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
  19         node_elems = []
  20         for node in nodes:
  21             node_fields = ['component_manager_id', 'component_id', \
  22                         'client_id', 'sliver_id', 'exclusive','boot_state']
  23             node_elem = xml.add_instance('node', node, node_fields)
  24             node_elems.append(node_elem)
  25             # set component name
  26             if node.get('component_id'):
  27                 component_name = xrn_to_hostname(node['component_id'])
  28                 node_elem.set('component_name', component_name)
  29             # set hardware types
  30             if node.get('hardware_types'):
  31                 for hardware_type in node.get('hardware_types', []):
  32                     node_elem.add_instance('hardware_type', hardware_type, \
  33                                                     HardwareType.fields)
  34             # set location
  35             if node.get('location'):
  36                 node_elem.add_instance('location', node['location'], \
  37                                                         Location.fields)
  38
  39             # set interfaces
  40             #if node.get('interfaces'):
  41                 #for interface in  node.get('interfaces', []):
  42                     #node_elem.add_instance('interface', interface, ['component_id', 'client_id'])
  43             # set available element
  44             if node.get('boot_state'):
  45                 if node.get('boot_state').lower() == 'alive':
  46                     available_elem = node_elem.add_element('available', \
  47                                                                     now='true')
  48                 else:
  49                     available_elem = node_elem.add_element('available', \
  50                                                                 now='false')
  51
  52             ## add services
  53             #PGv2Services.add_services(node_elem, node.get('services', []))
  54             # add slivers
  55             slivers = node.get('slivers', [])
  56             if not slivers:
  57                 # we must still advertise the available sliver types
  58                 slivers = Sliver({'type': 'slab-node'})
  59                 # we must also advertise the available initscripts
  60                 slivers['tags'] = []
  61                 if node.get('pl_initscripts'):
  62                     for initscript in node.get('pl_initscripts', []):
  63                         slivers['tags'].append({'name': 'initscript', \
  64                                                 'value': initscript['name']})
  65
  66             Slabv1Sliver.add_slivers(node_elem, slivers)
  67         return node_elems
  68
  69     @staticmethod
  70     def get_nodes(xml, filter={}):
  71         xpath = '//node%s | //default:node%s' % (XpathFilter.xpath(filter), \
  72                                                     XpathFilter.xpath(filter))
  73         node_elems = xml.xpath(xpath)
  74         logger.debug("SLABV1NODE  \tget_nodes \tnode_elems %s"%(node_elems))
  75         return Slabv1Node.get_node_objs(node_elems)
  76
  77     @staticmethod
  78     def get_nodes_with_slivers(xml, sliver_filter={}):
  79
  80         xpath = '//node[count(sliver)>0] | \
  81                                 //default:node[count(default:sliver) > 0]'
  82         node_elems = xml.xpath(xpath)
  83         logger.debug("SLABV1NODE \tget_nodes_with_slivers  \
  84                                 node_elems %s"%(node_elems))
  85         return Slabv1Node.get_node_objs(node_elems)
  86
  87     @staticmethod
  88     def get_node_objs(node_elems):
  89         nodes = []
  90         for node_elem in node_elems:
  91             node = Node(node_elem.attrib, node_elem)
  92             nodes.append(node)
  93             if 'component_id' in node_elem.attrib:
  94                 node['authority_id'] = \
  95                     Xrn(node_elem.attrib['component_id']).get_authority_urn()
  96
  97             # get hardware types
  98             hardware_type_elems = node_elem.xpath('./default:hardware_type | \
  99                                                             ./hardware_type')
 100             node['hardware_types'] = [hw_type.get_instance(HardwareType) \
 101                                             for hw_type in hardware_type_elems]
 102
 103             # get location
 104             location_elems = node_elem.xpath('./default:location | ./location')
 105             locations = [location_elem.get_instance(Location) \
 106                                             for location_elem in location_elems]
 107             if len(locations) > 0:
 108                 node['location'] = locations[0]
 109
 110             # get interfaces
 111             iface_elems = node_elem.xpath('./default:interface | ./interface')
 112             node['interfaces'] = [iface_elem.get_instance(Interface) \
 113                                             for iface_elem in iface_elems]
 114
 115             # get services
 116             #node['services'] = PGv2Services.get_services(node_elem)
 117
 118             # get slivers
 119             node['slivers'] = Slabv1Sliver.get_slivers(node_elem)
 120             available_elems = node_elem.xpath('./default:available | \
 121                                                                 ./available')
 122             if len(available_elems) > 0 and 'name' in available_elems[0].attrib:
 123                 if available_elems[0].attrib.get('now', '').lower() == 'true':
 124                     node['boot_state'] = 'boot'
 125                 else:
 126                     node['boot_state'] = 'disabled'
 127         return nodes
 128
 129
 130     @staticmethod
 131     def add_slivers(xml, slivers):
 132         logger.debug("SLABv1NODE \tadd_slivers ")
 133         component_ids = []
 134         for sliver in slivers:
 135             filter_sliver = {}
 136             if isinstance(sliver, str):
 137                 filter_sliver['component_id'] = '*%s*' % sliver
 138                 sliver = {}
 139             elif 'component_id' in sliver and sliver['component_id']:
 140                 filter_sliver['component_id'] = '*%s*' % sliver['component_id']
 141             if not filter_sliver:
 142                 continue
 143             nodes = Slabv1Node.get_nodes(xml, filter_sliver)
 144             if not nodes:
 145                 continue
 146             node = nodes[0]
 147             Slabv1Sliver.add_slivers(node, sliver)
 148
 149     @staticmethod
 150     def remove_slivers(xml, hostnames):
 151         for hostname in hostnames:
 152             nodes = Slabv1Node.get_nodes(xml, \
 153                                     {'component_id': '*%s*' % hostname})
 154             for node in nodes:
 155                 slivers = Slabv1Sliver.get_slivers(node.element)
 156                 for sliver in slivers:
 157                     node.element.remove(sliver.element)
 158 if __name__ == '__main__':
 159     from sfa.rspecs.rspec import RSpec
 160
 161     r = RSpec('/tmp/slab.rspec')
 162     r2 = RSpec(version = 'slab')
 163     getnodes = Slabv1Node.get_nodes(r.xml)
 164     Slabv1Node.add_nodes(r2.xml.root, getnodes)
 165
 166
 167