from copy import deepcopy
from StringIO import StringIO
from sfa.util.xrn import Xrn, urn_to_sliver_id
from sfa.util.plxrn import hostname_to_urn, xrn_to_hostname
from sfa.rspecs.baseversion import BaseVersion
from sfa.rspecs.elements.versions.slabv1Node import Slabv1Node
from sfa.rspecs.elements.versions.slabv1Sliver import Slabv1Sliver
class Slabv1(BaseVersion):
#enabled = True
type = 'Slab'
content_type = 'ad'
version = '1'
#template = '' % type
schema = 'http://senslab.info/resources/rspec/1/ad.xsd'
namespace = 'http://www.geni.net/resources/rspec/3'
extensions = {
'flack': "http://www.protogeni.net/resources/rspec/ext/flack/1",
'planetlab': "http://www.planet-lab.org/resources/sfa/ext/planetlab/1",
}
namespaces = dict(extensions.items() + [('default', namespace)])
elements = []
# Network
def get_networks(self):
network_elems = self.xml.xpath('//network')
networks = [network_elem.get_instance(fields=['name', 'slice']) for \
network_elem in network_elems]
return networks
def add_network(self, network):
network_tags = self.xml.xpath('//network[@name="%s"]' % network)
if not network_tags:
network_tag = self.xml.add_element('network', name=network)
else:
network_tag = network_tags[0]
return network_tag
# Nodes
def get_nodes(self, filter=None):
return Slabv1Node.get_nodes(self.xml, filter)
def get_nodes_with_slivers(self):
return Slabv1Node.get_nodes_with_slivers(self.xml)
def add_nodes(self, nodes, check_for_dupes=False):
return Slabv1Node.add_nodes(self.xml, nodes)
def merge_node(self, source_node_tag, network, no_dupes = False):
if no_dupes and self.get_node_element(node['hostname']):
# node already exists
return
network_tag = self.add_network(network)
network_tag.append(deepcopy(source_node_tag))
# Slivers
def get_sliver_attributes(self, hostname, network=None):
nodes = self.get_nodes({'component_id': '*%s*' %hostname})
attribs = []
if nodes is not None and isinstance(nodes, list) and len(nodes) > 0:
node = nodes[0]
sliver = node.xpath('./default:sliver_type', namespaces=self.namespaces)
if sliver is not None and isinstance(sliver, list) and len(sliver) > 0:
sliver = sliver[0]
#attribs = self.attributes_list(sliver)
return attribs
def get_slice_attributes(self, network=None):
slice_attributes = []
nodes_with_slivers = self.get_nodes_with_slivers()
# TODO: default sliver attributes in the PG rspec?
default_ns_prefix = self.namespaces['default']
for node in nodes_with_slivers:
sliver_attributes = self.get_sliver_attributes(node, network)
for sliver_attribute in sliver_attributes:
name=str(sliver_attribute[0])
text =str(sliver_attribute[1])
attribs = sliver_attribute[2]
# we currently only suppor the and attributes
if 'info' in name:
attribute = {'name': 'flack_info', 'value': str(attribs), 'node_id': node}
slice_attributes.append(attribute)
elif 'initscript' in name:
if attribs is not None and 'name' in attribs:
value = attribs['name']
else:
value = text
attribute = {'name': 'initscript', 'value': value, 'node_id': node}
slice_attributes.append(attribute)
return slice_attributes
def attributes_list(self, elem):
opts = []
if elem is not None:
for e in elem:
opts.append((e.tag, str(e.text).strip(), e.attrib))
return opts
def get_default_sliver_attributes(self, network=None):
return []
def add_default_sliver_attribute(self, name, value, network=None):
pass
def add_slivers(self, hostnames, attributes=[], sliver_urn=None, append=False):
# all nodes hould already be present in the rspec. Remove all
# nodes that done have slivers
for hostname in hostnames:
node_elems = self.get_nodes({'component_id': '*%s*' % hostname})
if not node_elems:
continue
node_elem = node_elems[0]
# determine sliver types for this node
valid_sliver_types = ['slab-node', 'emulab-openvz', 'raw-pc', 'plab-vserver', 'plab-vnode']
