create-helm.md

🚀 Lab 01-Creating a Helm Chart

estimated time: 15m

🎯 Objective

In this tutorial, we will learn how to create a Helm chart for deploying applications to Kubernetes.

📚 Instructions

1️⃣ Step 1: Initialize a Helm Chart

Cd to the Lab01 Folder on this Repo

cd  Lab01

To create a new Helm chart, run the following command:

helm create demo

2️⃣ Step 2: Modify Several Aspects of the Helm Manifest

1. Open Chart.yaml file and perform the following modifications :

   • our App version should be 3.0.0
   • our Helm Chart Version is 1.0.9

2. Open value.yaml and change the following :

   • We need 3 replicas of our deployment

   • Change the entire image section to

    image:
      acr: vipublicacr.azurecr.io
      repository: nginx
      tag: 1.25
      pullPolicy: IfNotPresent
   
   

3. Change the Chart Accordingly :

   Hint

   Search the code who is referncing .Values.image.repository
   Solution

   On Deployment.yaml , line 34 change to

   image: "{{ .Values.image.acr }}/{{ .Values.image.repository }}:{{ .Values.image.tag }}"
   

4. Remove the test directory , turn on Ingress

   Hint

   on the ingress.yaml file there is a condition that determines whether ingress should be installed

   {{- if .Values.ingress.enabled }}
   

   change the values file accordingly

3️⃣ Step 3: Install The Chart in Dry-Run Mode

still on your helm-ws\lab01 folder :

helm install demo .\demo --dry-run

Since Install command can only run once , we need a command to do "install or update" so we shall use :

helm upgrade demo ./demo --dry-run --install

4️⃣ Step 4: Install the Chat non-Dry Run

1. same as above but witout the --dry-run flag
2. Inspect all got installed

helm ls -a

kubectl get pods

3. Save The helm Manifest into single File

   helm get manifest demo > demo1.ymal