Claude
88aac103c9
fmd-server's image runs as a fixed, non-configurable UID:GID 1000:1000 baked into its own Dockerfile (useradd --uid 1000 fmd-server) - nothing like PUID/PGID to override it. The install script chowned the bind-mounted ./data dir to $ACTUAL_USER instead, which only happens to work when that user's host UID is coincidentally 1000. Confirmed live: the container crash-loops forever on "permission denied" creating its sqlite db otherwise - same root-cause shape as the Mattermost UID/GID bug fixed earlier this session, different fixed UID. Fixed at both points a container start can happen: the fresh-install path (chown -R 1000:1000 "$FMD_DIR/data" right after the existing $ACTUAL_USER chown, ordered after it since that one is recursive over the whole directory and would otherwise overwrite this) and the update path (previously unguarded - re-asserted before every docker compose up so a box already stuck in this state self-heals on next update instead of staying broken forever, same self-heal precedent as the Vaultwarden SMTP fix earlier this session). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01H4k6J1qXXyYxhGEgnJaMvn
430 lines
19 KiB
Bash
430 lines
19 KiB
Bash
#!/bin/bash
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# services/fmd.sh — FindMyDevice server for Android device tracking (FMD).
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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 fmd.sh
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# (Docker must already be installed when run standalone)
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#
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# Ported from ubuntu-post-install-24.04-crowdsec.sh (# ---- FINDMYDEVICE ----).
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# Own ~/docker/fmd/ with a standalone docker-compose.yml + .env.
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# Mobile app: "FMD" (by Nulide) on F-Droid — not the Google Find My Device app.
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#
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# Image: registry.gitlab.com/fmd-foss/fmd-server (GitLab's own registry, no
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# Docker Hub image exists). The project has moved twice — originally
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# nulide/findmydevice on Docker Hub, then gitlab.com/Nulide/findmydeviceserver,
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# now gitlab.com/fmd-foss/fmd-server — and was rewritten from Node.js to
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# Go+React along the way. Confirmed live: the old nulide/findmydevice image
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# no longer exists at all ("pull access denied"), so this service never
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# actually started on any box that installed it before this fix. The old
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# single shared FMD_ADMIN_PASSWORD model is gone too — the current server
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# uses per-user self-registration gated by an optional FMD_REGISTRATIONTOKEN,
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# and stores its database at /var/lib/fmd-server/db, not /fmd/data.
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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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port_in_use() {
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local _port="$1" _proto="${2:-tcp}"
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local _flag="-tlnH"
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[ "$_proto" = "udp" ] && _flag="-ulnH"
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ss "$_flag" "sport = :${_port}" 2>/dev/null | grep -q .
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}
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find_free_port() {
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local _varname="$1" _port="$2" _proto="${3:-tcp}"
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while port_in_use "$_port" "$_proto"; do
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_port=$((_port + 1))
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done
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eval "$_varname='$_port'"
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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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configure_caddy_for_service() {
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local _name="$1" _upstream="$2" _subdomain="$3" _extra="${4:-}"
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local _caddy_dir="$DOCKER_DIR/caddy"
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local _caddyfile="$_caddy_dir/Caddyfile"
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local _display_port="${_upstream##*:}"
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# Determine mode: local Caddy, remote Caddy, or none
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local _mode="none"
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[[ -d "$_caddy_dir" ]] && _mode="local"
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[[ -n "${CADDY_REMOTE_HOST:-}" ]] && [[ "$_mode" != "local" ]] && _mode="remote"
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[[ "$_mode" == "none" ]] && {
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log_info "Access $_name directly on port $_display_port."
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return 0
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}
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echo ""
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local _do_caddy=""
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if [[ "$_mode" == "remote" ]]; then
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log_info "Remote Caddy configured (${CADDY_REMOTE_HOST})."
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log_info "A snippet file will be saved to ~/docker/caddy-snippets/."
