AlertLoop

AlertLoop is a self-hosted event, incident, and business notification center for software teams and operations-heavy businesses.

It helps applications send important technical incidents and business events into one reliable place, track their status, and deliver them through channels such as email, Telegram, and webhooks. Planned paid editions will add channels such as WhatsApp.

Product Direction

AlertLoop starts as a self-hosted product. Cloud SaaS is intentionally deferred until the core product and market positioning are validated.

Editions

• Community (this repository): free, self-hosted, backend API, Swagger/OpenAPI, basic events list page, Email/Telegram/Webhook delivery, delivery retries and dead-letter replay, SQLite and PostgreSQL.
• Pro Self-hosted (planned, paid): multi-project, routing rules, SDKs, WhatsApp, Telegram fallback/proxy, RBAC, longer retention, escalation policies.
• Enterprise (planned, paid): on-prem license, SSO, HA, audit, custom adapters, support.

Features (Community)

• Events API with API-key auth and OpenAPI/Swagger.
• Three event families: incident, business_event, audit.
• Event lifecycle: new, acknowledged, resolved, muted, escalated (with a manual escalate action).
• Idempotent ingestion via dedupe_key.
• Delivery channels: Email (SMTP), Telegram, Webhook (HMAC-signed).
• Delivery worker with retries, exponential backoff, dead-letter, and replay.
• Delivery attempt history, separate from event state.
• Simple events web page protected by an admin token.
• Cursor-paginated list endpoints.
• Structured logs (text or JSON), to stdout or a file.
• 30-day event retention.

Requirements

• Go: 1.25 or newer — only to build from source. Release binaries are static and need no runtime; there is no CGO dependency.
• PostgreSQL (production): 12 or newer (14+ recommended, tested on 16). Uses JSONB, partial indexes, and FOR UPDATE SKIP LOCKED.
• SQLite (local/demo): none — it is embedded (pure-Go driver). Just a file.
• Docker (optional): any recent Docker Engine with Compose v2 for the container deployment path.

Quick Start

Docker Compose (demo, SQLite)

docker compose up -d

Then open:

• API docs: http://localhost:8080/swagger
• Events page: http://localhost:8080/events?token=change-me-admin (admin token)

Prebuilt binary

Download a release binary (linux/amd64, linux/arm64; darwin/windows for local evaluation), then run all-in-one mode backed by SQLite:

./alertloop --config alertloop.yaml all

To install as a systemd service, see deploy/systemd/ (install.sh).

From source

make run                 # build + run all-in-one on :8080 (SQLite)
make test                # run the test suite

Send your first event

The API accepts your admin token (full access) or a scoped API key. For a quick test, use the admin token from your config:

curl -X POST http://localhost:8080/v1/events \
  -H "X-API-Key: change-me-admin" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "incident",
    "severity": "critical",
    "source": "feeds_worker",
    "message": "Feed processing failed",
    "dedupe_key": "feeds:developer:15:flats"
  }'

For real integrations, create least-privilege API keys with a scope (ingest for event sources, read for dashboards, full for trusted tools) in the config file — see alertloop.example.yaml.

Runtime Modes

The single alertloop binary runs in three modes:

• server — HTTP API and web UI.
• worker — delivery workers and retention cleanup.
• all — both in one process (default; ideal for small installs).

Admin console

AlertLoop ships a React admin console (Overview, Events, Event detail, Deliveries with dead-letter replay, About). It is embedded in the binary and served at /admin on the same origin as the API — nothing extra to install or run. Whether you use the prebuilt binary or Docker Compose, just open /admin:

• Local: http://localhost:8080/admin
• Remote server: http://<server-ip>:8080/admin, or your domain behind a proxy (see Access over a domain).

Sign in with the admin token from your config (there are no user accounts in Community). The token is kept in the browser's session storage and sent to the API. Because the console is same-origin with the API, it works at any host or domain with no rebuild and no CORS configuration.

The console has a light responsive layout: on phones the sidebar collapses into a menu and wide tables scroll horizontally. A full mobile experience is not a Community goal — use a desktop browser for day-to-day work.

Developing the console

cd web/admin
npm install
npm run dev        # http://localhost:5273, proxies /v1 to localhost:8080

Build it into the binary with make admin (outputs to internal/adminui/dist, which the Go build embeds). The Docker image build does this automatically, so go build and docker build both produce a binary/image with the console already inside.

Access over a domain (HTTPS)

AlertLoop listens on :8080 (all interfaces), so on a server it is reachable at http://<server-ip>:8080. For a real domain, put an HTTPS reverse proxy in front — AlertLoop itself speaks plain HTTP and does not terminate TLS. Since the API, admin console, and Swagger are all one origin, a single proxy rule covers everything:

[browser] --HTTPS--> [nginx/Apache :443] --HTTP--> [alertloop 127.0.0.1:8080]

Then everything is on your domain, same-origin, no CORS:

• https://alerts.example.com/admin — admin console
• https://alerts.example.com/v1/... — API
• https://alerts.example.com/swagger — API docs

Ready-to-adapt configs are in deploy/proxy/:

• nginx — deploy/proxy/nginx.conf
• Apache — deploy/proxy/apache.conf

Both redirect HTTP→HTTPS and forward to 127.0.0.1:8080. Get a certificate with Let's Encrypt (certbot). HTTPS is required in production — the admin token travels with each request and must not go over plaintext HTTP.

