I'm trying to scale a deployment based on a custom metric coming from a custom metric server. I deployed my server and when I do
kubectl get --raw "/apis/custom.metrics.k8s.io/v1beta1/namespaces/default/services/kubernetes/test-metric"
I get back this JSON
{
"kind": "MetricValueList",
"apiVersion": "custom.metrics.k8s.io/v1beta1",
"metadata": {
"selfLink": "/apis/custom.metrics.k8s.io/v1beta1/namespaces/default/services/kubernetes/test-metric"
},
"items": [
{
"describedObject": {
"kind": "Service",
"namespace": "default",
"name": "kubernetes",
"apiVersion": "/v1"
},
"metricName": "test-metric",
"timestamp": "2019-01-26T02:36:19Z",
"value": "300m",
"selector": null
}
]
}
Then I created my hpa.yml using this
apiVersion: autoscaling/v2beta1
kind: HorizontalPodAutoscaler
metadata:
name: test-all-deployment
namespace: default
spec:
maxReplicas: 10
minReplicas: 1
scaleTargetRef:
apiVersion: apps/v1
kind: Deployment
name: test-all-deployment
metrics:
- type: Object
object:
target:
kind: Service
name: kubernetes
apiVersion: custom.metrics.k8s.io/v1beta1
metricName: test-metric
targetValue: 200m
but it doesn't scale and I'm not sure what is wrong. running get hpa returns
NAME REFERENCE TARGETS MINPODS MAXPODS REPLICAS AGE
test-all-deployment Deployment/test-all-deployment <unknown>/200m 1 10 1 9m
The part I'm not sure about is the target object in the metrics collection in the hpa definition. Looking at the doc here https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/
It has
describedObject:
apiVersion: extensions/v1beta1
kind: Ingress
name: main-route
target:
kind: Value
value: 10k
but that gives me a validation error for API v2beta1. and looking at the actual object here https://github.com/kubernetes/api/blob/master/autoscaling/v2beta1/types.go#L296 it doesn't seem to match. I don't know how to specify that with the v2beta1 API.
