86_64 Operating System architecture, we will use only epel repo package for x86_64 . Search epel repo package as per your Operating System architecture(EPEL URL)

wget -r --no-parent -A 'epel-release-*.rpm' http://dl.fedoraproject.org/pub/epel/7/x86_64/e/

rpm -Uvh dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-*.rpm

Install redis server

Now use yum command to install redis server

yum install redis

Two important redis server configuration file’s path

/etc/redis.conf
/etc/redis-sentinel.conf

Now start the redis server after this.

systemctl start redis.service
systemctl status redis.service
systemctl stop redis.service
systemctl restart redis.service

To test the installation of Redis, use below given command

redis-cli ping

If the response output is PONG, it means installation is completed successfully.

[root@localhost ~]# redis-cli ping
PONG
[root@localhost ~]#

To enable redis server at system’s booting time.To disable redis server at system’s booting time.

systemctl enable redis.service
systemctl disable redis.service

Install Redis 3.0 On Ubuntu 14.04 / CentOS 7 / RHEL 7

Let’s quickly start the installation of Redis Server from source on Ubuntu/CentOS/Debian/RHEL .
You can follow the given below steps in Ubuntu/CentOS/RHEL as per defined commands.
Note: yum command is used in RHEL/CentOS and apt-get command used in Ubuntu/Debian .

Install prerequisite for Redis

Make and GCC packages are used for compiling the source package. Whereas, we are installing wget for downloading the redis source package.

In CentOS 7 / RHEL 7

yum install make gcc wget

In Ubuntu

sudo apt-get update
sudo apt-get install install make gcc wget

SPECIAL NOTE TO UBUNTU USER : Login as super user and follow the below given steps. To become superuser, use the below given command .

sudo su -

or

su -

Download Redis 3 stable Source package

Use wget command to download the stable release Redis 3.0.2 . We recommend you to always install stable release, which you can search in Redis Download URL

wget http://download.redis.io/releases/redis-3.0.2.tar.gz

Untar downloaded Redis Tar ball

Use the tar command to extract out the Redis from the downloaded tarball file.

tar -xvzf redis-3.0.2.tar.gz

Compiling of Redis from source

Once you extract the Redis Package from tarball, you will get the Redis directory.
In our case, we got directory with name called redis-3.0.2 .

Change to extracted out redis directory. Now you will do most of the command activity inside redis package directory ( i.e redis-3.0.2)

cd redis-3.0.2

Now compiling the dependencies of Redis , available inside extracted out redis directory.

cd deps
make hiredis lua jemalloc linenoise

Once the dependencies are compiled, now start compiling the redis. For this you have to change to one level back. Means go back to Redis installation directory.

cd ..
make
make install

The redis server is installed only with binaries in your system. In next section we will install init script.

Install init script

In this section we will install init script to manage the process of Redis.
You can use this method in CentOS 7/ RHEL 7 / Ubuntu 14.04 .

I hope you are still inside the Redis installation Directory. Inside the directory you will see utils directory . We have to change to utils directory and run the install_server.sh script.

cd utils
./install_server.sh

Now you script will ask some question. When you hit only ENTER, the system will take default value or answer.

Given below is reference from our server.

[root@localhost redis-3.0.2]# cd utils/
[root@localhost utils]# ./install_server.sh
Welcome to the redis service installer
This script will help you easily set up a running redis server

Please select the redis port for this instance: [6379]
Selecting default: 6379
Please select the redis config file name [/etc/redis/6379.conf]
Selected default - /etc/redis/6379.conf
Please select the redis log file name [/var/log/redis_6379.log]
Selected default - /var/log/redis_6379.log
Please select the data directory for this instance [/var/lib/redis/6379]
Selected default - /var/lib/redis/6379
Please select the redis executable path [/usr/local/bin/redis-server]
Selected config:
Port           : 6379
Config file    : /etc/redis/6379.conf
Log file       : /var/log/redis_6379.log
Data dir       : /var/lib/redis/6379
Executable     : /usr/local/bin/redis-server
Cli Executable : /usr/local/bin/redis-cli
Is this ok? Then press ENTER to go on or Ctrl-C to abort.
Copied /tmp/6379.conf => /etc/init.d/redis_6379
Installing service...
Successfully added to chkconfig!
Successfully added to runlevels 345!
Starting Redis server...
Installation successful!
[root@localhost utils]#
Redis start/stop/restart/status

Once the all above steps are done, we can start/stop/restart the Redis Server and also check its status.

In CentOS 7 / RHEL 7

To check status of Redis Server

systemctl stop redis_6379

To start Redis Server

systemctl start redis_6379

To stop Redis Server

systemctl stop redis_6379

To restart the Redis Server

systemctl restart redis_6379

In Ubuntu

To check the status Redis Server

service redis_6379 status

To start Redis Server

service redis_6379 start

To stop Redis Server

service redis_6379 stop

To restart Redis Server

service redis_6379 restart

Login into Redis Server

To login into redis server is quite easy. The command is applicable in CentOS 7/RHEL 7/ Ubuntu (as per this post, we only only selected these 3 Operating system)

Use below given command to login into redis server from localhost .

redis-cli

See below given reference.

[root@localhost ~]# redis-cli
127.0.0.1:6379>
127.0.0.1:6379>
127.0.0.1:6379> exit
[root@localhost ~]#

To check help of redis-cli command.

redis-cli --help

Check listening ports by redis

Use ss command to find the listening port.

ss -tanp|grep 6379
Given below is reference,

[root@localhost ~]# ss -tanp|grep 6379
LISTEN     0      128                       *:6379                     *:*      users:(("redis-server",8032,5))
LISTEN     0      128                      :::6379                    :::*      users:(("redis-server",8032,4))
[root@localhost ~]#

高校的小站

Redis之安装

Follow the given below steps to install redis server on CentOS 7 and Red Hat Enterprise Linux 7.

Install Redis 3.0 On Ubuntu 14.04 / CentOS 7 / RHEL 7

Install prerequisite for Redis

In CentOS 7 / RHEL 7

In Ubuntu

Download Redis 3 stable Source package

Install init script

To check status of Redis Server

To start Redis Server

To stop Redis Server

To restart the Redis Server

To check the status Redis Server

To start Redis Server

To stop Redis Server

To restart Redis Server

Login into Redis Server