Disable the cluster autoscaler

To disable the cluster autoscaler, you delete the corresponding ClusterAutoscaler resource.

Note

Disabling the cluster autoscaler disables autoscaling on the cluster, even if the cluster has existing machine autoscalers.
Procedure

  1. List the ClusterAutoscaler resource for the cluster by running the following command:

    $ oc get ClusterAutoscaler
    Example output
    NAME      AGE
default   42m

  2. Optional: Create a YAML file backup of the ClusterAutoscaler CR by running the following command:

    $ oc get ClusterAutoscaler/default \
  -o yaml> <cluster_autoscaler_backup_name>.yaml

    where:

    <cluster_autoscaler_backup_name>

    Specifies the file name in which to store the backup.

  3. Delete the ClusterAutoscaler CR by running the following command:

    $ oc delete ClusterAutoscaler/default
    Example output
    clusterautoscaler.autoscaling.openshift.io "default" deleted
Verification

  • To verify that the cluster autoscaler is disabled, run the following command:

    $ oc get ClusterAutoscaler
    Expected output
    No resources found
Next steps

  • Disabling the cluster autoscaler by deleting the ClusterAutoscaler CR prevents the cluster from autoscaling but does not delete any existing machine autoscalers on the cluster. To clean up unneeded machine autoscalers, see "Disabling a machine autoscaler".

  • If you need to re-enable the cluster autoscaler, use the <cluster_autoscaler_name_backup>.yaml backup file and follow the instructions in "Deploying a cluster autoscaler".

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