apiVersion: v1
kind: Namespace
metadata:
  name: ns2
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: prometheus-example-app
  name: prometheus-example-app
  namespace: ns2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: prometheus-example-app
  template:
    metadata:
      labels:
        app: prometheus-example-app
    spec:
      containers:
      - image: ghcr.io/rhobs/prometheus-example-app:0.5.0
        imagePullPolicy: IfNotPresent
        name: prometheus-example-app
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: prometheus-example-app
  name: prometheus-example-app
  namespace: ns2
spec:
  ports:
  - port: 8080
    protocol: TCP
    targetPort: 8080
    name: web
  selector:
    app: prometheus-example-app
  type: ClusterIP
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: prometheus-example-monitor
  namespace: ns2
spec:
  endpoints:
  - interval: 30s
    port: web
    scheme: http
  namespaceSelector:
    matchNames:
    - ns2
  selector:
    matchLabels:
      app: prometheus-example-app

$ token=`oc create token prometheus-k8s -n openshift-monitoring`
$ oc -n openshift-monitoring exec -c prometheus prometheus-k8s-0 -- curl -k -H "Authorization: Bearer $token" 'https://thanos-querier.openshift-monitoring.svc:9091/api/v1/query?' --data-urlencode 'query=version{namespace="ns2"}' | jq {
  "status": "success",
  "data": {
    "resultType": "vector",
    "result": [
      {
        "metric": {
          "__name__": "version",
          "endpoint": "web",
          "instance": "10.128.2.19:8080",
          "job": "prometheus-example-app",
          "namespace": "ns2",
          "pod": "prometheus-example-app-7895496644-vflb5",
          "prometheus": "openshift-user-workload-monitoring/user-workload",
          "service": "prometheus-example-app",
          "version": "v0.4.2"
        },
        "value": [
          1764310947.411,
          "1"
        ]
      }
    ],
    "analysis": {}
  }
}

4.21

always

1. see the description
    

version is v0.4.2

should be v0.5.0