Update index.yaml

Signed-off-by: cbcoutinho <cbcoutinho@users.noreply.github.com>

charts/nextcloud-mcp-server/README.md

@@ -14,8 +14,12 @@ This Helm chart deploys the Nextcloud MCP (Model Context Protocol) Server on a K
 ### Quick Start with Basic Authentication
 
 ```bash
+# Add the Helm repository
+helm repo add nextcloud-mcp https://cbcoutinho.github.io/nextcloud-mcp-server
+helm repo update
+
 # Install with basic auth (recommended for most users)
-helm install nextcloud-mcp ./helm/nextcloud-mcp-server \
+helm install nextcloud-mcp nextcloud-mcp/nextcloud-mcp-server \
   --set nextcloud.host=https://cloud.example.com \
   --set auth.basic.username=myuser \
   --set auth.basic.password=mypassword
@@ -47,7 +51,7 @@ resources:
 Install with your custom values:
 
 ```bash
-helm install nextcloud-mcp ./helm/nextcloud-mcp-server -f custom-values.yaml
+helm install nextcloud-mcp nextcloud-mcp/nextcloud-mcp-server -f custom-values.yaml
 ```
 
 ### OAuth Authentication Mode (Experimental)
@@ -95,11 +99,11 @@ ingress:
 |-----------|-------------|---------|
 | `nextcloud.host` | URL of your Nextcloud instance (required) | `""` |
 | `nextcloud.mcpServerUrl` | MCP server URL for OAuth callbacks (OAuth only, optional) | Smart default* |
-| `nextcloud.publicIssuerUrl` | Public issuer URL for OAuth (OAuth only, optional) | Smart default** |
+| `nextcloud.publicIssuerUrl` | Public URL for browser-accessible OAuth authorization endpoint (OAuth only, optional) | Smart default** |
 
 **Smart Defaults:**
 - `*mcpServerUrl`: If not set, automatically uses ingress host (if enabled) or `http://localhost:8000` (for port-forward setups)
-- `**publicIssuerUrl`: If not set, automatically defaults to `nextcloud.host` (which works when both clients and MCP server access Nextcloud at the same URL)
+- `**publicIssuerUrl`: If not set, defaults to `nextcloud.host`. **Only used for authorization endpoints** that browsers must access. All server-to-server endpoints (token, JWKS, introspection, userinfo) use URLs from OIDC discovery without rewriting
 
 #### Authentication
 
@@ -114,14 +118,54 @@ ingress:
 | `auth.oauth.persistence.enabled` | Enable persistent storage for OAuth | `true` |
 | `auth.oauth.persistence.size` | Size of OAuth storage PVC | `100Mi` |
 
+#### Data Storage
+
+The `/app/data` directory is used for application data (token databases, Qdrant persistent storage, etc.). It is always mounted as writable to support the read-only root filesystem security context.
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `dataStorage.enabled` | Enable persistent storage for `/app/data` | `false` |
+| `dataStorage.size` | Size of data storage PVC | `1Gi` |
+| `dataStorage.storageClass` | Storage class (leave empty for default) | `""` |
+| `dataStorage.accessMode` | Access mode | `ReadWriteOnce` |
+| `dataStorage.existingClaim` | Use existing PVC | `""` |
+
+**When to enable persistence:**
+- Multi-user basic auth with offline access (stores `tokens.db`)
+- Qdrant persistent mode (stores vector database)
+- Any feature requiring persistent app data
+
+**When persistence is disabled:** Uses `emptyDir` (non-persistent, data lost on pod restart, but directory remains writable).
+
+#### MCP Server Configuration
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `mcp.transport` | Transport mode | `streamable-http` |
+| `mcp.port` | Server port (used by both auth modes) | `8000` |
+| `mcp.extraArgs` | Additional command-line arguments | `[]` |
+
+The `extraArgs` parameter allows you to pass additional command-line arguments to the MCP server. This is useful for enabling debug logging, enabling specific apps, or other runtime configuration.
+
+**Example:**
+```yaml
+mcp:
+  extraArgs:
+    - "--log-level"
+    - "debug"
+    - "--enable-app"
+    - "notes"
+```
+
 #### Image Configuration
 
 | Parameter | Description | Default |
 |-----------|-------------|---------|
 | `image.repository` | Container image repository | `ghcr.io/cbcoutinho/nextcloud-mcp-server` |
-| `image.tag` | Container image tag | `""` (uses chart appVersion) |
 | `image.pullPolicy` | Image pull policy | `IfNotPresent` |
 
+**Note:** Image tag is automatically set to the chart's `appVersion` and cannot be overridden.
+
 #### Resources
 
 | Parameter | Description | Default |
@@ -137,7 +181,6 @@ ingress:
 |-----------|-------------|---------|
 | `service.type` | Service type | `ClusterIP` |
 | `service.port` | Service port | `8000` |
-| `service.oauthPort` | OAuth service port | `8001` |
 
 #### Ingress
 
@@ -182,6 +225,146 @@ The application exposes HTTP health check endpoints:
 | `documentProcessing.unstructured.apiUrl` | Unstructured API URL | `http://unstructured:8000` |
 | `documentProcessing.tesseract.enabled` | Enable Tesseract OCR | `false` |
 
+#### Vector Search & Semantic Capabilities (Optional)
+
+Enable semantic search capabilities with BM25 hybrid search by deploying a vector database (Qdrant) and embedding service (Ollama or OpenAI).
+
+**Semantic Search Configuration:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `semanticSearch.enabled` | Enable semantic search and background vector synchronization | `false` |
+| `semanticSearch.scanInterval` | Scan interval in seconds | `3600` |
+| `semanticSearch.processorWorkers` | Number of concurrent processor workers | `3` |
+| `semanticSearch.queueMaxSize` | Maximum queue size for pending documents | `10000` |
+
+**Document Chunking Configuration:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `documentChunking.chunkSize` | Number of words per chunk for embedding | `512` |
+| `documentChunking.chunkOverlap` | Number of overlapping words between chunks | `50` |
+
+**Chunking Strategy:**
+- **Small chunks (256-384)**: Better precision for searches, more storage overhead
+- **Medium chunks (512-768)**: Balanced approach (recommended for most use cases)
+- **Large chunks (1024+)**: Better context preservation, less precise matching
+- **Overlap**: Should be 10-20% of chunk size to preserve context across boundaries
+
+**Qdrant Vector Database:**
+
+Qdrant is deployed as a subchart when `qdrant.enabled` is `true`. All configuration values are passed through to the [qdrant/qdrant](https://github.com/qdrant/qdrant-helm) chart.
