Installation on Linux requires two steps:
- Installation of Docker Engine
- Enabling non-root access
Docker provides a generic installation option using a convenience
script.
Once the Docker Engine has been successfully installed, some post-installation
steps must be taken.
If you prefer not to use the convenience script, Docker provides a
guide to installing
the Docker Engine, with an overview of supported Linux distributions
and pointers to relevant installation information.
Warning: Extra action if you install Docker using
Snap
Snap is an app management system
for linux, popular on Ubuntu and other systems. Docker is available via
Snap. However, if you have installed it using this service you will need
to take the following steps to ensure docker will work properly:
mkdir ~/tmp
export TMPDIR=~/tmp
These commands will let you use docker in the current terminal
instance, but you will have to run “export TMPDIR=~/tmp” in every new
terminal you want to use docker in.
An alternative is to append that command at the end of your bashrc
file with the following command:
echo "export TMPDIR=~/tmp" >> ~/bashrc
This will configure each new instance of a terminal to run that
command at the start of every new terminal instance.
Installation on Windows requires two steps:
- Enabling the Windows Subsystem for Linux.
- Installation of Docker Desktop.
Microsoft publishes a guide
to installing WSL, and Docker provides a guide
for installing Docker Desktop.
We recommend following these guides directly, as they are updated
regularly and provide the most current information.
Note: Please ensure you select the use of WSL2 when
installing Docker Desktop. We recommend using WSL not just for the
Docker backend, but also for the terminal. This will allow you to use
the same commands in this course.
You can also find a summary of the steps below (buyer beware!).
- Open PowerShell as Administrator (“Start menu” > “PowerShell”
> right-click > “Run as Administrator”) and paste the following
commands followed by Enter to install WSL 2:
wsl --update
wsl --install --distribution Ubuntu
To ensure that Ubuntu is the default subsystem instead of
docker-desktop-*, you may need to use:
wsl --set-default Ubuntu
If you had previously installed WSL1 in Windows 10, upgrade to WSL2
with:
wsl --set-version Ubuntu 2
- Reboot your computer. Ubuntu will set itself up after the reboot.
Wait for Ubuntu to ask for a UNIX username and password. After you
provide that information and the command prompt appears. The Ubuntu
window can be closed.
- Then continue to download
Docker Desktop and run the installer. Make sure to select the option
to use WSL2 as the backend.
- Reboot your computer again, and then run Docker Desktop. From the
top menu, choose “Settings” > “Resources” > “WSL Integration”
Under “Enable integration with additional distros”, select “Ubuntu”.
Apply changes and restart.
