first draft of script

install_docker_noble.sh

@@ -0,0 +1,77 @@
+#!/bin/bash
+
+set -euo pipefail
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+log_error() { echo -e "${RED}[ERROR]${NC} $1"; exit 1; }
+
+# Check if running as root
+if [[ $EUID -ne 0 ]]; then
+   log_error "This script must be run as root (use sudo)"
+fi
+
+# 1. Prerequisites
+log_info "Updating package index and installing prerequisites..."
+apt-get update
+apt-get install -y ca-certificates curl gnupg lsb-release
+
+# 2. Add Docker's official GPG key
+log_info "Adding Docker's official GPG key..."
+install -m 0755 -d /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+chmod a+r /etc/apt/keyrings/docker.gpg
+
+# 3. Set up the repository
+log_info "Setting up the Docker repository..."
+echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
+
+# 4. Install Docker Engine and CLI
+log_info "Installing Docker Engine, CLI, and Containerd..."
+apt-get update
+apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+
+# Note: Docker Compose V2 is now installed as a plugin (docker compose), 
+# not the standalone binary (docker-compose).
+
+# 5. Enable and Start Docker Service
+log_info "Enabling and starting Docker service..."
+systemctl enable docker.service
+systemctl enable containerd.service
+systemctl start docker
+
+# 6. Add current user to docker group
+# We detect the user running the script (sudo user) or the first non-root user
+CURRENT_USER="${SUDO_USER:-$(whoami)}"
+if id -nG "$CURRENT_USER" | grep -qw "docker"; then
+    log_info "User '$CURRENT_USER' is already in the docker group."
+else
+    log_info "Adding user '$CURRENT_USER' to the docker group..."
+    usermod -aG docker "$CURRENT_USER"
+    log_warn "You must log out and log back in (or run 'newgrp docker') for group changes to take effect."
+fi
+
+# 7. Verification
+log_info "Verifying installation..."
+if docker --version >/dev/null 2>&1; then
+    log_info "Docker installed successfully: $(docker --version)"
+else
+    log_error "Docker installation verification failed."
+fi
+
+if docker compose version >/dev/null 2>&1; then
+    log_info "Docker Compose Plugin installed successfully: $(docker compose version)"
+else
+    log_error "Docker Compose installation verification failed."
+fi
+
+log_info "Installation complete!"
+log_warn "Remember to run 'sudo usermod -aG docker $CURRENT_USER' if you didn't run as the correct user, and then log out/in."