The subnet role name for bootstrap node is not consistent:

1. It's called `Bootstrap` in `openshift-install explain installconfig.platform.aws.vpc.subnets.roles`
...
FIELDS:
    type <string> -required-
      Valid Values: "ClusterNode","EdgeNode","Bootstrap","IngressControllerLB","ControlPlaneExternalLB","ControlPlaneInternalLB"
      Type specifies the type of role (aka function) that the subnet will provide in the cluster.
Role types include ClusterNode, EdgeNode, Bootstrap, IngressControllerLB, ControlPlaneExternalLB, and ControlPlaneInternalLB. 

2. Actually `BootstrapNode` is supported by installer:
level=error msg="failed to fetch Master Machines: failed to load asset \"Install Config\": failed to create install config: invalid \"install-config.yaml\" file: [platform.aws.vpc.subnets[1].roles[2].type: Unsupported value: \"Bootstrap\": supported values: \"BootstrapNode\", \"ClusterNode\", \"ControlPlaneExternalLB\", \"ControlPlaneInternalLB\", \"EdgeNode\", \"IngressControllerLB\", platform.aws.vpc.subnets: Invalid value: []aws.Subnet{aws.Subnet{ID:\"subnet-099756b44ea2c3a12\", Roles:[]aws.SubnetRole{aws.SubnetRole{Type:\"ControlPlaneInternalLB\"}, aws.SubnetRole{Type:\"ClusterNode\"}}}, aws.Subnet{ID:\"subnet-0e9599a396c80bae9\", Roles:[]aws.SubnetRole{aws.SubnetRole{Type:\"IngressControllerLB\"}, aws.SubnetRole{Type:\"ControlPlaneExternalLB\"}, aws.SubnetRole{Type:\"Bootstrap\"}}}}: roles [BootstrapNode] must be assigned to at least 1 subnet]"

3. In design doc [1], it's called `Bootstrap`

[1] https://github.com/openshift/enhancements/pull/1634/files#diff-ffcfdf0d21ba360a17e0ac9846e83eec8ecf0ba8b15d429d42e7de2dbd0bfaf7R69


    

4.19.0-0.nightly-2025-03-14-061055
    

Always
    

    1. openshift-install explain installconfig.platform.aws.vpc.subnets.roles
    2. Specify subnet role `Bootstrap` in config file, and create manifests
    3.
    

consistent bootstrap role name