title: Compute -> Examples

## Examples

* [Create an OpenStack node using trystack.org provider](#example-1-openstack-node-using-trystack)
* [Create a VMware vCloud v1.5 node using generic provider](#example-2-vcloud-generic-provider)

<h3 id="example-1-openstack-node-using-trystack">Create an OpenStack node using trystack.org provider</h3>

<p><a href="https://trystack.org/">trystack.org</a> allows users to try out OpenStack for free.
This example demonstrates how to launch an OpenStack node on the trystack.org provider using a generic
OpenStack driver.</p>

<p>Note: This example works with Libcloud 0.9.0 and above.</p>

    ::python
    from libcloud.compute.types import Provider
    from libcloud.compute.providers import get_driver

    import libcloud.security

    # At the time this example was written, https://nova-api.trystack.org:5443
    # was using a certificate issued by a Certificate Authority (CA)
    # which is not included in the default Ubuntu certificates bundle (ca-certificates).
    # Note: Code like this poses a security risk (MITM attack) and
    # that's the reason why you should never use it for anything else
    # besides testing. You have been warned.
    libcloud.security.VERIFY_SSL_CERT = False

    OpenStack = get_driver(Provider.OPENSTACK)

    driver = OpenStack('your username', 'your password',
                       ex_force_auth_url='https://nova-api.trystack.org:5443/v2.0',
                       ex_force_auth_version='2.0_password')

    nodes = driver.list_nodes()

    images = driver.list_images()
    sizes = driver.list_sizes()
    size = [s for s in sizes if s.ram == 512][0]
    image = [i for i in images if i.name == 'natty-server-cloudimg-amd64'][0]

    node = driver.create_node(name='test node', image=image, size=size)


<h3 id="example-2-vcloud-generic-provider">Create a VMware vCloud v1.5 node using generic provider</h3>

<p>This example demonstrates how to launch a VMware vCloud v1.5 node on a generic provider such as a test lab.</p>

<p>Note: This example works with Libcloud version 0.10.1 and above.</p>

    ::python
    from libcloud.compute.types import Provider
    from libcloud.compute.providers import get_driver

    import libcloud.security

	# Skip this step if you are launching nodes on an official vCloud
	# provider. It is intended only for self signed SSL certs in 
	# vanilla vCloud Director v1.5 test deployments.
    # Note: Code like this poses a security risk (MITM attack) and
    # that's the reason why you should never use it for anything else
    # besides testing. You have been warned.
    libcloud.security.VERIFY_SSL_CERT = False

    vcloud = get_driver(Provider.VCLOUD)

    driver = vcloud('you username@organisation', 'your password',
                    host='vcloud.local', api_version='1.5')

    # List all instantiated vApps
    nodes = driver.list_nodes()
    # List all VMs within the first vApp instance
    print nodes[0].extra['vms']

    # List all available vApp Templates
    images = driver.list_images()
    image = [i for i in images if i.name == 'natty-server-cloudimg-amd64'][0]

	# Create node with minimum set of parameters
    node = driver.create_node(name='test node 1', image=image)
    # Destroy the node
    driver.destroy_node(node)

    # Create node without deploying and powering it on
    node = driver.create_node(name='test node 2', image=image, ex_deploy=False)

    # Create node with custom CPU & Memory values
    node = driver.create_node(name='test node 3', image=image, ex_vm_cpu=3, ex_vm_memory=1024)

    # Create node with customised networking parameters (eg. for OVF imported images)
    node = driver.create_node(name='test node 4', image=image,
                              ex_vm_network='your vm net name', ex_network='your org net name',
                              ex_vm_fence='bridged', ex_vm_ipmode='DHCP')

    # Create node in a custom virtual data center
    node = driver.create_node(name='test node 4', image=image, ex_vdc='your vdc name')

    # Create node with guest OS customisation script to be run at first boot
    node = driver.create_node(name='test node 5', image=image,
                              ex_vm_script='filesystem path to your script')