forwardAuth-Modus: static://202 + REVERSE_PROXY
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@@ -1,3 +1,60 @@
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# infra-auth-proxy
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OAuth2-Proxy als Traefik Forward-Auth-Backend für Keycloak-Login
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OAuth2-Proxy als Reverse-Proxy-Authentifizierung für Traefik.
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Bietet zentrale Keycloak-Login-Weiterleitung für alle Homelab-Apps.
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## Architektur
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```
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Browser → Traefik → oauth2-proxy → App
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↕ Keycloak (Login, Session)
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```
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oauth2-proxy läuft im **Reverse-Proxy-Modus**:
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- Unauthentifizierter Request → 302-Redirect zu Keycloak-Login
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- Authentifzierter Request → Weiterleitung an das Upstream
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## Neue Services schützen
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1. **Upstream registrieren** in `.env`:
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```
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OAUTH2_PROXY_UPSTREAMS=http://service1:3000,http://service2:8080
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```
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(Container-Namen müssen auf `infra-traefik_traefik-net` erreichbar sein)
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2. **Traefik-Router** in der eigenen App:
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```yaml
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labels:
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- "traefik.http.services.app.loadbalancer.server.url=http://oauth2-proxy:4180"
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```
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(statt `loadbalancer.server.port=XXXX` direkt auf die App)
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3. `docker compose up -d` in beiden Stacks
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## Setup
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```bash
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# .env aus Template erstellen
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cp .env.template .env
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# OAUTH2_PROXY_CLIENT_SECRET: Keycloak Client `auth-proxy` Secret
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# OAUTH2_PROXY_COOKIE_SECRET: openssl rand -hex 16
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# Deploy
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docker compose up -d
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```
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## Alternative: Forward-Auth für API-Endpoints
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Für API-Endpoints (wo 401 statt Redirect sinnvoll ist) steht die
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`keycloak-oauth2` forwardAuth-Middleware in `infra-traefik/dynamic.yaml` bereit:
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```yaml
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labels:
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- "traefik.http.routers.api.middlewares=keycloak-oauth2@file"
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```
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## Keycloak-Client
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- **Realm:** `family`
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- **Client-ID:** `auth-proxy`
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- **Redirect URI:** `https://auth-proxy.ljh31.de/oauth2/callback`
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