Metric Server HPA not working compatible

[Emir Özbir]

I'm using mongodb-exporter for store/query the metrics via prometheus. I have set up a custom metric server and storing values for that .

That is the evidence of prometheus-exporter and custom-metric-server works compatible .

Query : kubectl get --raw "/apis/custom.metrics.k8s.io/v1beta1/namespaces/monitoring/pods/*/mongodb_mongod_wiredtiger_cache_bytes"

Result : {"kind":"MetricValueList","apiVersion":"custom.metrics.k8s.io/v1beta1","metadata":{"selfLink":"/apis/custom.metrics.k8s.io/v1beta1/namespaces/monitoring/pods/%2A/mongodb_mongod_wiredtiger_cache_bytes"},"items":[{"describedObject":{"kind":"Pod","namespace":"monitoring","name":"mongo-exporter-2-prometheus-mongodb-exporter-68f95fd65d-dvptr","apiVersion":"/v1"},"metricName":"mongodb_mongod_wiredtiger_cache_bytes","timestamp":"TTTTT","value":"0"}]}

In my case when I create a hpa for this custom metrics from mongo exporter, hpa return this error to me :

failed to get mongodb_mongod_wiredtiger_cache_bytes utilization: unable to get metrics for resource mongodb_mongod_wiredtiger_cache_bytes: no metrics returned from resource metrics API

What is the main issue on my case ? I have checked all configs and flow is looking fine, but where is the my mistake .

Help

Thanks :)