sfa/rspecs/pg_rspec.py

   1 #!/usr/bin/python
   2 from lxml import etree
   3 from StringIO import StringIO
   4 from sfa.rspecs.rspec import RSpec
   5 from sfa.util.xrn import *
   6 from sfa.util.plxrn import hostname_to_urn
   7 from sfa.util.config import Config
   8 from sfa.rspecs.rspec_version import RSpecVersion
   9
  10 _ad_version = {'type':  'ProtoGENI',
  11             'version': '2',
  12             'schema': 'http://www.protogeni.net/resources/rspec/2/ad.xsd',
  13             'namespace': 'http://www.protogeni.net/resources/rspec/2',
  14             'extensions':  [
  15                 'http://www.protogeni.net/resources/rspec/ext/gre-tunnel/1',
  16                 'http://www.protogeni.net/resources/rspec/ext/other-ext/3'
  17             ]
  18 }
  19
  20 _request_version = {'type':  'ProtoGENI',
  21             'version': '2',
  22             'schema': 'http://www.protogeni.net/resources/rspec/2/request.xsd',
  23             'namespace': 'http://www.protogeni.net/resources/rspec/2',
  24             'extensions':  [
  25                 'http://www.protogeni.net/resources/rspec/ext/gre-tunnel/1',
  26                 'http://www.protogeni.net/resources/rspec/ext/other-ext/3'
  27             ]
  28 }
  29 pg_rspec_ad_version = RSpecVersion(_ad_version)
  30 pg_rspec_request_version = RSpecVersion(_request_version)
  31
  32 class PGRSpec(RSpec):
  33     xml = None
  34     header = '<?xml version="1.0"?>\n'
  35     template = """<rspec xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.protogeni.net/resources/rspec/2" xsi:schemaLocation="http://www.protogeni.net/resources/rspec/2 http://www.protogeni.net/resources/rspec/2/%(rspec_type)s.xsd"></rspec>"""
  36
  37     def __init__(self, rspec="", namespaces={}, type=None):
  38         if not type:
  39             type = 'advertisement'
  40         self.type = type
  41
  42         if type == 'advertisement':
  43             self.version = pg_rspec_ad_version
  44             rspec_type = 'ad'
  45         else:
  46             self.version = pg_rspec_request_version
  47             rspec_type = type
  48
  49         self.template = self.template % {'rspec_type': rspec_type}
  50
  51         if not namespaces:
  52             self.namespaces = {'rspecv2': self.version['namespace']}
  53         else:
  54             self.namespaces = namespaces
  55
  56         if rspec:
  57             self.parse_rspec(rspec, self.namespaces)
  58         else:
  59             self.create()
  60
  61     def create(self):
  62         RSpec.create(self)
  63         if self.type:
  64             self.xml.set('type', self.type)
  65
  66     def remove_element(self, element_name, root_node=None):
  67         if not element_name.startswith('rspecv2:'):
  68             element_name = 'rspecv2:' + element_name
  69         RSpec.remove_element(self, element_name, root_node)
  70
  71     def get_network(self):
  72         network = None
  73         nodes = self.xml.xpath('//rspecv2:node[@component_manager_uuid][1]', namespaces=self.namespaces)
  74         if nodes:
  75             network  = nodes[0].get('component_manager_uuid')
  76         return network
  77
  78     def get_networks(self):
  79         networks = self.xml.xpath('//rspecv2:node[@component_manager_uuid]/@component_manager_uuid', namespaces=self.namespaces)
  80         return set(networks)
  81
  82     def get_node_elements(self):
  83         nodes = self.xml.xpath('//rspecv2:node', namespaces=self.namespaces)
  84         return nodes
  85
  86     def get_nodes(self, network=None):
  87         return self.xml.xpath('//rspecv2:node[@component_name]/@component_name', namespaces=self.namespaces)
  88
  89     def get_nodes_with_slivers(self, network=None):
  90         if network:
  91             return self.xml.xpath('//rspecv2:node[@component_manager_id="%s"][sliver_type]/@component_name' % network, namespaces=self.namespaces)
  92         else:
  93             return self.xml.xpath('//rspecv2:node[rspecv2:sliver_type]/@component_name', namespaces=self.namespaces)
  94
  95     def get_nodes_without_slivers(self, network=None):
  96         pass
  97
  98     def add_nodes(self, nodes, check_for_dupes=False):
  99         if not isinstance(nodes, list):
 100             nodes = [nodes]
 101         for node in nodes:
 102             urn = ""
 103             if check_for_dupes and \
 104               self.xml.xpath('//rspecv2:node[@component_uuid="%s"]' % urn, namespaces=self.namespaces):
 105                 # node already exists
 106                 continue
 107
 108             node_tag = etree.SubElement(self.xml, 'node', exclusive='false')
 109             if 'network_urn' in node:
 110                 node_tag.set('component_manager_id', node['network_urn'])
 111             if 'urn' in node:
 112                 node_tag.set('component_id', node['urn'])
 113             if 'hostname' in node:
 114                 node_tag.set('component_name', node['hostname'])
 115             # TODO: should replace plab-pc with pc model
 116             node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='plab-pc')
 117             node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='pc')
 118             available_tag = etree.SubElement(node_tag, 'available', now='true')
 119             location_tag = etree.SubElement(node_tag, 'location', country="us")
 120             if 'site' in node:
 121                 if 'longitude' in node['site']:
 122                     location_tag.set('longitude', str(node['site']['longitude']))
 123                 if 'latitude' in node['site']:
 124                     location_tag.set('latitude', str(node['site']['latitude']))
 125             #if 'interfaces' in node:
 126
 127
 128     def add_slivers(self, slivers, sliver_urn=None, no_dupes=False):
 129         if not isinstance(slivers, list):
 130             slivers = [slivers]
 131
 132         nodes_with_slivers = self.get_nodes_with_slivers()
 133         for sliver in slivers:
 134             hostname = sliver['hostname']
 135             if hostname in nodes_with_slivers:
 136                 continue
 137             nodes = self.xml.xpath('//rspecv2:node[@component_name="%s"] | //node[@component_name="%s"]' % (hostname, hostname), namespaces=self.namespaces)
 138             if nodes:
 139                 node = nodes[0]
 140                 node.set('client_id', hostname)
 141                 if sliver_urn:
 142                     node.set('sliver_id', sliver_urn)
 143                 etree.SubElement(node, 'sliver_type', name='plab-vnode')
 144
 145     def add_interfaces(self, interfaces, no_dupes=False):
 146         pass
 147
 148     def add_links(self, links, no_dupes=False):
 149         pass
 150
 151
 152     def merge(self, in_rspec):
 153         """
 154         Merge contents for specified rspec with current rspec
 155         """
 156
 157         # just copy over all the child elements under the root element
 158         tree = etree.parse(StringIO(in_rspec))
 159         root = tree.getroot()
 160         for child in root.getchildren():
 161             self.xml.append(child)
 162
 163
 164
 165 if __name__ == '__main__':
 166     rspec = PGRSpec()
 167     rspec.add_nodes([1])
 168     print rspec