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gcloud compute instances set-machine-type

NAME
gcloud compute instances set-machine-type - set machine type for Compute Engine virtual machines
SYNOPSIS
gcloud compute instances set-machine-type INSTANCE_NAME [--machine-type=MACHINE_TYPE] [--zone=ZONE] [--custom-cpu=CUSTOM_CPU --custom-memory=CUSTOM_MEMORY : --custom-extensions --custom-vm-type=CUSTOM_VM_TYPE] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
gcloud compute instances set-machine-type lets you change the machine type of a virtual machine in the TERMINATED state (that is, a virtual machine instance that has been stopped).

For example, if example-instance is a g1-small virtual machine currently in the TERMINATED state, running: 

gcloud compute instances set-machine-type example-instance --zone us-central1-b --machine-type n1-standard-4

will change the machine type to n1-standard-4, so that when you next start example-instance, it will be provisioned as an n1-standard-4 instead of a g1-small.

See https://cloud.google.com/compute/docs/machine-types for more information on machine types.
EXAMPLES
To change the machine type of a VM to n1-standard-4, run: 
gcloud compute instances set-machine-type example-instance --zone=us-central1-b --machine-type=n1-standard-4
POSITIONAL ARGUMENTS
INSTANCE_NAME
Name of the instance to operate on. For details on valid instance names, refer to the criteria documented under the field 'name' at: https://cloud.google.com/compute/docs/reference/rest/v1/instances
FLAGS
--machine-type=MACHINE_TYPE
Specifies the machine type used for the instances. To get a list of available machine types, run 'gcloud compute machine-types list'. Either this flag, --custom-cpu, or --custom-memory must be specified.
--zone=ZONE
Zone of the instance to operate on. If not specified, you might be prompted to select a zone (interactive mode only). gcloud attempts to identify the appropriate zone by searching for resources in your currently active project. If the zone cannot be determined, gcloud prompts you for a selection with all available Google Cloud Platform zones.

To avoid prompting when this flag is omitted, the user can set the compute/zone property: 

gcloud config set compute/zone ZONE

A list of zones can be fetched by running: 

gcloud compute zones list

To unset the property, run: 

gcloud config unset compute/zone
 Alternatively, the zone can be stored in the environment variable CLOUDSDK_COMPUTE_ZONE. Custom machine type extensions.
--custom-cpu=CUSTOM_CPU
A whole number value specifying the number of cores that are needed in the custom machine type.

For some machine types, shared-core values can also be used. For example, for E2 machine types, you can specify micro, small, or medium.

This flag argument must be specified if any of the other arguments in this group are specified.
--custom-memory=CUSTOM_MEMORY
A whole number value indicating how much memory is desired in the custom machine type. A size unit should be provided (eg. 3072MB or 9GB) - if no units are specified, GB is assumed. This flag argument must be specified if any of the other arguments in this group are specified.
--custom-extensions
Use the extended custom machine type.
--custom-vm-type=CUSTOM_VM_TYPE
Specifies a custom machine type. The default is n1. For more information about custom machine types, see: https://cloud.google.com/compute/docs/general-purpose-machines#custom_machine_types
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
These variants are also available: 
gcloud alpha compute instances set-machine-type
 
gcloud beta compute instances set-machine-type
 
gcloud preview compute instances set-machine-type