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fi
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read -r -p " Configure Caddy reverse proxy for $_name? [y/N]: " _do_caddy
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[[ "${_do_caddy,,}" == "y" ]] || {
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log_info "Skipping — access at: http://localhost:$_display_port"
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return 0
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}
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# Domain prompt — pre-fill from SITE_DOMAIN when available
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local _default_domain=""
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if [[ -n "${SITE_DOMAIN:-}" ]] && [[ "$SITE_DOMAIN" != "example.com" ]]; then
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_default_domain="${_subdomain}.${SITE_DOMAIN}"
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log_info "Default: $_default_domain"
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fi
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local _domain=""
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read -r -p " Domain [${_default_domain:-required}]: " _domain
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_domain="${_domain:-$_default_domain}"
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[[ -n "$_domain" ]] || { log_warning "No domain entered — skipping Caddy."; return 0; }
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# Build upstream — remote Caddy uses host IP:port, not container name
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local _block_upstream="$_upstream"
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if [[ "$_mode" == "remote" ]]; then
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_block_upstream="${CADDY_REMOTE_HOST}:${_display_port}"
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fi
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local _site_block
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_site_block="$(cat << CBLOCK
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# $_name
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${_domain} {
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reverse_proxy ${_block_upstream}
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header {
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Strict-Transport-Security "max-age=31536000; includeSubDomains; preload"
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X-Content-Type-Options "nosniff"
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X-Frame-Options "SAMEORIGIN"
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Referrer-Policy "strict-origin-when-cross-origin"
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}
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log {
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output file /var/log/caddy/${_domain}.log
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format json
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}
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${_extra}
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}
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CBLOCK
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)"
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if [[ "$_mode" == "local" ]]; then
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if [[ -f "$_caddyfile" ]]; then
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local _bk="$_caddy_dir/Caddyfile.backup.$(date +%Y%m%d-%H%M%S)"
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cp "$_caddyfile" "$_bk"
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log_info "Backed up Caddyfile to $(basename "$_bk")"
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else
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touch "$_caddyfile"
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fi
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if grep -q "^${_domain}" "$_caddyfile" 2>/dev/null; then
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log_warning "$_domain already in Caddyfile"
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local _ow=""
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read -r -p " Overwrite? [y/N]: " _ow
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[[ "${_ow,,}" == "y" ]] || { log_info "Keeping existing entry."; return 0; }
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sed -i "/^${_domain}/,/^}/d" "$_caddyfile"
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fi
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printf '%s\n' "$_site_block" >> "$_caddyfile"
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log_success "Added $_domain to Caddyfile"
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docker exec caddy caddy fmt --overwrite /etc/caddy/Caddyfile 2>/dev/null || true
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if docker exec caddy caddy reload --config /etc/caddy/Caddyfile 2>/dev/null; then
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log_success "$_name accessible at: https://$_domain"
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else
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log_warning "Reload failed — check: docker logs caddy"
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log_info "Manual reload: docker exec caddy caddy reload --config /etc/caddy/Caddyfile"
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fi
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else
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local _snippet_dir="$DOCKER_DIR/caddy-snippets"
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local _snippet_file="$_snippet_dir/${_subdomain}.caddy"
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mkdir -p "$_snippet_dir"
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printf '%s\n' "$_site_block" > "$_snippet_file"
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chown "$ACTUAL_USER:$ACTUAL_USER" "$_snippet_file" 2>/dev/null || true
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log_success "Snippet saved: $_snippet_file"
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log_info "Copy to Caddy machine:"
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log_info " scp $_snippet_file caddy-host:~/caddy-snippets/"
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log_info " rsync -av $_snippet_dir/ caddy-host:~/caddy-snippets/ (all at once)"
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fi
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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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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 fmd utilities "Android device tracking — alternative to Google Find My Device (FMD)" 8084
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install_fmd() {
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require_docker || return 1
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# ── Instance selection ───────────────────────────────────────────────────
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# First instance keeps the plain "fmd" name/paths/port exactly as before
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# (zero behavior change for anyone with a single instance). Only asking to
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# add a second one introduces suffixed naming — same pattern as
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# services/mattermost.sh and services/wordpress.sh.
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local FMD_DIR="$DOCKER_DIR/fmd"
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local INSTANCE_SUFFIX="" CONTAINER="fmd"
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local WEB_PORT="8084"
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if [ "$DRY_RUN" = true ]; then
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echo "[DRY-RUN] FindMyDevice would:"
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echo " - Offer to add a new, separate instance if one already exists"
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echo " - Create \$DOCKER_DIR/fmd(-<name>) with docker-compose.yml + .env (data/)"
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echo " - Generate a random registration token"
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echo " - Auto-scan for a free host port if this is an additional instance"
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echo " - Offer a Caddy reverse proxy and to start the container"
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return 0
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fi
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if [ -d "$FMD_DIR" ]; then
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echo ""
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echo " FindMyDevice is already installed at $FMD_DIR."
