add node exporter and otel collector in setup

setup.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Comprehensive setup script for Hetzner server with Docker and user setup
+# Comprehensive setup script for Hetzner server with Docker, user setup, Node Exporter, and OpenTelemetry
 # Exit on error
 set -e
 
@@ -7,6 +7,13 @@ echo "====================================================="
 echo "🚀 STARTING SERVER SETUP"
 echo "====================================================="
 
+# Verify required environment variables
+if [ -z "$OTEL_ENDPOINT" ] || [ -z "$OTEL_USERNAME" ] || [ -z "$OTEL_PASSWORD" ]; then
+    echo "❌ ERROR: Required environment variables are not set!"
+    echo "Please set OTEL_ENDPOINT, OTEL_USERNAME, and OTEL_PASSWORD"
+    exit 1
+fi
+
 echo "🔄 Updating system..."
 apt update && apt upgrade -y
 
@@ -75,10 +82,110 @@ fi
 chown -R openfront:openfront /home/openfront
 echo "Set proper ownership for openfront's home directory"
 
+# Create directory for OpenTelemetry configuration
+echo "📊 Setting up Node Exporter and OpenTelemetry Collector..."
+OTEL_CONFIG_DIR="/home/openfront/otel"
+
+if [ ! -d "$OTEL_CONFIG_DIR" ]; then
+    mkdir -p "$OTEL_CONFIG_DIR"
+    echo "Created OpenTelemetry configuration directory"
+fi
+
+# Generate Base64 auth string
+BASE64_AUTH=$(echo -n "${OTEL_USERNAME}:${OTEL_PASSWORD}" | base64)
+
+# Create OpenTelemetry Collector configuration
+cat > "$OTEL_CONFIG_DIR/otel-collector-config.yaml" << EOF
+receivers:
+  prometheus:
+    config:
+      scrape_configs:
+        - job_name: 'node'
+          scrape_interval: 10s
+          static_configs:
+            - targets: ['localhost:9100']  # Node Exporter endpoint
+          relabel_configs:
+            - source_labels: [__address__]
+              regex: '.*'
+              target_label: openfront.host
+              replacement: "\${HOSTNAME}"
+
+processors:
+  batch:
+    # Batch metrics before sending
+    timeout: 10s
+    send_batch_size: 1000
+
+exporters:
+  otlphttp:
+    endpoint: "${OTEL_ENDPOINT}"
+    headers:
+      Authorization: "Basic ${BASE64_AUTH}"
+    tls:
+      insecure: true  # Set to false in production with proper certs
+
+service:
+  pipelines:
+    metrics:
+      receivers: [prometheus]
+      processors: [batch]
+      exporters: [otlphttp]
+EOF
+
+# Set ownership of all files
+chmod 600 "$OTEL_CONFIG_DIR/otel-collector-config.yaml"
+chown -R openfront:openfront "$OTEL_CONFIG_DIR"
+
+# Run Node Exporter
+echo "🚀 Starting Node Exporter..."
+docker pull prom/node-exporter:latest
+docker rm -f node-exporter 2>/dev/null || true
+docker run -d \
+  --name=node-exporter \
+  --restart=unless-stopped \
+  --net="host" \
+  --pid="host" \
+  -v "/:/host:ro,rslave" \
+  prom/node-exporter:latest \
+  --path.rootfs=/host
+
+# Run OpenTelemetry Collector
+echo "🚀 Starting OpenTelemetry Collector..."
+docker pull otel/opentelemetry-collector-contrib:latest
+docker rm -f otel-collector 2>/dev/null || true
+# Run OpenTelemetry Collector with appropriate permissions
+# Run OpenTelemetry Collector
+echo "🚀 Starting OpenTelemetry Collector..."
+docker pull otel/opentelemetry-collector-contrib:latest
+docker rm -f otel-collector 2>/dev/null || true
+
+docker run -d \
+  --name=otel-collector \
+  --restart=unless-stopped \
+  --network=host \
+  --user=0 \
+  -v "$OTEL_CONFIG_DIR/otel-collector-config.yaml:/etc/otelcol-contrib/config.yaml:ro" \
+  -e OTEL_ENDPOINT="${OTEL_ENDPOINT}" \
+  otel/opentelemetry-collector-contrib:latest
+
+# Check if containers are running
+if docker ps | grep -q node-exporter && docker ps | grep -q otel-collector; then
+  echo "✅ Node Exporter and OpenTelemetry Collector started successfully!"
+else
+  echo "❌ Failed to start containers. Check logs with: docker logs node-exporter or docker logs otel-collector"
+  exit 1
+fi
+
 echo "====================================================="
 echo "🎉 SETUP COMPLETE!"
 echo "====================================================="
 echo "The openfront user has been set up and has Docker permissions."
 echo "UDP buffer sizes have been configured for optimal QUIC/WebSocket performance."
-echo "You can now deploy using the openfront user."
+echo "Node Exporter is collecting system metrics."
+echo "OpenTelemetry Collector is forwarding metrics to your endpoint."
+echo ""
+echo "📝 Configuration:"
+echo "   - Config Directory: $OTEL_CONFIG_DIR"
+echo "   - OpenTelemetry Endpoint: $OTEL_ENDPOINT"
+echo "   - Username: $OTEL_USERNAME"
 echo "====================================================="