sfa/rspecs/elements/versions/slabv1Node.py

   1 from sfa.planetlab.plxrn import xrn_to_hostname
   2 from sfa.util.xrn import Xrn
   3 from sfa.util.xml import XpathFilter
   4 from sfa.rspecs.elements.node import Node
   5 from sfa.rspecs.elements.sliver import Sliver
   6 from sfa.rspecs.elements.location import Location
   7 from sfa.rspecs.elements.hardware_type import HardwareType
   8
   9 from sfa.rspecs.elements.interface import Interface
  10
  11 from sfa.rspecs.elements.versions.slabv1Sliver import Slabv1Sliver
  12 from sfa.util.sfalogging import logger
  13
  14
  15 class Slabv1Node:
  16     @staticmethod
  17     def add_nodes(xml, nodes):
  18         #Add network item in the xml
  19         network_elems = xml.xpath('//network')
  20         if len(network_elems) > 0:
  21             network_elem = network_elems[0]
  22         elif len(nodes) > 0 and nodes[0].get('component_manager_id'):
  23             network_urn = nodes[0]['component_manager_id']
  24             network_elem = xml.add_element('network', name = Xrn(network_urn).get_hrn())
  25         else:
  26             network_elem = xml
  27
  28         logger.debug("slabv1Node \t add_nodes")
  29         node_elems = []
  30         #Then add nodes items to the network item in the xml
  31         for node in nodes:
  32             node_fields = ['component_manager_id', 'component_id', \
  33                         'client_id', 'sliver_id', 'exclusive','boot_state']
  34             node_elem = network_elem.add_instance('node', node, node_fields)
  35             node_elems.append(node_elem)
  36             # set component name
  37             if node.get('component_id'):
  38                 component_name = xrn_to_hostname(node['component_id'])
  39                 node_elem.set('component_name', component_name)
  40             # set hardware types
  41             if node.get('hardware_types'):
  42                 for hardware_type in node.get('hardware_types', []):
  43                     node_elem.add_instance('hardware_type', hardware_type, \
  44                                                     HardwareType.fields)
  45             # set location
  46             if node.get('location'):
  47                 node_elem.add_instance('location', node['location'], \
  48                                                         Location.fields)
  49              # add granularity of the reservation system
  50             granularity = node.get('granularity')
  51             if granularity:
  52                 node_elem.add_instance('granularity', granularity, granularity.fields)
  53
  54             # set interfaces
  55             #if node.get('interfaces'):
  56                 #for interface in  node.get('interfaces', []):
  57                     #node_elem.add_instance('interface', interface, ['component_id', 'client_id'])
  58             # set available element
  59             if node.get('boot_state'):
  60                 if node.get('boot_state').lower() == 'alive':
  61                     available_elem = node_elem.add_element('available', \
  62                                                                     now='true')
  63                 else:
  64                     available_elem = node_elem.add_element('available', \
  65                                                                 now='false')
  66
  67             ## add services
  68             #PGv2Services.add_services(node_elem, node.get('services', []))
  69             # add slivers
  70             slivers = node.get('slivers', [])
  71             if not slivers:
  72                 # we must still advertise the available sliver types
  73                 slivers = Sliver({'type': 'slab-node'})
  74                 # we must also advertise the available initscripts
  75                 slivers['tags'] = []
  76                 if node.get('pl_initscripts'):
  77                     for initscript in node.get('pl_initscripts', []):
  78                         slivers['tags'].append({'name': 'initscript', \
  79                                                 'value': initscript['name']})
  80
  81             Slabv1Sliver.add_slivers(node_elem, slivers)
  82         return node_elems
  83
  84     @staticmethod
  85     def get_nodes(xml, filter={}):
  86         xpath = '//node%s | //default:node%s' % (XpathFilter.xpath(filter), \
  87                                                     XpathFilter.xpath(filter))
  88         node_elems = xml.xpath(xpath)
  89         logger.debug("SLABV1NODE  \tget_nodes \tnode_elems %s"%(node_elems))
  90         return Slabv1Node.get_node_objs(node_elems)
  91
  92     @staticmethod
  93     def get_nodes_with_slivers(xml, sliver_filter={}):
  94
  95         xpath = '//node[count(sliver)>0] | \
  96                                 //default:node[count(default:sliver) > 0]'
  97         node_elems = xml.xpath(xpath)
  98         logger.debug("SLABV1NODE \tget_nodes_with_slivers  \
  99                                 node_elems %s"%(node_elems))
 100         return Slabv1Node.get_node_objs(node_elems)
 101
 102     @staticmethod
 103     def get_node_objs(node_elems):
 104         nodes = []
 105         for node_elem in node_elems:
 106             node = Node(node_elem.attrib, node_elem)
 107             nodes.append(node)
 108             if 'component_id' in node_elem.attrib:
 109                 node['authority_id'] = \
 110                     Xrn(node_elem.attrib['component_id']).get_authority_urn()
 111
 112             # get hardware types
 113             hardware_type_elems = node_elem.xpath('./default:hardware_type | \
 114                                                             ./hardware_type')
 115             node['hardware_types'] = [hw_type.get_instance(HardwareType) \
 116                                             for hw_type in hardware_type_elems]
 117
 118             # get location
 119             location_elems = node_elem.xpath('./default:location | ./location')
 120             locations = [location_elem.get_instance(Location) \
 121                                             for location_elem in location_elems]
 122             if len(locations) > 0:
 123                 node['location'] = locations[0]
 124
 125             # get interfaces
 126             iface_elems = node_elem.xpath('./default:interface | ./interface')
 127             node['interfaces'] = [iface_elem.get_instance(Interface) \
 128                                             for iface_elem in iface_elems]
 129
 130             # get services
 131             #node['services'] = PGv2Services.get_services(node_elem)
 132
 133             # get slivers
 134             node['slivers'] = Slabv1Sliver.get_slivers(node_elem)
 135             available_elems = node_elem.xpath('./default:available | \
 136                                                                 ./available')
 137             if len(available_elems) > 0 and 'name' in available_elems[0].attrib:
 138                 if available_elems[0].attrib.get('now', '').lower() == 'true':
 139                     node['boot_state'] = 'boot'
 140                 else:
 141                     node['boot_state'] = 'disabled'
 142         return nodes
 143
 144
 145     @staticmethod
 146     def add_slivers(xml, slivers):
 147         logger.debug("SLABv1NODE \tadd_slivers ")
 148         component_ids = []
 149         for sliver in slivers:
 150             filter_sliver = {}
 151             if isinstance(sliver, str):
 152                 filter_sliver['component_id'] = '*%s*' % sliver
 153                 sliver = {}
 154             elif 'component_id' in sliver and sliver['component_id']:
 155                 filter_sliver['component_id'] = '*%s*' % sliver['component_id']
 156             if not filter_sliver:
 157                 continue
 158             nodes = Slabv1Node.get_nodes(xml, filter_sliver)
 159             if not nodes:
 160                 continue
 161             node = nodes[0]
 162             Slabv1Sliver.add_slivers(node, sliver)
 163
 164     @staticmethod
 165     def remove_slivers(xml, hostnames):
 166         for hostname in hostnames:
 167             nodes = Slabv1Node.get_nodes(xml, \
 168                                     {'component_id': '*%s*' % hostname})
 169             for node in nodes:
 170                 slivers = Slabv1Sliver.get_slivers(node.element)
 171                 for sliver in slivers:
 172                     node.element.remove(sliver.element)
 173
 174
 175