Monitoring

Web Modeler Self-Managed consists of three components (restapi, webapp, and websocket), each exposing their own endpoints for health monitoring and metrics collection.

Available endpoints

restapi

The restapi component is a Spring Boot application that includes the Spring Boot Actuator, providing health check and metrics endpoints out of the box. These endpoints are served on a separate management port (default: 8091, configurable via RESTAPI_MANAGEMENT_PORT).

Endpoint	Description
<server>:8091/metrics	Prometheus metrics
<server>:8091/health/readiness	Readiness probe
<server>:8091/health/liveness	Liveness probe

webapp

The webapp component is a Node.js application that exposes health check and metrics endpoints on a dedicated management port (default: 8071).

Endpoint	Description
<server>:8071/metrics	Prometheus metrics
<server>:8071/health/readiness	Readiness probe
<server>:8071/health/liveness	Liveness probe

websocket

The websocket component provides a basic health check endpoint on its default application port (8060).

Endpoint	Description
<server>:8060/up	Health check

note

The websocket component does not expose a metrics endpoint.

Using probes in Kubernetes

Readiness probe:

readinessProbe:
  httpGet:
    path: /health/readiness
    port: 8071
  initialDelaySeconds: 30
  periodSeconds: 30

Liveness probe:

livenessProbe:
  httpGet:
    path: /health/liveness
    port: 8071
  initialDelaySeconds: 30
  periodSeconds: 30