HELM

Apache Helm Chart

This Helm chart deploys an Apache HTTP Server on a Kubernetes cluster.

Prerequisites

• Kubernetes cluster running (local, cloud, or KIND).
• kubectl installed and configured.
• Helm 3 installed. Install Helm with:

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

Chart Structure

apache/
├── Chart.yaml         # Chart metadata
├── values.yaml        # Default values for customization
└── templates/         # Kubernetes resource templates
    ├── deployment.yaml
    └── service.yaml

• Installation

Clone or navigate to the Helm chart directory.

Package the chart:

helm package .

Install the Helm chart:

helm install apache ./apache --namespace apache-namespace --create-namespace

Default Configuration The chart deploys an Apache HTTP Server with the following default values (from values.yaml):

replicaCount: 2

image:
  repository: httpd
  tag: 2.4
  pullPolicy: IfNotPresent

service:
  type: ClusterIP
  port: 80

resources:
  requests:
    memory: "64Mi"
    cpu: "100m"
  limits:
    memory: "128Mi"
    cpu: "200m"

You can customize these values by modifying values.yaml or passing them via the --set flag during installation.

Accessing the Deployment Check the status of your pods and services:

kubectl get pods -n apache-namespace
kubectl get svc -n apache-namespace

Forward the service port to access Apache locally:

kubectl port-forward svc/apache 8080:80 -n apache-namespace

Open your browser and visit:

http://localhost:8080

Uninstallation To remove the deployment and associated resources:

helm uninstall apache -n apache-namespace
kubectl delete namespace apache-namespace

Customizing the Chart You can override default values using the --set flag. For example:

helm install apache ./apache \
  --namespace apache-namespace \
  --set replicaCount=3 \
  --set image.tag=2.4.53 \
  --set service.type=LoadBalancer

Alternatively, modify the values.yaml file directly.

Features

• Scalable: Set replicaCount to scale the number of pods.
• Configurable Resources: Customize CPU/memory requests and limits.
• Customizable Service: Supports ClusterIP, NodePort, or LoadBalancer service types.

Troubleshooting

Verify Helm and Kubernetes versions:

helm version
kubectl version

Check Helm release status:

helm status apache -n apache-namespace

Inspect pod logs:

kubectl logs <apache-pod-name> -n apache-namespace