# Installer

## Deployment Modes

The installer (`installer/install.sh`) supports two deployment modes:

| | Multi-tenant SaaS (`DEPLOYMENT_MODE=saas`) | Standalone (`DEPLOYMENT_MODE=standalone`) |
|---|---|---|
| **Containers** | traefik, postgres, clickhouse, logto, cameleer-saas | traefik, postgres, clickhouse, server, server-ui |
| **Auth** | Logto OIDC (SaaS admin + tenant users) | Local auth (built-in admin, no identity provider) |
| **Tenant management** | SaaS admin creates/manages tenants via UI | Single server instance, no fleet management |
| **PostgreSQL** | `cameleer-postgres` image (multi-DB init) | Stock `postgres:16-alpine` (server creates schema via Flyway) |
| **Use case** | Platform vendor managing multiple customers | Single customer running the product directly |

Standalone mode generates a simpler compose with the server running directly. No Logto, no SaaS management plane, no bootstrap. The admin logs in with local credentials at `/`.

## Compose templates

The installer uses static docker-compose templates in `installer/templates/`. Templates are copied to the install directory and composed via `COMPOSE_FILE` in `.env`:
- `docker-compose.yml` — shared infrastructure (traefik, postgres, clickhouse)
- `docker-compose.saas.yml` — SaaS mode (logto, cameleer-saas)
- `docker-compose.server.yml` — standalone mode (server, server-ui)
- `docker-compose.tls.yml` — overlay: custom TLS cert volume
- `docker-compose.monitoring.yml` — overlay: external monitoring network

## SMTP configuration

Both installers (`install.sh` and `install.ps1`) prompt for SMTP settings in SaaS mode when the user opts in ("Configure SMTP for email verification?"). SMTP is required for self-service sign-up — without it, only admin-created users can sign in.

Env vars: `SMTP_HOST`, `SMTP_PORT` (default 587), `SMTP_USER`, `SMTP_PASS`, `SMTP_FROM_EMAIL` (default `noreply@<PUBLIC_HOST>`). Passed to the `cameleer-logto` container. The bootstrap script (Phase 8b) discovers the SMTP connector factory and creates the connector with Cameleer-branded email templates.

CLI args: `--smtp-host`, `--smtp-port`, `--smtp-user`, `--smtp-pass`, `--smtp-from-email` (bash) / `-SmtpHost`, `-SmtpPort`, `-SmtpUser`, `-SmtpPass`, `-SmtpFromEmail` (PS1). Persisted in `cameleer.conf` for upgrades/reconfigure.

## Registry configuration

Both installers support pulling images from a custom Docker registry via `--registry` (bash) / `-Registry` (PS1). Default: `gitea.siegeln.net/cameleer`.

When a registry is configured, the installer writes `*_IMAGE` env vars to `.env` (e.g. `TRAEFIK_IMAGE`, `POSTGRES_IMAGE`, `CAMELEER_IMAGE`) which override the defaults baked into the compose templates. In SaaS mode, provisioning image refs (`CAMELEER_SAAS_PROVISIONING_*IMAGE`) are also set from the registry.

For private registries, pass `--registry-user` / `--registry-token` (bash) or `-RegistryUser` / `-RegistryToken` (PS1). The installer runs `docker login` before pulling images. Credentials are persisted in `cameleer.conf` for upgrades/reconfigure.

## Env var naming convention

- `CAMELEER_AGENT_*` — agent config (consumed by the Java agent)
- `CAMELEER_SERVER_*` — server config (consumed by cameleer-server)
- `CAMELEER_SAAS_*` — SaaS management plane config
- `CAMELEER_SAAS_PROVISIONING_*` — "SaaS forwards this to provisioned tenant servers"
- `SMTP_*` — email delivery config for Logto (consumed by bootstrap, SaaS mode only)
- No prefix (e.g. `POSTGRES_PASSWORD`, `PUBLIC_HOST`) — shared infrastructure, consumed by multiple components