Install Kubernetes In Docker

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Aug 08, 2019 Step 1: Install Docker. Start by installing Docker runtime engine, this will be used to run all Kubernetes services. Our guides below should be of great help. Install Docker and Docker Compose on Linux; How to install Docker CE on Ubuntu / Debian / CentOS How to install Docker on Fedora; For quick install you can use below commands to install. Follow the below steps to install Helm and Kubernetes in Docker: Step 1: Installing Docker. First, download the Docker.exe from the official site ( Click this link to directly download docker for the win64 version ) Install the docker.exe file on your desktop. Installing Docker Desktop. After installation is complete, restart your desktop. See full list on docs.docker.com. Sep 29, 2021 The Docker Desktop installation includes Docker Engine,Docker CLI client, Docker Compose,Notary,Kubernetes,and Credential Helper. Containers and images created with Docker Desktop are shared between alluser accounts on machines where it is installed.

Install Kubernetes In Docker Download

Estimated reading time: 2 minutes

Docker Desktop includes a standalone Kubernetes server and client,as well as Docker CLI integration that runs on your machine. The Kubernetes server runs locally within your Docker instance, is not configurable, and is a single-node cluster.

The Kubernetes server runs within a Docker container on your local system, andis only for local testing. Enabling Kubernetes allows you to deployyour workloads in parallel, on Kubernetes, Swarm, and as standalone containers. Enabling or disabling the Kubernetes server does not affect your otherworkloads.

Prerequisites

The Kubernetes client command kubectl is included and configured to connectto the local Kubernetes server. If you have already installed kubectl andpointing to some other environment, such as minikube or a GKE cluster, ensure you change the context so that kubectl is pointing to docker-desktop:

If you installed kubectl using Homebrew, or by some other method, andexperience conflicts, remove /usr/local/bin/kubectl.

Enable Kubernetes

To enable Kubernetes support and install a standalone instance of Kubernetesrunning as a Docker container, go to Preferences > Kubernetes and then click Enable Kubernetes.

By default, Kubernetes containers are hidden from commands like dockerservice ls, because managing them manually is not supported. To see these internal containers, select Show system containers (advanced). Most users do not need this option.

Click Apply & Restart to save the settings and then click Install to confirm. This instantiates images required to run the Kubernetes server as containers, and installs the /usr/local/bin/kubectl command on your machine.

Install Kubernetes In DockerSetup

When Kubernetes is enabled and running, an additional status bar item displays at the bottom right of the Docker Desktop Settings dialog.

The status of Kubernetes shows in the Docker menu and the context points to docker-desktop.

Upgrade Kubernetes

Docker Desktop does not upgrade your Kubernetes cluster automatically after a new update. To upgrade your Kubernetes cluster to the latest version, select Reset Kubernetes Cluster.

Use the kubectl command

Kubernetes integration provides the Kubernetes CLI commandat /usr/local/bin/kubectl on Mac and at C:>Program FilesDockerDockerResourcesbinkubectl.exe on Windows. This location may not be in your shell’s PATHvariable, so you may need to type the full path of the command or add it tothe PATH.

You can test the command by listing the available nodes:

For more information about kubectl, see thekubectl documentation.

Disable Kubernetes

To disable Kubernetes support at any time, clear the Enable Kubernetes check box. This stops and removes Kubernetes containers, and also removes the /usr/local/bin/kubectl command.

deploy, kubernetes, kubectl, orchestration

Estimated reading time: 6 minutes

Prerequisites

  • Download and install Docker Desktop as described in Orientation and setup.
  • Work through containerizing an application in Part 2.
  • Make sure that Kubernetes is enabled on your Docker Desktop:
    • Mac: Click the Docker icon in your menu bar, navigate to Preferences and make sure there’s a green light beside ‘Kubernetes’.
    • Windows: Click the Docker icon in the system tray and navigate to Settings and make sure there’s a green light beside ‘Kubernetes’.

    If Kubernetes isn’t running, follow the instructions in Orchestration of this tutorial to finish setting it up.

Introduction

Now that we’ve demonstrated that the individual components of our application run as stand-alone containers, it’s time to arrange for them to be managed by an orchestrator like Kubernetes. Kubernetes provides many tools for scaling, networking, securing and maintaining your containerized applications, above and beyond the abilities of containers themselves.

Install Kubernetes In Docker Desktop

In order to validate that our containerized application works well on Kubernetes, we’ll use Docker Desktop’s built in Kubernetes environment right on our development machine to deploy our application, before handing it off to run on a full Kubernetes cluster in production. The Kubernetes environment created by Docker Desktop is fully featured, meaning it has all the Kubernetes features your app will enjoy on a real cluster, accessible from the convenience of your development machine.

What Is Kubernetes?

Describing apps using Kubernetes YAML

All containers in Kubernetes are scheduled as pods, which are groups of co-located containers that share some resources. Furthermore, in a realistic application we almost never create individual pods; instead, most of our workloads are scheduled as deployments, which are scalable groups of pods maintained automatically by Kubernetes. Lastly, all Kubernetes objects can and should be described in manifests called Kubernetes YAML files. These YAML files describe all the components and configurations of your Kubernetes app, and can be used to easily create and destroy your app in any Kubernetes environment.

  1. You already wrote a very basic Kubernetes YAML file in the Orchestration overview part of this tutorial. Now, let’s write a slightly more sophisticated YAML file to run and manage our bulletin board. Place the following in a file called bb.yaml:

    In this Kubernetes YAML file, we have two objects, separated by the ---:

    • A Deployment, describing a scalable group of identical pods. In this case, you’ll get just one replica, or copy of your pod, and that pod (which is described under the template: key) has just one container in it, based off of your bulletinboard:1.0 image from the previous step in this tutorial.
    • A NodePort service, which will route traffic from port 30001 on your host to port 8080 inside the pods it routes to, allowing you to reach your bulletin board from the network.

    Also, notice that while Kubernetes YAML can appear long and complicated at first, it almost always follows the same pattern:

    • The apiVersion, which indicates the Kubernetes API that parses this object
    • The kind indicating what sort of object this is
    • Some metadata applying things like names to your objects
    • The spec specifying all the parameters and configurations of your object.

Deploy and check your application

Install Kubernetes In Docker Software

  1. In a terminal, navigate to where you created bb.yaml and deploy your application to Kubernetes:

    you should see output that looks like the following, indicating your Kubernetes objects were created successfully:

  2. Make sure everything worked by listing your deployments:

    if all is well, your deployment should be listed as follows:

    This indicates all one of the pods you asked for in your YAML are up and running. Do the same check for your services:

    In addition to the default kubernetes service, we see our bb-entrypoint service, accepting traffic on port 30001/TCP.

  3. Open a browser and visit your bulletin board at localhost:30001; you should see your bulletin board, the same as when we ran it as a stand-alone container in Part 2 of the Quickstart tutorial.

  4. Once satisfied, tear down your application:

Conclusion

At this point, we have successfully used Docker Desktop to deploy our application to a fully-featured Kubernetes environment on our development machine. We haven’t done much with Kubernetes yet, but the door is now open; you can begin adding other components to your app and taking advantage of all the features and power of Kubernetes, right on your own machine.

In addition to deploying to Kubernetes, we have also described our application as a Kubernetes YAML file. This simple text file contains everything we need to create our application in a running state. We can check it into version control and share it with our colleagues, allowing us to distribute our applications to other clusters (like the testing and production clusters that probably come after our development environments) easily.

Kubernetes references

Further documentation for all new Kubernetes objects used in this article are available here:

Install Kubernetes Docker Windows

kubernetes, pods, deployments, kubernetes services