How to Install Redis Server Using Docker Container

Redis is a free, open-source, and in-memory key-value store that allows data to be stored and accessed at lightning-fast speeds. It can handle large datasets and maintain high availability. Generally, it is used for database, messaging, and caching functions. Running Redis in a Docker container can significantly shorten and simplify the deployment process.

In this post, we will show you how to install Redis using a Docker container.

In This Article

• Install Docker CE
• Download Redis Image
• Create a Redis Container
• Check CPU Usage with iostat Command
• Check CPU Usage with vmstat Command

Step 1 – Install Docker CE

Before starting, Docker CE must be installed on your server. If not installed, you can install it by following the below steps.

First, update your OS, then add the Docker CE repo with the following commands:

dnf update -y

dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

Once the Docker CE repo is created, run the following command to start the installation:

dnf install docker-ce -y

Once the Docker CE is installed, start the Docker service and enable it to start at system reboot:

systemctl start docker
systemctl enable docker

Also Read

How to Install and Use Docker on CentOS 8

Step 2 – Download Redis Image

First, you will need to download the Redis image from the Docker Hub registry. You can download it with the following command:

docker pull redis

You will get the following output:

Using default tag: latest
latest: Pulling from library/redis
5eb5b503b376: Pull complete 
6530a7ea3479: Pull complete 
91f5202c6d9b: Pull complete 
9f1ac212e389: Pull complete 
82c311187b72: Pull complete 
da84aa65ce64: Pull complete 
Digest: sha256:0d9c9aed1eb385336db0bc9b976b6b49774aee3d2b9c2788a0d0d9e239986cb3
Status: Downloaded newer image for redis:latest
docker.io/library/redis:latest

Once the Redis image is downloaded, verify the downloaded image using the following command:

docker images

You will get the following output:

REPOSITORY   TAG       IMAGE ID       CREATED       SIZE
redis        latest    f1b6973564e9   5 days ago    113MB

Step 3 – Create a Redis Container

At this point, the Redis image is downloaded to your local system. You can now start a Redis container using the following command:

docker run -it --name redis-container -d redis

Once the Redis container is created, you can check it with the following command:

docker ps

You will get the following output:

CONTAINER ID   IMAGE         COMMAND                  CREATED         STATUS         PORTS       NAMES
64163c8ed78d   redis         "docker-entrypoint.s…"   3 seconds ago   Up 2 seconds   6379/tcp    redis-container

You can also see the Redis container log using the following command:

docker logs redis-container

You will get the following output:

                _._                                                  
           _.-``__ ''-._                                             
      _.-``    `.  `_.  ''-._           Redis 6.2.6 (00000000/0) 64 bit
  .-`` .-```.  ```\/    _.,_ ''-._                                  
 (    '      ,       .-`  | `,    )     Running in standalone mode
 |`-._`-...-` __...-.``-._|'` _.-'|     Port: 6379
 |    `-._   `._    /     _.-'    |     PID: 1
  `-._    `-._  `-./  _.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |           https://redis.io       
  `-._    `-._`-.__.-'_.-'    _.-'                                   
 |`-._`-._    `-.__.-'    _.-'_.-'|                                  
 |    `-._`-._        _.-'_.-'    |                                  
  `-._    `-._`-.__.-'_.-'    _.-'                                   
      `-._    `-.__.-'    _.-'                                       
          `-._        _.-'                                           
              `-.__.-'                                               

1:M 01 Feb 2022 07:08:44.564 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 01 Feb 2022 07:08:44.564 # Server initialized
1:M 01 Feb 2022 07:08:44.564 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
1:M 01 Feb 2022 07:08:44.564 * Ready to accept connections

Step 4 – Connect to Redis Container

If you want to connect to the Redis container, run the following command:

docker exec -it redis-container bash

Once you are connected, you will get the following shell:

root@64163c8ed78d:/data#

Next, run the following command to connect to the Redis command-line interface:

root@64163c8ed78d:/data# redis-cli

Now, run the following command to check Redis:

127.0.0.1:6379> ping

If everything is fine, you will get the following output:

PONG

Now, exit from the Redis container using the following command:

127.0.0.1:6379> exit
root@64163c8ed78d:/data# exit

Conclusion

In the above guide, we explained how to install Redis on the Docker container. We also explained how to manage and interact with Redis containers. Try Redis on dedicated servers from Atlantic.Net!