linearvoid/docs/DEPLOYMENT.md

Deployment Guide

Environments

Environment	Host	Docker Target	Purpose
Test Lab	192.168.88.40 (internal)	tcp://192.168.88.40:2375	Integration testing, staging, CI/CD validation
Production	Hetzner VPS (TBD)	tcp://<hetzner-ip>:2375	Public linearvoid.tv

Current state (2026-08-06): Test lab is active and receives automated CD deploys. Production Hetzner VPS is not yet provisioned. cd.yml and docker-compose.prod.yml target the test lab; switching to production only requires changing DOCKER_HOST.

Production Target (Hetzner)

Status: Not provisioned. Plan documented and pipeline ready; only the VPS needs creation.

Planned Infrastructure

• Provider: Hetzner Cloud, Region: Ashburn, VA (us-east)
• Instance: CX22 (2 vCPU, 4 GB RAM, 40 GB SSD) or equivalent
• OS: Ubuntu 24.04 LTS or Debian 12
• Bandwidth: 20 TB included traffic/month; Estimated cost: ~€7–10/month base

Cutover Plan

1. Provision Hetzner VPS
2. Add production secrets to Gitea (CI_PROD_* prefix)
3. Update DOCKER_HOST in CD workflow to Hetzner public IP
4. Trigger deploy → validate health checks
5. Update Cloudflare A record linearvoid.tv → Hetzner IP
6. Enable HTTPS, WAF, cache rules on production zone
7. Decommission test lab as public target

Production Preflight (minimum readiness gate)

1. Verify Hetzner host reachable over SSH and Docker remote API TLS works for the Gitea runner
2. Confirm all production secrets exist under CI_PROD_* prefix
3. Confirm linearvoid.tv, www.linearvoid.tv, media.linearvoid.tv DNS targets match intended phase
4. Complete manual Cloudflare/UptimeRobot checklist (see docs/operations/cloudflare-uptimerobot-checklist.md)
5. Run production smoke path end-to-end: viewer SPA, HLS playback, chat connect, admin login, upload, playlist save, playout health
6. Verify rollback possible before final DNS switch

Firewall / Security Group

Port	Source	Purpose
22	Admin IPs	SSH management
80	0.0.0.0/0	HTTP (redirect to HTTPS)
443	0.0.0.0/0	HTTPS (nginx)
2375	Gitea runner IP only	Docker remote API (TLS)
9090	Admin IPs or internal	Prometheus (or tunnel via SSH)
3001	Admin IPs or internal	Grafana (or tunnel via SSH)

Pipeline Readiness

Workflow	Trigger	Purpose
ci.yml	Push to main	Lint, build frontend, vet Go, build & push images (:latest, :main)
cd.yml	Push to main	Deploy to test lab (192.168.88.40:2375) — runs in parallel with CI
release.yml	Tag push *.*.*	Build & push versioned images (:X.Y.Z, :X.Y, :latest), create Gitea Release
workers-deploy.yml	After CI succeeds	Deploy frontend to Cloudflare Workers

CI and CD run simultaneously on every push to main. Deploy pulls whatever :latest images are available at that moment. cd.yml uses DOCKER_HOST to target the host:

# Test lab (current)
DOCKER_HOST=tcp://192.168.88.40:2375

# Production (when provisioned)
DOCKER_HOST=tcp://<hetzner-public-ip>:2375

No pipeline code changes needed to switch targets.

Target Topology

• Host: Linux server with Docker Engine
• Reverse proxy: nginx container (linearvoid-nginx)
• Core services: playout, chat, redis, postgres
• Observability: prometheus, grafana
• CDN/edge: Cloudflare

Prerequisites

• Docker Engine + Docker Compose plugin
• Network access to git.allucanget.biz
• Valid .env file with production values
• DNS configured for linearvoid.tv (and media.linearvoid.tv if split media domain used)

Environment File

.env requires at minimum:

• DATABASE_URL — PostgreSQL connection string
• REDIS_URL — Redis connection string
• ADMIN_USERNAME / ADMIN_PASSWORD — admin dashboard credentials
• ADMIN_SESSION_TTL_HOURS — session expiry (default 12)
• VITE_PUBLIC_APP_URL / VITE_PUBLIC_WS_URL / VITE_PUBLIC_HLS_URL — frontend URLs

Cloudflare R2 (required for HLS segment sync to edge):

• R2_ACCESS_KEY_ID / R2_SECRET_ACCESS_KEY
• R2_BUCKET_NAME (e.g. linearvoid-media)
• R2_ENDPOINT — S3-compatible endpoint URL
• R2_REGION — set to auto

Cloudflare (optional, for Workers):

• CLOUDFLARE_API_TOKEN / CLOUDFLARE_ACCOUNT_ID
• MEDIA_DOMAIN — split media domain (e.g. media.linearvoid.tv)

See .env.example and SETUP.md for full variable reference.

