honeyDue API

Go REST API for the honeyDue property management platform. Powers iOS and Android mobile apps built with Kotlin Multiplatform.

Tech Stack

• Language: Go 1.25
• HTTP Framework: Echo v4
• ORM: GORM with PostgreSQL
• Background Jobs: Asynq (Redis-backed)
• Push Notifications: APNs (apns2) + FCM HTTP API
• Caching: Redis
• Logging: zerolog
• Configuration: Viper
• Admin Panel: Next.js (separate build target)

Prerequisites

• Go 1.25+ — install
• PostgreSQL 16+ — via Docker (recommended) or native install
• Redis 7+ — via Docker (recommended) or native install
• Docker & Docker Compose — install (recommended for local development)
• Make — pre-installed on macOS; apt install make on Linux

Getting Started on a New Machine

Option A: Docker (Recommended)

This starts PostgreSQL, Redis, the API server, background worker, and admin panel in containers using the self-contained dev compose file.

# 1. Clone the repo
git clone <repo-url>
cd honeyDueAPI-go

# 2. Create your environment file
cp .env.example .env
# Edit .env — at minimum set SECRET_KEY to a random 32+ char string

# 3. Build and start all services
make docker-dev

# 4. Seed the database with lookup data (required)
docker exec -i honeydue-db psql -U honeydue -d honeydue < seeds/001_lookups.sql

# 5. (Optional) Seed test data — creates test users, residences, tasks
docker exec -i honeydue-db psql -U honeydue -d honeydue < seeds/002_test_data.sql
docker exec -i honeydue-db psql -U honeydue -d honeydue < seeds/003_task_templates.sql

# 6. Verify the API is running
curl http://localhost:8000/api/health/

The API is now available at http://localhost:8000.

Option B: Run Locally (No Docker for the API)

Use Docker for PostgreSQL and Redis, but run the Go server natively for faster iteration.

# 1. Clone and enter the repo
git clone <repo-url>
cd honeyDueAPI-go

# 2. Install Go dependencies
make deps

# 3. Start PostgreSQL and Redis via Docker
docker compose -f docker-compose.dev.yml up -d db redis

# 4. Create your environment file
cp .env.example .env
# Edit .env:
#   - Set SECRET_KEY to a random 32+ char string
#   - Set DB_HOST=localhost
#   - Set DB_PORT=5433  (docker-compose maps 5433 externally)
#   - Set REDIS_URL=redis://localhost:6379/0

# 5. Seed the database
psql -h localhost -p 5433 -U honeydue -d honeydue < seeds/001_lookups.sql
psql -h localhost -p 5433 -U honeydue -d honeydue < seeds/002_test_data.sql
psql -h localhost -p 5433 -U honeydue -d honeydue < seeds/003_task_templates.sql

# 6. Run the API server
make run

# 7. (Optional) Run the background worker in a separate terminal
make run-worker

Option C: Fully Native (No Docker)

Install PostgreSQL and Redis natively on your machine.

# macOS with Homebrew
brew install postgresql@16 redis

# Start services
brew services start postgresql@16
brew services start redis

# Create the database
createdb honeydue

# Then follow Option B steps 2-7, using:
#   DB_HOST=localhost, DB_PORT=5432, POSTGRES_USER=<your-user>, POSTGRES_PASSWORD=<your-password>

Environment Variables

Copy .env.example to .env and configure:

Variable	Description	Default	Required
PORT	Server port	8000	No
DEBUG	Enable debug logging	true	No
SECRET_KEY	JWT signing secret (32+ chars)	—	Yes
POSTGRES_DB	Database name	honeydue	Yes
POSTGRES_USER	Database user	postgres	Yes
POSTGRES_PASSWORD	Database password	—	Yes
DB_HOST	Database host	localhost	Yes
DB_PORT	Database port	5432	Yes
REDIS_URL	Redis connection URL	redis://localhost:6379/0	Yes
EMAIL_HOST	SMTP server	smtp.gmail.com	For email
EMAIL_HOST_USER	SMTP username	—	For email
EMAIL_HOST_PASSWORD	SMTP app password	—	For email
APNS_AUTH_KEY_PATH	Path to APNs .p8 key file	—	For iOS push
APNS_AUTH_KEY_ID	APNs key ID	—	For iOS push
APNS_TEAM_ID	Apple Team ID	—	For iOS push
FCM_SERVER_KEY	Firebase server key	—	For Android push

