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Set Maximum Scale Down Percentage for Virtual Node Group or Cluster (GKE) via the Console

Cloud service provider relevance: GKE

The Maximum Scale-down Percentage (maxScaleDownPercentage) is the maximum percentage allowed to scale down in a single scaling action on the nodes running in a specific Virtual Node Group or the entire cluster.

You can apply the maxScaleDownPercentage attribute via the Ocean console at either the cluster or Virtual Node Group level. The boundaries are 0-100 %, and the default value is 10%.

Note the following:

  • When you create a cluster, maxScaleDownPercentage is turned on for the cluster by default.
  • When you create a Virtual Node Group, maxScaleDownPercentage is turned off by default.
  • maxScaleDownPercentage is mutually exclusive. You cannot apply it simultaneously at both the cluster and Virtual Node Group levels.

Set Maximum Scale Down Percentage for a Cluster​

To set the maximum scale-down percentage for a cluster:

  1. Click Ocean > Cloud Clusters in the left main menu.
  2. Select a cluster from the list of clusters.
  3. From the Actions drop-down menu on the top-right of the screen, click Customize Scaling.

The maximum scale-down percentage is turned on by default. Accept or change the default 10 % value and save your changes.

autoscaling-enabled-at-cluster-level

note

If you previously set the maximum scale-down percentage for a Virtual Node Group in the cluster, the Virtual Node Group value applies (not the cluster value). In addition, each Virtual Node Group for which you did not specifically set a value will use the default 10% value. In the example below, 50% was set for the cluster.

cluster-when-vng-was-enabled

note

You can set maxScaleDownPercentage for a cluster from the Spot API under autoScaler > down.

Set Maximum Scaledown Percentage for a Virtual Node Group​

To set the maximum scale-down percentage for a Virtual Node Group:

  1. Click Ocean > Cloud Clusters in the left main menu.
  2. Select a cluster from the list of clusters.
  3. In the Virtual Node Groups (VNG) tab, select the specific Virtual Node Group.
  4. Scroll down to the Advanced panel.
  5. By default, the maximum scale-down percentage is turned off. Click to turn it on. Accept or change the current value, and save your changes.

gke-scale-down-max-vng-level

note

If you turn off the maximum scale-down percentage for all your Virtual Node Groups, the value set at the cluster level will apply, and you can adjust that value.

You can set maxScaleDownPercentage for a Virtual Node Group from the Spot API under launchSpec > down.