mirror of https://github.com/docker/docs.git
331 lines
11 KiB
Markdown
331 lines
11 KiB
Markdown
---
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description: Instructions for installing Docker EE on RHEL
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keywords: requirements, installation, rhel, rpm, install, uninstall, upgrade, update
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redirect_from:
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- /engine/installation/rhel/
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- /installation/rhel/
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- /engine/installation/linux/rhel/
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title: Get Docker EE for Red Hat Enterprise Linux
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---
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To get started with Docker EE on Red Hat Enterprise Linux (RHEL), make sure you
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[meet the prerequisites](#prerequisites), then
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[install Docker](#install-docker-ee).
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## Prerequisites
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Docker Community Edition (Docker CE) is not supported on RHEL.
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### Docker EE repository URL
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To install Docker Enterprise Edition (Docker EE), you need to know the Docker EE
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repository URL associated with your trial or subscription. These instructions
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work for Docker EE for RHEL and for Docker EE for Linux, which includes access
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to Docker EE for all Linux distributions. To get this information:
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- Go to [https://store.docker.com/my-content](https://store.docker.com/my-content).
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- Choose **Get Details** / **Setup Instructions** within the
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**Docker Enterprise Edition for Red Hat Enterprise Linux** section.
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- Copy the URL from the field labeled
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**Copy and paste this URL to download your Edition**.
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Use this URL when you see the placeholder text `<DOCKER-EE-URL>`.
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To learn more about Docker EE, see
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[Docker Enterprise Edition](https://www.docker.com/enterprise-edition/){: target="_blank" class="_" }.
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### OS requirements
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To install Docker EE, you need the 64-bit version of RHEL 7, running on an x86
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hardware platform.
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In addition, you must use the `devicemapper` storage driver. On production
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systems, you must use `direct-lvm` mode, which requires one or more dedicated
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block devices. Fast storage such as solid-state media (SSD) is recommended.
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### Uninstall old versions
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Older versions of Docker were called `docker` or `docker-engine`. If these are
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installed, uninstall them, along with associated dependencies.
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```bash
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$ sudo yum remove docker \
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docker-common \
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docker-selinux \
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docker-engine-selinux
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docker-engine
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```
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It's OK if `yum` reports that none of these packages are installed.
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The contents of `/var/lib/docker/`, including images, containers, volumes, and
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networks, are preserved. The Docker EE package is now called `docker-ee`.
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## Install Docker EE
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You can install Docker EE in different ways, depending on your needs:
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- Most users
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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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- Some users download the RPM package and install it manually 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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### Install using the repository
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Before you install Docker EE for the first time on a new host machine, you need
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to set up the Docker repository. Afterward, you can install and update Docker EE
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from the repository.
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#### Set up the repository
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1. Remove any existing Docker repositories from `/etc/yum.repos.d/`.
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2. Store two `yum` variables in `/etc/yum/vars/`.
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- Store your EE repository URL in `/etc/yum/vars/dockerurl`. Replace
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`<DOCKER-EE-URL>` with the URL you noted down in the
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[prerequisites](#prerequisites).
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```bash
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$ sudo sh -c 'echo "<DOCKER-EE-URL>/rhel" > /etc/yum/vars/dockerurl'
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```
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- Store your RHEL version string in `/etc/yum/vars/dockerosversion`.
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Use the appropriate value from the following table. Most users should use
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`7`.
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| Version string | Description |
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|----------------|-------------|
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| `7` | Unless you have specific requirements, you should use this version. Dependencies are not locked to specific versions but use the latest available version. |
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| `7.3` | Dependencies are locked to specific packages for RHEL 7.3. |
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| `7.2` | Dependencies are locked to specific packages for RHEL 7.2. |
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```bash
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$ sudo sh -c 'echo "<VERSION-STRING>" > /etc/yum/vars/dockerosversion'
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```
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3. Install required packages. `yum-utils` provides the `yum-config-manager`
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utility, and `device-mapper-persistent-data` and `lvm2` are required by the
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`devicemapper` storage driver.
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```bash
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$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2
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```
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4. Enable the `extras` RHEL repository. This ensures access to the
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`container-selinux` package which is required by `docker-ee`.
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```bash
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$ sudo yum-config-manager --enable rhel-7-server-extras-rpms
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```
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Depending on cloud provider, you may also need to enable another repository.
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For AWS:
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```bash
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$ sudo yum-config-manager --enable rhui-REGION-rhel-server-extras
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```
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> **Note**: `REGION` here is literal, and does *not* represent the region
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> your machine is running in.
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For Azure:
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```bash
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$ sudo yum-config-manager --enable rhui-rhel-7-server-rhui-extras-rpms
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```
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5. Use the following command to add the **stable** repository:
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```bash
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$ sudo yum-config-manager \
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--add-repo \
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<DOCKER-EE-URL>/rhel/docker-ee.repo
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```
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#### Install Docker EE
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1. Update the `yum` package index.
