def post(self):
#get data from form.
lab_name = self.request.get('lab-name')
project_id = self.request.get('project-id')
lab_zone = self.request.get('lab-zone')
instance_image = self.request.get('instance-image')
machine_type = self.request.get('machine-type')
number_students = int(self.request.get('total-students'))
#get credentials stored in datastore
user_id = users.get_current_user().user_id()
credentials = oauth2client.StorageByKeyName(
oauth2client.CredentialsModel, user_id, 'credentials').get()
#configure project object
gce_project = gce.GceProject(credentials, project_id=project_id, zone_name=lab_zone)
#create lab entity in datastore
lab = Lab(name=lab_name,
project_id=project_id,
lab_zone=lab_zone,
machine_type=machine_type,
instance_image=instance_image)
lab.put()
#create instance objects
instances = []
for n in range(number_students):
# set the username to the name of the instance
username = '******' % (lab_name, n)
pass_phrase = security.generate_random_string(length=8)
if not memcache.add(username, pass_phrase):
logging.error('Failed to set memcache')
metadata_items = [
{
'key': 'user',
'value': username
},
{
'key': 'pass',
'value': pass_phrase
},
{
'key': 'startup-script-url',
'value': 'gs://startup-scripts-compute/startup.sh'
}
]
instance = Instance(name="%s-%s" % (lab_name, n),
lab=lab.key,
metadata=metadata_items,
desired_state="RUNNING",
request_timestamp=datetime.now())
instance.put()
instances.append(instance)
start_instances(gce_project, lab, instances)
self.redirect('/lab/%s' % lab.key.id())
