How to install and configure redis on CentOS 7 step by step guide

In this tutorial we learn how to What is edis and how to install and configure redis on centos 7 step by step guide.

What is redis

Redis is an open-source in-memory data structure store. Redis can be used as a database, caching purpose and supports various data structures such as Strings, Hashes, Lists, Sets, etc.

Installation redis on centos 7

By default redis package is not available in the centos repository. So we need to enable remi repository to install redis package on the centos server. To install the remi repo we need to execute the below commands.

[root@localhost ~]# yum install epel-release yum-utils

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* base: centos.excellmedia.net

* extras: centos.excellmedia.net

* updates: centos.excellmedia.net

Resolving Dependencies

--> Running transaction check

---> Package epel-release.noarch 0:7-11 will be installed

---> Package yum-utils.noarch 0:1.1.31-50.el7 will be installed

--> Processing Dependency: python-kitchen for package: yum-utils-1.1.31-50.el7.noarch

--> Processing Dependency: libxml2-python for package: yum-utils-1.1.31-50.el7.noarch

--> Running transaction check

---> Package libxml2-python.x86_64 0:2.9.1-6.el7_2.3 will be installed

---> Package python-kitchen.noarch 0:1.1.1-5.el7 will be installed

--> Processing Dependency: python-chardet for package: python-kitchen-1.1.1-5.el7.noarch

--> Running transaction check

---> Package python-chardet.noarch 0:2.2.1-1.el7_1 will be installed

--> Finished Dependency Resolution

……………………….

Installed:

epel-release.noarch 0:7-11 yum-utils.noarch 0:1.1.31-50.el7

Dependency Installed:

libxml2-python.x86_64 0:2.9.1-6.el7_2.3 python-chardet.noarch 0:2.2.1-1.el7_1 python-kitchen.noarch 0:1.1.1-5.el7

Complete!

[root@localhost ~]# yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm

Loaded plugins: fastestmirror

remi-release-7.rpm | 15 kB 00:00:00

Examining /var/tmp/yum-root-F256As/remi-release-7.rpm: remi-release-7.6-1.el7.remi.noarch

Marking /var/tmp/yum-root-F256As/remi-release-7.rpm to be installed

Resolving Dependencies

--> Running transaction check

---> Package remi-release.noarch 0:7.6-1.el7.remi will be installed

--> Finished Dependency Resolution

Total size: 18 k

Installed size: 18 k

Is this ok [y/d/N]: y

Downloading packages:

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Installing : remi-release-7.6-1.el7.remi.noarch 1/1

Verifying : remi-release-7.6-1.el7.remi.noarch 1/1

Installed:

remi-release.noarch 0:7.6-1.el7.remi

Complete!

And the type the below command.

[root@localhost ~]# yum-config-manager --enable remi

To install redis package type the below command.

[root@localhost ~]# yum install redis

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* base: centos.excellmedia.net

* epel: mirror.horizon.vn

* extras: centos.excellmedia.net

* remi: mirror.awanti.com

* remi-safe: mirror.awanti.com

* updates: centos.excellmedia.net

epel 12780/12780

Resolving Dependencies

--> Running transaction check

---> Package redis.x86_64 0:5.0.3-1.el7.remi will be installed

--> Finished Dependency Resolution

Installing:

redis x86_64 5.0.3-1.el7.remi remi 919 k

Install 1 Package

Total download size: 919 k

Installed size: 3.0 M

Is this ok [y/d/N]: y

Downloading packages:

warning: /var/cache/yum/x86_64/7/remi/packages/redis-5.0.3-1.el7.remi.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID 00f97f56: NOKEY] 126 kB/s | 908 kB 00:00:00 ETA

Public key for redis-5.0.3-1.el7.remi.x86_64.rpm is not installed

redis-5.0.3-1.el7.remi.x86_64.rpm | 919 kB 00:00:08

Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-remi

Importing GPG key 0x00F97F56:

Userid : "Remi Collet <RPMS@FamilleCollet.com>"

Fingerprint: 1ee0 4cce 88a4 ae4a a29a 5df5 004e 6f47 00f9 7f56

Package : remi-release-7.6-1.el7.remi.noarch (installed)

From : /etc/pki/rpm-gpg/RPM-GPG-KEY-remi

Is this ok [y/N]: y

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Installing : redis-5.0.3-1.el7.remi.x86_64 1/1

Verifying : redis-5.0.3-1.el7.remi.x86_64 1/1

Installed:

redis.x86_64 0:5.0.3-1.el7.remi

Complete!

Once installation is completed we need to start redis service and enable the service at the startup mode and check the status of the service using the below commands.

[root@localhost ~]# systemctl start redis

[root@localhost ~]# systemctl enable redis

Created symlink from /etc/systemd/system/multi-user.target.wants/redis.service to /usr/lib/systemd/system/redis.service.

[root@localhost ~]# systemctl status redis

● redis.service - Redis persistent key-value database

Loaded: loaded (/usr/lib/systemd/system/redis.service; enabled; vendor preset: disabled)

Drop-In: /etc/systemd/system/redis.service.d

└─limit.conf

Active: active (running) since Tue 2019-01-01 20:49:29 IST; 1min 27s ago

Main PID: 1259 (redis-server)

CGroup: /system.slice/redis.service

└─1259 /usr/bin/redis-server 127.0.0.1:6379

Jan 01 20:49:29 localhost.localdomain systemd[1]: Starting Redis persistent key-value database...

Jan 01 20:49:29 localhost.localdomain systemd[1]: Started Redis persistent key-value database.

How to install and configure redis on CentOS 7 step by step guide

Configure redis to access remotely

By default we can not access redis remotely. We can only access redis using localhost ip (127.0.0.1) in which redis is installed. To access redis remotely we need to configure , to configure it we need to go redis config file which is located at “/etc/redis.conf”.

[root@localhost ~]# vi /etc/redis.conf

And modify the below line

# IF YOU ARE SURE YOU WANT YOUR INSTANCE TO LISTEN TO ALL THE INTERFACES

# JUST COMMENT THE FOLLOWING LINE.

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

bind 127.0.0.1 192.168.137.6

After modify the file we need to restart the redis service by using the below command.

[root@localhost ~]# systemctl restart redis

Redis service is working 6379 port. Redis service pot is listening or not we can verify using the below command.

[root@localhost ~]# ss -tulpn | grep 6379

tcp LISTEN 0 128 192.168.137.6:6379

tcp LISTEN 0 128 127.0.0.1:6379

Now we need to the allow the port 6379 if you use the firewalld.

Reference Read: https://techrideradmin.blogspot.com/2018/10/iptables-firewall-rule-chains-configuration-guide-on-linux-with-examples-for-beginners.html

To verify redis is successfully configured or not on centos server for this we execute the below command.

[root@localhost ~]# redis-cli -h 192.168.137.6 ping

After excuting the above command we will get the below output.

PONG

That’s all we have configured redis on CentOS 7.If this article is helpful please share it!!!!!!!!!

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How to install and configure redis on CentOS 7 step by step guide