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```bash
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$ sudo yum makecache fast
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```
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If this is the first time you have refreshed the package index since adding
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the Docker repositories, you will be prompted to accept the GPG key, and
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the key's fingerprint will be shown. Verify that the fingerprint matches
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`DD91 1E99 5A64 A202 E859 07D6 BC14 F10B 6D08 5F96` and if so, accept the
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key.
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2. Install the latest version of Docker EE, or go to the next step to install a
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specific version.
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```bash
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$ sudo yum -y install docker-ee
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```
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3. On production systems, you should install a specific version of Docker EE
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instead of always using the latest. List the available versions.
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This example uses the `sort -r` command to sort the results by version
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number, highest to lowest, and is truncated.
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> **Note**: This `yum list` command only shows binary packages. To show
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> source packages as well, omit the `.x86_64` from the package name.
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{% assign minor-version = "17.03" %}
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```bash
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$ yum list docker-ee.x86_64 --showduplicates | sort -r
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docker-ee.x86_64 {{ minor-version }}.0.el7 docker-ee-stable
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```
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The contents of the list depend upon which repositories you have enabled,
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and will be specific to your version of RHEL (indicated by the `.el7` suffix
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on the version, in this example). Choose a specific version to install. The
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second column is the version string. The third column is the repository
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name, which indicates which repository the package is from and by extension
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its stability level. To install a specific version, append the
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version string to the package name and separate them by a hyphen (`-`):
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```bash
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$ sudo yum -y install docker-ee-<VERSION_STRING>
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```
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4. Edit `/etc/docker/daemon.json`. If it does not yet exist, create it. Assuming
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that the file was empty, add the following contents.
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```json
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{
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"storage-driver": "devicemapper"
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}
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```
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5. For production systems, you must use `direct-lvm` mode, which requires you
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to prepare the block devices. Follow the procedure in the
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[devicemapper storage driver guide](/engine/userguide/storagedriver/device-mapper-driver.md#configure-direct-lvm-mode-for-production){: target="_blank" class="_" }
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**before starting Docker**.
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6. Start Docker.
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```bash
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$ sudo systemctl start docker
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```
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7. Verify that Docker EE is installed correctly by running the `hello-world`
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image.
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```bash
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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 an informational message and exits.
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Docker EE is installed and running. You need to use `sudo` to run Docker
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commands. Continue to [Linux postinstall](linux-postinstall.md) to allow
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non-privileged users to run Docker commands and for other optional configuration
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steps.
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#### Upgrade Docker EE
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To upgrade Docker EE, first run `sudo yum makecache fast`, then follow the
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[installation instructions](#install-docker), choosing the new version you want
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to install.
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### Install from a package
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If you cannot use the official Docker repository to install Docker EE, you can
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download the `.rpm` file for your release and install it manually. You will
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need to download a new file each time you want to upgrade Docker EE.
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1. Go to the Docker EE repository URL associated with your
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trial or subscription in your browser. Go to
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`rhel/7/x86_64/stable-{{ minor-version }}/Packages` and download the `.rpm`
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file for the Docker version you want to install.
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> **Note**: If you have trouble with `selinux` using the packages under the
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> `7` directory, try choosing the version-specific directory instead, such
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> as `7.3`.
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2. Install Docker EE, changing the path below to the path where you downloaded
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the Docker package.
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```bash
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$ sudo yum install /path/to/package.rpm
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```
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3. Edit `/etc/docker/daemon.json`. If it does not yet exist, create it. Assuming
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that the file was empty, add the following contents.
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```json
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{
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"storage-driver": "devicemapper"
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}
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```
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4. For production systems, you must use `direct-lvm` mode, which requires you
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to prepare the block devices. Follow the procedure in the
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[devicemapper storage driver guide](/engine/userguide/storagedriver/device-mapper-driver.md#configure-direct-lvm-mode-for-production){: target="_blank" class="_" }
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**before starting Docker**.
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5. Start Docker.
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```bash
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$ sudo systemctl start docker
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```
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6. Verify that Docker EE is installed correctly by running the `hello-world`
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image.
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```bash
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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 an informational message and exits.
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Docker EE is installed and running. You need to use `sudo` to run Docker
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commands. Continue to [Post-installation steps for Linux](linux-postinstall.md)
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to allow non-privileged users to run Docker commands and for other optional
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configuration steps.
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#### Upgrade Docker EE
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To upgrade Docker EE, download the newer package file 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 pointing to the new file.
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## Uninstall Docker EE
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1. Uninstall the Docker EE package:
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```bash
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$ sudo yum -y remove docker-ee
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```
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2. Images, containers, volumes, or customized configuration files on your host
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are not automatically removed. To delete all images, containers, and
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volumes:
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```bash
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$ sudo rm -rf /var/lib/docker
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```
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3. If desired, remove the `devicemapper` thin pool and reformat the block
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devices that were part of it.
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You must delete any edited configuration files manually.
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## Next steps
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- Continue to [Post-installation steps for Linux](/engine/installation/linux/linux-postinstall.md)
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- Continue with the [User Guide](/engine/userguide/index.md).
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