machineType property
The Compute Engine [machine type](/compute/docs/machine-types) used for cluster instances, specified as a [relative resource name](/apis/design/resource_names#relative_resource_name).
For example:
"projects/{projectId}/zones/{zoneId}/machineTypes/{machineTypeId}". The
machineType must belong to the enclosing environment's project and
location. If both this field and nodeConfig.location are specified, this
machineType must belong to the nodeConfig.location; if both are
unspecified, the service will pick a zone in the Compute Engine region
corresponding to the Cloud Composer location, and propagate that choice to
both fields. If exactly one of this field and nodeConfig.location is
specified, the location information from the specified field will be
propagated to the unspecified field. The machineTypeId must not be a
[shared-core machine type](/compute/docs/machine-types#sharedcore). If
this field is unspecified, the machineTypeId defaults to
"n1-standard-1". This field is supported for Cloud Composer environments
in versions composer-1..-airflow-..*.
Optional.
Implementation
core.String? machineType;