#!/bin/bash # services/caddy.sh — Caddy reverse proxy + automatic HTTPS. # Part of the modular post-install system (sourced by setup.sh). # # Can also be run standalone on any machine: # sudo bash caddy.sh # (Docker must already be installed when run standalone) # # Caddy is the front door for the homelab: it terminates TLS (automatic # Let's Encrypt certificates), reverse-proxies to your other services, and # writes JSON access logs that CrowdSec reads for intrusion prevention. # # Each web service adds its own site block to $CADDY_DIR/Caddyfile (the shared # configure_caddy_for_service helper does this automatically), then Caddy is # reloaded without downtime. # ── Standalone bootstrap ────────────────────────────────────────────────────── # Detected when the script is executed directly rather than sourced by setup.sh. # Sets up helpers and globals, then defers execution until after the function # definition at the bottom of this file. if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then [[ "$(id -u)" == "0" ]] || { echo "Run with sudo: sudo bash $0"; exit 1; } _SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" _COMMON="$_SELF_DIR/../lib/common.sh" if [[ -f "$_COMMON" ]]; then # Full repo present — use the real helpers (picks up ~/docker/.config too) # shellcheck source=../lib/common.sh source "$_COMMON" else # One-off copy — inline minimal stubs so the script works without the repo log_info() { echo -e "\033[0;34m[INFO]\033[0m $*"; } log_success() { echo -e "\033[0;32m[OK]\033[0m $*"; } log_warning() { echo -e "\033[1;33m[WARN]\033[0m $*"; } log_error() { echo -e "\033[0;31m[ERROR]\033[0m $*" >&2; } require_docker() { command -v docker &>/dev/null || { log_error "Docker not found. Install it first:" log_error " curl -fsSL https://get.docker.com | sudo sh" return 1 } docker compose version &>/dev/null || { log_error "Docker Compose plugin missing:" log_error " sudo apt-get install -y docker-compose-plugin" return 1 } } ensure_docker_dir_ownership() { chown -R "$ACTUAL_USER:$ACTUAL_USER" "$@" 2>/dev/null || true } # Match common.sh's eval-based pattern so local vars in install_* are set correctly prompt_text() { local _q="$1" _def="$2" _var="$3" _r [[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; } read -r -p " $_q " _r eval "$_var='${_r:-$_def}'" } prompt_yn() { local _q="$1" _def="$2" _var="$3" _r [[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; } read -r -p " $_q " _r eval "$_var='${_r:-$_def}'" } configure_caddy_for_service() { local _name="$1" _upstream="$2" _subdomain="$3" _extra="${4:-}" local _caddy_dir="$DOCKER_DIR/caddy" local _caddyfile="$_caddy_dir/Caddyfile" local _display_port="${_upstream##*:}" # Determine mode: local Caddy, remote Caddy, or none local _mode="none" [[ -d "$_caddy_dir" ]] && _mode="local" [[ -n "${CADDY_REMOTE_HOST:-}" ]] && [[ "$_mode" != "local" ]] && _mode="remote" [[ "$_mode" == "none" ]] && { log_info "Access $_name directly on port $_display_port." return 0 } echo "" local _do_caddy="" if [[ "$_mode" == "remote" ]]; then log_info "Remote Caddy configured (${CADDY_REMOTE_HOST})." log_info "A snippet file will be saved to ~/docker/caddy-snippets/." fi read -r -p " Configure Caddy reverse proxy for $_name? [y/N]: " _do_caddy [[ "${_do_caddy,,}" == "y" ]] || { log_info "Skipping — access at: http://localhost:$_display_port" return 0 } # Domain prompt — pre-fill from SITE_DOMAIN when available local _default_domain="" if [[ -n "${SITE_DOMAIN:-}" ]] && [[ "$SITE_DOMAIN" != "example.com" ]]; then _default_domain="${_subdomain}.