Skip to main content
The GCP managed instance group (manual) target controls a group’s target size directly. Use it for a managed instance group whose size is owned through resize operations. Arklow clamps each requested size to the target’s minimum and maximum before sending the resize operation. Google Cloud may take time to create or remove instances, and Arklow continues observing the group while it converges.
A Google Cloud autoscaler can overwrite direct resize operations. Use the autoscaler floor target for a group managed by an autoscaler.

​
Configuration

This mode uses the shared group fields. It has no autoscaler field. The target’s Minimum replicas and Maximum replicas bound every requested group size.

​
Required permissions

The selected GCP Service Account credential needs:
You can place these permissions in a custom role scoped to the project containing the group.

​
Add a desired-count target

1

Open scale targets

Go to Scale Targets, click New scale target, and select GCP managed instance group (manual).
2

Identify the group

Enter its project, location type, location, and instance group manager.
3

Select authentication

Choose the GCP Service Account credential with permission to read and resize the group.
4

Select capacity

Choose the destination or shared pool served by the group.
5

Set the envelope

Enter the minimum and maximum group sizes Arklow may request.
6

Save

Create the target and confirm that the observed target size belongs to the expected group.