Create SSL/TLS Certificate for Ingress Controller and push to Kubernetes

create_self_signed_certificate.sh

#!/usr/bin/env bash

'''
USAGE:
  ./create_self_signed_certificate.sh <expiry_days> <namespace> <secret_name>
  
EXAMPLE:
  ./create_self_signed_certificate.sh 3650 ingress ingress-tls

SOURCE:
  https://www.learnitguide.net/2020/06/create-ssl-tls-certificate-ingress.html

DELETE:
  delete: kubectl -n $NAMESPACE delete secrets $SECRETNAME
'''

DAYS=$1
NAMESPACE=$2
SECRETNAME=$3

Country_Name=ES
State_Name=Catalunya
Locality=Barcelona
Organization="Example Co"
Common_Name=www.example.com

openssl req -x509 -nodes \
  -days $DAYS \
  -newkey rsa:2048 \
  -out ingress-tls.crt \
  -keyout ingress-tls.key \
  -subj "/C=$Country_Name/ST=$State_Name/L=$Locality/O=$Organization/CN=$Common_Name"

kubectl --namespace $NAMESPACE create secret tls $SECRETNAME --key ingress-tls.key --cert ingress-tls.crt