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Arklow can change a Google Cloud managed instance group through its autoscaler or through the group’s target size. Choose the mode that matches the controller already responsible for the group.

Autoscaler floor

Adjust the range available to an existing GCP autoscaler.

Desired count

Resize a managed instance group to a concrete target size.

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Shared configuration

Arklow reads the group’s target size, status, and current instance actions. Pending actions keep the target in a converging state until Google Cloud finishes the change.

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Mode selection

Use GCP managed instance group when the group has a Google Cloud autoscaler. Arklow changes the autoscaler’s minimum and maximum, and the autoscaler remains responsible for the live count. Use GCP managed instance group (manual) when the group is resized directly. Arklow requests a concrete target size within the target’s envelope.