Enabling the cluster autoscaler add-on in your cluster

You can enable the add-on from the console or the command the line.

Enabling the cluster autoscaler add-on from the console

From the IBM Cloud Kubernetes Service cluster dashboard, select the cluster where you want to enable autoscaling.
On the Overview page, click Add-ons.
On the Add-ons page, locate the Cluster Autoscaler add-on and click Install

Enable the cluster-autoscaler add-on by running the following command.

ibmcloud ks cluster addon enable cluster-autoscaler --cluster <cluster_name>

Example output

Enabling add-on `cluster-autoscaler` for cluster <cluster_name>...
The add-on might take several minutes to deploy and become ready for use.
OK

Verify that the add-on is installed and Ready.

ibmcloud ks cluster addon ls --cluster <cluster_name>

Example output

NAME                 Version   Health State   Health Status   
cluster-autoscaler   1.0.1     normal         Addon Ready

No worker pools are configured for scaling after enabling the add-on. To set up autoscaling on your worker pools, edit the cluster autoscaler configmap.

The cluster autoscaler has two types of updates.

Patch updates: Patch updates are delivered automatically by IBM and don't contain any feature updates or changes in the supported add-on and cluster versions.
Release updates: Release updates contain new features for the cluster autoscaler or changes in the supported add-on or cluster versions. You must manually apply release updates to your cluster autoscaler add-on.

To update the cluster autoscaler add-on:

Check the version of the cluster autoscaler add-on that is deployed in your cluster. If an update is available, review the release notes for the latest add-on version.
```
ibmcloud ks cluster addon ls --cluster <cluster_name>
```
If you upgrade your cluster to a version that isn't supported by the cluster autoscaler add-on, your apps might experience downtime and your cluster might not scale.

Update the cluster autoscaler add-on.

ibmcloud ks cluster addon update cluster-autoscaler --version <version-to-update> --cluster <cluster_name>

Verify the add-on is successfully updated and Ready.

ibmcloud ks cluster addon ls --cluster <cluster_name>

Edit the autoscaler ConfigMap to stop scaling your working pools.
From the IBM Cloud Kubernetes Service cluster dashboard, select the cluster where you want to enable autoscaling.
On the Overview page, click Add-ons.
On the Add-ons page, locate the Cluster Autoscaler add-on and click Uninstall

Disable the cluster-autoscaler add-on.

ibmcloud ks cluster addon disable cluster-autoscaler --cluster <cluster_name>

Verify that the add-on was removed.

ibmcloud ks cluster addon ls --cluster <cluster_name>