Server configuration (.env)

A single .env file at the repo root configures the entire stack: docker-compose.yml interpolates ${VAR} into the redis, livekit, ingress, egress and caddy services, and passes the whole file to the core container via env_file: .env. The template with inline comments lives at .env.example.

Automatic (installer)

install.sh writes .env for you with strong random secrets and sane values derived from the domain you give it. You normally never hand-edit it on a fresh install:

curl -fsSL https://www.streamhub.studio/install.sh | sudo bash -s -- \
  --non-interactive --domain media.example.com --email you@example.com

Re-running the installer is safe (--dry-run prints the plan without changing anything). See Quick install.

Manual

cp .env.example .env
# edit .env: at minimum STREAMHUB_DOMAIN, LIVEKIT_API_KEY/SECRET,
# STREAMHUB_JWT_SECRET, ADMIN_USER/PASS, STREAMHUB_API_TOKEN
docker compose up -d --build

Secrets are generated once, never rotated automatically

install.sh distinguishes operator-provided values (domain, admin user, SMTP settings — updated on every re-run if you pass new flags) from generated secrets (LiveKit keys, STREAMHUB_JWT_SECRET, STREAMHUB_API_TOKEN, STREAMHUB_CLUSTER_TOKEN, METRICS_TOKEN, a random ADMIN_PASS if you didn’t supply one). Generated secrets are written once and kept forever across re-runs. To rotate one, edit .env by hand and restart the affected services.

Core / HTTP

Variable	Default	Description
HOST	127.0.0.1	Local bind address of the core NestJS process. The reverse proxy targets this — never bind it to a public interface.
PORT	3020	Core HTTP port.
NODE_ENV	development (code default) — install.sh/.env.example set production	Node environment; gates isProduction behavior.
LOG_LEVEL	info	pino log level: fatal

Public URLs & domain

Variable	Default	Description
STREAMHUB_DOMAIN	streamhub.example.com	The single public domain Caddy/nginx fronts (dashboard + API + LiveKit /rtc). Needs a DNS-only A record — do not proxy it through a CDN, WebRTC media is UDP and won’t traverse an HTTP proxy. Use localhost for a local self-signed test. Read by Caddy/nginx/install.sh, not by the core process itself.
ACME_EMAIL	admin@example.com	Let’s Encrypt / ACME registration email (real domains only).
PUBLIC_WS_URL	(empty)	The ws/wss URL handed to browser clients in join links and tokens. Real domain: wss://<domain> (rides the single TLS vhost via /rtc). Localhost: ws://127.0.0.1:7880.
RTMP_PUBLIC_HOST	(empty)	Public host advertised in RTMP publish URLs handed to clients.
PUBLIC_BASE_URL	(empty)	Absolute base URL used to build HLS/player/embed/sample links (and the yolo plugin’s public base). Empty = derive from the incoming request host. Takes precedence over STREAMHUB_PUBLIC_URL wherever both are checked.
STREAMHUB_PUBLIC_URL	(empty)	Fallback base URL (samples, the cluster join-command hint) used when PUBLIC_BASE_URL is unset. install.sh sets this to https://<domain>.
STREAMHUB_APP_URL	https://app.streamhub.studio	Public base URL of the dashboard SPA, used to build magic-link, invite and password-reset URLs in outgoing email.

LiveKit

Shared by the core, ingress and egress services.

Variable	Default	Description
LIVEKIT_URL	ws://127.0.0.1:7880	How core reaches LiveKit’s control plane locally.
LIVEKIT_API_KEY	(none — required)	LiveKit API key. Generate with livekit-server generate-keys, or let install.sh generate one.
LIVEKIT_API_SECRET	(none — required)	LiveKit API secret.
LIVEKIT_REDIS_ADDRESS	(unset)	Edge nodes only (written by install.sh --join): host:port of the origin’s coordination Redis.
LIVEKIT_REDIS_PASSWORD	(unset)	Edge nodes only: password for the origin’s Redis.
LIVEKIT_WEBHOOK_URL	http://127.0.0.1:3020/api/v1/webhooks/livekit	Where LiveKit posts room webhooks. Edge nodes point this at the origin’s core — edges run no core of their own.