#valid_sliver_types = ['emulab-openvz', 'raw-pc', 'plab-vserver', 'plab-vnode']
requested_sliver_type = None
for sliver_type in node_elem.get('slivers', []):
if sliver_type.get('type') in valid_sliver_types:
requested_sliver_type = sliver_type['type']
if not requested_sliver_type:
continue
sliver = {'type': requested_sliver_type,
'pl_tags': attributes}
# remove available element
for available_elem in node_elem.xpath('./default:available | ./available'):
node_elem.remove(available_elem)
# remove interface elements
for interface_elem in node_elem.xpath('./default:interface | ./interface'):
node_elem.remove(interface_elem)
# remove existing sliver_type elements
for sliver_type in node_elem.get('slivers', []):
node_elem.element.remove(sliver_type.element)
# set the client id
node_elem.element.set('client_id', hostname)
if sliver_urn:
pass
# TODO
# set the sliver id
#slice_id = sliver_info.get('slice_id', -1)
#node_id = sliver_info.get('node_id', -1)
#sliver_id = urn_to_sliver_id(sliver_urn, slice_id, node_id)
#node_elem.set('sliver_id', sliver_id)
# add the sliver type elemnt
Slabv1SliverType.add_slivers(node_elem.element, sliver)
# remove all nodes without slivers
if not append:
for node_elem in self.get_nodes():
if not node_elem['client_id']:
parent = node_elem.element.getparent()
parent.remove(node_elem.element)
def remove_slivers(self, slivers, network=None, no_dupes=False):
Slabv1Node.remove_slivers(self.xml, slivers)
# Utility
def merge(self, in_rspec):
"""
Merge contents for specified rspec with current rspec
"""
from sfa.rspecs.rspec import RSpec
# just copy over all the child elements under the root element
if isinstance(in_rspec, basestring):
in_rspec = RSpec(in_rspec)
nodes = in_rspec.version.get_nodes()
# protogeni rspecs need to advertise the availabel sliver types
for node in nodes:
if not node.has_key('sliver') or not node['sliver']:
node['sliver'] = {'name': 'slab-node'}
self.add_nodes(nodes)
#self.add_links(in_rspec.version.get_links())
#
#rspec = RSpec(in_rspec)
#for child in rspec.xml.iterchildren():
# self.xml.root.append(child)
def cleanup(self):
# remove unncecessary elements, attributes
if self.type in ['request', 'manifest']:
# remove 'available' element from remaining node elements
self.xml.remove_element('//default:available | //available')
class Slabv1Ad(Slabv1):
enabled = True
content_type = 'ad'
schema = 'http://senslab.info/resources/rspec/1/ad.xsd'
#http://www.geni.net/resources/rspec/3/ad.xsd'
template = ''
class Slabv1Request(Slabv1):
enabled = True
content_type = 'request'
schema = 'http://senslab.info/resources/rspec/1/request.xsd'
#http://www.geni.net/resources/rspec/3/request.xsd
template = ''
class Slabv1Manifest(Slabv1):
enabled = True
content_type = 'manifest'
schema = 'http://senslab.info/resources/rspec/1/manifest.xsd'
#http://www.geni.net/resources/rspec/3/manifest.xsd
template = ''
#class Slabv1Ad(Slabv1):
#enabled = True
#content_type = 'ad'
#schema = 'http://senslab.info/resources/rspec/1/ad.xsd'
##http://www.geni.net/resources/rspec/3/ad.xsd'
#template = ''
#class Slabv1Request(Slabv1):
#enabled = True
#content_type = 'request'
#schema = 'http://senslab.info/resources/rspec/1/request.xsd'
##http://www.geni.net/resources/rspec/3/request.xsd
#template = ''
#class Slabv1Manifest(Slabv1):
#enabled = True
#content_type = 'manifest'
#schema = 'http://senslab.info/resources/rspec/1/manifest.xsd'
##http://www.geni.net/resources/rspec/3/manifest.xsd
#template = ''
if __name__ == '__main__':
from sfa.rspecs.rspec import RSpec
from sfa.rspecs.rspec_elements import *
r = RSpec('/tmp/slab.rspec')
r.load_rspec_elements(Slabv1.elements)
r.namespaces = Slabv1.namespaces
print r.get(RSpecElements.NODE)