k3d

k3s in docker

k3s is the lightweight Kubernetes distribution by Rancher: rancher/k3s

This repository is based on @zeerorg's zeerorg/k3s-in-docker, reimplemented in Go by @iwilltry42 in iwilltry42/k3d, which is now rancher/k3d.

Requirements

• docker

Get

You have several options there:

• use the install script to grab the latest release:

  • wget: wget -q -O - https://raw.githubusercontent.com/rancher/k3d/master/install.sh | bash
  • curl: curl -s https://raw.githubusercontent.com/rancher/k3d/master/install.sh | bash

• use the install script to grab a specific release (via TAG environment variable):

  • wget: wget -q -O - https://raw.githubusercontent.com/rancher/k3d/master/install.sh | TAG=v1.3.4 bash
  • curl: curl -s https://raw.githubusercontent.com/rancher/k3d/master/install.sh | TAG=v1.3.4 bash

• Use Homebrew: brew install k3d (Homebrew is avaiable for MacOS and Linux)

  • Formula can be found in homebrew/homebrew-core and is mirrored to homebrew/linuxbrew-core

• Grab a release from the release tab and install it yourself.

• Via go: go install github.com/rancher/k3d (Note: this will give you unreleased/bleeding-edge changes)

or...

Build

1. Clone this repo, e.g. via go get -u github.com/rancher/k3d
2. Inside the repo run
   • 'make install-tools' to make sure required go packages are installed
3. Inside the repo run one of the following commands
   • make build to build for your current system
   • go install to install it to your GOPATH (Note: this will give you unreleased/bleeding-edge changes)
   • make build-cross to build for all systems

Usage

Check out what you can do via k3d help

Example Workflow: Create a new cluster and use it with kubectl (Note: kubectl is not part of k3d, so you have to install it first if needed)

1. k3d create to create a new single-node cluster (docker container)
2. export KUBECONFIG=$(k3d get-kubeconfig) to make kubectl to use the kubeconfig for that cluster
3. execute some commands like kubectl get pods --all-namespaces
4. k3d delete to delete the default cluster

Exposing Services

If you want to access your services from the outside (e.g. via Ingress), you need to map the ports (e.g. port 80 for Ingress) using the --publish flag (or aliases). Check out the examples here.

What now?

Find more details under the following Links:

• Further documentation
• Using registries
• Usage examples
• Frequently asked questions and nice-to-know facts

Connect

1. Join the Rancher community on slack via slack.rancher.io
2. Go to rancher-users.slack.com and join our channel #k3d
3. Start chatting