Claude
68a4effad5
Only include the caddy_net network block in docker-compose.yml when ~/docker/caddy exists, preventing "network not found" errors on standalone installs without Caddy. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs
265 lines
8.9 KiB
Bash
265 lines
8.9 KiB
Bash
#!/bin/bash
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# services/watchtower.sh — Watchtower automatic container update monitoring.
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# Part of the modular post-install system (sourced by setup.sh).
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#
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# Can also be run standalone on any machine:
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# sudo bash watchtower.sh
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# (Docker must already be installed when run standalone)
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# ── Standalone bootstrap ──────────────────────────────────────────────────────
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# Detected when the script is executed directly rather than sourced by setup.sh.
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# Sets up helpers and globals, then defers execution until after the function
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# definition at the bottom of this file.
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if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
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[[ "$(id -u)" == "0" ]] || { echo "Run with sudo: sudo bash $0"; exit 1; }
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_SELF_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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_COMMON="$_SELF_DIR/../lib/common.sh"
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if [[ -f "$_COMMON" ]]; then
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# Full repo present — use the real helpers (picks up ~/docker/.config too)
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# shellcheck source=../lib/common.sh
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source "$_COMMON"
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else
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# One-off copy — inline minimal stubs so the script works without the repo
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log_info() { echo -e "\033[0;34m[INFO]\033[0m $*"; }
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log_success() { echo -e "\033[0;32m[OK]\033[0m $*"; }
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log_warning() { echo -e "\033[1;33m[WARN]\033[0m $*"; }
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log_error() { echo -e "\033[0;31m[ERROR]\033[0m $*" >&2; }
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require_docker() {
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command -v docker &>/dev/null || {
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log_error "Docker not found. Install it first:"
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log_error " curl -fsSL https://get.docker.com | sudo sh"
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return 1
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}
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docker compose version &>/dev/null || {
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log_error "Docker Compose plugin missing:"
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log_error " sudo apt-get install -y docker-compose-plugin"
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return 1
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}
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}
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ensure_docker_dir_ownership() {
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chown -R "$ACTUAL_USER:$ACTUAL_USER" "$@" 2>/dev/null || true
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}
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# Match common.sh's eval-based pattern so local vars in install_* are set correctly
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prompt_text() {
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local _q="$1" _def="$2" _var="$3" _r
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[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
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read -r -p " $_q " _r
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eval "$_var='${_r:-$_def}'"
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}
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prompt_yn() {
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local _q="$1" _def="$2" _var="$3" _r
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[[ "${UNATTENDED:-false}" == "true" ]] && { eval "$_var='$_def'"; return; }
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read -r -p " $_q " _r
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eval "$_var='${_r:-$_def}'"
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}
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write_readme() {
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local _dir="$1"; shift
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mkdir -p "$_dir"
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cat > "$_dir/README.md"
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}
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fi
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# Globals — ACTUAL_USER/ACTUAL_HOME must come before DOCKER_DIR
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# ($HOME under sudo is /root, not the real user's home)
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ACTUAL_USER="${ACTUAL_USER:-${SUDO_USER:-$USER}}"
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ACTUAL_HOME="$(getent passwd "$ACTUAL_USER" 2>/dev/null | cut -d: -f6 || echo "${HOME:-/root}")"
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DOCKER_DIR="${DOCKER_DIR:-$ACTUAL_HOME/docker}"
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DRY_RUN="${DRY_RUN:-false}"
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UNATTENDED="${UNATTENDED:-false}"
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SITE_TZ="${SITE_TZ:-$(cat /etc/timezone 2>/dev/null || echo UTC)}"
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SITE_DOMAIN="${SITE_DOMAIN:-example.com}"
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SITE_CADDY_NET="${SITE_CADDY_NET:-caddy_net}"
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CADDY_REMOTE_HOST="${CADDY_REMOTE_HOST:-}"
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register_service() { :; } # no-op — no wizard to register into
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_RUN_STANDALONE=1
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fi
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# ─────────────────────────────────────────────────────────────────────────────
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register_service watchtower utilities "Automatic container updates (Watchtower)"
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install_watchtower() {
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require_docker || return 1
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log_info "Installing Watchtower..."
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local WT_DIR="$DOCKER_DIR/watchtower"
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if [ "$DRY_RUN" = true ]; then
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echo "[DRY-RUN] Would create $WT_DIR"
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return 0
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fi
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mkdir -p "$WT_DIR" 2>/dev/null || true
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ensure_docker_dir_ownership "$WT_DIR"
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cd "$WT_DIR" 2>/dev/null || cd "$DOCKER_DIR" || return 1
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# Ask about mode
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echo ""
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echo "Watchtower Mode:"
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echo " [M] Monitor only - Get notifications about available updates (SAFE)"
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echo " [A] Auto-update - Automatically pull and restart containers (RISKY)"
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echo ""
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echo " ⚠️ Auto-update can break apps like Immich that need DB migrations!"
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echo " Recommendation: Use monitor mode, update manually when ready."