${SITE_DOMAIN}" log_info "Default: $_default_domain" fi local _domain="" read -r -p " Domain [${_default_domain:-required}]: " _domain _domain="${_domain:-$_default_domain}" [[ -n "$_domain" ]] || { log_warning "No domain entered — skipping Caddy."; return 0; } # Build upstream — remote Caddy uses host IP:port, not container name local _block_upstream="$_upstream" if [[ "$_mode" == "remote" ]]; then _block_upstream="${CADDY_REMOTE_HOST}:${_display_port}" fi local _site_block _site_block="$(cat << CBLOCK # $_name ${_domain} { reverse_proxy ${_block_upstream} header { Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" X-Content-Type-Options "nosniff" X-Frame-Options "SAMEORIGIN" Referrer-Policy "strict-origin-when-cross-origin" } log { output file /var/log/caddy/${_domain}.log format json } ${_extra} } CBLOCK )" if [[ "$_mode" == "local" ]]; then if [[ -f "$_caddyfile" ]]; then local _bk="$_caddy_dir/Caddyfile.backup.$(date +%Y%m%d-%H%M%S)" cp "$_caddyfile" "$_bk" log_info "Backed up Caddyfile to $(basename "$_bk")" else touch "$_caddyfile" fi if grep -q "^${_domain}" "$_caddyfile" 2>/dev/null; then log_warning "$_domain already in Caddyfile" local _ow="" read -r -p " Overwrite? [y/N]: " _ow [[ "${_ow,,}" == "y" ]] || { log_info "Keeping existing entry."; return 0; } sed -i "/^${_domain}/,/^}/d" "$_caddyfile" fi printf '%s\n' "$_site_block" >> "$_caddyfile" log_success "Added $_domain to Caddyfile" docker exec caddy caddy fmt --overwrite /etc/caddy/Caddyfile 2>/dev/null || true if docker exec caddy caddy reload --config /etc/caddy/Caddyfile 2>/dev/null; then log_success "$_name accessible at: https://$_domain" else log_warning "Reload failed — check: docker logs caddy" log_info "Manual reload: docker exec caddy caddy reload --config /etc/caddy/Caddyfile" fi else local _snippet_dir="$DOCKER_DIR/caddy-snippets" local _snippet_file="$_snippet_dir/${_subdomain}.caddy" mkdir -p "$_snippet_dir" printf '%s\n' "$_site_block" > "$_snippet_file" chown "$ACTUAL_USER:$ACTUAL_USER" "$_snippet_file" 2>/dev/null || true log_success "Snippet saved: $_snippet_file" log_info "Copy to Caddy machine:" log_info " scp $_snippet_file caddy-host:~/caddy-snippets/" log_info " rsync -av $_snippet_dir/ caddy-host:~/caddy-snippets/ (all at once)" fi } write_readme() { local _dir="$1"; shift mkdir -p "$_dir" cat > "$_dir/README.md" } fi # Globals — ACTUAL_USER/ACTUAL_HOME must come before DOCKER_DIR # ($HOME under sudo is /root, not the real user's home) ACTUAL_USER="${ACTUAL_USER:-${SUDO_USER:-$USER}}" ACTUAL_HOME="$(getent passwd "$ACTUAL_USER" 2>/dev/null | cut -d: -f6 || echo "${HOME:-/root}")" DOCKER_DIR="${DOCKER_DIR:-$ACTUAL_HOME/docker}" DRY_RUN="${DRY_RUN:-false}" UNATTENDED="${UNATTENDED:-false}" SITE_TZ="${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}" SITE_DOMAIN="${SITE_DOMAIN:-example.com}" SITE_CADDY_NET="${SITE_CADDY_NET:-caddy_net}" register_service() { :; } # no-op — no wizard to register into _RUN_STANDALONE=1 fi # ───────────────────────────────────────────────────────────────────────────── register_service caddy homelab "Reverse proxy + automatic HTTPS (Caddy)" 443 install_caddy() { require_docker || return 1 log_info "Installing Caddy reverse proxy..." local CADDY_DIR="$DOCKER_DIR/caddy" echo "" echo "┌─────────────────────────────────────────────────────────────────┐" echo "│ CADDY - Modern Web Server & Reverse Proxy │" echo "│ Automatic HTTPS, reverse proxy for all your services │" echo "│ Port: 80 (HTTP), 443 (HTTPS) │" echo "└─────────────────────────────────────────────────────────────────┘" echo "" # ── DRY-RUN: describe the plan and bail before touching anything real ──── if [ "$DRY_RUN" = true ]; then echo "[DRY-RUN] Would create $CADDY_DIR (data/, config/)" echo "[DRY-RUN] Would write $CADDY_DIR/docker-compose.yml (ports 80/443 + HTTP/3)" echo "[DRY-RUN] Would write a starter $CADDY_DIR/Caddyfile (if none exists)" echo "[DRY-RUN] Would write $CADDY_DIR/README.md" echo "[DRY-RUN] Would optionally start Caddy (docker compose up -d)" return 0 fi # Reconfigure guard: warn if Caddy already looks installed. if [ -f "$CADDY_DIR/Caddyfile" ] || [ -f "$CADDY_DIR/docker-compose.yml" ]; then echo "" echo "⚠ Caddy appears to be already installed at $CADDY_DIR" local RECONFIGURE_CADDY="" prompt_yn "Do you want to reconfigure it? (y/n):" "n" RECONFIGURE_CADDY if [ "$RECONFIGURE_CADDY" != "y" ] && [ "$RECONFIGURE_CADDY" != "Y" ]; then echo " Skipping Caddy installation" return 0 fi fi mkdir -p "$CADDY_DIR/data" "$CADDY_DIR/config" ensure_docker_dir_ownership "$CADDY_DIR" # Backup existing Caddyfile if it exists if [ -f "$CADDY_DIR/Caddyfile" ]; then mkdir -p "$CADDY_DIR/backups" local BACKUP_FILE="$CADDY_DIR/backups/Caddyfile.backup.$(date +%Y%m%d_%H%M%S)" cp "$CADDY_DIR/Caddyfile" "$BACKUP_FILE" echo " ✓ Backed up existing Caddyfile to: $BACKUP_FILE" fi cd "$CADDY_DIR" || return 1 cat > docker-compose.yml << 'CADDY_COMPOSE' name: caddy services: caddy: image: caddy:latest container_name: caddy restart: unless-stopped ports: - "80:80" - "443:443" - "443:443/udp" # HTTP/3 volumes: - ./Caddyfile:/etc/caddy/Caddyfile - ./data:/data - ./config:/config - /var/log/caddy:/var/log/caddy environment: - ACME_AGREE=true labels: - "io.podman.annotations.label/crowdsec.enable=true" # Lets Caddyfile blocks reach services that use network_mode: host # (e.g. asterisk/asterisk-do) via "host.docker.internal:PORT" — Caddy # itself is on the caddy_net bridge network below, so plain "localhost" # in a site block resolves to Caddy's own container, not the host. extra_hosts: - "host.docker.internal:host-gateway" networks: - caddy_net networks: caddy_net: driver: bridge name: caddy_net CADDY_COMPOSE # Create Caddyfile if it doesn't exist if [ ! -f "Caddyfile" ]; then cat > Caddyfile << 'CADDYFILE' { # Global options admin off # Email for Let's Encrypt notifications # email admin@yourdomain.com } # Example configuration - edit this for your services # Uncomment and modify these examples: # ── Port reference ──────────────────────────────────────────────────────────── # Services on caddy_net → use the container name and INTERNAL port: # reverse_proxy myservice:80 (what the container listens on inside Docker) # # Accessing a service directly from another machine → use the HOST port: # http://server-ip:8085 (the left side of ports: "8085:80" in compose) # # The ports: mapping is only for direct host access. # Caddy bypasses it entirely and talks container-to-container. # ───────────────────────────────────────────────────────────────────────────── # ── Authelia SSO snippet (auto-added by installer if Authelia is installed) ─── # (authelia) { # forward_auth authelia:9091 { # uri /api/authz/forward-auth # copy_headers Remote-User