$ 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=ALERTS{alertname="Watchdog"}' | jq
{
  "status": "success",
  "data": {
    "resultType": "vector",
    "result": [
      {
        "metric": {
          "__name__": "ALERTS",
          "alertname": "Watchdog",
          "alertstate": "firing",
          "namespace": "openshift-monitoring",
          "prometheus": "openshift-monitoring/k8s",
          "severity": "none"
        },
        "value": [
          1733972986.595,
          "1"
        ]
      }
    ],
    "analysis": {}
  }
}

$ oc -n openshift-monitoring exec -c prometheus prometheus-k8s-0 -- curl -k -H "Authorization: Bearer $token" 'https://alertmanager-main.openshift-monitoring.svc:9094/api/v2/alerts?&filter={alertname="Watchdog"}' | jq
  {
    "annotations": {
      "description": "This is an alert meant to ensure that the entire alerting pipeline is functional.\nThis alert is always firing, therefore it should always be firing in Alertmanager\nand always fire against a receiver. There are integrations with various notification\nmechanisms that send a notification when this alert is not firing. For example the\n\"DeadMansSnitch\" integration in PagerDuty.\n",
      "summary": "An alert that should always be firing to certify that Alertmanager is working properly."
    },
    "endsAt": "2024-12-12T09:19:41.073Z",
    "fingerprint": "6934731368443c07",
    "receivers": [
      {
        "name": "Watchdog"
      }
    ],
    "startsAt": "2024-12-12T00:05:11.073Z",
    "status": {
      "inhibitedBy": [],
      "silencedBy": [],
      "state": "active"
    },
    "updatedAt": "2024-12-12T09:15:41.075Z",
    "generatorURL": "https://console-openshift-console.apps.anli41712.qe.devcluster.openshift.com/monitoring/graph?g0.expr=vector%281%29&g0.tab=1",
    "labels": {
      "alertname": "Watchdog",
      "namespace": "openshift-monitoring",
      "openshift_io_alert_source": "platform",
      "prometheus": "openshift-monitoring/k8s",
      "severity": "none"
    }
  }
]

namespace=openshift-monitoring
prometheus=openshift-monitoring/k8s
severity=none
alertname=Watchdog 

namespace=openshift-monitoring
prometheus=openshift-monitoring/k8s
severity=none
alertname=Watchdog 

alertname=Watchdog
namespace=openshift-monitoring
severity=none

namespace=openshift-monitoring
prometheus=openshift-monitoring/k8s
severity=none
alertname=Watchdog 

only for 4.17

always for 4.17

1. see the descriptions

did not see prometheus=openshift-monitoring/k8s label in 4.17 admin console alert details page

 should see the label