def create_instance()

in backend/bms_app/services/gce.py [0:0]

• 54 lines of code
• 5 McCabe index (conditional complexity)

def create_instance(project, zone, name, vpc, subnet,
                    service_account, machine_type, startup_script=None):
    # Get the latest bms-control-node image.
    compute = discovery.build('compute', 'v1')
    image_response = compute.images().getFromFamily(
        project='centos-cloud', family='centos-7').execute()
    source_disk_image = image_response['selfLink']

    # Configure the machine
    full_machine_type = f'zones/{zone}/machineTypes/{machine_type}'

    config = {
        'name': name,
        'machineType': full_machine_type,

        # Specify the boot disk and the image to use as a source.
        'disks': [
            {
                'boot': True,
                'autoDelete': True,
                'initializeParams': {
                    'sourceImage': source_disk_image,
                }
            }
        ],

        'networkInterfaces': [{
            'network': vpc,
            'subnetwork': subnet,
            'accessConfigs': [
                {'type': 'ONE_TO_ONE_NAT', 'name': 'External NAT'}
            ]
        }],

        # Allow the instance to access cloud storage and logging.
        'serviceAccounts': [{
            'email': service_account,
            'scopes': [
                "https://www.googleapis.com/auth/devstorage.read_only",
                "https://www.googleapis.com/auth/logging.write",
                "https://www.googleapis.com/auth/monitoring.write",
                "https://www.googleapis.com/auth/servicecontrol",
                "https://www.googleapis.com/auth/service.management.readonly",
                "https://www.googleapis.com/auth/trace.append",
                "https://www.googleapis.com/auth/cloud-platform",
            ]
        }],

        # Metadata is readable from the instance and allows you to
        # pass configuration from deployment scripts to instances.
        'metadata': {
            'items': []
        }
    }

    if startup_script:
        config['metadata']['items'].append(
            {
                'key': 'startup-script',
                'value': startup_script
            }
        )

    return compute.instances().insert(
        project=project,
        zone=zone,
        body=config
    ).execute()