docs: add Docker Compose setup for OAuth multi-user mode

- Update Dockerfile to default to streamable-http transport
- Add docker-compose.oauth-standalone.yml for existing OIDC providers
- Add .env.oauth.example template with all required settings
- Update README_DOCKER.md with OAuth deployment instructions

OAuth mode requires streamable-http transport (not stdio) since
authentication happens via browser redirect flow.

.env.oauth.example

@@ -0,0 +1,82 @@
+# mcvsphere OAuth Configuration Template
+# Copy to .env and configure for your environment
+#
+# Usage:
+#   cp .env.oauth.example .env
+#   # Edit .env with your values
+#   docker compose -f docker-compose.oauth-standalone.yml up -d
+
+# ─────────────────────────────────────────────────────────────────────────────
+# Docker Compose
+# ─────────────────────────────────────────────────────────────────────────────
+COMPOSE_PROJECT_NAME=mcvsphere
+
+# ─────────────────────────────────────────────────────────────────────────────
+# vCenter Connection (Required)
+# ─────────────────────────────────────────────────────────────────────────────
+VCENTER_HOST=vcenter.example.com
+VCENTER_USER=mcpservice@vsphere.local
+VCENTER_PASSWORD=your-secure-password
+
+# Optional: Skip SSL verification (dev only - use false in production)
+VCENTER_INSECURE=false
+
+# Optional: Specify defaults (auto-detected if not set)
+# VCENTER_DATACENTER=Datacenter
+# VCENTER_CLUSTER=Cluster
+# VCENTER_DATASTORE=datastore1
+# VCENTER_NETWORK=VM Network
+
+# ─────────────────────────────────────────────────────────────────────────────
+# MCP Transport (Required for OAuth)
+# ─────────────────────────────────────────────────────────────────────────────
+MCP_TRANSPORT=streamable-http
+MCP_HOST=0.0.0.0
+MCP_PORT=8080
+
+# Your public domain (must match Caddy proxy)
+MCP_DOMAIN=mcp.example.com
+
+# TLS mode: 'internal' for self-signed (dev), remove for auto HTTPS (prod)
+MCP_TLS_MODE=internal
+
+# ─────────────────────────────────────────────────────────────────────────────
+# OAuth / OIDC Provider (Required)
+# ─────────────────────────────────────────────────────────────────────────────
+OAUTH_ENABLED=true
+
+# OIDC Discovery URL (ends with /.well-known/openid-configuration)
+# Examples:
+#   Authentik: https://auth.example.com/application/o/mcvsphere/
+#   Keycloak:  https://keycloak.example.com/realms/myrealm
+#   Auth0:     https://myapp.auth0.com/
+#   Okta:      https://myorg.okta.com/oauth2/default
+OAUTH_ISSUER_URL=https://auth.example.com/application/o/mcvsphere/
+
+# OAuth Client Credentials (from your OIDC provider)
+OAUTH_CLIENT_ID=your-client-id
+OAUTH_CLIENT_SECRET=your-client-secret
+
+# Public callback URL (must be accessible from browser)
+OAUTH_BASE_URL=https://mcp.example.com
+
+# ─────────────────────────────────────────────────────────────────────────────
+# RBAC Permission Groups
+# ─────────────────────────────────────────────────────────────────────────────
+# Create these groups in your OIDC provider and assign users:
+#
+# | Group                  | Access Level                    |
+# |------------------------|---------------------------------|
+# | vsphere-super-admins   | Full control (all 94 tools)     |
+# | vsphere-host-admins    | Host operations + VM management |
+# | vsphere-admins         | VM lifecycle management         |
+# | vsphere-operators      | Power ops + snapshots           |
+# | vsphere-readers        | Read-only                       |
+#
+# Users without any vsphere-* group will be denied access (default-deny).
+
+# ─────────────────────────────────────────────────────────────────────────────
+# Optional Settings
+# ─────────────────────────────────────────────────────────────────────────────
+# LOG_LEVEL=INFO
+# MCVSPHERE_VERSION=0.2.2

Dockerfile

@@ -48,8 +48,11 @@ ENV PATH="/app/.venv/bin:$PATH"
 ENV PYTHONUNBUFFERED=1
 ENV PYTHONDONTWRITEBYTECODE=1
 
-# Default to SSE transport for Docker
-ENV MCP_TRANSPORT=sse
+# Default transport - override with MCP_TRANSPORT env var
+# stdio: Direct CLI usage (default for local)
+# sse: Server-Sent Events (legacy HTTP)
+# streamable-http: HTTP with OAuth support (required for multi-user)
+ENV MCP_TRANSPORT=streamable-http
 ENV MCP_HOST=0.0.0.0
 ENV MCP_PORT=8080
 
@@ -58,10 +61,9 @@ USER mcpuser
 
 EXPOSE 8080
 
-# Health check
+# Health check - works with both SSE and streamable-http
 HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
-    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8080')" || exit 1
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8080/.well-known/oauth-authorization-server')" || exit 1
 
-# Run the MCP server
+# Run the MCP server - transport configured via environment
 ENTRYPOINT ["mcvsphere"]
-CMD ["--transport", "sse"]