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `qdrant.enabled` | Deploy Qdrant as a subchart | `false` |
+| `qdrant.replicaCount` | Number of Qdrant replicas | `1` |
+| `qdrant.image.tag` | Qdrant version | `v1.12.5` |
+| `qdrant.apiKey` | Optional API key for authentication | `""` |
+| `qdrant.persistence.size` | Storage size for vector data | `10Gi` |
+| `qdrant.persistence.storageClass` | Storage class | `""` |
+| `qdrant.resources.requests.cpu` | CPU request | `200m` |
+| `qdrant.resources.requests.memory` | Memory request | `512Mi` |
+| `qdrant.resources.limits.cpu` | CPU limit | `1000m` |
+| `qdrant.resources.limits.memory` | Memory limit | `2Gi` |
+
+**Ollama Embedding Service:**
+
+Ollama is deployed as a subchart when `ollama.enabled` is `true`. All configuration values are passed through to the [ollama/ollama](https://github.com/otwld/ollama-helm) chart. Alternatively, set `ollama.url` to use an external Ollama instance.
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `ollama.enabled` | Deploy Ollama as a subchart | `false` |
+| `ollama.url` | External Ollama URL (use with `enabled: false`) | `""` |
+| `ollama.embeddingModel` | Embedding model to use | `nomic-embed-text` |
+| `ollama.verifySsl` | Verify SSL certificates | `true` |
+| `ollama.replicaCount` | Number of Ollama replicas | `1` |
+| `ollama.ollama.models.pull` | Models to pull on startup | `["nomic-embed-text"]` |
+| `ollama.persistentVolume.enabled` | Enable persistent storage | `true` |
+| `ollama.persistentVolume.size` | Storage size for models | `20Gi` |
+| `ollama.resources.requests.cpu` | CPU request | `500m` |
+| `ollama.resources.requests.memory` | Memory request | `1Gi` |
+| `ollama.resources.limits.cpu` | CPU limit | `2000m` |
+| `ollama.resources.limits.memory` | Memory limit | `4Gi` |
+
+**OpenAI Embedding Provider (Alternative):**
+
+Use OpenAI or any OpenAI-compatible API instead of Ollama.
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `openai.enabled` | Enable OpenAI embedding provider | `false` |
+| `openai.apiKey` | OpenAI API key | `""` |
+| `openai.existingSecret` | Use existing secret for API key | `""` |
+| `openai.secretKey` | Key in secret containing API key | `api-key` |
+| `openai.baseUrl` | Custom API endpoint (optional) | `""` |
+
+#### Observability & Monitoring
+
+The chart includes comprehensive observability features including Prometheus metrics, OpenTelemetry tracing, and Grafana dashboards.
+
+**Metrics Configuration:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `observability.metrics.enabled` | Enable Prometheus metrics | `true` |
+| `observability.metrics.port` | Metrics port | `9090` |
+| `observability.metrics.path` | Metrics endpoint path | `/metrics` |
+
+**Tracing Configuration:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `observability.tracing.enabled` | Enable OpenTelemetry tracing | `false` |
+| `observability.tracing.endpoint` | OTLP collector endpoint | `""` |
+| `observability.tracing.serviceName` | Service name in traces | `nextcloud-mcp-server` |
+| `observability.tracing.samplingRate` | Trace sampling rate (0.0-1.0) | `1.0` |
+
+**Logging Configuration:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `observability.logging.format` | Log format (json or text) | `json` |
+| `observability.logging.level` | Log level | `INFO` |
+| `observability.logging.includeTraceContext` | Include trace IDs in logs | `true` |
+
+**ServiceMonitor (Prometheus Operator):**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `serviceMonitor.enabled` | Create ServiceMonitor resource | `false` |
+| `serviceMonitor.interval` | Scrape interval | `30s` |
+| `serviceMonitor.scrapeTimeout` | Scrape timeout | `10s` |
+| `serviceMonitor.labels` | Additional labels for ServiceMonitor | `{}` |
+
+**PrometheusRule (Prometheus Operator):**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `prometheusRule.enabled` | Create PrometheusRule with alert rules | `false` |
+| `prometheusRule.labels` | Additional labels for PrometheusRule | `{}` |
+
+**Grafana Dashboards:**
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `dashboards.enabled` | Enable automatic dashboard provisioning | `false` |
+| `dashboards.grafanaFolder` | Grafana folder name for dashboards | `Nextcloud MCP` |
+| `dashboards.labels` | Additional labels for dashboard ConfigMap | `{}` |
+| `dashboards.annotations` | Additional annotations for dashboard ConfigMap | `{}` |
+
+When `dashboards.enabled` is `true`, a ConfigMap with the Grafana dashboard is created with the `grafana_dashboard: "1"` label. This enables automatic discovery by Grafana sidecar containers (commonly used with kube-prometheus-stack).
+
+The dashboard provides comprehensive monitoring including:
+- HTTP request metrics (RED pattern: Rate, Errors, Duration)
+- MCP tool performance and errors
+- Nextcloud API performance by app (notes, calendar, contacts, etc.)
+- OAuth token operations and cache hit rates
+- External dependency health (Nextcloud, Qdrant, Keycloak, Unstructured API)
+- Vector sync processing pipeline (when enabled)
+
+For manual import or more details, see `charts/nextcloud-mcp-server/dashboards/README.md`.
+
 ## Examples
 
 ### Example 1: Basic Auth with Ingress
@@ -263,7 +446,7 @@ nextcloud:
   host: https://cloud.example.com
   # mcpServerUrl and publicIssuerUrl are optional!
   # If not set, mcpServerUrl defaults to ingress host or localhost
-  # publicIssuerUrl defaults to nextcloud.host
+  # publicIssuerUrl defaults to nextcloud.host (only used for browser-accessible auth endpoint)
 
 auth:
   mode: oauth
@@ -295,7 +478,7 @@ This example shows OAuth without pre-registered credentials (using DCR) and opti
 nextcloud:
   host: https://cloud.example.com
   # mcpServerUrl will automatically use ingress host (https://mcp.example.com)
-  # publicIssuerUrl will automatically default to nextcloud.host
+  # publicIssuerUrl will automatically default to nextcloud.host (only used for browser-accessible auth endpoint)
 
 auth:
   mode: oauth
@@ -359,19 +542,106 @@ affinity:
           topologyKey: kubernetes.io/hostname
 ```
 