Redis

Variable	Default	Description
REDIS_URL	redis://127.0.0.1:6379	Redis used by LiveKit ingress/egress coordination and BullMQ job queues.
REDIS_BIND	127.0.0.1	Space-separated list of IPs the redis container binds to. Add a private IP here to serve edge nodes (paired with a password).
REDIS_PASSWORD	(empty = auth disabled)	Password for the local Redis container (--requirepass).
STREAMHUB_CLUSTER_REDIS_URL	(unset)	Redis URL handed back to a joining edge node in the /cluster/join response, so it attaches to the same LiveKit coordination Redis. Unset → returned as null (the edge keeps its local default).

Auth & RBAC

Variable	Default	Description
STREAMHUB_JWT_SECRET	(none — required)	Signs the dashboard login JWT (POST /api/v1/auth/login).
ADMIN_USER	(empty)	Break-glass dashboard admin username. Login is disabled if either ADMIN_USER or ADMIN_PASS is empty.
ADMIN_PASS	(empty)	Break-glass dashboard admin password.
STREAMHUB_API_TOKEN	sk_change_me	Global API bearer token, seeded into the DB by deploy/seed-token.js (the DB keeps only a hash). Kept in .env only so re-running the installer stays idempotent.
STREAMHUB_AUTHZ_ENFORCE	on	RBAC + quota + per-app-token isolation mode: off
STREAMHUB_ALLOW_SIGNUP	(unset = off)	Public self-signup (POST /auth/signup + “Create account” in the dashboard). 1/true/on/yes = anyone can sign up and get their own free-plan tenant. Unset = invite-only: a brand-new email gets 403; an invited pending user can still complete signup.
STREAMHUB_SUPERADMIN_EMAIL	info@streamhub.studio	Email that becomes the superadmin principal the moment it signs in via magic-link.
AUTH_RATE_LIMIT_MAX	10	Max attempts per client IP per window on the sensitive auth routes only (login, magic-link, magic/verify, reset-request, reset). The rest of the API, including dashboard polling, is not limited.
AUTH_RATE_LIMIT_WINDOW_MS	900000 (15 min)	Rate-limit window for the routes above.

SMTP / email

Magic-link login, invites and password resets. Without STREAMHUB_SMTP_HOST and STREAMHUB_SMTP_PASS set, sends are skipped — logged, never crash the request.

Variable	Default	Description
STREAMHUB_SMTP_HOST	mail.wipermax.online	SMTP server. The built-in default is the vendor’s own mail host — set your own in production.
STREAMHUB_SMTP_PORT	587	587 → STARTTLS; 465 → implicit TLS.
STREAMHUB_SMTP_USER	no-reply@streamhub.studio	SMTP auth user.
STREAMHUB_SMTP_PASS	(unset — required to actually send mail)	SMTP password. Secret, never logged.
STREAMHUB_SMTP_FROM	StreamHub <no-reply@streamhub.studio>	From: header on outgoing mail.

Cluster (multi-node)

Used when a box joins an existing control plane via POST /api/v1/cluster/join (install.sh --join). On a single-node install, leave this unset.

Variable	Default	Description
STREAMHUB_CLUSTER_TOKEN	(unset = joining disabled)	Shared secret an edge node must send as X-Cluster-Token to POST /cluster/join and /cluster/heartbeat. The /cluster/join endpoint returns 503 while this is unset. Must be long and random in production.

See also STREAMHUB_CLUSTER_REDIS_URL (Redis section above) and LIVEKIT_REDIS_ADDRESS / LIVEKIT_REDIS_PASSWORD / LIVEKIT_WEBHOOK_URL (LiveKit section above), which are the values an edge node actually receives from a successful join.

Storage / data

Variable	Default	Description
DATA_DIR	/data (inside the containers)	Where core (and egress) read/write data/streamhub.db, apps/<name>/{recordings,hls,snapshots,samples}, logs/, sdk/. Must be identical for core and egress — egress writes MP4s exactly where core looks to upload them to S3.
STREAMHUB_HOST_DATA_DIR	./data	Host path bind-mounted to DATA_DIR in both the core and egress containers (Compose only).
SDK_DIR	<DATA_DIR>/sdk	Where core serves the /sdk/* browser SDK from.
STREAMHUB_SNAPSHOT_SOURCE	(auto)	Override for the on-demand snapshot capture source.

