# 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

## 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"
- No prefix (e.g. `POSTGRES_PASSWORD`, `PUBLIC_HOST`) — shared infrastructure, consumed by multiple components