Merge pull request #302 from cbroglie/external-metrics

Demonstrate how to use external metrics

README.md

@@ -3,8 +3,9 @@
 [![Build Status](https://travis-ci.org/DirectXMan12/k8s-prometheus-adapter.svg?branch=master)](https://travis-ci.org/DirectXMan12/k8s-prometheus-adapter)
 
 This repository contains an implementation of the Kubernetes
-[resource metrics](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/resource-metrics-api.md) API and
+[resource metrics](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/resource-metrics-api.md),
-[custom metrics](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/custom-metrics-api.md) API.
+[custom metrics](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/custom-metrics-api.md), and
+[external metrics](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/instrumentation/external-metrics-api.md) APIs.
 
 This adapter is therefore suitable for use with the autoscaling/v2 Horizontal Pod Autoscaler in Kubernetes 1.6+.  
 It can also replace the [metrics server](https://github.com/kubernetes-incubator/metrics-server) on clusters that already run Prometheus and collect the appropriate metrics.

deploy/manifests/custom-metrics-apiservice.yaml

@@ -11,3 +11,32 @@ spec:
   insecureSkipTLSVerify: true
   groupPriorityMinimum: 100
   versionPriority: 100
+---
+apiVersion: apiregistration.k8s.io/v1beta1
+kind: APIService
+metadata:
+  name: v1beta2.custom.metrics.k8s.io
+spec:
+  service:
+    name: custom-metrics-apiserver
+    namespace: custom-metrics
+  group: custom.metrics.k8s.io
+  version: v1beta2
+  insecureSkipTLSVerify: true
+  groupPriorityMinimum: 100
+  versionPriority: 200
+---
+apiVersion: apiregistration.k8s.io/v1beta1
+kind: APIService
+metadata:
+  name: v1beta1.external.metrics.k8s.io
+spec:
+  service:
+    name: custom-metrics-apiserver
+    namespace: custom-metrics
+  group: external.metrics.k8s.io
+  version: v1beta1
+  insecureSkipTLSVerify: true
+  groupPriorityMinimum: 100
+  versionPriority: 100
+---

deploy/manifests/custom-metrics-cluster-role.yaml

@@ -5,5 +5,6 @@ metadata:
 rules:
 - apiGroups:
   - custom.metrics.k8s.io
+  - external.metrics.k8s.io
   resources: ["*"]
   verbs: ["*"]

deploy/manifests/custom-metrics-config-map.yaml

@@ -96,3 +96,22 @@ data:
               resource: pod
         containerLabel: container_name
       window: 1m
+    externalRules:
+    - seriesQuery: '{__name__=~"^.*_queue_(length|size)$",namespace!=""}'
+      resources:
+        overrides:
+          namespace:
+            resource: namespace
+      name:
+        matches: ^.*_queue_(length|size)$
+        as: "$0"
+      metricsQuery: max(<<.Series>>{<<.LabelMatchers>>})
+    - seriesQuery: '{__name__=~"^.*_queue$",namespace!=""}'
+      resources:
+        overrides:
+          namespace:
+            resource: namespace
+      name:
+        matches: ^.*_queue$
+        as: "$0"
+      metricsQuery: max(<<.Series>>{<<.LabelMatchers>>})