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