#!/usr/bin/python
from lxml import etree
from StringIO import StringIO
from sfa.rspecs.rspec import RSpec
from sfa.util.xrn import *
from sfa.util.plxrn import hostname_to_urn, xrn_to_hostname
from sfa.util.config import Config
from sfa.rspecs.rspec_version import RSpecVersion
_ad_version = {'type': 'ProtoGENI',
'version': '2',
'schema': 'http://www.protogeni.net/resources/rspec/2/ad.xsd',
'namespace': 'http://www.protogeni.net/resources/rspec/2',
'extensions': [
'http://www.protogeni.net/resources/rspec/ext/gre-tunnel/1',
'http://www.protogeni.net/resources/rspec/ext/other-ext/3'
]
}
_request_version = {'type': 'ProtoGENI',
'version': '2',
'schema': 'http://www.protogeni.net/resources/rspec/2/request.xsd',
'namespace': 'http://www.protogeni.net/resources/rspec/2',
'extensions': [
'http://www.protogeni.net/resources/rspec/ext/gre-tunnel/1',
'http://www.protogeni.net/resources/rspec/ext/other-ext/3'
]
}
pg_rspec_ad_version = RSpecVersion(_ad_version)
pg_rspec_request_version = RSpecVersion(_request_version)
class PGRSpec(RSpec):
xml = None
header = '\n'
template = ''
def __init__(self, rspec="", namespaces={}, type=None):
if not type:
type = 'advertisement'
self.type = type
if type == 'advertisement':
self.version = pg_rspec_ad_version
rspec_type = 'ad'
else:
self.version = pg_rspec_request_version
rspec_type = type
self.template = self.template % {'rspec_type': rspec_type}
if not namespaces:
self.namespaces = {'rspecv2': self.version['namespace']}
else:
self.namespaces = namespaces
if rspec:
self.parse_rspec(rspec, self.namespaces)
else:
self.create()
def create(self):
RSpec.create(self)
if self.type:
self.xml.set('type', self.type)
def get_network(self):
network = None
nodes = self.xml.xpath('//rspecv2:node[@component_manager_uuid][1]', namespaces=self.namespaces)
if nodes:
network = nodes[0].get('component_manager_uuid')
return network
def get_networks(self):
networks = self.xml.xpath('//rspecv2:node[@component_manager_uuid]/@component_manager_uuid', namespaces=self.namespaces)
return set(networks)
def get_node_elements(self):
nodes = self.xml.xpath('//rspecv2:node | //node', namespaces=self.namespaces)
return nodes
def get_nodes(self, network=None):
xpath = '//rspecv2:node[@component_name]/@component_id | //node[@component_name]/@component_id'
nodes = self.xml.xpath(xpath, namespaces=self.namespaces)
nodes = [xrn_to_hostname(node) for node in nodes]
return nodes
def get_nodes_with_slivers(self, network=None):
if network:
nodes = self.xml.xpath('//rspecv2:node[@component_manager_id="%s"][sliver_type]/@component_id' % network, namespaces=self.namespaces)
else:
nodes = self.xml.xpath('//rspecv2:node[rspecv2:sliver_type]/@component_id', namespaces=self.namespaces)
nodes = [xrn_to_hostname(node) for node in nodes]
return nodes
def get_nodes_without_slivers(self, network=None):
return []
def get_slice_attributes(self, network=None):
return []
def get_default_sliver_attributes(self, network=None):
return []
def add_default_sliver_attribute(self, name, value, network=None):
pass
def add_nodes(self, nodes, check_for_dupes=False):
if not isinstance(nodes, list):
nodes = [nodes]
for node in nodes:
urn = ""
if check_for_dupes and \
self.xml.xpath('//rspecv2:node[@component_uuid="%s"]' % urn, namespaces=self.namespaces):
# node already exists
continue
node_tag = etree.SubElement(self.xml, 'node', exclusive='false')
if 'network_urn' in node:
node_tag.set('component_manager_id', node['network_urn'])
if 'urn' in node:
node_tag.set('component_id', node['urn'])
if 'hostname' in node:
node_tag.set('component_name', node['hostname'])
# TODO: should replace plab-pc with pc model
node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='plab-pc')
node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='pc')
available_tag = etree.SubElement(node_tag, 'available', now='true')
sliver_type_tag = etree.SubElement(node_tag, 'sliver_type', name='plab-vnode')
# protogeni uses the tag to identify the types of
# vms available at the node.
# only add location tag if longitude and latitude are not null
if 'site' in node:
longitude = node['site'].get('longitude', None)
latitude = node['site'].get('latitude', None)
if longitude and latitude:
location_tag = etree.SubElement(node_tag, 'location', country="us", \
longitude=str(longitude), latitude=str(latitude))
def add_slivers(self, slivers, sliver_urn=None, no_dupes=False):
# all nodes hould already be present in the rspec. Remove all
# nodes that done have slivers
slivers = self._process_slivers(slivers)
sliver_hosts = [sliver['hostname'] for sliver in slivers]
nodes = self.get_node_elements()
for node in nodes:
urn = node.get('component_id')
hostname = xrn_to_hostname(urn)
if hostname not in sliver_hosts:
parent = node.getparent()
parent.remove(node)
else:
node.set('client_id', hostname)
if sliver_urn:
node.set('sliver_id', sliver_urn)
def add_default_sliver_attribute(self, name, value, network=None):
pass
def add_interfaces(self, interfaces, no_dupes=False):
pass
def add_links(self, links, no_dupes=False):
pass
def merge(self, in_rspec):
"""
Merge contents for specified rspec with current rspec
"""
# just copy over all the child elements under the root element
tree = etree.parse(StringIO(in_rspec))
root = tree.getroot()
for child in root.getchildren():
self.xml.append(child)
def cleanup(self):
# remove unncecessary elements, attributes
if self.type in ['request', 'manifest']:
# remove 'available' element from remaining node elements
self.remove_element('//rspecv2:available | //available')
if __name__ == '__main__':
rspec = PGRSpec()
rspec.add_nodes([1])
print rspec