# Overview

![k3d](static/img/k3d_logo_black_blue.svg)

**This page is targeting k3d v4.0.0 and newer!**

k3d is a lightweight wrapper to run [k3s](https://github.com/rancher/k3s) (Rancher Lab's minimal Kubernetes distribution) in docker.

k3d makes it very easy to create single- and multi-node [k3s](https://github.com/rancher/k3s) clusters in docker, e.g. for local development on Kubernetes.

??? Tip "View a quick demo"
    <asciinema-player src="/static/asciicast/20200715_k3d.01.cast" cols=200 rows=32></asciinema-player>

## Learning

- [Rancher Meetup - May 2020 - Simplifying Your Cloud-Native Development Workflow With K3s, K3c and K3d (YouTube)](https://www.youtube.com/watch?v=hMr3prm9gDM)
  - k3d demo repository: [iwilltry42/k3d-demo](https://github.com/iwilltry42/k3d-demo)

## Requirements

- [docker](https://docs.docker.com/install/)

## Releases

| Platform | Stage | Version | Release Date |  |
|-----------------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------|---|
| [**GitHub Releases**](https://github.com/rancher/k3d/releases) | stable | [![GitHub release (latest by date)](https://img.shields.io/github/v/release/rancher/k3d?label=%20&style=for-the-badge&logo=github)](https://github.com/rancher/k3d/releases/latest) | [![GitHub Release Date](https://img.shields.io/github/release-date/rancher/k3d?label=%20&style=for-the-badge)](https://github.com/rancher/k3d/releases/latest) |  |
| [**GitHub Releases**](https://github.com/rancher/k3d/releases) | latest | [![GitHub release (latest by date including pre-releases)](https://img.shields.io/github/v/release/rancher/k3d?include_prereleases&label=%20&style=for-the-badge&logo=github)](https://github.com/rancher/k3d/releases) | [![GitHub (Pre-)Release Date](https://img.shields.io/github/release-date-pre/rancher/k3d?label=%20&style=for-the-badge)](https://github.com/rancher/k3d/releases) |  |
| [**Homebrew**](https://formulae.brew.sh/formula/k3d) | - | [![homebrew](https://img.shields.io/homebrew/v/k3d?label=%20&style=for-the-badge)](https://formulae.brew.sh/formula/k3d) | - |  |

## Installation

You have several options there:

- use the install script to grab the latest release:
  - wget: `#!bash wget -q -O - https://raw.githubusercontent.com/rancher/k3d/main/install.sh | bash`
  - curl: `#!bash curl -s https://raw.githubusercontent.com/rancher/k3d/main/install.sh | bash`
- use the install script to grab a specific release (via `TAG` environment variable):
  - wget: `#!bash wget -q -O - https://raw.githubusercontent.com/rancher/k3d/main/install.sh | TAG=v4.0.0 bash`
  - curl: `#!bash curl -s https://raw.githubusercontent.com/rancher/k3d/main/install.sh | TAG=v4.0.0 bash`

- use [Homebrew](https://brew.sh): `#!bash brew install k3d` (Homebrew is available for MacOS and Linux)
  - Formula can be found in [homebrew/homebrew-core](https://github.com/Homebrew/homebrew-core/blob/master/Formula/k3d.rb) and is mirrored to [homebrew/linuxbrew-core](https://github.com/Homebrew/linuxbrew-core/blob/master/Formula/k3d.rb)
- install via [AUR](https://aur.archlinux.org/) package [rancher-k3d-bin](https://aur.archlinux.org/packages/rancher-k3d-bin/): `yay -S rancher-k3d-bin`
- grab a release from the [release tab](https://github.com/rancher/k3d/releases) and install it yourself.
- install via go: `#!bash go install github.com/rancher/k3d` (**Note**: this will give you unreleased/bleeding-edge changes)
- use [arkade](https://github.com/alexellis/arkade): `arkade get k3d`
- use [asdf](https://asdf-vm.com): `asdf plugin-add k3d`, then `asdf install k3d <tag>` with `<tag> = latest` or `3.x.x` for a specific version (maintained by [spencergilbert/asdf-k3d](https://github.com/spencergilbert/asdf-k3d))

## Quick Start

Create a cluster named `mycluster` with just a single server node:

```bash
k3d cluster create mycluster
```

Get the new cluster's connection details merged into your default kubeconfig (usually specified using the `KUBECONFIG` environment variable or the default path `#!bash $HOME/.kube/config`) and directly switch to the new context:

```bash
k3d kubeconfig merge mycluster --kubeconfig-switch-context
```

Use the new cluster with [`kubectl`](https://kubernetes.io/docs/tasks/tools/install-kubectl/), e.g.:

```bash
kubectl get nodes
```

## Related Projects

- [k3x](https://github.com/inercia/k3x): a graphics interface (for Linux) to k3d.