gistfile1.py

def _safe_context_region(region=None, context=None):
    """Value to use when no region is specified."""
    context = context or identity
    ret = region or settings.get("region")
    if not ret:
        # Nothing specified; get the default from the identity object.
        ret = context.get_default_region()
    if not ret:
        # Use the first available region
        try:
            ret = regions[0]
        except IndexError:
            ret = ""
    return ret
    


def connect_to_cloudservers(region=None, context=None, **kwargs):
    """Creates a client for working with cloud servers."""
    if context:
        auth_plugin = context
        region = _safe_context_region(region=region, context=context)
        id_type = None
    else:
        _cs_auth_plugin.discover_auth_systems()
        id_type = get_setting("identity_type")
        if id_type != "keystone":
            auth_plugin = _cs_auth_plugin.load_plugin(id_type)
        else:
            auth_plugin = None
        region = _safe_region(region=region)
    context = context or identity
    mgt_url = _get_service_endpoint(context, "compute", region)
    cloudservers = None
    if not mgt_url:
        # Service is not available
        return
    insecure = not get_setting("verify_ssl")
    cloudservers = _cs_client.Client(context.username, context.password,
            project_id=context.tenant_id, auth_url=context.auth_endpoint,
            auth_system=id_type, region_name=region, service_type="compute",
            auth_plugin=auth_plugin, insecure=insecure,
            http_log_debug=_http_debug, **kwargs)
    agt = cloudservers.client.USER_AGENT
    cloudservers.client.USER_AGENT = _make_agent_name(agt)
    cloudservers.client.management_url = mgt_url
    cloudservers.client.auth_token = context.token
    cloudservers.exceptions = _cs_exceptions
    # Add some convenience methods
    cloudservers.list_images = cloudservers.images.list
    cloudservers.list_flavors = cloudservers.flavors.list
    cloudservers.list = cloudservers.servers.list
    
    ...