Note

Per-app S3 credentials are never env vars — they live in data/secrets.json (chmod 600), referenced from each app’s config.yaml via *_env keys. See Per-app config.yaml.

Metrics

Variable	Default	Description
METRICS_TOKEN	(unset = disabled)	Guards GET /metrics. Default-deny: unset → 404 (never leaks). Set it and /metrics requires a matching Authorization: Bearer <token> (or ?token=).
METRICS_DEFAULT_METRICS	on	Set to off to disable the default process_* / nodejs_* Prometheus collectors.

LiveKit, ingress and egress also expose their own native Prometheus metrics on fixed host ports (not env-tunable) — see Ports & firewall.

Logging

Variable	Default	Description
LOG_MAX_BYTES	10485760 (10 MB)	Rotating log file size cap.
LOG_MAX_FILES	10	Number of rotated log files kept (count cap).
LOG_RETENTION_DAYS	30	Retention window for operational logs: purges server_logs DB rows and rotated log files older than this. 0 disables age-based purging (the file count cap still applies). The purge runs ~1 minute after boot and every 6 hours.

Transcoding / GPU

Variable	Default	Description
TRANSCODING_HWACCEL	auto	Hardware-accel preference: auto (GPU when the node has one, else CPU)
GPU_DISABLE	(unset)	Set to true to force CPU-only and skip GPU detection entirely.

Resource limits (Docker Compose only)

These are not read by core — they are Compose mem_limit/cpus keys applied directly to the egress and ingress containers, the hard caps that stop a runaway session from taking down the host.

Variable	Default	Description
EGRESS_MEM_LIMIT	2g	RAM cap for the egress container. Egress drives a headless Chrome to composite rooms — it is the single biggest OOM risk on a small host.
EGRESS_CPUS	2	CPU cap for egress.
INGRESS_MEM_LIMIT	1g	RAM cap for the ingress container.
INGRESS_CPUS	1.5	CPU cap for ingress.

See Limitations & capacity for measured RAM cost per recording and why the default EGRESS_MEM_LIMIT matters.

Backups

Consumed by deploy/backup.sh (cron / systemd timer), not by core itself.

Variable	Default	Description
BACKUP_DATA_DIR	(unset)	Host data dir to back up (streamhub.db + apps/<app>/app.db + secrets.json).
BACKUP_LOCAL_DIR	<BACKUP_DATA_DIR>/backups	Where local tarballs are kept.
BACKUP_RETENTION_DAYS	30	Prune local + remote copies older than this many days.
BACKUP_S3_BUCKET	(empty = local-only)	S3 (or S3-compatible) target for off-box copies.
BACKUP_S3_ENDPOINT	(empty = AWS)	Custom endpoint, e.g. https://s3.wasabisys.com.
BACKUP_S3_PREFIX	streamhub-backups	Key prefix inside the bucket.
BACKUP_S3_REGION	us-east-1	Bucket region.
BACKUP_S3_ACCESS_KEY_ID / BACKUP_S3_SECRET_ACCESS_KEY	(unset)	Credentials for the backup target.

Minimal production .env

STREAMHUB_DOMAIN=streamhub.example.com
ACME_EMAIL=admin@example.com
LIVEKIT_API_KEY=API…            # generate-keys
LIVEKIT_API_SECRET=…            # long random
PUBLIC_WS_URL=wss://streamhub.example.com
RTMP_PUBLIC_HOST=streamhub.example.com
REDIS_URL=redis://127.0.0.1:6379
STREAMHUB_JWT_SECRET=…          # long random
ADMIN_USER=admin
ADMIN_PASS=…                    # strong
STREAMHUB_API_TOKEN=sk_…        # long random
STREAMHUB_AUTHZ_ENFORCE=on
DATA_DIR=/data
STREAMHUB_HOST_DATA_DIR=./data
LOG_LEVEL=info
NODE_ENV=production

Tip

STREAMHUB_AUTHZ_ENFORCE=on is the secure-by-default setting for a fresh install: RBAC is enforced, per-app sk_ tokens are confined to their own app, and over-quota requests are rejected. Use log only temporarily, while migrating a deployment that previously ran unenforced.