WSL+Docker: Kubernetes on the Windows Desktop (2023)

Thursday, May 21, 2020

Authors: Nuno do Carmo Docker Captain and WSL Corsair; Ihor Dvoretskyi, Developer Advocate, Cloud Native Computing Foundation

New to Windows 10 and WSL2, or new to Docker and Kubernetes? Welcome to this blog post where we will install from scratch Kubernetes in Docker KinD and Minikube.

For the last few years, Kubernetes became a de-facto standard platform for running containerized services and applications in distributed environments. While a wide variety of distributions and installers exist to deploy Kubernetes in the cloud environments (public, private or hybrid), or within the bare metal environments, there is still a need to deploy and run Kubernetes locally, for example, on the developer's workstation.

Kubernetes has been originally designed to be deployed and used in the Linux environments. However, a good number of users (and not only application developers) use Windows OS as their daily driver. When Microsoft revealed WSL - the Windows Subsystem for Linux, the line between Windows and Linux environments became even less visible.

Also, WSL brought an ability to run Kubernetes on Windows almost seamlessly!

Below, we will cover in brief how to install and use various solutions to run Kubernetes locally.

Since we will explain how to install KinD, we won't go into too much detail around the installation of KinD's dependencies.

However, here is the list of the prerequisites needed and their version/lane:

OS: Windows 10 version 2004, Build 19041
WSL2 enabled
- In order to install the distros as WSL2 by default, once WSL2 installed, run the command wsl.exe --set-default-version 2 in Powershell
WSL2 distro installed from the Windows Store - the distro used is Ubuntu-18.04
Docker Desktop for Windows, stable channel - the version used is 2.2.0.4
[Optional] Microsoft Terminal installed from the Windows Store
- Open the Windows store and type "Terminal" in the search, it will be (normally) the first option

And that's actually it. For Docker Desktop for Windows, no need to configure anything yet as we will explain it in the next section.

Once everything is installed, we can launch the WSL2 terminal from the Start menu, and type "Ubuntu" for searching the applications and documents:

Once found, click on the name and it will launch the default Windows console with the Ubuntu bash shell running.

Like for any normal Linux distro, you need to create a user and set a password:

[Optional] Update the `sudoers`

As we are working, normally, on our local computer, it might be nice to update the sudoers and set the group %sudo to be password-less:

# Edit the sudoers with the visudo commandsudo visudo# Change the %sudo group to be password-less%sudo ALL=(ALL:ALL) NOPASSWD: ALL# Press CTRL+X to exit# Press Y to save# Press Enter to confirm

Update Ubuntu

Before we move to the Docker Desktop settings, let's update our system and ensure we start in the best conditions:

# Update the repositories and list of the packages availablesudo apt update# Update the system based on the packages installed > the "-y" will approve the change automaticallysudo apt upgrade -y

Before we move into the settings, let's do a small test, it will display really how cool the new integration with Docker Desktop is:

# Try to see if the docker cli and daemon are installeddocker version# Same for kubectlkubectl version

You got an error? Perfect! It's actually good news, so let's now move on to the settings.

Docker Desktop settings: enable WSL2 integration

First let's start Docker Desktop for Windows if it's not still the case. Open the Windows start menu and type "docker", click on the name to start the application:

You should now see the Docker icon with the other taskbar icons near the clock:

(Video) Kubernetes on Windows 10 with Docker Desktop

Now click on the Docker icon and choose settings. A new window will appear:

By default, the WSL2 integration is not active, so click the "Enable the experimental WSL 2 based engine" and click "Apply & Restart":

What this feature did behind the scenes was to create two new distros in WSL2, containing and running all the needed backend sockets, daemons and also the CLI tools (read: docker and kubectl command).

Still, this first setting is still not enough to run the commands inside our distro. If we try, we will have the same error as before.

In order to fix it, and finally be able to use the commands, we need to tell the Docker Desktop to "attach" itself to our distro also:

Let's now switch back to our WSL2 terminal and see if we can (finally) launch the commands:

# Try to see if the docker cli and daemon are installeddocker version# Same for kubectlkubectl version

Tip: if nothing happens, restart Docker Desktop and restart the WSL process in Powershell: Restart-Service LxssManager and launch a new Ubuntu session

And success! The basic settings are now done and we move to the installation of KinD.