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echo ""
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local WT_MODE="M"
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prompt_text "Mode [M/A]:" "M" WT_MODE
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WT_MODE=$(echo "$WT_MODE" | tr '[:lower:]' '[:upper:]')
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local MONITOR_ONLY
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if [ "$WT_MODE" = "A" ]; then
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MONITOR_ONLY="false"
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echo " Mode: Auto-update (containers will be updated automatically)"
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else
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MONITOR_ONLY="true"
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echo " Mode: Monitor only (you'll be notified of updates)"
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fi
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# Check for ntfy
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local NTFY_URL=""
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if [ -d "$DOCKER_DIR/ntfy" ]; then
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echo " ✓ ntfy detected - configuring notifications"
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NTFY_URL="http://ntfy/watchtower"
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fi
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local _CADDY_NET_BLOCK=""
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if [ -d "$DOCKER_DIR/caddy" ]; then
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_CADDY_NET_BLOCK=" networks:
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- caddy_net
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"
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fi
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local _CADDY_NET_SECTION=""
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if [ -d "$DOCKER_DIR/caddy" ]; then
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_CADDY_NET_SECTION="
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networks:
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caddy_net:
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external: true
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name: ${SITE_CADDY_NET:-caddy_net}
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"
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fi
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cat > docker-compose.yml << WT_COMPOSE
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name: watchtower
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services:
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watchtower:
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image: containrrr/watchtower:latest
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container_name: watchtower
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hostname: watchtower
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restart: unless-stopped
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environment:
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# Check for updates daily at 4 AM
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- WATCHTOWER_SCHEDULE=0 0 4 * * *
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# Monitor only - don't auto-update (change to false for auto-update)
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- WATCHTOWER_MONITOR_ONLY=${MONITOR_ONLY}
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# Cleanup old images after update
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- WATCHTOWER_CLEANUP=true
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# Include stopped containers
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- WATCHTOWER_INCLUDE_STOPPED=true
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# Notification URL (ntfy, Discord, Slack, etc.)
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- WATCHTOWER_NOTIFICATION_URL=\${NOTIFICATION_URL:-}
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# Show debug info
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- WATCHTOWER_DEBUG=false
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock:ro
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${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
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WT_COMPOSE
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# Create .env
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cat > .env << WT_ENV
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# Watchtower Configuration
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# =========================
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#
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# Monitor-only mode: Watchtower checks for updates but doesn't apply them.
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# This is SAFER because some apps (Immich, Mealie) have database migrations
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# that can break if you update without proper procedures.
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#
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# To update manually:
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# cd ~/docker/{app}
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# docker compose pull
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# docker compose up -d
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# Set to "false" to enable auto-updates (RISKY!)
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MONITOR_ONLY=$MONITOR_ONLY
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# Notification URL (optional)
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# Examples:
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# ntfy: ntfy://ntfy.example.com/watchtower
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# Discord: discord://token@id
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# Slack: slack://hook-url
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# Gotify: gotify://hostname/token
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#
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# Full list: https://containrrr.dev/shoutrrr/services/overview/
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NOTIFICATION_URL=$NTFY_URL
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CADDY_NET=$SITE_CADDY_NET
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WT_ENV
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chown -R "$ACTUAL_USER:$ACTUAL_USER" "$WT_DIR" 2>/dev/null || true
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echo ""
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log_success "Watchtower installed at $WT_DIR"
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write_readme "$WT_DIR" << MD
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# Watchtower
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Monitors running containers for image updates. Defaults to NOTIFY-ONLY mode,
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because apps like Immich can have breaking DB migrations on auto-update.
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## No web interface
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Watchtower has no web UI/port. It runs in the background and checks for updates
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daily at 4 AM.
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## Configuration
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- Mode: $([ "$MONITOR_ONLY" = "true" ] && echo "Monitor only" || echo "Auto-update") (set MONITOR_ONLY in .env; "false" = auto-update)
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- Notifications: set NOTIFICATION_URL in .env (ntfy, Discord, Slack, Gotify, ...)
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See https://containrrr.dev/shoutrrr/services/overview/
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## Exclude a container
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Add this label to any container you want Watchtower to ignore:
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\`com.centurylinklabs.watchtower.enable=false\`
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## Update an app manually
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\`\`\`
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cd ~/docker/<app>
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docker compose pull
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docker compose up -d
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\`\`\`
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## Manage
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\`\`\`
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cd $WT_DIR
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docker compose up -d # start
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docker compose down # stop
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docker compose logs -f # logs
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\`\`\`
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MD
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local START_WATCHTOWER=""
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prompt_yn "Start Watchtower now? (y/n):" "y" START_WATCHTOWER
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if [ "$START_WATCHTOWER" = "y" ] || [ "$START_WATCHTOWER" = "Y" ]; then
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docker compose up -d 2>/dev/null && log_success "Watchtower started" || log_warning "Failed to start"
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fi
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echo " Mode: $([ "$MONITOR_ONLY" = "true" ] && echo "Monitor only" || echo "Auto-update")"
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echo ""
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echo " Checks for updates daily at 4 AM."
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if [ -n "$NTFY_URL" ]; then
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echo " Notifications: $NTFY_URL"
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else
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echo " Configure NOTIFICATION_URL in .env for alerts."
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fi
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echo ""
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echo " To exclude a container from Watchtower:"
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echo " Add label: com.centurylinklabs.watchtower.enable=false"
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echo ""
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}
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[[ "${_RUN_STANDALONE:-0}" == 1 ]] && install_watchtower
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