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Installation with Monitoring

For monitoring setup, you’ll need to add the metricsApiKey and prometheus.enabled=true to the values.yaml file.

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Access Grafana

LangWatch includes integrated Prometheus monitoring for observability. The monitoring is built into the main LangWatch chart and can be enabled with a simple configuration.

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Quick Setup

# Generate all required secrets including metrics key
export NEXTAUTH_SECRET=$(openssl rand -base64 32)
export API_TOKEN_JWT_SECRET=$(openssl rand -base64 32)
export CRON_API_KEY=$(openssl rand -base64 32)
export METRICS_API_KEY=$(openssl rand -base64 32)  # ← Required for monitoring

# Deploy LangWatch with monitoring enabled
helm install langwatch ./langwatch \
  --set app.env.NEXTAUTH_SECRET=$NEXTAUTH_SECRET \
  --set app.env.API_TOKEN_JWT_SECRET=$API_TOKEN_JWT_SECRET \
  --set app.env.BASE_HOST="http://localhost:5560" \
  --set app.env.NEXTAUTH_URL="http://localhost:5560" \
  --set app.env.CRON_API_KEY=$CRON_API_KEY \
  --set global.monitoring.enabled=true \
  --set global.monitoring.metricsApiKey=$METRICS_API_KEY \
  --set prometheus.enabled=true

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Access Prometheus

# Port forward for development
kubectl port-forward svc/langwatch-prometheus 9090:9090
Access Prometheus at: http://localhost:9090

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What Gets Monitored

  • LangWatch App: Main application metrics (port 5560)
  • LangWatch Workers: Worker metrics (port 2999)
  • Kubernetes Infrastructure: Node and container metrics via cAdvisor

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Prometheus Configuration

The Prometheus configuration can be customized through the prometheus section in values.yaml: 
prometheus:
  enabled: false # Set to true to enable
  image:
    repository: quay.io/prometheus/prometheus
    tag: "v3.0.1"
  service:
    type: ClusterIP # Change to LoadBalancer for external access
    port: 9090
  storage:
    enabled: true
    size: 6Gi
    storageClass: "" # Use default storage class
  retention: 60d
  rbac:
    enabled: true

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LangWatch Pod Annotations

For Prometheus to discover your LangWatch pods, ensure they have the correct annotations: 
metadata:
  annotations:
    prometheus.io/scrape: "true"
    prometheus.io/port: "5560" # For main app
    prometheus.io/path: "/metrics" # For workers with custom paths

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LangWatch Dashboard

You can find the LangWatch dashboard template here. Grafana