mirror of https://github.com/docker/docs.git
248 lines
8.1 KiB
Markdown
248 lines
8.1 KiB
Markdown
---
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description: Learn how to install Docker Engine on CentOS. These instructions cover the different installation methods, how to uninstall, and next steps.
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keywords: install docker centos, centos install docker, docker install centos, yum install docker, install docker centos 7, install docker centos 8, centos docker-ce
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redirect_from:
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- /ee/docker-ee/centos/
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- /engine/installation/centos/
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- /engine/installation/linux/centos/
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- /engine/installation/linux/docker-ce/centos/
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- /engine/installation/linux/docker-ee/centos/
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- /install/linux/centos/
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- /install/linux/docker-ce/centos/
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- /install/linux/docker-ee/centos/
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title: Install Docker Engine on CentOS
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toc_max: 4
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---
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To get started with Docker Engine on CentOS, make sure you
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[meet the prerequisites](#prerequisites), and then follow the
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[installation steps](#installation-methods).
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## Prerequisites
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### OS requirements
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To install Docker Engine, you need a maintained version of one of the following
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CentOS versions:
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- CentOS 7
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- CentOS 8 (stream)
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- CentOS 9 (stream)
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The `centos-extras` repository must be enabled. This repository is enabled by
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default, but if you have disabled it, you need to
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[re-enable it](https://wiki.centos.org/AdditionalResources/Repositories){: target="_blank" rel="noopener" class="_" }.
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### Uninstall old versions
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Older versions of Docker went by the names of `docker` or `docker-engine`.
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Uninstall any such older versions before attempting to install a new version,
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along with associated dependencies.
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```console
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$ sudo yum remove docker \
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docker-client \
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docker-client-latest \
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docker-common \
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docker-latest \
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docker-latest-logrotate \
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docker-logrotate \
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docker-engine
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```
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`yum` might report that you have none of these packages installed.
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Images, containers, volumes, and networks stored in `/var/lib/docker/` aren't
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automatically removed when you uninstall Docker.
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## Installation methods
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You can install Docker Engine in different ways, depending on your needs:
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- You can
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[set up Docker's repositories](#install-using-the-repository) and install
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from them, for ease of installation and upgrade tasks. This is the
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recommended approach.
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- You can download the RPM package and
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[install it manually](#install-from-a-package) and manage
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upgrades completely manually. This is useful in situations such as installing
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Docker on air-gapped systems with no access to the internet.
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- In testing and development environments, you can use automated
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[convenience scripts](#install-using-the-convenience-script) to install Docker.
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### Install using the rpm repository {#install-using-the-repository}
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Before you install Docker Engine for the first time on a new host machine, you
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need to set up the Docker repository. Afterward, you can install and update
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Docker from the repository.
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#### Set up the repository
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{% assign download-url-base = "https://download.docker.com/linux/centos" %}
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Install the `yum-utils` package (which provides the `yum-config-manager`
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utility) and set up the repository.
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```console
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$ sudo yum install -y yum-utils
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$ sudo yum-config-manager --add-repo {{ download-url-base }}/docker-ce.repo
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```
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#### Install Docker Engine
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1. Install Docker Engine, containerd, and Docker Compose:
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<ul class="nav nav-tabs">
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<li class="active"><a data-toggle="tab" data-target="#tab-latest">Latest</a></li>
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<li><a data-toggle="tab" data-target="#tab-version">Specific version</a></li>
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</ul>
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<div class="tab-content">
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<br>
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<div id="tab-latest" class="tab-pane fade in active" markdown="1">
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To install the latest version, run:
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```console
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$ sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
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```
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If prompted to accept the GPG key, verify that the fingerprint matches
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`060A 61C5 1B55 8A7F 742B 77AA C52F EB6B 621E 9F35`, and if so, accept it.
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This command installs Docker, but it doesn't start Docker. It also creates a
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`docker` group, however, it doesn't add any users to the group by default.
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</div>
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<div id="tab-version" class="tab-pane fade" markdown="1">
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To install a specific version, start by listing the available versions in
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the repository:
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```console
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$ yum list docker-ce --showduplicates | sort -r
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docker-ce.x86_64 3:24.0.0-1.el8 docker-ce-stable
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docker-ce.x86_64 3:23.0.6-1.el8 docker-ce-stable
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<...>
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```
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The list returned depends on which repositories are enabled, and is specific
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to your version of CentOS (indicated by the `.el8` suffix in this example).
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Install a specific version by its fully qualified package name, which is
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the package name (`docker-ce`) plus the version string (2nd column),
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separated by a hyphen (`-`). For example, `docker-ce-3:24.0.0-1.el8`.
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Replace `<VERSION_STRING>` with the desired version and then run the following
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command to install:
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```console
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$ sudo yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io docker-buildx-plugin docker-compose-plugin
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```
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This command installs Docker, but it doesn't start Docker. It also creates a
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`docker` group, however, it doesn't add any users to the group by default.
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</div>
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<hr>
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</div>
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2. Start Docker.
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```console
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$ sudo systemctl start docker
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```
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3. Verify that the Docker Engine installation is successful by running the
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`hello-world` image.
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```console
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$ sudo docker run hello-world
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```
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This command downloads a test image and runs it in a container. When the
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container runs, it prints a confirmation message and exits.
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You have now successfully installed and started Docker Engine.
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{% include root-errors.md %}
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#### Upgrade Docker Engine
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To upgrade Docker Engine, follow the [installation instructions](#install-using-the-repository),
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choosing the new version you want to install.
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### Install from a package
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If you can't use Docker's `rpm` repository to install Docker Engine, you can
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download the `.rpm` file for your release and install it manually. You need to
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download a new file each time you want to upgrade Docker Engine.
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1. Go to [{{ download-url-base }}/]({{ download-url-base }}/){: target="_blank" rel="noopener" class="_" }
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and choose your version of CentOS. Then browse to `x86_64/stable/Packages/`
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and download the `.rpm` file for the Docker version you want to install.
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2. Install Docker Engine, changing the path below to the path where you downloaded
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the Docker package.
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```console
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$ sudo yum install /path/to/package.rpm
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```
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Docker is installed but not started. The `docker` group is created, but no
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users are added to the group.
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3. Start Docker.
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```console
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$ sudo systemctl start docker
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```
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4. Verify that the Docker Engine installation is successful by running the
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`hello-world` image.
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```console
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$ sudo docker run hello-world
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```
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This command downloads a test image and runs it in a container. When the
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container runs, it prints a confirmation message and exits.
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You have now successfully installed and started Docker Engine.
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{% include root-errors.md %}
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#### Upgrade Docker Engine
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To upgrade Docker Engine, download the newer package files and repeat the
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[installation procedure](#install-from-a-package), using `yum -y upgrade`
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instead of `yum -y install`, and point to the new files.
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{% include install-script.md %}
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## Uninstall Docker Engine
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1. Uninstall the Docker Engine, CLI, containerd, and Docker Compose packages:
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```console
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$ sudo yum remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras
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```
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2. Images, containers, volumes, or custom configuration files on your host
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aren't automatically removed. To delete all images, containers, and volumes:
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```console
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$ sudo rm -rf /var/lib/docker
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$ sudo rm -rf /var/lib/containerd
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```
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You have to delete any edited configuration files manually.
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## Next steps
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- Continue to [Post-installation steps for Linux](linux-postinstall.md).
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- Review the topics in [Develop with Docker](../../develop/index.md) to learn
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how to build new applications using Docker.
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