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Instructions for installing Docker CE on Ubuntu

requirements, apt, installation, ubuntu, install, uninstall, upgrade, update

/engine/installation/ubuntulinux/

/installation/ubuntulinux/

/engine/installation/linux/ubuntulinux/

Get Docker CE for Ubuntu

To get started with Docker CE on Ubuntu, 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 Ubuntu 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 the 64-bit version of one of these Ubuntu versions:

Zesty 17.04
Xenial 16.04 (LTS)
Trusty 14.04 (LTS)

Docker CE is supported on Ubuntu on x86_64, armhf, and s390x (IBM z Systems) architectures.

s390x limitations: System Z is only supported on Ubuntu Xenial and Zesty.

Uninstall old versions

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them:

$ sudo apt-get remove docker docker-engine docker.io

It's OK if apt-get 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.

Recommended extra packages for Trusty 14.04

Unless you have a strong reason not to, install the linux-image-extra-* packages, which allow Docker to use the aufs storage drivers.

$ sudo apt-get update

$ sudo apt-get install \
    linux-image-extra-$(uname -r) \
    linux-image-extra-virtual

For Ubuntu 16.04 and higher, the Linux kernel includes support for OverlayFS, and Docker CE will use the overlay2 storage driver by default.

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 DEB 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/ubuntu" %}

Update the apt package index:
```
$ sudo apt-get update
```

Install packages to allow apt to use a repository over HTTPS:

$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common

Add Docker's official GPG key:

$ curl -fsSL {{ download-url-base }}/gpg | sudo apt-key add -

Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.

$ sudo apt-key fingerprint 0EBFCD88

pub   4096R/0EBFCD88 2017-02-22
      Key fingerprint = 9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid                  Docker Release (CE deb) <docker@docker.com>
sub   4096R/F273FCD8 2017-02-22

Use the following command to set up the stable repository. You always need the stable repository, even if you want to install builds from the edge or test repositories as well. To add the edge or test repository, add the word edge or test (or both) after the word stable in the commands below.

Note: The lsb_release -cs sub-command below returns the name of your Ubuntu distribution, such as xenial. Sometimes, in a distribution like Linux Mint, you might have to change $(lsb_release -cs) to your parent Ubuntu distribution. For example, if you are using Linux Mint Rafaela, you could use trusty.

amd64:
```
$ sudo add-apt-repository \
   "deb [arch=amd64] {{ download-url-base }} \
   $(lsb_release -cs) \
   stable"
```
armhf:
```
$ sudo add-apt-repository \
   "deb [arch=armhf] {{ download-url-base }} \
   $(lsb_release -cs) \
   stable"
```
s390x:
```
$ sudo add-apt-repository \
   "deb [arch=s390x] {{ download-url-base }} \
   $(lsb_release -cs) \
   stable"
```
Note: Starting with Docker 17.06, stable releases are also pushed to the edge and test repositories.

Learn about stable and edge channels.

Install Docker CE

Update the apt package index.
```
$ sudo apt-get update
```
Install the latest version of Docker CE, or go to the next step to install a specific version. Any existing installation of Docker is replaced.
```
$ sudo apt-get install docker-ce
```
Got multiple Docker repositories?

If you have multiple Docker repositories enabled, installing or updating without specifying a version in the apt-get install or apt-get update command will always install the highest possible version, which may not be appropriate for your stability needs. {:.warning-vanilla}
On production systems, you should install a specific version of Docker CE instead of always using the latest. This output is truncated. List the available versions.
```
$ apt-cache madison docker-ce

docker-ce | {{ site.docker_ce_stable_version }}.0~ce-0~ubuntu | {{ download-url-base }} xenial/stable amd64 Packages
```
The contents of the list depend upon which repositories are enabled. Choose a specific version to install. The second column is the version string. The third column is the repository name, which indicates which repository the package is from and by extension its stability level. To install a specific version, append the version string to the package name and separate them by an equals sign (=):
```
$ sudo apt-get install docker-ce=<VERSION>
```
The Docker daemon starts automatically.
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, first run sudo apt-get update, then 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 CE, you can download the .deb file for your release and install it manually. You will need to download a new file each time you want to upgrade Docker CE.

Go to [{{ download-url-base }}/dists/]({{ download-url-base }}/dists/), choose your Ubuntu version, browse to pool/stable/ and choose amd64, armhf, or s390x. Download the .deb file for the Docker version you want to install.

Note: To install an edge package, change the word stable in the URL to edge. Learn about stable and edge channels.
Install Docker CE, changing the path below to the path where you downloaded the Docker package.
```
$ sudo dpkg -i /path/to/package.deb
```
The Docker daemon starts automatically.
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, pointing to the new file.

{% include install-script.md %}

Uninstall Docker CE

Uninstall the Docker CE package:
```
$ sudo apt-get purge docker-ce
```
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

Continue to Post-installation steps for Linux
Continue with the User Guide.

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Prerequisites

Docker EE customers

OS requirements

Uninstall old versions

Recommended extra packages for Trusty 14.04

Install Docker CE

Install using the repository

Set up the repository

Install Docker CE

Upgrade Docker CE

Install from a package

Upgrade Docker CE

Uninstall Docker CE

Next steps

9.6 KiB

Raw Blame History