Remote-Groups Remote-Name Remote-Email # } # } # # Authelia login portal # auth.yourdomain.com { # reverse_proxy authelia:9091 # } # # To protect any service with Authelia, add: import authelia # Example: # myservice.yourdomain.com { # import authelia # reverse_proxy container_name:port # } # ActualBudget # budget.yourdomain.com { # log { # output file /var/log/caddy/actualbudget-access.log # format json # level INFO # } # reverse_proxy actualbudget:5006 # header { # Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" # X-Frame-Options "SAMEORIGIN" # X-Content-Type-Options "nosniff" # X-XSS-Protection "1; mode=block" # Referrer-Policy "strict-origin-when-cross-origin" # } # } # Add more services here... CADDYFILE echo " ✓ Created example Caddyfile" else echo " ℹ Using existing Caddyfile" fi chown -R "$ACTUAL_USER:$ACTUAL_USER" "$CADDY_DIR" echo " ✓ Caddy configured at $CADDY_DIR" write_readme "$CADDY_DIR" << 'CADDY_README' # Caddy — reverse proxy + automatic HTTPS Caddy is the front door for this box. It: - Reverse-proxies incoming requests to your other services. - Obtains and renews TLS certificates automatically (Let's Encrypt / ZeroSSL), so every site is HTTPS with no manual cert wrangling. - Listens on **80** (HTTP, redirects to HTTPS) and **443** (HTTPS, incl. HTTP/3 on 443/udp). - Writes JSON access logs to `/var/log/caddy/` — these are what CrowdSec reads to detect and ban malicious traffic. ## Adding services Other services add their own **site blocks** to `./Caddyfile` (the installer's `configure_caddy_for_service` helper appends them automatically when you install a web service). You can also edit it by hand: ``` myservice.example.com { reverse_proxy container_name:1234 log { output file /var/log/caddy/myservice.example.com.log format json } } ``` **Port rule:** use the container's *internal* port, not the host-mapped port. If a service has `ports: "8085:80"` in its compose file, Caddy uses `:80` (container-to-container on `caddy_net`). The `8085` is only for direct host access from another machine. ## Reloading after edits Apply Caddyfile changes without downtime: ``` docker exec caddy caddy reload --config /etc/caddy/Caddyfile ``` ## Start / stop From this folder (`~/docker/caddy`): ``` docker compose up -d # start docker compose down # stop docker compose logs -f # follow logs ``` ## Where things live - Caddyfile: `~/docker/caddy/Caddyfile` (mounted at `/etc/caddy/Caddyfile`) - Access logs: `/var/log/caddy/*.log` (JSON; consumed by CrowdSec) - Certs/state: `~/docker/caddy/data` and `~/docker/caddy/config` - Backups of the Caddyfile: `~/docker/caddy/backups/` CADDY_README local START_CADDY="" prompt_yn "Start Caddy now? (y/n):" "y" START_CADDY if [ "$START_CADDY" = "y" ] || [ "$START_CADDY" = "Y" ]; then docker compose up -d 2>/dev/null && echo " ✓ Caddy started" || echo " ⚠ Failed to start Caddy" fi echo "" echo " Configuration file: $CADDY_DIR/Caddyfile" echo " Edit Caddyfile to add your domains and services" echo " Reload config: docker exec caddy caddy reload --config /etc/caddy/Caddyfile" echo "" echo " ⚠ IMPORTANT: Edit the Caddyfile to configure your domains!" echo " - Uncomment and modify the example configurations" echo " - Add your domain names" echo " - Configure services you want to expose" echo "" } # Run immediately when executed directly (deferred until after function definition) [[ "${_RUN_STANDALONE:-0}" == 1 ]] && install_caddy