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Little helper to run CNCF's k3s in Docker
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k3d

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k3s in docker

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

k3d creates containerized k3s clusters. This means, that you can spin up a multi-node k3s cluster on a single machine using docker.

Requirements

Get

You have several options there:

  • via brew (homebrew/linuxbrew): brew install k3d
  • 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
  • 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 or check the docs @ k3d.io

Example Workflow: Create a new cluster and use it with kubectl

  1. k3d create cluster CLUSTER_NAME to create a new single-node cluster (= 1 container running k3s)
  2. k3d get kubeconfig CLUSTER_NAME --switch to update your default kubeconfig and switch the current-context to the new one
  3. execute some commands like kubectl get pods --all-namespaces
  4. k3d delete cluster CLUSTER_NAME to delete the default cluster

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

History

This repository is based on @zeerorg's zeerorg/k3s-in-docker, reimplemented in Go by @iwilltry42 in iwilltry42/k3d, which got adopted by Rancher inrancher/k3d.