What is Kubernetes
Kubernetes clusters host containerised applications
in a reliable and scalable way. Having DevOps in mind, Kubernetes makes
maintenance tasks such as upgrades dead simple.
What is MicroK8s
MicroK8s is a CNCF certified upstream Kubernetes deployment that runs entirely on your workstation or edge device.
Being a snap it runs all Kubernetes services natively (i.e. no virtual machines) while packing the entire set of libraries and binaries needed. Installation is limited by how fast you can download a couple
of hundred megabytes and the removal of MicroK8s leaves nothing behind.
In this tutorial you’ll learn how to…
- Install Homebrew on macOS
- Install Multipass and MicroK8s from Brew
- Run MicroK8s add-ons
You will only need …
- A machine with macOS with at least 8GB of RAM
Open a terminal and run the installer:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
This will download and execute the installer for Homebrew on your Mac.
With Homebrew installed, you can now use it to install the pre-packaged version
of MicroK8s. This is achieved in two stages.
First run the command:
brew install ubuntu/microk8s/microk8s
This will download and install a version of Multipass, a VM system for running
Ubuntu and other packages required by MicroK8s.
The second stage is to initialise the MicroK8s environment, This is done by
microk8s command which was added to your system in the
Wait for MicroK8s to start
MicroK8s will run all the components necessary to set up and run a full
Kubernetes environment. On some systems, this can take a minute or two. We
can check when the system is ready by running:
microk8s status --wait-ready
MicroK8s bundles its own version of
kubectl for accessing Kubernetes. Use it
to run commands to monitor and control your Kubernetes. For example, to view your node:
microk8s kubectl get nodes
…or to see the running services:
microk8s kubectl get services
Deploy an app
Of course, Kubernetes is meant for deploying apps and services. You can use
the kubectl command to do that as with any Kuberenetes. Try
installing a demo app:
microk8s kubectl create deployment kubernetes-bootcamp --image=gcr.io/google-samples/kubernetes-bootcamp:v1
It may take a minute or two to install, but you can check the status:
microk8s kubectl get pods
MicroK8s uses the minimum of components for a pure, lightweight Kubernetes.
However, plenty of extra features are available with a few keystrokes using
“add-ons” – pre-packaged components that will provide extra capabilities
for your Kubernetes, from simple DNS management to machine learning with
To start it is recommended to add DNS management to facilitate communication
between services. For applications which need storage, the ‘storage’ add-on
provides directory space on the host. These are easy to set up:
microk8s enable dns storage
Starting and Stopping MicroK8s
MicroK8s will continue running until you decide to stop it. You can stop and
start MicroK8s with these simple commands:
… will stop MicroK8s and its services. You can start again any time by running:
You now have your own Kubernetes, ready to deploy apps or experiment with.
- One node not enough? Try setting up a MicroK8s cluster.
- Want to experiment with alpha releases of Kubernetes? See the documentation on setting channels.
- Need to fiddle with the Kubernetes configuration? Find out how to configure the Kubernetes services.
- Find out how to run MicroK8s on Windows, Multipass or a Raspberry Pi.
- Having problems? Check out our troubleshooting section.
- Love MicroK8s? Want to contribute or suggest a feature? Give us your feedback.