How To Install Docker In RHEL ?

Docker is a well-known platform that empowers engineers to build, ship, and run applications in containers, giving consistency across various conditions. Introducing Docker on Red Hat enterprise Linux (RHEL) is a direct interaction that improves the effectiveness of programming software improvement and deployment organization.

Red Hat Enterprise Linux (RHEL) is a commercial Linux distribution developed by Red Hat for the commercial market. It is known for its stability, security, and support, making it a popular choice for enterprises seeking a reliable operating system for their IT infrastructure. Here are some key features and characteristics of RHEL:

The installation process of Docker on RHEL includes several stages: refreshing the framework, adding the Docker storehouse, and introducing Docker People Group Release (CE). Once introduced, Docker can be begun and designed to run on framework boot. Moreover, client authorizations can be changed in accordance with permitting non-root clients to run Docker orders, working on its utilization.

Understanding of primary terminologies

What is docker?

Docker is an open-source platform designed to automate the deployment, scaling, and management of applications within lightweight, portable containers. Docker is a platform where we can pack our source code as images and ship it into containers then we can run our application in any environment that is an independent platform.

whereas Docker uses containerization technology to provide a more efficient and flexible alternative to traditional virtual machines. Unlike virtual machines, which include a full operating system, Docker containers share the host system's OS kernel and isolate the application processes from one another. This results in significantly reduced overhead, faster startup times, and better resource utilization.

Docker's ecosystem includes several key components:

• Docker Engine: The core service that runs and manages containers.
• Docker Hub: A cloud-based registry service for sharing and storing container images.
• Docker-Compose: A tool for defining and running multi-container Docker applications using a YAML file.

What is Red Hat Enterprise Linux (RHEL) RHEL?

Red Hat Enterprise Linux (RHEL) is a commercial, enterprise-grade operating system developed by Red Hat for businesses and organizations. It is based on the open-source Fedora project and provides a stable, secure, and high-performance platform for a wide range of applications, from small-scale deployments to large data centers.

Key aspects of RHEL:

Stability and Reliability:

RHEL is known for its robustness and stability, making it a preferred choice for mission-critical environments. Red Hat provides long-term support and regular updates, ensuring reliability over the lifecycle of the OS.

Security:

RHEL includes advanced security features such as SELinux (Security-Enhanced Linux), which provides mandatory access controls, and integrated tools for compliance and vulnerability management. Red Hat also offers timely security patches and updates.

Performance:

RHEL is optimized for performance, supporting various hardware architectures and providing tools for performance tuning and monitoring. It is designed to efficiently handle demanding workloads.

Step by Step Process Install Docker in RHEL

Step 1: Login into AWS Console

• Navigate to AWS management console and login into aws account with your aws credentials.

Step 2: Launch RHEL instance

• After login to the aws management console and search for EC2 and navigate to EC2 dashboard.

ec2 dashboard>instances>Launch instances

• Click on Launch instances and select the listed AMI (Amazon Machine Image) as Redhat

Step 3: Connect the RHEL instance

• connect this RHEL instance through any CLI terminal with SSH command.

ssh -i "key-par.pem file" ec2-user@public-IP address 

• check the OS-version by the below command.

sudo cat /etc/os-release

Step 4: Update the system

• Ensure your system is updated by updating the system we will get some advanced repos and keys related to some packages.
• update the system with command

sudo yum update -y

Step 5:Install required packages

• install the pre-required packages which are related to install the docker.

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

Step 6:Install Docker CE (Community Edition)

• after installing the required packages which are related to docker the install the docker by run the below command.

sudo yum install -y docker-ce docker-ce-cli containerd.io

Step 7:Start and Enable Docker

• we should start the docker and enable the docker because of that we can run run docker docker engine.

sudo systemctl start docker
sudo systemctl enable docker

• we can also check the version of the docker.

sudo docker --version

Post-Installation docker Steps

Step 8:Run Docker without sudo

• To run Docker commands without needing to prefix them with sudo, you can add your user to the docker group.
• here i mention the user-name as ec2-user by default RHEL user is ec2-user.

sudo usermod -aG docker $USER

Log out and log back in for the group change to take effect, or use the following command to refresh your group membership

newgrp docker

Test Docker Installation

• we can check the docker installation whether it is successfully installed and run efficiently
• Run a test container to verify Docker is working correctly.

sudo docker run <docker image name>