Session 0022: Post-Coolify Architecture Context for Ops Toolkit

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

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

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