Cluster.spec.rkeConfig.machinePools[].userdata

Additional userdata to merge with rancher-defined userdata. Currently, this field is only supported for external CAPI infrastructure providers, and will have no effect for Rancher-provisioned nodes. Userdata for Rancher-provisioned nodes can be set in the machine configuration. WARNING: Do not include sensitive data, this field is visible in non-Secret API objects. EXPERIMENTAL: this field is experimental and future compatibility is not guaranteed.