cluster-autoscaler: update chart

Longhorn-2203

Signed-off-by: Chin-Ya Huang <chin-ya.huang@suse.com>

chart/questions.yaml

@@ -497,6 +497,17 @@ WARNING:
     min: 0
     max: 40
     default: 12
+- variable: defaultSettings.kubernetesClusterAutoscalerEnabled
+    label: Kubernetes Cluster Autoscaler Enabled (Experimental)
+    description: "Enable this setting will notify Longhorn that the cluster is using Kubernetes cluster-autoscaler.
+    Longhorn prevents data loss by only allowing CA to scale down a node that met all conditions:
+      - No volume attached
+      - Is not the last node containing the replica of a detached volume.
+      - Is not running backing image components pod.
+      - Is not running share manager components pod."
+    group: "Longhorn Default Settings"
+    type: boolean
+    default: false
 - variable: persistence.defaultClass
   default: "true"
   description: "Set as default StorageClass for Longhorn"

chart/templates/default-setting.yaml

@@ -42,3 +42,4 @@ data:
     backing-image-recovery-wait-interval: {{ .Values.defaultSettings.backingImageRecoveryWaitInterval }}
     guaranteed-engine-manager-cpu: {{ .Values.defaultSettings.guaranteedEngineManagerCPU }}
     guaranteed-replica-manager-cpu: {{ .Values.defaultSettings.guaranteedReplicaManagerCPU }}
+    kubernetes-cluster-autoscaler-enabled: {{ .Values.defaultSettings.kubernetesClusterAutoscalerEnabled }}

chart/values.yaml

@@ -114,6 +114,7 @@ defaultSettings:
   backingImageRecoveryWaitInterval: ~
   guaranteedEngineManagerCPU: ~
   guaranteedReplicaManagerCPU: ~
+  kubernetesClusterAutoscalerEnabled: ~
 privateRegistry:
   createSecret: ~
   registryUrl: ~