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Jonathan Wayne Parrott
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Merge pull request #102 from GoogleCloudPlatform/compute-getting-started
Moving compute engine getting started example to this repository.
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‎compute/api/__init__.py

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‎compute/api/create_instance.py

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#!/usr/bin/env python
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# Copyright 2015 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Example of using the Compute Engine API to create and delete instances.
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Creates a new compute engine instance and uses it to apply a caption to
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an image.
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https://cloud.google.com/bigquery/querying-data#asyncqueries
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For more information, see the README.md under /bigquery.
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"""
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import argparse
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import os
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import time
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from googleapiclient import discovery
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from oauth2client.client import GoogleCredentials
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from six.moves import input
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# [START list_instances]
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def list_instances(compute, project, zone):
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result = compute.instances().list(project=project, zone=zone).execute()
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return result['items']
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# [END list_instances]
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# [START create_instance]
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def create_instance(compute, project, zone, name, bucket):
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source_disk_image = \
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"projects/debian-cloud/global/images/debian-7-wheezy-v20150320"
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machine_type = "zones/%s/machineTypes/n1-standard-1" % zone
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startup_script = open(
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os.path.join(
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os.path.dirname(__file__), 'startup-script.sh'), 'r').read()
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image_url = "http://storage.googleapis.com/gce-demo-input/photo.jpg"
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image_caption = "Ready for dessert?"
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config = {
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'name': name,
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'machineType': machine_type,
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# Specify the boot disk and the image to use as a source.
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'disks': [
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{
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'boot': True,
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'autoDelete': True,
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'initializeParams': {
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'sourceImage': source_disk_image,
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}
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}
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],
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# Specify a network interface with NAT to access the public
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# internet.
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'networkInterfaces': [{
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'network': 'global/networks/default',
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'accessConfigs': [
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{'type': 'ONE_TO_ONE_NAT', 'name': 'External NAT'}
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]
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}],
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# Allow the instance to access cloud storage and logging.
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'serviceAccounts': [{
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'email': 'default',
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'scopes': [
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'https://www.googleapis.com/auth/devstorage.read_write',
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'https://www.googleapis.com/auth/logging.write'
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]
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}],
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# Metadata is readable from the instance and allows you to
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# pass configuration from deployment scripts to instances.
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'metadata': {
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'items': [{
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# Startup script is automatically executed by the
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# instance upon startup.
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'key': 'startup-script',
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'value': startup_script
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}, {
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'key': 'url',
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'value': image_url
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}, {
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'key': 'text',
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'value': image_caption
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}, {
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'key': 'bucket',
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'value': bucket
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}]
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}
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}
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return compute.instances().insert(
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project=project,
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zone=zone,
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body=config).execute()
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# [END create_instance]
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# [START delete_instance]
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def delete_instance(compute, project, zone, name):
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return compute.instances().delete(
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project=project,
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zone=zone,
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instance=name).execute()
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# [END delete_instance]
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# [START wait_for_operation]
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def wait_for_operation(compute, project, zone, operation):
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print('Waiting for operation to finish...')
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while True:
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result = compute.zoneOperations().get(
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project=project,
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zone=zone,
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operation=operation).execute()
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if result['status'] == 'DONE':
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print("done.")
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if 'error' in result:
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raise Exception(result['error'])
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return result
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time.sleep(1)
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# [END wait_for_operation]
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# [START run]
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def main(project, bucket, zone, instance_name, wait=True):
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credentials = GoogleCredentials.get_application_default()
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compute = discovery.build('compute', 'v1', credentials=credentials)
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print('Creating instance.')
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operation = create_instance(compute, project, zone, instance_name, bucket)
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wait_for_operation(compute, project, zone, operation['name'])
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instances = list_instances(compute, project, zone)
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print('Instances in project %s and zone %s:' % (project, zone))
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for instance in instances:
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print(' - ' + instance['name'])
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print("""
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Instance created.
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It will take a minute or two for the instance to complete work.
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Check this URL: http://storage.googleapis.com/{}/output.png
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Once the image is uploaded press enter to delete the instance.
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""".format(bucket))
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if wait:
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input()
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print('Deleting instance.')
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operation = delete_instance(compute, project, zone, instance_name)
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wait_for_operation(compute, project, zone, operation['name'])
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if __name__ == '__main__':
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parser = argparse.ArgumentParser(
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description=__doc__,
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formatter_class=argparse.RawDescriptionHelpFormatter)
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parser.add_argument('project_id', help='Your Google Cloud project ID.')
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parser.add_argument(
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'bucket_name', help='Your Google Cloud Storage bucket name.')
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parser.add_argument(
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'--zone',
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default='us-central1-f',
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help='Compute Engine zone to deploy to.')
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parser.add_argument(
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'--name', default='demo-instance', help='New instance name.')
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args = parser.parse_args()
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main(args.project_id, args.bucket_name, args.zone, args.name)
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# [END run]

‎compute/api/create_instance_test.py

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# Copyright 2015, Google, Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import tests
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from .create_instance import main
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class TestComputeGettingStarted(tests.CloudBaseTest):
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def test_main(self):
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with tests.capture_stdout():
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main(
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self.project_id,
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self.bucket_name,
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'us-central1-f',
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'test-instance',
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wait=False)

‎compute/api/startup-script.sh

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#!/bin/bash
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# Copyright 2015 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START startup_script]
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apt-get update
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apt-get -y install imagemagick
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# Use the metadata server to get the configuration specified during
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# instance creation. Read more about metadata here:
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# https://cloud.google.com/compute/docs/metadata#querying
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IMAGE_URL=$(curl http://metadata/computeMetadata/v1/instance/attributes/url -H "X-Google-Metadata-Request: True")
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TEXT=$(curl http://metadata/computeMetadata/v1/instance/attributes/text -H "X-Google-Metadata-Request: True")
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CS_BUCKET=$(curl http://metadata/computeMetadata/v1/instance/attributes/bucket -H "X-Google-Metadata-Request: True")
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mkdir image-output
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cd image-output
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wget $IMAGE_URL
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convert * -pointsize 30 -fill white -stroke black -gravity center -annotate +10+40 "$TEXT" output.png
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# Create a Google Cloud Storage bucket.
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gsutil mb gs://$CS_BUCKET
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# Store the image in the Google Cloud Storage bucket and allow all users
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# to read it.
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gsutil cp -a public-read output.png gs://$CS_BUCKET/output.png
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# [END startup_script]

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