I am using DirectXMan12/k8s-prometheus-adapte to push the external metric from Prometheus to Kubernetes.
After pushing the external metric how can I verify the data is k8s?
When I hit kubectl get --raw /apis/external.metrics.k8s.io/v1beta1 | jq I got the following result but after that, I do not have an idea how to fetch actual metrics value
{
"kind": "APIResourceList",
"apiVersion": "v1",
"groupVersion": "external.metrics.k8s.io/v1beta1",
"resources": [
{
"name": "subscription_back_log",
"singularName": "",
"namespaced": true,
"kind": "ExternalMetricValueList",
"verbs": [
"get"
]
}]
}
actual metric value is fetched per instance, for example, the metric you attached is namespaced: true, assuming the metric is for pods, you can access the actual data at
kubectl get --raw "/apis/external.metrics.k8s.io/v1beta1/namespaces/wanted_namepsace/pods/*/subscription_back_log" | jq '.'(or specify the pod name instead of *)
If you want HPA to read you metric, the configurations are (for example)
apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: your-hpa
spec:
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: your-pod
minReplicas: 1
maxReplicas: 10
metrics:
- pods:
metricName: subscription_back_log
targetAverageValue: 10000
type: Pods