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         self.type = type
  39         if not type or type == 'advertisement':
  40             self.version = pg_rspec_ad_version
  41             rspec_type = 'ad'
  42         else:
  43             self.version = pg_rspec_request_version
  44             rspec_type == 'request'
  45         self.template = self.template % locals()
  46
  47         if not namespaces:
  48             self.namespaces = {'rspecv2': self.version['namespace']}
  49         else:
  50             self.namespaces = namespaces
  51
  52         if rspec:
  53             self.parse_rspec(rspec, self.namespaces)
  54         else:
  55             self.create()
  56
  57     def create(self):
  58         RSpec.create(self)
  59         if self.type:
  60             self.xml.set('type', self.type)
  61
  62     def get_network(self):
  63         network = None
  64         nodes = self.xml.xpath('//rspecv2:node[@component_manager_uuid][1]', namespaces=self.namespaces)
  65         if nodes:
  66             network  = nodes[0].get('component_manager_uuid')
  67         return network
  68
  69     def get_networks(self):
  70         networks = self.xml.xpath('//rspecv2:node[@component_manager_uuid]/@component_manager_uuid', namespaces=self.namespaces)
  71         return set(networks)
  72
  73     def get_node_elements(self):
  74         nodes = self.xml.xpath('//rspecv2:node', namespaces=self.namespaces)
  75         return nodes
  76
  77     def get_nodes(self, network=None):
  78         return self.xml.xpath('//rspecv2:node[@component_name]/@component_name', namespaces=self.namespaces)
  79
  80     def get_nodes_with_slivers(self, network=None):
  81         if network:
  82             return self.xml.xpath('//rspecv2:node[@component_manager_id="%s"][sliver_type]/@component_name' % network, namespaces=self.namespaces)
  83         else:
  84             return self.xml.xpath('//rspecv2:node[rspecv2:sliver_type]/@component_name', namespaces=self.namespaces)
  85
  86     def get_nodes_without_slivers(self, network=None):
  87         pass
  88
  89     def add_nodes(self, nodes, check_for_dupes=False):
  90         if not isinstance(nodes, list):
  91             nodes = [nodes]
  92         for node in nodes:
  93             urn = ""
  94             if check_for_dupes and \
  95               self.xml.xpath('//rspecv2:node[@component_uuid="%s"]' % urn, namespaces=self.namespaces):
  96                 # node already exists
  97                 continue
  98
  99             node_tag = etree.SubElement(self.xml, 'node')
 100             if 'network_urn' in node:
 101                 node_tag.set('component_manager_id', node['network_urn'])
 102             if 'urn' in node:
 103                 node_tag.set('component_id', node['urn'])
 104             if 'hostname' in node:
 105                 node_tag.set('component_name', node['hostname'])
 106             node_type_tag = etree.SubElement(node_tag, 'node_type', type_name='pcvm', type_slots='100')
 107             available_tag = etree.SubElement(node_tag, 'available').text = 'true'
 108             exclusive_tag = etree.SubElement(node_tag, 'exclusive').text = 'false'
 109             location_tag = etree.SubElement(node_tag, 'location', location="US")
 110             if 'site' in node:
 111                 if 'longitude' in node['site']:
 112                     location_tag.set('longitude', str(node['site']['longitude']))
 113                 if 'latitude' in node['site']:
 114                     location_tag.set('latitude', str(node['site']['latitude']))
 115             #if 'interfaces' in node:
 116
 117
 118     def add_slivers(self, slivers, check_for_dupes=False):
 119         if not isinstance(slivers, list):
 120             slivers = [slivers]
 121
 122         nodes_with_slivers = self.get_nodes_with_slivers()
 123         for sliver in slivers:
 124             hostname = sliver['hostname']
 125             if hostname in nodes_with_slivers:
 126                 continue
 127             nodes = self.xml.xpath('//rspecv2:node[@component_name="%s"] | //node[@component_name="%s"]' % (hostname, hostname), namespaces=self.namespaces)
 128             if nodes:
 129                 node = nodes[0]
 130                 node.set('client_id', hostname)
 131                 etree.SubElement(node, 'sliver_type', name='planetlab-vnode')
 132
 133     def add_interfaces(self, interfaces, check_for_dupes=False):
 134         pass
 135
 136     def add_links(self, links, check_for_dupes=False):
 137         pass
 138
 139
 140     def merge(self, in_rspec):
 141         """
 142         Merge contents for specified rspec with current rspec
 143         """
 144
 145         # just copy over all the child elements under the root element
 146         tree = etree.parse(StringIO(in_rspec))
 147         root = tree.getroot()
 148         for child in root.getchildren():
 149             self.xml.append(child)
 150
 151
 152
 153 if __name__ == '__main__':
 154     rspec = PGRSpec()
 155     rspec.add_nodes([1])
 156     print rspec