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Create, use and destroy temporary slaves in the cloud

Project description

I have a number of different applications that need to fire up instances in the cloud to do various things. This module is supposed to be generically useful for that purpose.

What is it?

It’s an incredibly simple way to fire up instances in the cloud with very little effort. It fires up instances of a predefined flavor based on a predefined image.

What is it not?

A generic wrapper around the various OpenStack client libraries. It does one thing and does it well.

How to use it?

First, you configure a cloud:

>>> from cloudslave.models import Cloud
>>> cloud = Cloud(user_name='user_name',
                  tenant_name='tenant_name',
                  password='v3rysecret',
                  endpoint='http://auth/url/v2.0',
                  region='XX-YY', # <-- Optional
                  flavor_name = 'm1.small',
                  image_name = 'regex that matches the name of the image (first match will be used)')
>>> cloud.slave()

Then create a reservation:

>>> res = cloud.create_reservation(5)  # Starts 5 instances
>>> res.start()
>>> res.update_state()
1
>>> res.get_state_display()
'Booting'
>>> res.update_state()
2
>>> res.get_state_display()
'Ready'
>>> [slave.run_cmd('hostname').strip() for slave in res.slave_set.all()]
['cloudslave-nthdnsrn', 'cloudslave-blhhmncq', 'cloudslave-vygfls4t']

Lovely.

Once you’re done with them, terminate the reservation:

>>> res.terminate()

That’s it.

Project details


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