python-docs-samples/compute/api/create_instance.py at master · kbanggithub/python-docs-samples · GitHub

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#!/usr/bin/env python

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Example of using the Compute Engine API to create and delete instances.

Creates a new compute engine instance and uses it to apply a caption to

an image.

https://cloud.google.com/compute/docs/tutorials/python-guide

For more information, see the README.md under /compute.

"""

import argparse

import os

import time

from googleapiclient import discovery

from oauth2client.client import GoogleCredentials

from six.moves import input

# [START list_instances]

def list_instances(compute, project, zone):

result = compute.instances().list(project=project, zone=zone).execute()

return result['items']

# [END list_instances]

# [START create_instance]

def create_instance(compute, project, zone, name, bucket):

source_disk_image = \

"projects/debian-cloud/global/images/debian-7-wheezy-v20150320"

machine_type = "zones/%s/machineTypes/n1-standard-1" % zone

startup_script = open(

os.path.join(

os.path.dirname(__file__), 'startup-script.sh'), 'r').read()

image_url = "http://storage.googleapis.com/gce-demo-input/photo.jpg"

image_caption = "Ready for dessert?"

config = {

'name': name,

'machineType': machine_type,

# Specify the boot disk and the image to use as a source.

'disks': [

{

'boot': True,

'autoDelete': True,

'initializeParams': {

'sourceImage': source_disk_image,

}

# Specify a network interface with NAT to access the public

# internet.

'networkInterfaces': [{

'network': 'global/networks/default',

'accessConfigs': [

{'type': 'ONE_TO_ONE_NAT', 'name': 'External NAT'}

]

}],

# Allow the instance to access cloud storage and logging.

'serviceAccounts': [{

'email': 'default',

'scopes': [

'https://www.googleapis.com/auth/devstorage.read_write',

'https://www.googleapis.com/auth/logging.write'

]

}],

# Metadata is readable from the instance and allows you to

# pass configuration from deployment scripts to instances.

'metadata': {

'items': [{

# Startup script is automatically executed by the

# instance upon startup.

'key': 'startup-script',

'value': startup_script

}, {

'key': 'url',

'value': image_url

}, {

'key': 'text',

'value': image_caption

}, {

'key': 'bucket',

'value': bucket

}]

}

return compute.instances().insert(

project=project,

zone=zone,

body=config).execute()

# [END create_instance]

# [START delete_instance]

def delete_instance(compute, project, zone, name):

return compute.instances().delete(

project=project,

zone=zone,

instance=name).execute()

# [END delete_instance]

# [START wait_for_operation]

def wait_for_operation(compute, project, zone, operation):

print('Waiting for operation to finish...')

while True:

result = compute.zoneOperations().get(

project=project,

zone=zone,

operation=operation).execute()

if result['status'] == 'DONE':

print("done.")

if 'error' in result:

raise Exception(result['error'])

return result

time.sleep(1)

# [END wait_for_operation]

# [START run]

def main(project, bucket, zone, instance_name, wait=True):

credentials = GoogleCredentials.get_application_default()

compute = discovery.build('compute', 'v1', credentials=credentials)

print('Creating instance.')

operation = create_instance(compute, project, zone, instance_name, bucket)

wait_for_operation(compute, project, zone, operation['name'])

instances = list_instances(compute, project, zone)

print('Instances in project %s and zone %s:' % (project, zone))

for instance in instances:

print(' - ' + instance['name'])

print("""

Instance created.

It will take a minute or two for the instance to complete work.

Check this URL: http://storage.googleapis.com/{}/output.png

Once the image is uploaded press enter to delete the instance.

""".format(bucket))

if wait:

input()

print('Deleting instance.')

operation = delete_instance(compute, project, zone, instance_name)

wait_for_operation(compute, project, zone, operation['name'])

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter)

parser.add_argument('project_id', help='Your Google Cloud project ID.')

parser.add_argument(

'bucket_name', help='Your Google Cloud Storage bucket name.')

parser.add_argument(

'--zone',

default='us-central1-f',

help='Compute Engine zone to deploy to.')

parser.add_argument(

'--name', default='demo-instance', help='New instance name.')

args = parser.parse_args()

main(args.project_id, args.bucket_name, args.zone, args.name)

# [END run]

python-docs-samples/compute/api/create_instance.py at master · kbanggithub/python-docs-samples · GitHub

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