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Instructions for installing Docker CE on CentOS requirements, apt, installation, centos, rpm, install, uninstall, upgrade, update
/engine/installation/centos/
/engine/installation/linux/docker-ce/centos/
/install/linux/centos/
/engine/installation/linux/centos/
Get Docker CE for CentOS 4

To get started with Docker CE on CentOS, make sure you meet the prerequisites, then install Docker.

Prerequisites

Docker EE customers

To install Docker Enterprise Edition (Docker EE), go to Get Docker EE for CentOS instead of this topic.

To learn more about Docker EE, see Docker Enterprise Edition{: target="blank" class="" }.

OS requirements

To install Docker CE, you need a maintained version of CentOS 7. Archived versions aren't supported or tested.

The centos-extras repository must be enabled. This repository is enabled by default, but if you have disabled it, you need to re-enable it{: target="blank" class="" }.

The overlay2 storage driver is recommended.

Uninstall old versions

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them, along with associated dependencies.

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

It's OK if yum reports that none of these packages are installed.

The contents of /var/lib/docker/, including images, containers, volumes, and networks, are preserved. The Docker CE package is now called docker-ce.

Install Docker CE

You can install Docker CE in different ways, depending on your needs:

  • Most users set up Docker's repositories and install from them, for ease of installation and upgrade tasks. This is the recommended approach.

  • Some users download the RPM package and install it manually and manage upgrades completely manually. This is useful in situations such as installing Docker on air-gapped systems with no access to the internet.

  • In testing and development environments, some users choose to use automated convenience scripts to install Docker.

Install using the repository

Before you install Docker CE for the first time on a new host machine, you need to set up the Docker repository. Afterward, you can install and update Docker from the repository.

Set up the repository

{% assign download-url-base = "https://download.docker.com/linux/centos" %}

  1. Install required packages. yum-utils provides the yum-config-manager utility, and device-mapper-persistent-data and lvm2 are required by the devicemapper storage driver.

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

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

    $ sudo yum-config-manager \
    --add-repo \
    {{ download-url-base }}/docker-ce.repo

Optional: Enable the nightly or test repositories.

These repositories are included in the docker.repo file above but are disabled by default. You can enable them alongside the stable repository. The following command enables the nightly repository.

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

To enable the test channel, run the following command:

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

You can disable the nightly or test 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 nightly repository.

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

Learn about nightly and test channels.

Install Docker CE

  1. Install the latest version of Docker CE, or go to the next step to install a specific version:

    $ sudo yum install docker-ce

    If prompted to accept the GPG key, verify that the fingerprint matches 060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35, and if so, accept it.

    Got multiple Docker repositories?

    If you have multiple Docker repositories enabled, installing or updating without specifying a version in the yum install or yum update command always installs the highest possible version, which may not be appropriate for your stability needs.

    Docker is installed but not started. The docker group is created, but no users are added to the group.

  2. To install a specific version of Docker CE, list the available versions in the repo, then select and install:

    a. List and sort the versions available in your repo. This example sorts results by version number, highest to lowest, and is truncated:

    $ yum list docker-ce --showduplicates | sort -r

docker-ce.x86_64  3:18.09.1-3.el7                     docker-ce-stable
docker-ce.x86_64  3:18.09.0-3.el7                     docker-ce-stable
docker-ce.x86_64  18.06.1.ce-3.el7                    docker-ce-stable
docker-ce.x86_64  18.06.0.ce-3.el7                    docker-ce-stable

    The list returned depends on which repositories are enabled, and is specific to your version of CentOS (indicated by the .el7 suffix in this example).

    b. Install a specific version by its fully qualified package name, which is the package name (docker-ce) plus the version string (2nd column) starting at the first colon (:), up to the first hyphen, separated by a hyphen (-). For example, docker-ce-18.09.1.

    $ sudo yum install docker-ce-<VERSION STRING>

    Docker is installed but not started. The docker group is created, but no users are added to the group.

  3. Start Docker.

    $ sudo systemctl start docker

  4. Verify that Docker CE is installed correctly by running the hello-world image.

    $ sudo docker run hello-world

    This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.

Docker CE is installed and running. You need to use sudo to run Docker commands. Continue to Linux postinstall to allow non-privileged users to run Docker commands and for other optional configuration steps.

Upgrade Docker CE

To upgrade Docker CE, follow the installation instructions, choosing the new version you want to install.

Install from a package

If you cannot use Docker's repository to install Docker, you can download the .rpm file for your release and install it manually. You need to download a new file each time you want to upgrade Docker CE.

  1. Go to [{{ download-url-base }}/7/x86_64/stable/Packages/]({{ download-url-base }}/7/x86_64/stable/Packages/) and download the .rpm file for the Docker version you want to install.

    Note: To install a nightly or test (pre-release) package, change the word stable in the above URL to nightly or test. Learn about nightly and test channels.

  2. Install Docker CE, changing the path below to the path where you downloaded the Docker package.

    $ sudo yum install /path/to/package.rpm

    Docker is installed but not started. The docker group is created, but no users are added to the group.

  3. Start Docker.

    $ sudo systemctl start docker

  4. Verify that Docker CE is installed correctly by running the hello-world image.

    $ sudo docker run hello-world

    This command downloads a test image and runs it in a container. When the container runs, it prints an informational message and exits.

Docker CE is installed and running. You need to use sudo to run Docker commands. Continue to Post-installation steps for Linux to allow non-privileged users to run Docker commands and for other optional configuration steps.

Upgrade Docker CE

To upgrade Docker CE, download the newer package file and repeat the installation procedure, using yum -y upgrade instead of yum -y install, and pointing to the new file.

{% include install-script.md %}

Uninstall Docker CE

  1. Uninstall the Docker package:

    $ sudo yum remove docker-ce

  2. Images, containers, volumes, or customized configuration files on your host are not automatically removed. To delete all images, containers, and volumes:

    $ sudo rm -rf /var/lib/docker

You must delete any edited configuration files manually.

Next steps