# Kubernetes in a Month

## Syllabus

## objective : Launch Rancher locally via Docker, access it's UI  and setup the admin user to begin cluster management

## Day 1 - Prerequisites and initial setup

Daily tasks :tada: : 

* Installed Docker
* Install Minikube
* Install Kubectl 
* Install Helm

```
# Docker installation
sudo apt update && sudo apt install -y docker.io
# check docker version
docker version
# Add user to the group
sudo usermod -aG docker $USER && newgrp docker

# kubectl installation 
curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && sudo install kubectl /usr/local/bin/
# version check
kubectl version --client

```

To run rancher container

`docker run -d --restart=unless-stopped -p 80:80 -p 443:443 --name rancher rancher/rancher:latest`

```
-d: Runs in detached mode (background).
--restart=unless-stopped: Restarts unless manually stopped, mimicking prod resilience.
-p 80:80 -p 443:443: Maps HTTP and HTTPS ports to your host.
--name rancher: Names the container for easy reference.
rancher/rancher:latest: Pulls the latest stable Rancher image.                             
```

<figure><img src="/files/My5tkbUKN8RjYQhmLWFh" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/WucD29Eyz3TRNmQ9Ej2Y" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/9YVFfYSpoce0dxMh4xqT" alt=""><figcaption></figcaption></figure>

### Day-2 Deploy RKE Cluster

Objective : Use Rancher UI to create a single-node RKE cluster on your local Minikube environment, verify its status, and prepare it for ShopSphere deployments

1. Start minikube(Base for RKE) `minikube start --driver=docker --nodes 1 --memory 4096 --cpus 4`&#x20;
2. check status `minikube status`

<figure><img src="/files/658sIgNBQCPlMEFbywTX" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/C5GvwJP1P4gF99s6dPlq" alt=""><figcaption></figcaption></figure>

3. Access Rancher Ui and Create RKE Cluster

cluster management -->  create --> custom and Give name to the cluster of your choice `shopshere-cluster`  let's leave other settings default and then do the node configuration as like below👇

<figure><img src="/files/QJ81DGHwKSojefDamw1Q" alt=""><figcaption></figcaption></figure>

4. Run Rancher agent on minikube host. In your terminal copy paste the command that you copied on rancher UI.&#x20;

<figure><img src="/files/iiuhR3weoa2flko0BWIK" alt=""><figcaption></figcaption></figure>

```
--privileged: Grants necessary permissions for Kubernetes components.
-v /var/run/docker.sock: Allows the agent to manage Docker on your host.
--etcd --controlplane --worker: Configures all roles on this node
```

Verify Agent is running

<figure><img src="/files/Y3iPTp9ympUquluBVIVu" alt=""><figcaption></figcaption></figure>

5. Monitor cluster creation in Rancher UI

6. Download kubeconfig and test cluster&#x20;

<figure><img src="/files/j4WrfQc4G6EErNzsuEn3" alt=""><figcaption></figcaption></figure>

* Get kubeconfig file of the cluster by clicking on : at the end of the cluster and copy it in your terminal. update minikube and check the cluster status by running `kubectl cluster-info` &#x20;

### Day 3  Deploy Product Service with Helm

Objective : Containerize the product service, create a helm chart, and deploy it to your shopshere-cluster via Rancher, ensuring it is running and accessible locally

**Pre-requisites :**&#x20;

* Rancher is running `docker ps | grep rancher`&#x20;
* RKE cluster (shopshere-cluster) is active in rancher dashboard : Check rancher ui or kubectl get nodes
* Docker hub account is setup for pushing images
* Helm is installed
* Updated jira dashboard

<figure><img src="/files/xocXoZqdaNFfm9JE1dxP" alt=""><figcaption></figcaption></figure>


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