Do no destroy all Virtual machines at the same time

Terraform
1

Hi!

When I, for example, want to change something my terraform kills all Virtual Machines at the same time in my GCP Cloud. I want to kill the first machine after restore it and then kill the second machine and so on. Because I don’t want any downtime when it has a failover mode.
Do you have any ideas?

2

create_before_destroy (https://www.terraform.io/docs/configuration/resources.html#lifecycle-lifecycle-customizations)

An interesting article on deployment options:

Maybe this could help.