Chat App Deploy on Kubernetes Using Kind, Metallb and Ingress

This guide provides step-by-step instructions for deploying a full-stack chat application on Kubernetes using Kind, Metallb, and Ingress. It is designed to help developers set up a robust Kubernetes cluster for hosting containerized applications on a virtual private server (VPS).

The deployment includes setting up essential Kubernetes tools, configuring a load balancer, integrating SSL for secure communication, and deploying both the frontend and backend services. Additionally, optional sections cover monitoring the application with Prometheus and Grafana for enhanced observability and performance tracking.

Whether you are deploying a chat application for production or exploring Kubernetes capabilities, this guide will serve as a comprehensive roadmap to get your application up and running efficiently.

? Getting Started For k8s

Below table helps you to navigate to the particular tool installation section fast.

Tech stack	Installation
Docker	Install and configure Docker
Kind & Kubectl	Install and configure Kind & Kubectl
Metallb	Install Metallb
Ingress	Install and configure Ingress
Helm	Helm Install and configure
SSL Certificate	Install and configure Cert Manager
Project Deploy	Project Deploy and Others
Monitoring	Namespace Create for Groping Prometheus and grafana and Other
Prometheus	Install and configure Prometheus
Grafana	Install and configure Grafana

? Pre-requisites to implement this project:

[!Note]
vps minimum need

• RAM - 4GB
• CPU - 2 Core(s)
• Storage - 20 GB
• One Domain

? Docker Install and configure

sudo apt-get update

sudo apt-get install docker.io -y
sudo usermod -aG docker $USER && newgrp docker

? Kind & Kubectl Install and configure

Install KIND and kubectl using the provided script. Create kind_kubectl_config.yaml file:

#!/bin/bash

# For AMD64 / x86_64
[ $(uname -m) = x86_64 ] && curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.26.0/kind-linux-amd64
chmod +x ./kind
sudo cp ./kind /usr/local/bin/kind

VERSION="v1.31.0"
URL="https://dl.k8s.io/release/${VERSION}/bin/linux/amd64/kubectl"
INSTALL_DIR="/usr/local/bin"

curl -LO "$URL"
chmod +x kubectl
sudo mv kubectl $INSTALL_DIR/
kubectl version --client

rm -f kubectl
rm -rf kind

echo "kind & kubectl installation complete."

./kind_kubectl_config.yaml

[!Note]
If your Vps ARM64 then use this [ $(uname -m) = x86_64 ] && curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.26.0/kind-linux-amd64
Run this script and it cerate kubectl and kind environment.
Kind Install More Information

?️ Setting Up the KIND Cluster

Create a kind-cluster-config.yaml file:

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4

nodes:
- role: control-plane
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP

Create the cluster using the configuration file:

kind create cluster --config kind-cluster-config.yaml --name my-kind-cluster

Verify the cluster:

kubectl get nodes
kubectl cluster-info

[!Note]
Here i add extraPortMappings for running Ingress

? Metallb Install

[!Note]
I am using Metallb for use LoadBalance. Suppose you are using Aws/Azure/DigitalOcean ect whose provide kubernates loadBalance facility then doesn't need Metallb. Here I buy VPS from a local company. They give one IP address to access VPS.

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.9/config/manifests/metallb-frr.yaml

Check Metallb configuration

kubectl get all -n metallb-system

?️ Create a metallb_config.yaml file:

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: first-pool
  namespace: metallb-system
spec:
  addresses:
  - 160.191.163.33-160.191.163.33

apply metallb_config.yaml file

kubectl apply -f metallb_config.yaml

[!Note]
MY VPS IP address is 160.191.163.33. Change this IP as your require

♻️ Ingress Install and configure

kubectl apply -f https://kind.sigs.k8s.io/examples/ingress/deploy-ingress-nginx.yaml

[!Note]
Here service/ingress-nginx-controller show EXTERNAL-IP is your VPS IP. My VPS IP is 160.191.163.33. It ensure that Our Metallb LoadBalance wroking.

