How to install docker on Redhat Linux (RHEL) and CentOS? How to setup the docker environment to start the first container to start exploring the container world? In this article, we are going to demonstrate the docker community edition deployment on RHEL/CentOS. We will also launch the Docker containers to test the deployment.

Mar 02, 2017 For consistency, we are also renaming the free Docker products to Docker Community Edition (CE) and adopting a new lifecycle and time-based versioning scheme for both Docker EE and CE. Today’s Docker CE and EE 17.03 release is the first to use the new scheme. Docker CE and EE are released quarterly, and CE also has a monthly “Edge” option. Jun 16, 2018 Error: Package: docker-ce-18.03.1.ce-1.el7.centos.x8664 (docker-ce-stable) Requires: container-selinux = 2.9 You could try using –skip-broken to work around the problem You could try running: rpm -Va –nofiles –nodigest. To fix above mentioned error, Redhat Linux (RHEL 7) requires extra rpms. Enable the extras RHEL repository.

Docker Editions

• Docker Community Edition (CE) – Free, Community supported and Do it yourself model.

Docker Community Edition

• Docker Enterprise Edition – Supported by docker and it’s Paid version

Install Docker Ce On Rhel 80

Docker glossary

• Docker Image: Docker images are the basis of containers. An Image is an ordered collection of root filesystem changes and the corresponding execution parameters for use within a container runtime. An image typically contains a union of layered filesystems stacked on top of each other. An image does not have state and it never changes.
• Docker container: A container is a runtime instance of a docker image.
• Docker registry: A Registry is a hosted service containing repositories of images which response to the Registry API. The default registry can be accessed using a browser at Docker Hub or using the docker search command.

Pre-requisites:

1. Docker supports only x86_64 (64-bit architecture). It also required Linux kernel version 3.8 and above. You could verify the system architecture and kernel version using the following command.

2. Ensure that system is installed with following packages.

• device-mapper-libs
• device-mapper
• lvm2-libs
• lvm2
• device-mapper-persistent-data
• yum-utils

If not, please install the missing packages using yum command.

Setting up the Docker Repository:

Configure the docker repository by pulling the repo file form docker website and save it in /etc/yum.repos.d directory. The following command does all the actions for you.

Note: Docker community edition is not available for RHEL. However, Docker provides the community edition for Centos which also can be installed on RHEL. But it’s unsupported.

Installing Docker:

Once the repo is configured successfully, we are good to install docker community edition.

You might get following errors on Redhat Enterprise Linux (RHEL)

Error: Package: docker-ce-18.03.1.ce-1.el7.centos.x86_64 (docker-ce-stable)
Requires: pigz
Error: Package: docker-ce-18.03.1.ce-1.el7.centos.x86_64 (docker-ce-stable)
Requires: container-selinux >= 2.9
You could try using –skip-broken to work around the problem
You could try running: rpm -Va –nofiles –nodigest

To fix above mentioned error,

Redhat Linux (RHEL 7) requires extra rpms. Enable the extras RHEL repository. This ensures access to the container-selinux package which is required by docker-ce. It requires a Red hat subscription.

Start the Docker service

Once the installation is done, you need to start the docker service manually.

To start the docker service on startup,

Install Docker Ce On Rhel 7

Verify the docker Installation:

The most common way to test the docker is, running image “hello-world” .

Install Docker Ce On Rhel 8 Default

We have successfully installed docker community edition on RHEL/CentOS.