Docker Getting started with Docker Installating Docker-ce OR Docker-ee on CentOS

Example

Docker has announced following editions:

-Docker-ee (Enterprise Edition) along with Docker-ce(Community Edition) and Docker (Commercial Support)

This document will help you with installation steps of Docker-ee and Docker-ce edition in CentOS

Docker-ce Installation

Following are steps to install docker-ce edition

1. Install yum-utils, which provides yum-config-manager utility:

   $ sudo yum install -y yum-utils

2. Use the following command to set up the stable repository:

   $ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

3. Optional: Enable the edge repository. This repository is included in the docker.repo file above but is disabled by default. You can enable it alongside the stable repository.

    $ sudo yum-config-manager --enable docker-ce-edge 

• You can disable the edge repository by running the yum-config-manager command with the --disable flag. To re-enable it, use the --enable flag. The following command disables the edge repository.

   $ sudo yum-config-manager --disable docker-ce-edge 

4. Update the yum package index.

    $ sudo yum makecache fast 

5. Install the docker-ce using following command:

    $ sudo yum install docker-ce-17.03.0.ce 

6. Confirm the Docker-ce fingerprint

   060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35

   If you want to install some other version of docker-ce you can use following command:

   $ sudo yum install docker-ce-VERSION

   Specify the VERSION number

7. If everything went well the docker-ce is now installed in your system, use following command to start:

    $ sudo systemctl start docker 

8. Test your docker installation:

    $ sudo docker run hello-world 

   you should get following message:

    Hello from Docker! 
    This message shows that your installation appears to be working correctly. 

---

-Docker-ee (Enterprise Edition) Installation

For Enterprise Edition (EE) it would be required to signup, to get your <DOCKER-EE-URL>.

1. To signup go to https://cloud.docker.com/. Enter your details and confirm your email id. After confirmation you would be given a <DOCKER-EE-URL>, which you can see in your dashboard after clicking on setup.

2. Remove any existing Docker repositories from /etc/yum.repos.d/

3. Store your Docker EE repository URL in a yum variable in /etc/yum/vars/. Replace <DOCKER-EE-URL> with the URL you noted down in the first step.

    $ sudo sh -c 'echo "<DOCKER-EE-URL>" > /etc/yum/vars/dockerurl' 

4. Install yum-utils, which provides the yum-config-manager utility:

    $ sudo yum install -y yum-utils

5. Use the following command to add the stable repository:

    $ sudo yum-config-manager \
    --add-repo \
    <DOCKER-EE-URL>/docker-ee.repo

6. Update the yum package index.

    $ sudo yum makecache fast 

7. Install docker-ee

    sudo yum install docker-ee 

8. You can start the docker-ee using following command:

   $ sudo systemctl start docker