Database

SQLite (local/demo)

Point the DSN at a file path; AlertLoop creates the file and its tables automatically on first run. :memory: is supported for throwaway runs.

database:
  driver: sqlite
  dsn: alertloop.db

PostgreSQL (production)

AlertLoop connects to an existing database and creates/updates only its own tables (events, delivery_attempts, schema_migrations) via migrations that run automatically at startup. It does not create the database itself — the target database must already exist (this is standard PostgreSQL client behavior: you cannot connect to a database that has not been created).

Create the database once:

createdb -U postgres alertloop
#   or:  psql -U postgres -c "CREATE DATABASE alertloop;"

Then point AlertLoop at it. With the binary, put it in your config file (e.g. alertloop.yaml) — this is the only part you change to switch from SQLite to PostgreSQL:

database:
  driver: postgres
  dsn: "postgres://USER:PASSWORD@HOST:5432/alertloop?sslmode=require"

./alertloop --config alertloop.yaml all

(Or via environment variables instead of the file: ALERTLOOP_DB_DRIVER=postgres ALERTLOOP_DB_DSN="postgres://…" ./alertloop all.) Use sslmode=require for a remote database; sslmode=disable is only for a local/private-network Postgres.

Using an existing/shared database is fine: AlertLoop only touches its own tables and never drops or alters unrelated tables. Just make sure no other application uses tables named events, delivery_attempts, or schema_migrations in that database. (A configurable table prefix/schema is on the roadmap for shared databases.)

Logs

AlertLoop writes structured logs. By default they go to stdout; set a file path to also persist them for external tools.

log:
  level: "info"     # debug | info | warn | error
  format: "text"    # text (human-readable) | json (for Loki/Elasticsearch/Vector)
  file: ""          # empty = stdout; e.g. /var/log/alertloop/alertloop.log

How to read logs by deployment:

• Binary (stdout): run in a terminal, or redirect: ./alertloop all >> alertloop.log 2>&1.
• Binary (file): set log.file (or ALERTLOOP_LOG_FILE) and read it with any tool: tail -f /var/log/alertloop/alertloop.log.
• systemd: logs go to the journal — journalctl -u alertloop -f. Set format: json for machine-readable output that log shippers can parse.
• Docker: docker compose logs -f alertloop (or docker logs).

For centralized logging, set format: json and point your log collector at the file or the container's stdout.

Configuration

Precedence (highest wins): command flags → environment variables → YAML config file → built-in defaults. See alertloop.example.yaml and .env.example for the full list.

Delivery channels are optional

You can run AlertLoop with no channels configured — it will accept and store events (visible in the API and at /admin) and simply deliver nothing. This is the default in the example configs, so the app starts out of the box. To send notifications, configure one or more channels (email/telegram/webhook) in the YAML file. If you enable a channel you must fill in all of its required fields, or startup fails with a clear message (this catches typos like a missing bot_token).

Every event is delivered to every configured channel — Community has no per-event routing (that is a paid capability).

Split deployments (separate server + worker)

The channel configuration is used by both roles: the server decides which delivery jobs to create when an event arrives, and the worker performs the actual sending. Both processes must load the same channel configuration — if the server has no channels, no delivery jobs are created and nothing is ever sent (it will log a prominent warning at startup).

The PostgreSQL Compose profile (deploy/docker/docker-compose.postgres.yml) does this correctly by mounting a single alertloop.yaml into both the api and worker containers — one source of truth, no drift. To use it:

cd deploy/docker
cp alertloop.yaml.example alertloop.yaml    # set admin_token; api_keys & channels optional
docker compose -f docker-compose.postgres.yml up -d

The single-process all mode (and the SQLite demo) has no such split and needs no special handling.

API

The OpenAPI contract lives at api/openapi.yaml and is served live at /openapi.yaml, with Swagger UI at /swagger. Full product documentation will be published on a dedicated documentation site.

Releases and building

Download a prebuilt binary for your OS/arch from the repository's GitHub Releases page — pick linux_amd64, linux_arm64, darwin_arm64, windows_amd64, etc., unpack, and run. Each release also ships a checksums_*.txt to verify the download.

You do not need a Windows machine to get a Windows binary (or a Mac for a Mac binary). AlertLoop is CGO-free (pure-Go SQLite), so it cross-compiles — a single build machine produces every OS/arch at once. Releases are built automatically by CI when a version tag is pushed (.github/workflows/release.yml), which builds the admin UI, cross-compiles all targets, and uploads them to the GitHub Release.

To build the release artifacts yourself:

make admin                 # build the embedded admin UI (needs Node)
make release               # cross-compile all targets into dist/
#   equivalently: VERSION=v0.1.0 ./scripts/build-release.sh

For a single local binary for your own machine, just make build (Go only).

Production notes

• TLS: AlertLoop serves plain HTTP and is designed to run behind an HTTPS reverse proxy (nginx, Caddy, Traefik). Terminate TLS there and forward to the container/port.
• External PostgreSQL: use sslmode=require (or stricter) in the DSN. The bundled Compose Postgres uses sslmode=disable only because it is on a private Docker network.
• Rate limiting is on by default (rate_limit in the config). If your proxy already rate limits, you can disable it here.
• SMTP: set starttls: true (required upgrade, port 587) or tls: true (implicit TLS / SMTPS, port 465). AlertLoop will not send mail in plaintext when TLS is requested but unavailable.
• Secrets: never commit real alertloop.yaml / .env (they are gitignored); keep the *.example templates only.

License

Community Edition is licensed under AGPL-3.0-only (see LICENSE and NOTICE). Planned Pro and Enterprise editions will be offered under a separate commercial license.