Initial Lab Setup

bootstrap_node.sh

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+#!/bin/bash
+
+# Usage: ./bootstrap_node.sh <IP_ADDRESS> <NEW_HOSTNAME> <REMOTE_USER>
+IP=$1
+NEW_HOSTNAME=$2
+R_USER=${3:-pi} # Defaults to 'pi' if not specified
+
+echo "🚀 Bootstrapping $NEW_HOSTNAME at $IP..."
+
+# 1. Push SSH Keys (Mac -> Node)
+# This removes the need for passwords immediately
+ssh-copy-id -i ~/.ssh/id_ed25519.pub "$R_USER@$IP"
+
+# 2. Set Hostname and Passwordless Sudo
+# We use a single SSH command to minimize login prompts
+ssh -t "$R_USER@$IP" << EOF
+    sudo hostnamectl set-hostname $NEW_HOSTNAME
+    echo "$R_USER ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/010-$R_USER-nopasswd
+    sudo apt update && sudo apt install -y python3
+EOF
+
+echo "✅ $NEW_HOSTNAME is ready for Ansible!"
+
+# Append to inventory if not already there
+if ! grep -q "$NEW_HOSTNAME" inventory.ini; then
+    echo "$NEW_HOSTNAME ansible_host=$IP" >> inventory.ini
+    echo "Added $NEW_HOSTNAME to inventory.ini"
+fi