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echo " 1) Manage that install (update / full reinstall / cancel)"
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echo " 2) Add a NEW, separate FindMyDevice instance alongside it (its own"
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echo " server, password, and port — full isolation)"
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echo ""
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local _TOP_CHOICE=""
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prompt_text " Choice [1/2]:" "1" _TOP_CHOICE
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if [ "$_TOP_CHOICE" = "2" ]; then
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local _suffix=""
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while true; do
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prompt_text " Short name for the new instance (letters/numbers/hyphens, e.g. 'kids'):" "" _suffix
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_suffix="$(echo "$_suffix" | tr -cs 'a-zA-Z0-9-' '-' | sed 's/^-*//;s/-*$//')"
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if [ -z "$_suffix" ]; then
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log_warning "Name can't be empty."; continue
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fi
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if [ -d "$DOCKER_DIR/fmd-$_suffix" ]; then
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log_warning "fmd-$_suffix already exists — pick another name."; continue
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fi
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break
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done
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INSTANCE_SUFFIX="$_suffix"
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FMD_DIR="$DOCKER_DIR/fmd-$_suffix"
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CONTAINER="fmd-$_suffix"
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log_info "New instance: $FMD_DIR"
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else
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# "Manage that install" on THIS instance — the banner above promises
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# update/fresh/cancel, so actually offer it instead of falling straight
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# through into the same unconditional-overwrite flow as a new install.
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if [[ -f "$FMD_DIR/docker-compose.yml" ]]; then
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local MODE=""
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prompt_reinstall_mode MODE
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case "$MODE" in
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update)
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log_info "Refreshing the FindMyDevice image only — token, port, and Caddy config are left as-is."
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# fmd-server's image runs as a fixed, non-configurable
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# UID:GID 1000:1000 (confirmed against its own
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# Dockerfile — not something PUID/PGID or similar can
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# override). The bind-mounted ./data dir needs that
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# exact numeric ownership regardless of what host user
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# actually owns it; re-assert it on every update too,
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# not just at install time, so a box whose data/ was
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# ever chowned to something else (e.g. $ACTUAL_USER
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# not being UID 1000) self-heals instead of staying
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# stuck crash-looping on "permission denied" forever.
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[ -d "$FMD_DIR/data" ] && chown -R 1000:1000 "$FMD_DIR/data"
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( cd "$FMD_DIR" && docker compose pull && docker compose up -d ) \
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&& log_success "FindMyDevice image refreshed" \
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|| log_warning "Refresh failed — check: docker compose -f $FMD_DIR/docker-compose.yml logs"
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return 0
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;;
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cancel)
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log_info "Leaving the existing install as-is."
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return 0
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;;
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fresh) ;; # fall through to the full install flow below
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esac
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fi
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fi
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fi
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# Scan for a free port unconditionally — not just when adding an explicit
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# additional instance. A plain first install can just as easily collide
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# with an unrelated service that already claimed this default port — see
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# CLAUDE.md's "Port collision avoidance" section.
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find_free_port WEB_PORT "$WEB_PORT"
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mkdir -p "$FMD_DIR"
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ensure_docker_dir_ownership "$FMD_DIR"
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cd "$FMD_DIR" || return 1
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local FMD_TOKEN
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FMD_TOKEN=$(openssl rand -base64 16 | tr -dc 'a-zA-Z0-9' | head -c 16)
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# Mirrors configure_caddy_for_service's own mode resolution (lib/common.sh):
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# explicit CADDY_MODE from the site config wins, then a local ~/docker/caddy,
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# then the legacy CADDY_REMOTE_HOST var. Only "local" joins caddy_net — a
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# remote Caddy box can't resolve container names on this host's bridge
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# network anyway; it reaches this service via the host's published port.