Right now, we have Docker that is installed, configured and the last test worked fine.

However, if we look carefully at the kubectl command, it found the "Client Version" (1.15.5), but it didn't find any server.

This is normal as we didn't enable the Docker Kubernetes cluster. So let's install KinD and create our first cluster.

And as sources are always important to mention, we will follow (partially) the how-to on the official KinD website:

# Download the latest version of KinDcurl -Lo ./kind https://github.com/kubernetes-sigs/kind/releases/download/v0.7.0/kind-linux-amd64# Make the binary executablechmod +x ./kind# Move the binary to your executable pathsudo mv ./kind /usr/local/bin/

KinD: the first cluster

We are ready to create our first cluster:

# Check if the KUBECONFIG is not setecho $KUBECONFIG# Check if the .kube directory is created > if not, no need to create itls $HOME/.kube# Create the cluster and give it a name (optional)kind create cluster --name wslkind# Check if the .kube has been created and populated with filesls $HOME/.kube

Tip: as you can see, the Terminal was changed so the nice icons are all displayed

The cluster has been successfully created, and because we are using Docker Desktop, the network is all set for us to use "as is".

So we can open the Kubernetes master URL in our Windows browser:

And this is the real strength from Docker Desktop for Windows with the WSL2 backend. Docker really did an amazing integration.

KinD: counting 1 - 2 - 3

Our first cluster was created and it's the "normal" one node cluster:

(Video) Docker and Kubernetes on Windows 10

# Check how many nodes it createdkubectl get nodes# Check the services for the whole clusterkubectl get all --all-namespaces

While this will be enough for most people, let's leverage one of the coolest feature, multi-node clustering:

# Delete the existing clusterkind delete cluster --name wslkind# Create a config file for a 3 nodes clustercat << EOF > kind-3nodes.yamlkind: ClusterapiVersion: kind.x-k8s.io/v1alpha4nodes: - role: control-plane - role: worker - role: workerEOF# Create a new cluster with the config filekind create cluster --name wslkindmultinodes --config ./kind-3nodes.yaml# Check how many nodes it createdkubectl get nodes

Tip: depending on how fast we run the "get nodes" command, it can be that not all the nodes are ready, wait few seconds and run it again, everything should be ready

And that's it, we have created a three-node cluster, and if we look at the services one more time, we will see several that have now three replicas:

# Check the services for the whole clusterkubectl get all --all-namespaces

KinD: can I see a nice dashboard?

Working on the command line is always good and very insightful. However, when dealing with Kubernetes we might want, at some point, to have a visual overview.

For that, the Kubernetes Dashboard project has been created. The installation and first connection test is quite fast, so let's do it:

# Install the Dashboard application into our clusterkubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0-rc6/aio/deploy/recommended.yaml# Check the resources it created based on the new namespace createdkubectl get all -n kubernetes-dashboard

As it created a service with a ClusterIP (read: internal network address), we cannot reach it if we type the URL in our Windows browser:

That's because we need to create a temporary proxy:

# Start a kubectl proxykubectl proxy# Enter the URL on your browser: http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

Finally to login, we can either enter a Token, which we didn't create, or enter the kubeconfig file from our Cluster.

If we try to login with the kubeconfig, we will get the error "Internal error (500): Not enough data to create auth info structure". This is due to the lack of credentials in the kubeconfig file.

So to avoid you ending with the same error, let's follow the recommended RBAC approach.

Let's open a new WSL2 session:

# Create a new ServiceAccountkubectl apply -f - <<EOFapiVersion: v1kind: ServiceAccountmetadata: name: admin-user namespace: kubernetes-dashboardEOF# Create a ClusterRoleBinding for the ServiceAccountkubectl apply -f - <<EOFapiVersion: rbac.authorization.k8s.io/v1kind: ClusterRoleBindingmetadata: name: admin-userroleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-adminsubjects:- kind: ServiceAccount name: admin-user namespace: kubernetes-dashboardEOF

# Get the Token for the ServiceAccountkubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')# Copy the token and copy it into the Dashboard login and press "Sign in"

Success! And let's see our nodes listed also:

A nice and shiny three nodes appear.

