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"/>'
  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 get_network(self):
  67         network = None
  68         nodes = self.xml.xpath('//rspecv2:node[@component_manager_uuid][1]', namespaces=self.namespaces)
  69         if nodes:
  70             network  = nodes[0].get('component_manager_uuid')
  71         return network
  72
  73     def get_networks(self):
  74         networks = self.xml.xpath('//rspecv2:node[@component_manager_uuid]/@component_manager_uuid', namespaces=self.namespaces)
  75         return set(networks)
  76
  77     def get_node_elements(self):
  78         nodes = self.xml.xpath('//rspecv2:node | //node', namespaces=self.namespaces)
  79         return nodes
  80
  81     def get_nodes(self, network=None):
  82         xpath = '//rspecv2:node[@component_name]/@component_name | //node[@component_name]/@component_name'
  83         return self.xml.xpath(xpath, namespaces=self.namespaces)
  84
  85     def get_nodes_with_slivers(self, network=None):
  86         if network:
  87             return self.xml.xpath('//rspecv2:node[@component_manager_id="%s"][sliver_type]/@component_name' % network, namespaces=self.namespaces)
  88         else:
  89             return self.xml.xpath('//rspecv2:node[rspecv2:sliver_type]/@component_name', namespaces=self.namespaces)
  90
  91     def get_nodes_without_slivers(self, network=None):
  92         pass
  93
  94     def get_slice_attributes(self, network=None):
  95         pass
  96
  97     def get_default_sliver_attributes(self, network=None):
  98         pass
  99
 100     def add_default_sliver_attribute(self, name, value, network=None):
 101         pass
 102
 103     def add_nodes(self, nodes, check_for_dupes=False):
 104         if not isinstance(nodes, list):
 105             nodes = [nodes]
 106         for node in nodes:
 107             urn = ""
 108             if check_for_dupes and \
 109               self.xml.xpath('//rspecv2:node[@component_uuid="%s"]' % urn, namespaces=self.namespaces):
 110                 # node already exists
 111                 continue
 112
 113             node_tag = etree.SubElement(self.xml, 'node', exclusive='false')
 114             if 'network_urn' in node:
 115                 node_tag.set('component_manager_id', node['network_urn'])
 116             if 'urn' in node:
 117                 node_tag.set('component_id', node['urn'])
 118             if 'hostname' in node:
 119                 node_tag.set('component_name', node['hostname'])
 120             # TODO: should replace plab-pc with pc model
 121             node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='plab-pc')
 122             node_type_tag = etree.SubElement(node_tag, 'hardware_type', name='pc')
 123             available_tag = etree.SubElement(node_tag, 'available', now='true')
 124             location_tag = etree.SubElement(node_tag, 'location', country="us")
 125             if 'site' in node:
 126                 if 'longitude' in node['site']:
 127                     location_tag.set('longitude', str(node['site']['longitude']))
 128                 if 'latitude' in node['site']:
 129                     location_tag.set('latitude', str(node['site']['latitude']))
 130             #if 'interfaces' in node:
 131
 132
 133     def add_slivers(self, slivers, sliver_urn=None, no_dupes=False):
 134         slivers = self._process_slivers(slivers)
 135         nodes_with_slivers = self.get_nodes_with_slivers()
 136         for sliver in slivers:
 137             hostname = sliver['hostname']
 138             if hostname in nodes_with_slivers:
 139                 continue
 140             nodes = self.xml.xpath('//rspecv2:node[@component_name="%s"] | //node[@component_name="%s"]' % (hostname, hostname), namespaces=self.namespaces)
 141             if nodes:
 142                 node = nodes[0]
 143                 node.set('client_id', hostname)
 144                 if sliver_urn:
 145                     node.set('sliver_id', sliver_urn)
 146                 etree.SubElement(node, 'sliver_type', name='plab-vnode')
 147
 148     def add_default_sliver_attribute(self, name, value, network=None):
 149         pass
 150
 151     def add_interfaces(self, interfaces, no_dupes=False):
 152         pass
 153
 154     def add_links(self, links, no_dupes=False):
 155         pass
 156
 157
 158     def merge(self, in_rspec):
 159         """
 160         Merge contents for specified rspec with current rspec
 161         """
 162
 163         # just copy over all the child elements under the root element
 164         tree = etree.parse(StringIO(in_rspec))
 165         root = tree.getroot()
 166         for child in root.getchildren():
 167             self.xml.append(child)
 168
 169     def cleanup(self):
 170         # remove unncecessary elements, attributes
 171         if self.type in ['request', 'manifest']:
 172             # remove nodes without slivers
 173             nodes = self.get_node_elements()
 174             for node in nodes:
 175                 delete = True
 176                 hostname = node.get('component_name')
 177                 parent = node.getparent()
 178                 children = node.getchildren()
 179                 for child in children:
 180                     if child.tag.endswith('sliver_type'):
 181                         delete = False
 182                 if delete:
 183                     parent.remove(node)
 184
 185             # remove 'available' element from remaining node elements
 186             self.remove_element('//rspecv2:available | //available')
 187
 188 if __name__ == '__main__':
 189     rspec = PGRSpec()
 190     rspec.add_nodes([1])
 191     print rspec