Project Structure

honeyDueAPI-go/
├── cmd/
│   ├── api/main.go              # API server entry point
│   └── worker/main.go           # Background worker entry point
├── internal/
│   ├── config/                  # Viper configuration
│   ├── database/                # PostgreSQL connection setup
│   ├── models/                  # GORM models (map to PostgreSQL tables)
│   ├── repositories/            # Data access layer
│   ├── services/                # Business logic
│   ├── handlers/                # HTTP handlers (Echo)
│   ├── middleware/              # Auth, timezone, logging middleware
│   ├── router/                  # Route registration
│   ├── dto/                     # Request/Response DTOs
│   │   ├── requests/            # Incoming request structs
│   │   └── responses/           # Outgoing response structs
│   ├── task/                    # Centralized task logic
│   │   ├── predicates/          # IsCompleted, IsOverdue, etc.
│   │   ├── scopes/              # GORM query scopes
│   │   └── categorization/      # Kanban column assignment
│   ├── apperrors/               # Structured error types
│   ├── push/                    # APNs + FCM push notification clients
│   ├── worker/                  # Asynq background jobs
│   ├── i18n/                    # Internationalization (en, es, fr)
│   ├── validator/               # Input validation
│   ├── monitoring/              # Health checks
│   └── integration/             # Integration + contract tests
├── admin/                       # Next.js admin panel
├── migrations/                  # SQL migration files
├── seeds/                       # Seed data (lookups, test users)
├── templates/emails/            # Email templates
├── docs/                        # API docs, OpenAPI spec
├── docker-compose.yml           # Production / Docker Swarm config
├── docker-compose.dev.yml       # Self-contained local dev config
├── Dockerfile                   # Multi-stage build (api, worker, admin)
├── Makefile                     # Build, test, Docker commands
└── .env.example                 # Environment variable template

Development

Common Commands

make run              # Run API server
make run-worker       # Run background worker
make deps             # Install/tidy Go dependencies
make build            # Build API binary
make build-all        # Build API + worker binaries
make fmt              # Format code
make vet              # Vet code
make lint             # Run golangci-lint
make clean            # Remove build artifacts

Testing

make test             # Run all tests with race detection + coverage
make test-coverage    # Run tests and generate HTML coverage report
make contract-test    # Run route + KMP contract validation tests

# Run specific packages
go test ./internal/handlers -v
go test -run TestTaskHandler_CreateTask ./internal/handlers

Docker

Two compose files:

• docker-compose.dev.yml — self-contained local dev (build from source, container_name, depends_on, dev defaults)
• docker-compose.yml — production / Docker Swarm (image refs, deploy: sections, overlay network)

# Dev
make docker-dev       # Build and start all dev containers (foreground)
make docker-up        # Start dev containers (detached)
make docker-down      # Stop dev containers
make docker-logs      # Tail dev container logs
make docker-restart   # Restart dev containers

# Prod
make docker-build-prod  # Build production images (api, worker, admin)

Database Migrations

make migrate-up       # Apply pending migrations
make migrate-down     # Roll back last migration
make migrate-create name=add_column  # Create a new migration pair

Seed Data

Seed files in seeds/:

File	Purpose	Required
001_lookups.sql	Residence types, task categories, priorities, frequencies, contractor specialties	Yes
002_test_data.sql	Test users, residences, tasks, contractors, documents, notifications	Dev only
003_task_templates.sql	Pre-built task templates for onboarding	Dev only
003_admin_user.sql	Admin panel user	If using admin

Test Users

All test users have password: password123

Username	Email	Tier	Notes
admin	admin@example.com	Pro	Admin user
john	john@example.com	Pro	Owns 2 residences
jane	jane@example.com	Free	Owns 1 residence, shared access
bob	bob@example.com	Free	Owns 1 residence

API Documentation

• OpenAPI spec: docs/openapi.yaml (81 paths, 104 operations, 81 schemas)
• Health check: GET /api/health/
• Auth: POST /api/auth/login/, POST /api/auth/register/
• Static data: GET /api/static_data/ (ETag-cached lookups)

All protected endpoints require an Authorization: Token <token> header.

Production Deployment

Production runs on a 3-node K3s HA cluster on Hetzner Cloud, fronted by Cloudflare, with Neon Postgres, Backblaze B2, and a self-hosted Gitea container registry. See the full deployment book for every detail:

→ docs/deployment/ — The Deployment Book

26 chapters and ~42,000 words covering:

• Part I — The System: overview, Hetzner infrastructure, why K3s (and not Swarm, full Kubernetes, or Nomad)
• Part II — Networking: Flannel VXLAN, CoreDNS, kube-proxy, every UFW rule on every node, Cloudflare DNS setup
• Part III — Security: RBAC, Pod Security, secrets, TLS chain
• Part IV — Workloads: api, admin, worker, redis per-service deep dives; Neon Postgres config; Backblaze B2 storage; Gitea registry
• Part V — Operation: end-to-end data flow, deploy process, observability, failure modes, operator runbook
• Part VI — Context: cost breakdown, postmortem of the bugs from the Swarm→K3s migration, roadmap

Quick links:

• Runbook — docs/deployment/17-runbook.md — 22 common ops procedures
• kubectl cheat sheet — docs/deployment/appendices/b-commands.md
• Deploy process — docs/deployment/14-deployment-process.md — build → push → rollout
• Failure modes — docs/deployment/16-failure-modes.md — what happens when X dies
• Swarm postmortem — docs/deployment/19-postmortem-swarm.md — why we migrated

Operational state lives under:

• deploy-k3s/manifests/ — Kubernetes manifests (apply with kubectl)
• deploy-k3s/MIGRATION_NOTES.md — notes from the Swarm → K3s migration
• deploy/ — legacy Swarm config (retained temporarily; to be removed)

Related Projects

• Deployment Book: docs/deployment/ — full production operations reference
• Mobile App (KMM): ../HoneyDueKMM — Kotlin Multiplatform iOS/Android client
• Task Logic Docs: docs/TASK_LOGIC_ARCHITECTURE.md — required reading before task-related work
• Push Notification Docs: docs/PUSH_NOTIFICATIONS.md

License

Proprietary — honeyDue