+### Example 5: Semantic Search with Qdrant and Ollama
+
+Deploy with vector search capabilities using embedded Qdrant and Ollama:
+
+```yaml
+nextcloud:
+  host: https://cloud.example.com
+
+auth:
+  mode: basic
+  basic:
+    username: admin
+    password: secure-password
+
+# Enable semantic search
+semanticSearch:
+  enabled: true
+  scanInterval: 1800  # Scan every 30 minutes
+  processorWorkers: 5
+
+# Deploy Qdrant as a subchart
+qdrant:
+  enabled: true
+  persistence:
+    size: 20Gi
+    storageClass: fast-ssd
+  resources:
+    requests:
+      cpu: 500m
+      memory: 1Gi
+    limits:
+      cpu: 2000m
+      memory: 4Gi
+
+# Deploy Ollama as a subchart
+ollama:
+  enabled: true
+  embeddingModel: nomic-embed-text
+  persistentVolume:
+    size: 30Gi
+    storageClass: standard
+  resources:
+    requests:
+      cpu: 1000m
+      memory: 2Gi
+    limits:
+      cpu: 4000m
+      memory: 8Gi
+```
+
+Or use an external Ollama instance:
+
+```yaml
+semanticSearch:
+  enabled: true
+
+qdrant:
+  enabled: true
+
+# Use external Ollama instead of deploying subchart
+ollama:
+  enabled: false
+  url: "http://ollama.ai-services.svc.cluster.local:11434"
+  embeddingModel: nomic-embed-text
+```
+
+Or use OpenAI for embeddings:
+
+```yaml
+semanticSearch:
+  enabled: true
+
+qdrant:
+  enabled: true
+
+# Use OpenAI instead of Ollama
+openai:
+  enabled: true
+  apiKey: "sk-..."
+  # Or use existing secret:
+  # existingSecret: openai-api-key
+  # secretKey: api-key
+```
+
 ## Upgrading
 
