# 3. Deploying your first applicatio

This chapter covers

```
Running a local kubernetes cluster on your laptop
Setting up a cluster on Amazon Kubernetes Service
Setting up and using kubectl command line tool
Deploying an application in kubernetes cluster and making it available across the globe
Horizontally scaling the application                                                            
```

### Deploying a Kubernetes cluster

The Settings dialog box in Docker Desktop for Windows

<figure><img src="/files/9tAsCDxvxgrnNSJozMSn" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/6PYei10YORmbQ8nbSjMS" alt=""><figcaption></figcaption></figure>

To understand where the various components that make up the Kubernetes
\
cluster run in Docker Desktop, look at the following figure.

<figure><img src="/files/lAVm87iJ6QELN7M5q9ti" alt=""><figcaption></figcaption></figure>

**installing minikube**

visit --> (<http://github.com/kubernetes/minikube>) for installation guides

Tip
\
If you use Linux, you can reduce the resources required by Minikube by
\
creating the cluster without a VM. Use this command: `minikube start --`
\
`vm-driver none`

* To start a kubernetes cluster, using minikube run, `minikube start`
* &#x20;To check minikube status type `minikube status`&#x20;

<figure><img src="/files/FV43yiq1CZSApQnWvTDT" alt=""><figcaption></figcaption></figure>

Tip :&#x20;

* If you want to list containers using your local docker CLI instance, as in the
  \
  case of Docker Desktop, run the following command: `eval $(minikube`
  \
  `docker-env`&#x20;

<figure><img src="/files/pb0zQ5MsTx0z2i1XLo6X" alt=""><figcaption><p>Architecture of running a multi-node kubernetes cluster using Kind (kubernets in docker)</p></figcaption></figure>

* when you run Kubernetes using
  &#x20;kind, all Kubernetes components run in your host OS. The applications you
  &#x20;deploy to the Kubernetes cluster also run in your host OS.
  \
  This makes kind the perfect tool for development and testing, as everything
* To install a multi-node kubernetes cluster via kind, visit <https://kind.sigs.k8s.io/docs/user/quick-start/.> Please note that to spin up via kubernetes cluster, need to have docker installed
* `kind create cluster`--> To start kubernetes cluster
* kubernetes cluster architecture in gke is as follows :&#x20;

<figure><img src="/files/rmDBe22EvRgJDNud9tUX" alt=""><figcaption></figcaption></figure>

\--> Refer this  <https://cloud.google.com/container-engine/docs/before-you-begin.>

Creating a cluster using Amazon Elastic Kubernetes
\
Service

* To use Amazon's EKS cluster creation , first we must need to install eksctl commandline tool at t <https://docs.aws.amazon.com/eks/latest/userguide/gettingstarted-eksctl.html>
* Creating EKS kubernetes cluster using eksctl doesnot differ significantly from how you create a cluster in GKE. All u must do is run `eksctl create cluster --name kiada eu-central-1a --node`
* If you are interested in what's running on those nodes, you can use SSH to connect to them. The `--ssh-access` flag is used in the cluster that creates the cluster ensures that your SSH public key is imported to the node.

<figure><img src="/files/BsKowDpcCyrmhqEa0DWY" alt=""><figcaption><p>How we interact with the kubernetes cluster</p></figcaption></figure>

* On Windows, download kubectl.exe from
  \
  <https://storage.googleapis.com/kubernetesrelease/release/v1.18.2/bin/windows/amd64/kubectl.exe>. To download the
  \
  latest version, first go to <https://storage.googleapis.com/kubernetesrelease/release/stable.txt&#x20>;

Interacting with kubernetes cluster&#x20;


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