Application Monitoring Test

When application monitoring is configured on a cluster, you can check its operation using any application with metrics in the OpenMetrics format. The instructions use a demo application from VictoriaMetrics.

To check monitoring using the VictoriaMetrics application, you will need:

• host/machine/computer with git and docker utilities installed. This is necessary to download the source code and build the application image;
• local or public Registry, to host the assembled application image. As a Registry, you can use a local mirror in a closed loop or hub.docker.com in an open installation.

1. Go to the Namespaces section in your cluster, create a namespace demo-app, in which the VictoriaMetrics demo application demo-app will be deployed:

2. From the command line interface, connect to the cluster and run the commands to download the application, assemble it into a container, and push it to the local mirror repository using your parameter values.

git clone https://github.com/VictoriaMetrics/demo-app
cd demo-app/
REGISTRY=<YOUR-PARAMETER-VALUE> TAG=<YOUR-PARAMETER-VALUE> make docker-push

3. In the GUI, using import manifests, load into the cluster: Deployment, Service, VMServiceScrape, as follows (without changing the parameters).

apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo-app
  namespace: demo-app
  labels:
    app.kubernetes.io/name: demo-app
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: demo-app
  template:
    metadata:
      labels:
        app.kubernetes.io/name: demo-app
    spec:
      containers:
        - name: app
          image: r.shturval.tech/victoriametrics/demo-app:1.2
---
apiVersion: v1
kind: Service
metadata:
  name: demo-app
  namespace: demo-app
  labels:
    app.kubernetes.io/name: demo-app
spec:
  selector:
    app.kubernetes.io/name: demo-app
  ports:
    - port: 8080
      name: http
---
apiVersion: operator.victoriametrics.com/v1beta1
kind: VMServiceScrape
metadata:
  name: demo-app-service-scrape
  namespace: demo-app
spec:
  endpoints:
    - port: http
  selector:
    matchLabels:
      app.kubernetes.io/name: demo-app