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local _CADDY_MODE="${CADDY_MODE:-none}"
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[ "$_CADDY_MODE" = "none" ] && [ -d "$DOCKER_DIR/caddy" ] && _CADDY_MODE="local"
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[ "$_CADDY_MODE" = "none" ] && [ -n "${CADDY_REMOTE_HOST:-}" ] && _CADDY_MODE="remote"
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local _CADDY_NET_BLOCK=""
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local _CADDY_NET_SECTION=""
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if [ "$_CADDY_MODE" = "local" ]; then
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_CADDY_NET_BLOCK=" networks:
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- caddy_net
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"
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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 << FMD_COMPOSE
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name: $CONTAINER
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services:
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fmd:
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image: registry.gitlab.com/fmd-foss/fmd-server:0
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container_name: $CONTAINER
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hostname: $CONTAINER
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restart: unless-stopped
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environment:
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- FMD_REGISTRATIONTOKEN=\${FMD_REGISTRATIONTOKEN}
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volumes:
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- ./data:/var/lib/fmd-server/db
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ports:
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- "${WEB_PORT}:8080"
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${_CADDY_NET_BLOCK}${_CADDY_NET_SECTION}
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FMD_COMPOSE
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cat > .env << FMD_ENV
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FMD_REGISTRATIONTOKEN=$FMD_TOKEN
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CADDY_NET=$SITE_CADDY_NET
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FMD_ENV
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mkdir -p data
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chown -R "$ACTUAL_USER:$ACTUAL_USER" "$FMD_DIR"
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# fmd-server's image runs as a fixed, non-configurable UID:GID 1000:1000
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# (confirmed against its own Dockerfile: `useradd --uid 1000 fmd-server`,
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# baked in, not something an env var can override) — the bind mount at
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# ./data:/var/lib/fmd-server/db needs that exact numeric ownership on the
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# host side regardless of $ACTUAL_USER's actual UID, or the container
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# crash-loops on "permission denied" trying to create its sqlite db.
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# Confirmed live. Must run AFTER the chown above, not before, since that
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# one is recursive over the whole directory and would otherwise
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# overwrite this.
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chown -R 1000:1000 "$FMD_DIR/data"
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log_success "FindMyDevice${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)} configured at $FMD_DIR (port $WEB_PORT)"
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configure_caddy_for_service "FindMyDevice${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)}" "${CONTAINER}:8080" "fmd${INSTANCE_SUFFIX:+-$INSTANCE_SUFFIX}"
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write_readme "$FMD_DIR" << MD
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# FindMyDevice (FMD)${INSTANCE_SUFFIX:+ — $INSTANCE_SUFFIX}
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Self-hosted Android device tracking — locate, lock, or wipe your device
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from the web UI. Alternative to Google's Find My Device.
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$( [ -n "$INSTANCE_SUFFIX" ] && echo "
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This is a separate, fully isolated instance (own server, own password, own
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port) — not shared devices with another FindMyDevice instance.")
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- Web UI: http://localhost:${WEB_PORT}
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- Registration token: stored in \`.env\` (\`FMD_REGISTRATIONTOKEN\`) — the FMD
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app must supply this when creating an account on this server, so a
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stranger who finds the URL can't just self-register. Leave the \`.env\`
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value blank and restart if you'd rather allow open registration.
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- App data: \`data/\` (mounted at the container's own db path)
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## Manage
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\`\`\`bash
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cd $FMD_DIR
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docker compose up -d # start
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docker compose down # stop
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docker compose logs -f # logs
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docker compose pull && docker compose up -d # update
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\`\`\`
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## Mobile app
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Install **FMD** from **F-Droid** (search "Find My Device", by Nulide — not
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the Google "Find My Device" app):
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1. Open the app → create/register an account → Server URL →
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\`http://YOUR-SERVER-IP:${WEB_PORT}\`
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2. Enter the registration token from \`.env\` when prompted
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3. Grant location and accessibility permissions
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MD
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local START_FMD=""
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prompt_yn "Start FindMyDevice${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)} now? (y/n):" "y" START_FMD
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if [ "$START_FMD" = "y" ] || [ "$START_FMD" = "Y" ]; then
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docker compose up -d && log_success "FindMyDevice${INSTANCE_SUFFIX:+ ($INSTANCE_SUFFIX)} started" || log_warning "Failed to start — check: docker compose logs"
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fi
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echo ""
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echo " Access at: http://localhost:${WEB_PORT}"
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echo " Registration token: $FMD_TOKEN (saved in .env)"
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echo " Mobile app: FMD (by Nulide) on F-Droid"
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echo ""
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}
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# Run immediately when executed directly (deferred until after function definition)
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[[ "${_RUN_STANDALONE:-0}" == 1 ]] && install_fmd
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