Downloading and installing Docker for Mac. For now, Kubernetes is only available on Docker for Mac 17.12 CE Edge (special Docker version for new and experimental features), so make sure you install the Edge version. On your Mac, double-click the Docker.dmg file and begin the installation process as instructed. Configure Docker. In order for Minikube to find any custom built docker images we need to store those within Minikube’s virtual environment. To configure your current shell to use Minikube’s docker daemon (see documentation): $ eval $(minikube docker-env) Thereafter, every docker image you build in this shell will be available inside Minikube.

This page shows you how to install Minikube, a tool that runs a single-node Kubernetes cluster in a virtual machine on your personal computer.

Before you begin

To check if virtualization is supported on Linux, run the following command and verify that the output is non-empty:

To check if virtualization is supported on macOS, run the following command on your terminal.

If you see VMX in the output (should be colored), the VT-x feature is enabled in your machine.

To check if virtualization is supported on Windows 8 and above, run the following command on your Windows terminal or command prompt.

If you see the following output, virtualization is supported on Windows.

If you see the following output, your system already has a Hypervisor installed and you can skip the next step.

Install kubectl

Make sure you have kubectl installed. You can install kubectl according to the instructions in Install and Set Up kubectl.

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Install a Hypervisor

If you do not already have a hypervisor installed, install one of these now:

• KVM, which also uses QEMU

• VirtualBox

Minikube also supports a --driver=none option that runs the Kubernetes components on the host and not in a VM.Using this driver requires Docker and a Linux environment but not a hypervisor.

If you’re using the none driver in Debian or a derivative, use the .deb packages forDocker rather than the snap package, which does not work with Minikube.You can download .deb packages from Docker.

Minikube also supports a vm-driver=podman similar to the Docker driver. Podman run as superuser privilege (root user) is the best way to ensure that your containers have full access to any feature available on your system.

Install Minikube using a package

There are experimental packages for Minikube available; you can find Linux (AMD64) packagesfrom Minikube’s releases page on GitHub.

Use your Linux’s distribution’s package tool to install a suitable package.

Install Minikube via direct download

If you’re not installing via a package, you can download a stand-alonebinary and use that.

Here’s an easy way to add the Minikube executable to your path:

Install Minikube using Homebrew

As yet another alternative, you can install Minikube using Linux Homebrew:

Install kubectl

Make sure you have kubectl installed. You can install kubectl according to the instructions in Install and Set Up kubectl.

Install a Hypervisor

If you do not already have a hypervisor installed, install one of these now:

• HyperKit

• VirtualBox

• VMware Fusion

Install Minikube

The easiest way to install Minikube on macOS is using Homebrew:

You can also install it on macOS by downloading a stand-alone binary:

Here’s an easy way to add the Minikube executable to your path:

Install kubectl

Make sure you have kubectl installed. You can install kubectl according to the instructions in Install and Set Up kubectl.

Install a Hypervisor

If you do not already have a hypervisor installed, install one of these now:

• Hyper-V

• VirtualBox

Install Minikube using Chocolatey

The easiest way to install Minikube on Windows is using Chocolatey (run as an administrator):

After Minikube has finished installing, close the current CLI session and restart. Minikube should have been added to your path automatically.

Install Minikube using an installer executable

To install Minikube manually on Windows using Windows Installer, download minikube-installer.exe and execute the installer.

Install Minikube via direct download

To install Minikube manually on Windows, download minikube-windows-amd64, rename it to minikube.exe, and add it to your path.

Confirm Installation

To confirm successful installation of both a hypervisor and Minikube, you can run the following command to start up a local Kubernetes cluster:

Once minikube start finishes, run the command below to check the status of the cluster:

If your cluster is running, the output from minikube status should be similar to:

After you have confirmed whether Minikube is working with your chosen hypervisor, you can continue to use Minikube or you can stop your cluster. To stop your cluster, run:

Clean up local state

If you have previously installed Minikube, and run:

and minikube start returned an error:

then you need to clear minikube’s local state:

What's next

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Docker For Mac 17.12 GA Release is now available for the general public. Experimental Kubernetes Support is available only on Edge Release. You can now run a single-node Kubernetes cluster from the “Kubernetes” Pane in Docker For Mac Preferences and use kubectl commands as well as docker commands. This means that there is no need of installing Kubectl or related Kubernetes CLI commands. It is ready-to-use platform which gives developers a simple and fast way to build and test Kubernetes apps locally with the latest and greatest Docker.

