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