# Session 0022: Post-Coolify Architecture Context for Ops Toolkit

**Date:** 2026-02-23
**Status:** Completed
**Origin:** MDF Webseiten session 0044 (Coolify Removal Complete)

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## Work Done

- [x] Coolify fully removed from server (6 containers, 18 UUID networks, /data/coolify/ directory)
- [x] Standalone Traefik v3.6 confirmed as proxy layer (was coolify-proxy, now independent at /opt/data/traefik/)
- [x] All 28 containers verified operational post-removal; 17/17 domains tested
- [x] Dynamic configs migrated: seriousletter.yaml, ringsaday.yaml moved to /opt/data/traefik/dynamic/
- [x] SSL certificates preserved: acme.json migrated to /opt/data/traefik/acme.json
- [x] Coolify archive retained: /opt/data/backups/coolify-final-20260223.tar.gz (125KB, 30-day window)

## Key Decisions / Learnings

- **Ops toolkit no longer depends on Coolify API** — all lifecycle management (start/stop/rebuild/recreate) must use Docker CLI and docker compose directly against project compose files at `/opt/data/{project}/`
- **Container naming is now clean** — no more UUID suffixes. Pattern: `{env}-{project}-{service}` (e.g. `prod-mdf-wordpress`, `dev-seriousletter-backend`)
- **Proxy network is `proxy`** (replaces old `coolify` network) — all Traefik-exposed containers connect to it
- **Project descriptors at `/opt/data/{project}/project.yaml`** are the new source of truth for container config — registry.yaml is deprecated (used only by gen-timers and schedule PUT)
- **Docker provider + file provider** coexist in Traefik: MDF services use Docker labels; SeriousLetter, RingsADay, KioskPilot use file provider configs
- metro.ringsaday.com returns 502 — pre-existing issue unrelated to Coolify removal (no metro service in compose)
- Docker system cleanup freed ~9GB of unused images and volumes during removal

## Architecture Reference (Post-Coolify)

```
Proxy:           Traefik v3.6 at /opt/data/traefik/
Config:          traefik.yaml (static), dynamic/ (file provider)
Certs:           /opt/data/traefik/acme.json
Proxy network:   proxy

Projects:
  MDF prod:      /opt/data/mdf/prod/  — WordPress, MySQL, Mail, PostfixAdmin, Roundcube, Seafile
  MDF int/dev:   /opt/data/mdf/{int,dev}/  — WordPress + MySQL
  SeriousLetter: /opt/data/seriousletter/{dev,int,prod}/
  RingsADay:     /opt/data/ringsaday/
  KioskPilot:    /opt/data/kioskpilot/
  Ops Dashboard: /opt/data/ops-dashboard/
```

## Files Changed

- Server: `/data/coolify/` — deleted (backed up first)
- Server: `/opt/data/traefik/dynamic/` — received migrated seriousletter.yaml and ringsaday.yaml

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**Tags:** #Session #OpsToolkit #Architecture #Traefik #PostCoolify