(Video) Kubernetes on Windows with WSL 2 and Microk8s

Right now, we have Docker that is installed, configured and the last test worked fine.

However, if we look carefully at the kubectl command, it found the "Client Version" (1.15.5), but it didn't find any server.

This is normal as we didn't enable the Docker Kubernetes cluster. So let's install Minikube and create our first cluster.

And as sources are always important to mention, we will follow (partially) the how-to from the Kubernetes.io website:

# Download the latest version of Minikubecurl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64# Make the binary executablechmod +x ./minikube# Move the binary to your executable pathsudo mv ./minikube /usr/local/bin/

Minikube: updating the host

If we follow the how-to, it states that we should use the --driver=none flag in order to run Minikube directly on the host and Docker.

Unfortunately, we will get an error about "conntrack" being required to run Kubernetes v 1.18:

# Create a minikube one node clusterminikube start --driver=none

Tip: as you can see, the Terminal was changed so the nice icons are all displayed

So let's fix the issue by installing the missing package:

# Install the conntrack packagesudo apt install -y conntrack

Let's try to launch it again:

# Create a minikube one node clusterminikube start --driver=none# We got a permissions error > try again with sudosudo minikube start --driver=none

Ok, this error cloud be problematic ... in the past. Luckily for us, there's a solution

Minikube: enabling SystemD

In order to enable SystemD on WSL2, we will apply the scripts from Daniel Llewellyn.

I invite you to read the full blog post and how he came to the solution, and the various iterations he did to fix several issues.

So in a nutshell, here are the commands:

# Install the needed packagessudo apt install -yqq daemonize dbus-user-session fontconfig

# Create the start-systemd-namespace scriptsudo vi /usr/sbin/start-systemd-namespace#!/bin/bashSYSTEMD_PID=$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')if [ -z "$SYSTEMD_PID" ] || [ "$SYSTEMD_PID" != "1" ]; then export PRE_NAMESPACE_PATH="$PATH" (set -o posix; set) | \ grep -v "^BASH" | \ grep -v "^DIRSTACK=" | \ grep -v "^EUID=" | \ grep -v "^GROUPS=" | \ grep -v "^HOME=" | \ grep -v "^HOSTNAME=" | \ grep -v "^HOSTTYPE=" | \ grep -v "^IFS='.*"$'\n'"'" | \ grep -v "^LANG=" | \ grep -v "^LOGNAME=" | \ grep -v "^MACHTYPE=" | \ grep -v "^NAME=" | \ grep -v "^OPTERR=" | \ grep -v "^OPTIND=" | \ grep -v "^OSTYPE=" | \ grep -v "^PIPESTATUS=" | \ grep -v "^POSIXLY_CORRECT=" | \ grep -v "^PPID=" | \ grep -v "^PS1=" | \ grep -v "^PS4=" | \ grep -v "^SHELL=" | \ grep -v "^SHELLOPTS=" | \ grep -v "^SHLVL=" | \ grep -v "^SYSTEMD_PID=" | \ grep -v "^UID=" | \ grep -v "^USER=" | \ grep -v "^_=" | \ cat - > "$HOME/.systemd-env" echo "PATH='$PATH'" >> "$HOME/.systemd-env" exec sudo /usr/sbin/enter-systemd-namespace "$BASH_EXECUTION_STRING"fiif [ -n "$PRE_NAMESPACE_PATH" ]; then export PATH="$PRE_NAMESPACE_PATH"fi

