Create a cluster without default worker pool

[lionelmace]

The UI to provision a cluster recently added the ability to pass a name for the default worker.

The goal is to create provision a new cluster with 3 worker pools: pool1, pool2, pool3 without any default.

Is that usecase supported by this module? I could not find the attribute.

[lionelmace]

^ @vburckhardt

[vkuma17]

@lionelmace i think the ability to change the name in the UI existed for long time. @ocofaigh created this issue to rename the default worker pool to a custom name long time back and I see the issue is already open. I will check with provider team once if this feature is supported.

[ocofaigh]

Right this is not something new - but its not possible to do with terraform as we reported in IBM-Cloud/terraform-provider-ibm#2849 many moons ago. @lionelmace if this is high priority please ping me internally to see how we could escalate.

[vburckhardt]

As mentioned by Conall, this feature is currently unsupported, including in the provider, so it may take some time to put this in motion. However, there's a technically feasible solution with several drawbacks:

1. When creating the cluster, declare two worker pools: one named "default" and the other with your chosen name. Set the minimum number of workers for the “default” pool to 2, then use the "apply" command to create the cluster with these two worker pools.
2. After initial apply, in the Terraform code, change the number of workers in the "default" worker pool to 0 and then apply the changes again.

This effectively results in a cluster with a default worker pool that’s not used (resulting in zero cost after the scale down from 2 to 0 workers in that pool) while having a worker pool with the desired name.