README_DOCKER.md

@@ -235,15 +235,89 @@ MCP_LOG_LEVEL=DEBUG
 log_level: "DEBUG"
 ```
 
+## OAuth Multi-User Mode
+
+For shared infrastructure or production deployments, mcvsphere supports OAuth 2.1 with any OIDC provider. This enables:
+
+- **Browser-based authentication** via Authentik, Keycloak, Auth0, Okta, etc.
+- **Group-based RBAC** with 5 permission levels
+- **Audit logging** with user identity
+
+### Quick Start (Existing OIDC Provider)
+
+If you already have an OIDC provider:
+
+```bash
+# 1. Copy and configure environment
+cp .env.oauth.example .env
+# Edit .env with your OIDC provider details
+
+# 2. Start mcvsphere with OAuth
+docker compose -f docker-compose.oauth-standalone.yml up -d
+
+# 3. Add to Claude Code
+claude mcp add -t http vsphere https://mcp.example.com/mcp
+```
+
+### Quick Start (New Authentik Deployment)
+
+To deploy mcvsphere with a complete Authentik identity provider:
+
+```bash
+# 1. Generate secrets and configure
+./scripts/setup-oauth.sh
+
+# 2. Start full stack (mcvsphere + Authentik + PostgreSQL + Redis)
+docker compose -f docker-compose.oauth.yml up -d
+
+# 3. Configure Authentik at https://auth.yourdomain.com
+#    - Create OAuth2 provider
+#    - Create vsphere-* groups
+#    - Assign users to groups
+```
+
+### RBAC Permission Groups
+
+Create these groups in your OIDC provider:
+
+| Group | Access Level |
+|-------|--------------|
+| `vsphere-super-admins` | Full control (all 94 tools) |
+| `vsphere-host-admins` | Host operations + VM management |
+| `vsphere-admins` | VM lifecycle management |
+| `vsphere-operators` | Power ops + snapshots |
+| `vsphere-readers` | Read-only |
+
+Users without any `vsphere-*` group are denied access (default-deny security).
+
+### Required Environment Variables
+
+```bash
+# Transport (must be streamable-http for OAuth)
+MCP_TRANSPORT=streamable-http
+
+# OIDC Provider
+OAUTH_ENABLED=true
+OAUTH_ISSUER_URL=https://auth.example.com/application/o/mcvsphere/
+OAUTH_CLIENT_ID=your-client-id
+OAUTH_CLIENT_SECRET=your-client-secret
+OAUTH_BASE_URL=https://mcp.example.com
+```
+
+See [OAUTH-ARCHITECTURE.md](OAUTH-ARCHITECTURE.md) for detailed setup and troubleshooting.
+
+---
+
 ## Production Deployment
 
 ### Security Recommendations
 
-1. Use a dedicated user account for vCenter access
-2. Enable API key authentication
-3. Use valid SSL certificates (set `insecure: false`)
+1. Use a dedicated service account for vCenter access
+2. Enable OAuth authentication (not API keys)
+3. Use valid SSL certificates (set `VCENTER_INSECURE=false`)
 4. Limit container resources
 5. Use Docker secrets for sensitive data
+6. Deploy behind a reverse proxy with HTTPS (Caddy recommended)
 
 ### High Availability
 

docker-compose.oauth-standalone.yml

@@ -0,0 +1,64 @@
+# mcvsphere with OAuth - Standalone Mode
+# For users who already have an OIDC provider (Authentik, Keycloak, Auth0, Okta, etc.)
+#
+# Usage:
+#   1. Copy .env.oauth.example to .env
+#   2. Configure your OIDC provider settings
+#   3. docker compose -f docker-compose.oauth-standalone.yml up -d
+#
+# Requires:
+#   - External OIDC provider with OAuth 2.1 support
+#   - Caddy network (caddy-docker-proxy) for HTTPS termination
+#
+# For full Authentik deployment, use docker-compose.oauth.yml instead
+
+services:
+  mcvsphere:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: mcvsphere:${MCVSPHERE_VERSION:-latest}
+    container_name: mcvsphere
+    restart: unless-stopped
+    env_file:
+      - .env
+    environment:
+      # Transport - streamable-http required for OAuth
+      MCP_TRANSPORT: streamable-http
+      MCP_HOST: 0.0.0.0
+      MCP_PORT: 8080
+      # OAuth - set in .env file
+      OAUTH_ENABLED: ${OAUTH_ENABLED:-true}
+    volumes:
+      - ./logs:/app/logs
+    networks:
+      - caddy
+    healthcheck:
+      test: ["CMD", "python", "-c", "import urllib.request; urllib.request.urlopen('http://127.0.0.1:8080/.well-known/oauth-authorization-server')"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 15s
+    labels:
+      # Caddy reverse proxy - configure domain in .env
+      caddy: ${MCP_DOMAIN:-mcp.localhost}
+      caddy.reverse_proxy: "{{upstreams 8080}}"
+      # TLS - use 'internal' for local dev, remove for production (auto HTTPS)
+      caddy.tls: ${MCP_TLS_MODE:-internal}
+      # WebSocket/streaming support
+      caddy.reverse_proxy.flush_interval: "-1"
+      caddy.reverse_proxy.transport: http
+      caddy.reverse_proxy.transport.read_timeout: "0"
+      caddy.reverse_proxy.transport.write_timeout: "0"
+    deploy:
+      resources:
+        limits:
+          memory: 512M
+          cpus: '1.0'
+        reservations:
+          memory: 256M
+          cpus: '0.25'
+
+networks:
+  caddy:
+    external: true