 ### To upgrade an existing deployment:
 
 ```bash
-helm upgrade nextcloud-mcp ./helm/nextcloud-mcp-server -f custom-values.yaml
+# Update the repository
+helm repo update
+
+# Upgrade with your custom values
+helm upgrade nextcloud-mcp nextcloud-mcp/nextcloud-mcp-server -f custom-values.yaml
 ```
 
 ### To upgrade with new values:
 
 ```bash
-helm upgrade nextcloud-mcp ./helm/nextcloud-mcp-server \
-  --set image.tag=0.21.0 \
+helm upgrade nextcloud-mcp nextcloud-mcp/nextcloud-mcp-server \
   --set resources.limits.memory=1Gi
 ```
 
@@ -438,7 +708,9 @@ Readiness (returns 200 if ready, 503 if not ready):
 
 1. **Connection refused to Nextcloud**
    - Verify `nextcloud.host` is accessible from the Kubernetes cluster
+   - For OAuth mode: Ensure MCP server can reach OIDC discovery endpoints (token, JWKS, introspection, userinfo URLs)
    - Check network policies and firewall rules
+   - Note: Do not use internal Docker hostnames (like `http://app:80`) for `nextcloud.host` - use externally resolvable URLs
 
 2. **Authentication failures**
    - For basic auth: verify username/password are correct

index.html

@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Nextcloud MCP Server Helm Chart</title>
+    <style>
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+            max-width: 800px;
+            margin: 50px auto;
+            padding: 20px;
+            line-height: 1.6;
+        }
+        code {
+            background: #f4f4f4;
+            padding: 2px 6px;
+            border-radius: 3px;
+            font-family: "Monaco", "Courier New", monospace;
+        }
+        pre {
+            background: #f4f4f4;
+            padding: 15px;
+            border-radius: 5px;
+            overflow-x: auto;
+        }
+        h1, h2 { color: #0082c9; }
+        a { color: #0082c9; text-decoration: none; }
+        a:hover { text-decoration: underline; }
+    </style>
+</head>
+<body>
+    <h1>Nextcloud MCP Server Helm Chart</h1>
+
+    <p>A Helm chart for deploying the Nextcloud MCP (Model Context Protocol) Server on Kubernetes, enabling AI assistants to interact with your Nextcloud instance.</p>
+
+    <h2>Installation</h2>
+
+    <p>Add the Helm repository:</p>
+    <pre><code>helm repo add nextcloud-mcp https://cbcoutinho.github.io/nextcloud-mcp-server/
+helm repo update</code></pre>
+
+    <p>Install the chart:</p>
+    <pre><code>helm install nextcloud-mcp nextcloud-mcp/nextcloud-mcp-server \
+  --set nextcloud.host=https://cloud.example.com \
+  --set auth.basic.username=myuser \
+  --set auth.basic.password=mypassword</code></pre>
+
+    <h2>Documentation</h2>
+
+    <ul>
+        <li><a href="README.md">Chart README</a> - Full documentation for the Helm chart</li>
+        <li><a href="https://github.com/cbcoutinho/nextcloud-mcp-server">GitHub Repository</a> - Source code and issues</li>
+        <li><a href="index.yaml">Helm Repository Index</a> - Chart metadata</li>
+    </ul>
+
+    <h2>Quick Start</h2>
+
+    <p>See the <a href="README.md">full documentation</a> for detailed configuration options, examples, and troubleshooting guides.</p>
+
+    <hr>
+    <p><small>Generated by <a href="https://github.com/helm/chart-releaser">chart-releaser</a></small></p>
+</body>
+</html>