[stable/cluster-autoscaler] Adds support for affinity to the cluster …

…autoscaler (#2298)

* Add affinity to cluster autoscaler

* Add affinity to values.yaml

* Bump cluster-autoscaler to 0.2.1

stable/cluster-autoscaler/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Scales worker nodes within autoscaling groups.
 icon: https://github.com/kubernetes/kubernetes/blob/master/logo/logo.png
 name: cluster-autoscaler
-version: 0.2.0
+version: 0.2.1
 sources:
 - https://github.com/kubernetes/autoscaler/tree/master/cluster-autoscaler
 - https://github.com/spotinst/kubernetes-autoscaler/tree/master/cluster-autoscaler

stable/cluster-autoscaler/README.md

@@ -92,6 +92,7 @@ The following tables lists the configurable parameters of the cluster-autoscaler
 
 Parameter | Description | Default
 --- | --- | ---
+`affinity` | node/pod affinities | None
 `autoscalingGroups[].name` | autoscaling group name | None. You *must* supply at least one.
 `autoscalingGroups[].maxSize` | maximum autoscaling group size | None. You *must* supply at least one.
 `autoscalingGroups[].minSize` | minimum autoscaling group size | None. You *must* supply at least one.

stable/cluster-autoscaler/templates/deployment.yaml

@@ -63,6 +63,10 @@ spec:
             - name: ssl-certs
               mountPath: /etc/ssl/certs/ca-certificates.crt
               readOnly: true
+    {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+    {{- end }}
     {{- if .Values.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.nodeSelector | indent 8 }}

stable/cluster-autoscaler/values.yaml

@@ -22,6 +22,10 @@ extraArgs: {}
   # skip-nodes-with-local-storage: false
   # skip-nodes-with-system-pods: true
 
+## Affinity for pod assignment
+## Ref: https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity
+## affinity: {}
+
 ## Node labels for pod assignment
 ## Ref: https://kubernetes.io/docs/user-guide/node-selection/
 ##