machineType

Machine Type of the worker, such as n1-standard-1. See https://cloud.google.com/compute/docs/machine-types. If left blank, Cloud Build will use a standard unspecified machine to create the worker pool. machine_type is overridden if you specify a different machine type in build_options. In this case, the VM specified in the build_options will be created on demand at build time. For more information see https://cloud.google.com/cloud-build/docs/speeding-up-builds#using_custom_virtual_machine_sizes