#!/usr/bin/env bash
# install-kubernetes.sh
# Kubernetes — Automate deployment, scaling, and management of containerized workloads.
# Target: Ubuntu / Debian. Safe to re-run.
# Source guide: devops-hub/tools/kubernetes.html

set -euo pipefail

if [[ $EUID -eq 0 ]]; then
  echo "Run this as a regular sudo-capable user, not root." >&2
  exit 1
fi

echo "==> Download the signing key"
curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.31/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg

echo "==> Add the apt repository"
echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.31/deb/ /" | sudo tee /etc/apt/sources.list.d/kubernetes.list

echo "==> Install kubectl"
sudo apt-get update
sudo apt-get install -y kubectl

echo "==> Verify"
kubectl version --client

echo "==> Done. Kubernetes installation finished."