Helm Printf Function

Step-01: Introduction

• printf: Returns a string based on a formatting string and the arguments to pass to it in order.

Step-02: Create a Named Template with printf function

{{/* Kubernetes Resource Name: String Concat with Hyphen */}}
{{- define "helmbasics.resourceName" }}
{{- printf "%s-%s" .Release.Name .Chart.Name }}
{{- end }}

Step-03: Call the named template in deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "helmbasics.resourceName" . }}-deployment 
  labels:

Step-04: Test the changes

# Change to Chart Directory 
cd helmbasics

# Helm Template Command
helm template myapp1 .

# Helm Install with dry-run command
helm install myapp1 . --dry-run

# Helm Install with --atomic flag
helm install myapp1 . --atomic

# Helm Uninstall
helm uninstall myapp1