Have you ever faced cannot connect to the docker daemon at unix:///var/run/docker.sock. is the docker daemon running? on Windows / WSL? This means you've installed only docker CLI, but docker daemon is still not working.
Windows Subsystem for Linux is a Linux environment that could be installed on Windows 10 machines and then could be used to run Linux binaries. But WSL 1 was too limited to be compatible with the docker daemon as it requires a Linux kernel which was not introduced in WSL 1.
WSL 2 is a brand new environment that supports easy integration with docker host mode because it has a Linux kernel inside. In other words, you don't need stand-alone virtual machines like Virtualbox or VMware and complex setup guides to run docker anymore, docker will work natively here 😊
To install WSL 2 on your Windows 10 Home (or Windows 10 Pro) use this simple WSL 2 setup guide. Before installing docker work then, carefully execute all steps.
Installing Docker on Windows
Get the Docker from the official docker website and install it:
Docker Desktop from Start menu.
WSL Integration. If you had WSL 1 distribution before WSL 2, it might show you
You don't have any WSL 2 distro...:
How to fix "You don't have any WSL 2 distro"
Now configure your WSL distribution to run WSL version 2 (I had 1 by default).
To check the current version, just run in
wsl.exe -l -v
It will show:
C:\Users\Ivan>wsl.exe -l -v NAME STATE VERSION * Ubuntu-18.04 Stopped 1 docker-desktop-data Running 2 docker-desktop Running 2
Ignore docker distributions. The first line holds your real distribution. To set version 2 I executed :
wsl.exe --set-version Ubuntu-18.04 2
Ubuntu-18.04 is the distro name from
wsl -l -v command. It takes a few minutes😐, but don't close the terminal.
When it is finished, click
Apply and Restart 💪:
Enable WSL 2 integration
All is simple, just find your distribution (Ubuntu-18.04 in my case, and turn on the switch)
Run your distro terminal from the start menu:
Now execute 🚀
docker run -d -p 80:80 docker/getting-started
And open https://localhost/ then:
Congratulations, it is working🎉
What should you do if you "cannot connect to the Docker daemon"
If you are receiving some sort of:
- cannot connect to the Docker daemon at unix:///var/run/docker.sock. is the docker daemon running?
- couldn't connect to docker daemon at http+docker://localhost - is it running?
- cannot connect to the Docker daemon
- error: couldn't connect to docker daemon at http+docker://localhost - is it running?
Then it means that the docker daemon not running, so please make sure that your docker daemon is running.
If you would be on non-WSL Linux, you should do:
service docker status
The difference is that on Windows WSL 2, that you should still visit Docker Desktop from the Start menu to make sure the daemon is working.
If you just updated from WSL 1 to WSL 2 or just installed WSL 2 I strongly recommend reading our WSL 2 starter must-read, it has an explanation of super-popular problems and tips which you will most probably face if you are new to WSL 2. In short, docker usage tips consequently flow from the starter guide:
- Please store all sources and volumes inside of the Linux filesystem in WSL. (I.e. Paths from
~/...). For example,
docker run -v ~/proj:/sources <my-image>is ok when
docker run -v /mnt/c/users/kenny/proj/sources <my-image>might have a much worthier performance
- Use WSL Remote extension for Visual Studio Code
Very useful. Save my days.