# Create the enter-systemd-namespacesudo vi /usr/sbin/enter-systemd-namespace#!/bin/bashif [ "$UID" != 0 ]; then echo "You need to run $0 through sudo" exit 1fiSYSTEMD_PID="$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')"if [ -z "$SYSTEMD_PID" ]; then /usr/sbin/daemonize /usr/bin/unshare --fork --pid --mount-proc /lib/systemd/systemd --system-unit=basic.target while [ -z "$SYSTEMD_PID" ]; do SYSTEMD_PID="$(ps -ef | grep '/lib/systemd/systemd --system-unit=basic.target$' | grep -v unshare | awk '{print $2}')" donefiif [ -n "$SYSTEMD_PID" ] && [ "$SYSTEMD_PID" != "1" ]; then if [ -n "$1" ] && [ "$1" != "bash --login" ] && [ "$1" != "/bin/bash --login" ]; then exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \ /usr/bin/sudo -H -u "$SUDO_USER" \ /bin/bash -c 'set -a; source "$HOME/.systemd-env"; set +a; exec bash -c '"$(printf "%q" "$@")" else exec /usr/bin/nsenter -t "$SYSTEMD_PID" -a \ /bin/login -p -f "$SUDO_USER" \ $(/bin/cat "$HOME/.systemd-env" | grep -v "^PATH=") fi echo "Existential crisis"fi

# Edit the permissions of the enter-systemd-namespace scriptsudo chmod +x /usr/sbin/enter-systemd-namespace# Edit the bash.bashrc filesudo sed -i 2a"# Start or enter a PID namespace in WSL2\nsource /usr/sbin/start-systemd-namespace\n" /etc/bash.bashrc

Finally, exit and launch a new session. You do not need to stop WSL2, a new session is enough:

(Video) Kubernetes on Docker Desktop (Nginx Running on Pods)

Minikube: the first cluster

We are ready to create our first cluster:

# Check if the KUBECONFIG is not setecho $KUBECONFIG# Check if the .kube directory is created > if not, no need to create itls $HOME/.kube# Check if the .minikube directory is created > if yes, delete itls $HOME/.minikube# Create the cluster with sudosudo minikube start --driver=none

In order to be able to use kubectl with our user, and not sudo, Minikube recommends running the chown command:

# Change the owner of the .kube and .minikube directoriessudo chown -R $USER $HOME/.kube $HOME/.minikube# Check the access and if the cluster is runningkubectl cluster-info# Check the resources createdkubectl get all --all-namespaces

The cluster has been successfully created, and Minikube used the WSL2 IP, which is great for several reasons, and one of them is that we can open the Kubernetes master URL in our Windows browser:

And the real strength of WSL2 integration, the port 8443 once open on WSL2 distro, it actually forwards it to Windows, so instead of the need to remind the IP address, we can also reach the Kubernetes master URL via localhost:

Minikube: can I see a nice dashboard?

Working on the command line is always good and very insightful. However, when dealing with Kubernetes we might want, at some point, to have a visual overview.

For that, Minikube embeded the Kubernetes Dashboard. Thanks to it, running and accessing the Dashboard is very simple:

# Enable the Dashboard servicesudo minikube dashboard# Access the Dashboard from a browser on Windows side

The command creates also a proxy, which means that once we end the command, by pressing CTRL+C, the Dashboard will no more be accessible.

Still, if we look at the namespace kubernetes-dashboard, we will see that the service is still created:

# Get all the services from the dashboard namespacekubectl get all --namespace kubernetes-dashboard

Let's edit the service and change it's type to LoadBalancer:

# Edit the Dashoard servicekubectl edit service/kubernetes-dashboard --namespace kubernetes-dashboard# Go to the very end and remove the last 2 linesstatus: loadBalancer: {}# Change the type from ClusterIO to LoadBalancer type: LoadBalancer# Save the file

Check again the Dashboard service and let's access the Dashboard via the LoadBalancer:

# Get all the services from the dashboard namespacekubectl get all --namespace kubernetes-dashboard# Access the Dashboard from a browser on Windows side with the URL: localhost:<port exposed>

It's clear that we are far from done as we could have some LoadBalancing implemented and/or other services (storage, ingress, registry, etc...).

Concerning Minikube on WSL2, as it needed to enable SystemD, we can consider it as an intermediate level to be implemented.

So with two solutions, what could be the "best for you"? Both bring their own advantages and inconveniences, so here an overview from our point of view solely:

Criteria	KinD	Minikube
Installation on WSL2	Very Easy	Medium
Multi-node	Yes	No
Plugins	Manual install	Yes
Persistence	Yes, however not designed for	Yes
Alternatives	K3d	Microk8s

We hope you could have a real taste of the integration between the different components: WSL2 - Docker Desktop - KinD/Minikube. And that gave you some ideas or, even better, some answers to your Kubernetes workflows with KinD and/or Minikube on Windows and WSL2.

