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monitoring-deploying-a-sample-service.adoc

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Deploying a sample service

To test monitoring your own services, you can deploy a sample service.

Procedure

  1. Create a YAML file for the service configuration. In this example, it is called prometheus-example-app.yaml.

  2. Fill the file with the configuration for deploying the service:

    apiVersion: v1
kind: Namespace
metadata:
  name: ns1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: prometheus-example-app
  name: prometheus-example-app
  namespace: ns1
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus-example-app
  template:
    metadata:
      labels:
        app: prometheus-example-app
    spec:
      containers:
      - image: quay.io/brancz/prometheus-example-app:v0.2.0
        imagePullPolicy: IfNotPresent
        name: prometheus-example-app
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: prometheus-example-app
  name: prometheus-example-app
  namespace: ns1
spec:
  ports:
  - port: 8080
    protocol: TCP
    targetPort: 8080
    name: web
  selector:
    app: prometheus-example-app
  type: ClusterIP

    This configuration deploys a service named prometheus-example-app in the ns1 project. This service exposes the custom version metric.

  3. Apply the configuration file to the cluster:

    $ oc apply -f prometheus-example-app.yaml

    It will take some time to deploy the service.

  4. You can check that the service is running:

    $ oc -n ns1 get pod
NAME                                      READY     STATUS    RESTARTS   AGE
prometheus-example-app-7857545cb7-sbgwq   1/1       Running   0          81m