---
phase: 01-core-infrastructure-security
plan: 04
subsystem: infra
tags: [caddy, https, tls, postgres, backup, cron, security]

# Dependency graph
requires:
  - phase: 01-02
    provides: PostgreSQL database container for backup
provides:
  - Caddy reverse proxy with automatic HTTPS
  - HTTP to HTTPS redirect
  - Security headers (HSTS, X-Content-Type-Options, X-Frame-Options)
  - PostgreSQL backup script with 30-day retention
  - Weekly backup restore test automation
affects: [production-deployment, disaster-recovery]

# Tech tracking
tech-stack:
  added: [caddy:2-alpine]
  patterns: [reverse-proxy, tls-termination, database-backup]

key-files:
  created:
    - Caddyfile
    - scripts/backup-postgres.sh
    - scripts/cron/postgres-backup
    - .gitignore
  modified:
    - docker-compose.yml

key-decisions:
  - "Self-signed TLS (tls internal) for local development"
  - "Host network mode for Caddy to reach localhost:8000"
  - "Daily backups at 2 AM with 30-day retention"
  - "Weekly restore test on Mondays for backup validation"
  - "pg_dump custom format (-Fc) for selective restore capability"

patterns-established:
  - "Caddy as reverse proxy: All HTTPS termination at Caddy layer"
  - "Database backup: Docker exec pg_dump to host filesystem"
  - "Backup verification: pg_restore --list to validate archive integrity"

# Metrics
duration: 3min
completed: 2026-01-25
---

# Phase 1 Plan 4: HTTPS and Backup Summary

**Caddy reverse proxy with self-signed TLS for development, PostgreSQL daily backups with 30-day retention and weekly restore testing**

## Performance

- **Duration:** 3 min
- **Started:** 2026-01-25T20:17:00Z
- **Completed:** 2026-01-25T20:20:00Z
- **Tasks:** 2
- **Files modified:** 5

## Accomplishments

- Caddy reverse proxy with HTTPS termination and automatic HTTP redirect
- Security headers configured (HSTS, X-Content-Type-Options, X-Frame-Options)
- PostgreSQL backup script with integrity verification
- 30-day backup retention with automatic cleanup
- Weekly restore test to validate backup usability

## Task Commits

Each task was committed atomically:

1. **Task 1: Configure Caddy reverse proxy with HTTPS** - `3c09e27` (feat)
2. **Task 2: Create PostgreSQL backup script with retention** - `09f8961` (feat)

## Files Created/Modified

- `Caddyfile` - Caddy configuration with TLS, reverse proxy, and security headers
- `docker-compose.yml` - Added Caddy service with host networking
- `scripts/backup-postgres.sh` - Daily backup script with verification and retention
- `scripts/cron/postgres-backup` - Cron configuration for 2 AM daily backups
- `.gitignore` - Excludes pycache, env files, backup files

## Decisions Made

- **Self-signed TLS for development:** Used `tls internal` for local development; production will replace `:443` with actual domain and remove this directive
- **Host network mode:** Caddy uses `network_mode: host` to reach FastAPI on localhost:8000
- **Backup at 2 AM:** Low-traffic time for backup operations
- **30-day retention:** Balanced between storage efficiency and recovery options
- **Weekly restore test on Mondays:** Validates backups are actually restorable, not just created

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Fixed pg_restore verification to run in container**
- **Found during:** Task 2 (Backup script creation)
- **Issue:** Plan used host pg_restore for verification, but pg_restore only exists in container
- **Fix:** Changed verification to pipe backup into container via `docker exec -i`
- **Files modified:** scripts/backup-postgres.sh
- **Verification:** Backup script completes successfully with verification
- **Committed in:** 09f8961 (Task 2 commit)

---

**Total deviations:** 1 auto-fixed (1 blocking)
**Impact on plan:** Essential fix for backup verification to work. No scope creep.

## Issues Encountered

- Backend not running during HTTPS verification - expected behavior, Caddy correctly configured to proxy when backend is available

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- HTTPS termination ready for production (replace domain and remove `tls internal`)
- Backup script ready for cron installation (copy to /etc/cron.d/)
- Caddy admin API exposed on localhost:2019 for future dynamic route management

---
*Phase: 01-core-infrastructure-security*
*Completed: 2026-01-25*