See you soon for other adventures in the Kubernetes ocean.

Nuno & Ihor

(Video) Detailed Windows Terminal, (WSL 2), Linux, Docker, and Kubernetes Install Guide on Windows 10.

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Can Kubernetes run on any OS? ›

Kubernetes is itself an application (or set of applications), and these applications have to run somewhere. Despite what you may have heard, Kubernetes is not an operating system, but still depends on Linux (or Windows) to be installed on the nodes.

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How do I run Kubernetes on Windows 11? ›

Installing Kubernetes on Windows

Step 1: Enable Hyper-V. Hyper-V is Microsoft's hardware virtualization product that allows the creation of virtual machines in their own isolated space. ...
Step 2: Install Docker for Windows. ...
Step 3: Install Kubernetes. ...
Step 4: Install Kubernetes Dashboard.

Jun 23, 2022

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Can WSL2 run Windows containers? ›

By enabling the WSL 2 based engine, you can run both Linux and Windows containers in Docker Desktop on the same machine.

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Can I run GUI in WSL2? ›

Windows Subsystem for Linux (WSL) now supports running Linux GUI applications (X11 and Wayland) on Windows in a fully integrated desktop experience. WSL 2 enables Linux GUI applications to feel native and natural to use on Windows.

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Does kubectl work on Windows? ›

To install kubectl on Windows you can use either Chocolatey package manager, Scoop command-line installer, or winget package manager.

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Is WSL a VM or container? ›

WSL 2 is running as a hyper-v virtual machine.

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How do I create a Kubernetes cluster in WSL? ›

Setup Local Kubernetes Cluster with Docker, WSL2 and KinD

KinD Pre-Requisites. Here is the list of the prerequisites needed and their version/lane: ...
Setup WSL2. ...
Install Linux Distro. ...
Setting up Docker Desktop in WSL2. ...
Setup KinD on Linux Distro. ...
Spin a KinD Kubernetes Cluster. ...
Running Multi-node cluster with KinD.

Mar 19, 2021

Keep Reading ›

Is Docker better on Windows or Linux? ›

Use Linux for Containers, it is always the best option. Windows 7 or Windows 10 Home doesn't support Docker, you need to use Docker Toolbox which is not great. There is no support for Windows containers in most cloud providers or Kubernetes.

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Should I use Kubernetes or Docker? ›

If you have few workloads running, don't mind managing your own infrastructure, or don't need a specific feature Kubernetes offers, then Docker Swarm may be a great choice. Kubernetes is more complex to set up in the beginning but offers greater flexibility and features.

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WSL+Docker: Kubernetes on the Windows Desktop (2023)

[Optional] Update the `sudoers`

Update Ubuntu

Docker Desktop settings: enable WSL2 integration

KinD: the first cluster

KinD: counting 1 - 2 - 3

KinD: can I see a nice dashboard?

Minikube: updating the host

Minikube: enabling SystemD

Minikube: the first cluster

Minikube: can I see a nice dashboard?

FAQs

Can I run Kubernetes on WSL? ›

Is Docker desktop no longer free? ›

Should I use WSL or Windows? ›

Is Docker still relevant 2022? ›

Is Kubernetes enough to get a job? ›

Can I run Kubernetes on Ubuntu? ›

Videos

WSL+Docker: Kubernetes on the Windows Desktop (2023)

[Optional] Update the sudoers

Update Ubuntu

Docker Desktop settings: enable WSL2 integration

KinD: the first cluster

KinD: counting 1 - 2 - 3

KinD: can I see a nice dashboard?

Minikube: updating the host

Minikube: enabling SystemD

Minikube: the first cluster

Minikube: can I see a nice dashboard?

FAQs

Can I run Kubernetes on WSL? ›

Is Docker desktop no longer free? ›

Should I use WSL or Windows? ›

Is Docker still relevant 2022? ›

Is Kubernetes enough to get a job? ›

Can I run Kubernetes on Ubuntu? ›

Videos

[Optional] Update the `sudoers`