8 Steps To K8S Cluster

Author: Sam Griffith

Are you looking to set up your own learning environment for Kubernetes and you’re not sure where to begin?

That’s not too surprising given the fact that there are over 90 different Certified Kubernetes offerings!

That makes it incredibly difficult to know where to start.

One of the new Kubernetes installation options to watch out for is called kind (Kubernetes IN Docker). You can deploy it on Mac, Windows, or Linux, and even set up multi-node and HA clusters with it…

And the best part is that you can go from start-to-cluster in just 8 steps!

“kind is a tool for running local Kubernetes clusters using Docker container β€œnodes”. kind was primarily designed for testing Kubernetes itself, but may be used for local development or CI.”" https://kind.sigs.k8s.io/

The Setup

To follow this guide exactly, you must have the following already set up:

  1. You are using an Ubuntu machine (18.04 or 20.04, virtual machine preferred)
  2. You have root privileges on aforementioned machine

Step 1

The first thing we need to do is install docker.

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - && sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && sudo apt-get install docker-ce -y

Step 2

Next we will need to download and install kubectl.

$ curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && sudo install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

Step 3

Next, we need to download and set up Golang.

$ wget https://golang.org/dl/go1.15.8.linux-amd64.tar.gz && sudo tar -C /usr/local -xzf go1.15.8.linux-amd64.tar.gz && export PATH=$PATH:/usr/local/go/bin

Step 4

Now that we have our system ready to go (do you get it?) it is time for us to start installing kind. Run the following go command to download and install kind.

$ GO111MODULE="on" go get sigs.k8s.io/kind@v0.10.0 && sudo su

Step 5

Next we need to make sure that we have our path set up correctly to use kind. **NOTE: This assumes that you have established the go/bin directory under the user named ubuntu. If you were using a different user, please use that username instead.

# export PATH=$PATH:/home/ubuntu/go/bin

Note that this path will not stick around persistently. In order to properly edit this path, you would want to sudo visudo and append :/home/ubuntu/go/bin to the end of the line that says secure_path.

Step 6

Now we are able to create our first kind cluster. The first time through, this normally takes 2 to 3 minutes as kind has to download the kindest/node docker image first.

# kind create cluster

Creating cluster "kind" ...
βœ“ Ensuring node image (kindest/node:v1.20.2) οΏ½
βœ“ Preparing nodes πŸ“¦
βœ“ Writing configuration οΏ½
βœ“ Starting control-plane οΏ½
βœ“ Installing CNI οΏ½
βœ“ Installing StorageClass οΏ½
Set kubectl context to "kind-kind"
You can now use your cluster with:

kubectl cluster-info --context kind-kind

Have a nice day!

Step 7

Trust, but verify. Make sure that your cluster was actually set up.

# kind get clusters && kubectl cluster-info --context kind-kind

Kubernetes control plane is running at
KubeDNS is running at

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.

Step 8

Now it is time to take your cluster for a test-drive. Launch a basic nginx Pod named mypod in your newly created kind cluster and make sure that it launches and gets to a “Running” status.

# kubectl run mypod --image=nginx && kubectl get pods -w

pod/mypod created
mypod   0/1     Pending             0          1s
mypod   0/1     ContainerCreating   0          1s
mypod   1/1     Running             0          11s

Once you see your Pod with the STATUS of “Running,” exit out of the get pods -w command by pressing Ctrl c.

Your brand new Kubernetes Cluster is all set up! You are now free to start learning, testing, or dev-ing on your very own cluster!

Additional Resources

If you or your team are looking to learn more about Kubernetes, check out one of our Kubernetes courses and our Kubernetes Cheat Sheet.

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