Gitea Secrets

cd.yml injects sensitive values from Gitea secrets into .env at deploy time. Configure in the Gitea repository:

DATABASE_URL, ADMIN_USERNAME, ADMIN_PASSWORD, R2_ACCESS_KEY_ID, R2_SECRET_ACCESS_KEY, R2_BUCKET_NAME, R2_ENDPOINT, R2_ADMIN_ACCESS_KEY_ID (optional), R2_ADMIN_SECRET_ACCESS_KEY (optional), R2_ADMIN_ENDPOINT (optional), CLOUDFLARE_API_TOKEN (optional), CLOUDFLARE_ACCOUNT_ID (optional), CI_REGISTRY_USER, CI_REGISTRY_TOKEN

Pull-and-Run Deployment

Images are built/pushed automatically by CI and release workflows. Every push to main triggers CI (:main, :latest) and CD (deploys :latest to test lab) in parallel. Semantic version tags (*.*.*, e.g. 1.0.9) trigger the release workflow (:X.Y.Z, :X.Y, :latest + Gitea Release).

docker login git.allucanget.biz
docker compose -f docker-compose.prod.yml pull
docker compose -f docker-compose.prod.yml up -d --remove-orphans

First-Time or Recovery Provisioning

mkdir -p data/chat data/playlist data/media data/hls
docker volume ls
docker network ls
docker compose -f docker-compose.prod.yml up -d

Health Verification

docker compose -f docker-compose.prod.yml ps

Endpoint checks:

• App: http://{host}:8080/
• Nginx health: http://{host}:8080/health
• Chat health: http://{host}:3000/health
• Playout health: http://{host}:8081/health
• Prometheus: http://{host}:9090
• Grafana: http://{host}:3001

Domain checks:

• https://linearvoid.tv
• https://linearvoid.tv/admin
• https://linearvoid.tv/metrics

Zero/Low-Downtime Update Pattern

1. Pull newest images.
2. Recreate changed services only:

docker compose -f docker-compose.prod.yml pull
docker compose -f docker-compose.prod.yml up -d nginx chat playout

3. Re-run health checks.

Rollback

If new images are unhealthy:

1. Pin previous tags in docker-compose.prod.yml.
2. Pull pinned tags.
3. Restart impacted services:

docker compose -f docker-compose.prod.yml pull
docker compose -f docker-compose.prod.yml up -d nginx chat playout

Operational Tasks

# View logs
docker compose -f docker-compose.prod.yml logs -f nginx chat playout

# Restart one service
docker compose -f docker-compose.prod.yml restart chat

# Stop stack (keep data)
docker compose -f docker-compose.prod.yml down

# Stop stack — destructive (remove data)
docker compose -f docker-compose.prod.yml down -v

Nginx and Proxy Considerations

• If an external proxy (e.g. Nginx Proxy Manager) fronts the stack, align request body limits with internal nginx (see infrastructure/nginx/nginx.conf).
• For resumable admin uploads, ensure client_max_body_size supports chunk requests in both proxy layers.

Security Baseline

• Use a strong ADMIN_PASSWORD and rotate regularly.
• Keep Docker host access restricted.
• Prefer HTTPS/WSS through Cloudflare.
• Restrict exposed ports if only proxy access is needed.

Common Deployment Pitfalls

• Missing frontend build artifacts in local-only compose workflows.
• Wrong registry credentials or missing login.
• Misaligned domain env vars (app/ws/hls) causing mixed-origin errors.

Troubleshooting

Symptom	Check	Fix
Service not starting	docker logs linearvoid-<svc> --tail 50	Check .env vars, volume mounts, port conflicts
Playout stall / slate mode	curl http://<host>:8081/health — mode=slate	Check playlist file, media paths, disk space
Chat not connecting	curl http://<host>:3000/health	Check Redis: docker exec linearvoid-redis redis-cli ping
Admin 401 loop	Cookie not sent	Verify X-Forwarded-Proto: https, nginx auth_request headers
Upload fails (413)	File too large	Check nginx client_max_body_size (should be 64m+)
HLS not playing	curl http://<host>/hls/playlist.m3u8	Check playout health, HLS dir permissions
Prometheus no targets	curl http://<host>:9090/targets	Verify container network, scrape config
Grafana no data	Check datasource	Verify Prometheus URL http://prometheus:9090 provisioned

Additional notes: proxy-layer body size limits can return 413 on upload; health checks may fail before service warmup completes.