? Helm Install and configure

curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
chmod 700 get_helm.sh

./get_helm.sh

Check Helm Version

helm version

?? Install and configure Cert Manager || SSL Certificate

sudo apt-get update

sudo apt-get install docker.io -y
sudo usermod -aG docker $USER && newgrp docker

Installing cert-manager CRDs

#!/bin/bash

# For AMD64 / x86_64
[ $(uname -m) = x86_64 ] && curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.26.0/kind-linux-amd64
chmod +x ./kind
sudo cp ./kind /usr/local/bin/kind

VERSION="v1.31.0"
URL="https://dl.k8s.io/release/${VERSION}/bin/linux/amd64/kubectl"
INSTALL_DIR="/usr/local/bin"

curl -LO "$URL"
chmod +x kubectl
sudo mv kubectl $INSTALL_DIR/
kubectl version --client

rm -f kubectl
rm -rf kind

echo "kind & kubectl installation complete."

https://artifacthub.io/packages/helm/cert-manager/cert-manager

? Project Deploy and Others

Step One

Clone the below Project in your VPS

./kind_kubectl_config.yaml

Step Two

Go to k8s folder and you can see this file

Step Three

Create Nampe Space

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4

nodes:
- role: control-plane
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP

Step Four

Apply all Secret file

kind create cluster --config kind-cluster-config.yaml --name my-kind-cluster

Step Five

Declear Mongodb Volumes and Others

kubectl get nodes
kubectl cluster-info

Step Six

Apply the Rest of Other file

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.9/config/manifests/metallb-frr.yaml

Step Seven

Configure SSL Certificate Domain. Open ssl_certificate.yaml and edit your desired domain name

Apply ssl_certificate.yaml file

kubectl get all -n metallb-system

Step Eight

Configure Ingress file. Open ingress.yaml and add your desired domain name.

Apply ingress.yaml file

apiVersion: metallb.io/v1beta1
kind: IPAddressPool
metadata:
  name: first-pool
  namespace: metallb-system
spec:
  addresses:
  - 160.191.163.33-160.191.163.33

Check Certificate

Check NameSpace

kubectl apply -f metallb_config.yaml

? Browser View

? Conclusion

Congratulations! You’ve successfully deployed the Full-Stack Chat Application . You can now access your Chat App.

? Monitoring and Others [Optional]

Now we are doing Extra features like Monitoring. It helps you learn about servers and apps.

Create Namespace

sudo apt-get update

sudo apt-get install docker.io -y
sudo usermod -aG docker $USER && newgrp docker

Check Namespace

[!Note]
This Namespace helping to control all monitoring app like- Prometheus, Grafana, Loki ect

Prometheus and Grafana Install and Configure

Install

#!/bin/bash

# For AMD64 / x86_64
[ $(uname -m) = x86_64 ] && curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.26.0/kind-linux-amd64
chmod +x ./kind
sudo cp ./kind /usr/local/bin/kind

VERSION="v1.31.0"
URL="https://dl.k8s.io/release/${VERSION}/bin/linux/amd64/kubectl"
INSTALL_DIR="/usr/local/bin"

curl -LO "$URL"
chmod +x kubectl
sudo mv kubectl $INSTALL_DIR/
kubectl version --client

rm -f kubectl
rm -rf kind

echo "kind & kubectl installation complete."

Run Prometheus Via Port

./kind_kubectl_config.yaml

now you can access Prometheus using this port. Like

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4

nodes:
- role: control-plane
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
- role: worker
  image: kindest/node:v1.31.2
  extraPortMappings:
  - containerPort: 80
    hostPort: 80
    protocol: TCP
  - containerPort: 443
    hostPort: 443
    protocol: TCP

[!Note]
Change IP Address

Grafana Install and Configure
Run Grafana Via Port

kind create cluster --config kind-cluster-config.yaml --name my-kind-cluster

Get Grafana Username and Password

UserName

kubectl get nodes
kubectl cluster-info

password

kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.14.9/config/manifests/metallb-frr.yaml

[!Note]
You can change password

Grafana Dashboard.

Here you can choose different type Algorithm Dashboard

That’s all. Happy Learning :) .
[if it is helpful, giving a star to the repository ?]

Project Github Link
https://github.com/kamruzzamanripon/k8-node-react-mongodb-app

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