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Developing Kubernetes on Mac OS X

Kubernetes comes with a great script that lets you run an entire cluster locally using your current source code tree named hack/local-up-cluster.sh. However, it only runs on Linux, which means that if you're developing on your Mac you have to copy your source tree to a Linux machine to use the script (or switch to a Linux machine for development). Go in general, however, runs fine on Mac, so here is the flow that this Vagrant configuration aims to enable:

  • Edit source files on your Mac's checkout of Kubernetes and use go build (for syntax checking) and go test (for unit tests) directly on your Mac.
  • Run vagrant up (in this directory) to automatically:
  • Launch a Centos 7 VM on your Mac that has Go and Docker installed on the IP 10.1.2.3.
  • Enable the ability to run a Kubernetes cluster using hack/local-up-cluster.sh.

Getting started

You must have the following installed:

  • Virtualbox >= 5.1.22
  • Vagrant >= 1.9.5
  • vagrant-vbguest Vagrant plugin.
    • Install by running: vagrant plugin install vagrant-vbguest. We use the official CentOS 7 Vagrant box, which does not come with Virtualbox Guest Additions - installing this plugin ensures that the additions are installed on first vagrant up.
  • Go >= 1.8.3

Next, install Kubernetes to your GOPATH by running go get k8s.io/kubernetes/.... If you want to write and contribute code, fork Kubernetes with your user on GitHub, and add your repo as a remote to your local checkout by running:

Once you have a Kubernetes checkout in your GOPATH:

  1. git clone this repo (it does not need to be in your GOPATH) and cd into it.
  2. Run vagrant up. That will start up the VM and bootstrap it with docker, go, and your $GOPATH to /go (amongst other things; see setup.sh for the complete bootstrapping process).
  3. Use vagrant ssh to SSH into the VM.
  4. Enter sudo -i /go/src/k8s.io/kubernetes/hack/local-up-cluster.sh to start up a cluster using the code in your checkout.

The kubernetes apiserver is run on 10.1.2.3, not on 127.0.0.1, in order to enable access from your OS X host machine. If you want to use kubectl from your Mac, run export KUBERNETES_MASTER=10.1.2.3:8080 (the VM's environment is already preconfigured as such).