Say Bye to Minikube

Before Docker for Mac 17.12 release, for anyone who wants to get started with single node Kubernetes cluster, Minikube was an ideal tool. Minikube is a great local development environment and a way to learn the most common commands that help you to bring up a single node K8s cluster. To use Minikube, one needed a hypervisor and a container solution as well as the Kubernetes command-line tool called kubectl. Now these tools has to be manually installed on your Linux/MacOS.

But with the arrival of Kubernetes powered Docker for Mac 17.12, you no longer need these 3rd party tools & hypervisor to be installed or configured. Just update your Docker for Mac to 17.12 release and there you have ready-to-use single node Kubernetes cluster already up and running.

The Kubernetes server runs within a Docker container on your Mac, and is only for local testing. When Kubernetes support is enabled, you can deploy your workloads, in parallel, on Kubernetes, Swarm, and as standalone containers. Enabling or disabling the Kubernetes server does not affect your other workloads.

A Little about Kubernetes in 2018.

Kubernetes is not a mere orchestration system, in fact, it eliminates the need for orchestration. If you look at the technical definition of orchestration in wikipedia, it is all about the execution of a defined workflow: first do X, then Y, then Z. But in contrast, Kubernetes is comprised of a set of independent, composable control processes that continuously drive the current state towards the provided desired state. It shouldn’t matter how you get from X to Z. No need of any centralised control. This results in a system that is easier to use and more powerful, robust, resilient, and extensible.

Kubernetes provides a rich set of features for container grouping, container orchestration, health checking, service discovery, load balancing, horizontal autoscaling, secrets & configuration management, storage orchestration, resource usage monitoring, CLI, dashboard and much more. Few of the important points one should know about K8s are –

• Kubernetes operates at the application level rather than at the hardware level
• Kubernetes is not monolithic, and these default solutions are optional and pluggable.
• Kubernetes is not a traditional, all-inclusive PaaS (Platform as a Service) system
• Kubernetes operates on a declarative model, object specifications provided in so called manifest files declare how you want the cluster to look.
• Kubernetes aims to support an extremely diverse variety of workloads, including stateless, stateful, and>

  Setting up Web Application Cluster on K8s in 3 minutes

  This section assumes that you are well versed with Kubernetes architectureand concepts. We will start with a clean MacOS system, hence there is no POD, no deployment and just default Kubernetes service running on your machine.

  Steps:

  • Creating Pod using Pod Definition
  • Exposing Pod to external world
  • Cleaning up

  Creating Pod using Pod Definition

  The simplest pod definition describes the deployment of a single container. A pod definition is a declaration of a desired state. For example, a simple web server pod might be defined as such:

  It’s time to create our first Pod.

  To create a pod containing a web server, run the below command:

  Once the pod is created, you can list it using the below command:

  Showcasing details of a specific Pod can be achieved with the following command:

  Listing the Deployment:

  Creating a Deployment

  Verifying the Deployment

  Exposing the pods

  Exposing your pods so that it can access on the browser:

  Once the above command runs successfully, you should be able to list out the services –

  Now we should be able to access the Webdemo Test Page using the below command:

  Done. You have created your first Single Node web application cluster running on Kubernetes powered Docker for Mac Platform.

  Interestingly, one can run Docker specific commands too to list out the running containers:

  Cleaning Up

  To delete the webdemo containers, delete the deployment:

  Did you find 3-minutes still time-consuming? Do visit the below post to see how docker stack deploy can save your time.

  Did you find this blog helpful? Feel free to share your experience. Get in touch @ajeetsraina.

  If you are looking out for contribution/discussion, join me at Docker Community Slack Channel.

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