Resource config now in config.kubeStateMetrics

As requested, this updates the resource specification to live directly in config.kubeStateMetrics

It also clarifies the config variables. These names are what google uses in some of their tooling.

(And a slight tweak to the way collectors are specified)

README.md

@@ -369,24 +369,23 @@ The Prometheus `/targets` page will show the kubelet job with the error `403 Una
 #### Authorization problem
 
 The Prometheus `/targets` page will show the kubelet job with the error `401 Unauthorized`, when token authorization is not enabled. Ensure that the `--authorization-mode=Webhook` flag is enabled on all kubelet configurations.
-### kube-state-metrics resource usaged
+
+### kube-state-metrics resource usage
 
 In some environments, kube-state-metrics may need additional
 resources. One driver for more resource needs, is a high number of
 namespaces. There may be others.
 
-kube-state-metrics has it's resources using an
+kube-state-metrics resource allocation is managed by
 [addon-resizer](https://github.com/kubernetes/autoscaler/tree/master/addon-resizer/nanny)
 You can control it's parameters by setting variables in the
 config. They default to:
 
 ``` jsonnet
-    resizer+:: {
-      kubeStateMetrics+:: {
-        cpu: '100m',
-        extraCpu: '2m',
-        memory: '150Mi',
-        extraMemory: '30Mi',
-      },
+    kubeStateMetrics+:: {
+      baseCPU: '100m',
+      cpuPerNode: '2m',
+      baseMemory: '150Mi',
+      memoryPerNode: '30Mi',
     }
 ```

jsonnet/kube-prometheus/kube-state-metrics/kube-state-metrics.libsonnet

@@ -5,19 +5,14 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
     namespace: 'default',
 
     kubeStateMetrics+:: {
-      // when this is an empty string, you get the default set
-      collectors: '',
-      scrapeTimeout: '',
+      collectors: '',  // empty string gets a default set
       scrapeInterval: '30s',
-    },
+      scrapeTimeout: '',
 
-    resizer+:: {
-      kubeStateMetrics+:: {
-        cpu: '100m',
-        extraCpu: '2m',
-        memory: '150Mi',
-        extraMemory: '30Mi',
-      },
+      baseCPU: '100m',
+      baseMemory: '150Mi',
+      cpuPerNode: '2m',
+      memoryPerNode: '30Mi',
     },
 
     versions+:: {
@@ -153,20 +148,19 @@ local k = import 'ksonnet/ksonnet.beta.3/k.libsonnet';
           '--port=8081',
           '--telemetry-host=127.0.0.1',
           '--telemetry-port=8082',
-          '--collectors=' + $._config.kubeStateMetrics.collectors,
-        ]) +
-        container.mixin.resources.withRequests({ cpu: $._config.resizer.kubeStateMetrics.cpu, memory: $._config.resizer.kubeStateMetrics.memory }) +
-        container.mixin.resources.withLimits({ cpu: $._config.resizer.kubeStateMetrics.cpu, memory: $._config.resizer.kubeStateMetrics.memory });
+        ] + if $._config.kubeStateMetrics.collectors != '' then ['--collectors=' + $._config.kubeStateMetrics.collectors] else []) +
+        container.mixin.resources.withRequests({ cpu: $._config.kubeStateMetrics.baseCPU, memory: $._config.kubeStateMetrics.baseMemory }) +
+        container.mixin.resources.withLimits({ cpu: $._config.kubeStateMetrics.baseCPU, memory: $._config.kubeStateMetrics.baseMemory });
 
       local addonResizer =
         container.new('addon-resizer', $._config.imageRepos.addonResizer + ':' + $._config.versions.addonResizer) +
         container.withCommand([
           '/pod_nanny',
           '--container=kube-state-metrics',
-          '--cpu=' + $._config.resizer.kubeStateMetrics.cpu,
-          '--extra-cpu=' + $._config.resizer.kubeStateMetrics.extraCpu,
-          '--memory=' + $._config.resizer.kubeStateMetrics.memory,
-          '--extra-memory=' + $._config.resizer.kubeStateMetrics.extraMemory,
+          '--cpu=' + $._config.kubeStateMetrics.baseCPU,
+          '--extra-cpu=' + $._config.kubeStateMetrics.cpuPerNode,
+          '--memory=' + $._config.kubeStateMetrics.baseMemory,
+          '--extra-memory=' + $._config.kubeStateMetrics.memoryPerNode,
           '--threshold=5',
           '--deployment=kube-state-metrics',
         ]) +