def to_sfa_rspec(in_rspec, content_type=None):
rspec = RSpec(in_rspec)
version_manager = VersionManager()
sfa_version = version_manager._get_version('sfa', '1')
pg_version = version_manager._get_version('protogeni', '2')
if rspec.version.type.lower() == sfa_version.type.lower():
return in_rspec
elif rspec.version.type.lower() == pg_version.type.lower():
return PGRSpecConverter.to_sfa_rspec(in_rspec, content_type)
else:
return in_rspec
def to_sfa_rspec(rspec, content_type = None):
if not isinstance(rspec, RSpec):
pg_rspec = RSpec(rspec)
else:
pg_rspec = rspec
version_manager = VersionManager()
sfa_version = version_manager._get_version('sfa', '1')
sfa_rspec = RSpec(version=sfa_version)
#nodes = pg_rspec.version.get_nodes()
#sfa_rspec.version.add_nodes(nodes())
#sfa_rspec.version.add_links(pg_rspec.version.get_links())
#return sfa_rspec.toxml()
# get network
networks = pg_rspec.version.get_networks()
network_hrn = networks[0]["name"]
network_element = sfa_rspec.xml.add_element('network', name=network_hrn, id=network_hrn)
# get nodes
pg_nodes_elements = pg_rspec.version.get_nodes()
nodes_with_slivers = pg_rspec.version.get_nodes_with_slivers()
i = 1
for pg_node in pg_nodes_elements:
attribs = dict(pg_node.items())
attribs['id'] = 'n'+str(i)
node_element = network_element.add_element('node')
for attrib in attribs:
if type(attribs[attrib]) == str:
node_element.set(attrib, attribs[attrib])
urn = pg_node["component_id"]
if urn:
if type(urn)==list:
# legacy code, not sure if urn is ever a list...
urn = urn[0]
hostname = Xrn.urn_split(urn)[-1]
hostname_element = node_element.add_element('hostname')
hostname_element.set_text(hostname)
if hostname in nodes_with_slivers:
node_element.add_element('sliver')
for hardware_type in pg_node["hardware_types"]:
if "name" in hardware_type:
node_element.add_element("hardware_type", name=hardware_type["name"])
# just copy over remaining child elements
#for child in pg_node_element.getchildren():
# node_element.append(transform(child).getroot())
i = i+1
return sfa_rspec.toxml()
def get_rspec(self, version=None, slice_leaf=None, projectName=None, created_vms=[], new_nodes=[], options={}):
version_manager = VersionManager()
version = version_manager.get_version(version)
if slice_leaf:
# Manifest RSpec will be used when somebody creates an sliver, returning the resources of this AM and the vm(s) requested by the user.
rspec_version = version_manager._get_version(version.type, version.version, "manifest")
options["slice"] = slice_leaf
nodes = self.get_nodes_in_geni(options, slice_leaf, projectName, created_vms, new_nodes)
rspec = RSpec(version=rspec_version, user_options=options)
rspec.version.add_nodes_geni(nodes)
else:
rspec_version = version_manager._get_version(version.type, version.version, "ad")
nodes = self.get_nodes(options, slice_leaf, projectName, created_vms, new_nodes)
rspec = RSpec(version=rspec_version, user_options=options)
# nodes = self.get_nodes(options,slice_leaf,projectName,created_vms,new_nodes)
rspec.version.add_nodes(nodes)
return rspec.toxml()
def __init__(self, rspec="", version=None, user_options={}):
self.header = '<?xml version="1.0"?>\n'
self.template = """<RSpec></RSpec>"""
self.version = None
self.xml = XML()
self.version_manager = VersionManager()
self.user_options = user_options
self.elements = {}
if rspec:
if version:
self.version = self.version_manager.get_version(version)
self.parse_xml(rspec, version)
else:
self.parse_xml(rspec)
elif version:
self.create(version)
else:
raise InvalidRSpec("No RSpec or version specified. Must specify a valid rspec string or a valid version")
class RSpec:
def __init__(self, rspec="", version=None, user_options={}):
self.header = '<?xml version="1.0"?>\n'
self.template = """<RSpec></RSpec>"""
self.version = None
self.xml = XML()
self.version_manager = VersionManager()
self.user_options = user_options
self.elements = {}
if rspec:
if version:
self.version = self.version_manager.get_version(version)
self.parse_xml(rspec, version)
else:
self.parse_xml(rspec)
elif version:
self.create(version)
else:
raise InvalidRSpec("No RSpec or version specified. Must specify a valid rspec string or a valid version")
def create(self, version=None):
"""
Create root element
"""
self.version = self.version_manager.get_version(version)
self.namespaces = self.version.namespaces
self.parse_xml(self.version.template, self.version)
# eg. 2011-03-23T19:53:28Z
date_format = '%Y-%m-%dT%H:%M:%SZ'
now = datetime.utcnow()
generated_ts = now.strftime(date_format)
expires_ts = (now + timedelta(hours=1)).strftime(date_format)
self.xml.set('expires', expires_ts)
self.xml.set('generated', generated_ts)
def parse_xml(self, xml, version=None):
self.xml.parse_xml(xml)
if not version:
if self.xml.schema:
self.version = self.version_manager.get_version_by_schema(self.xml.schema)
else:
#raise InvalidRSpec('unknown rspec schema: %s' % schema)
# TODO: Should start raising an exception once SFA defines a schema.
# for now we just default to sfa
self.version = self.version_manager.get_version({'type':'sfa','version': '1'})
self.version.xml = self.xml
self.namespaces = self.xml.namespaces
def load_rspec_elements(self, rspec_elements):
self.elements = {}
for rspec_element in rspec_elements:
if isinstance(rspec_element, RSpecElement):
self.elements[rspec_element.type] = rspec_element
def register_rspec_element(self, element_type, element_name, element_path):
if element_type not in RSpecElements:
raise InvalidRSpecElement(element_type, extra="no such element type: %s. Must specify a valid RSpecElement" % element_type)
self.elements[element_type] = RSpecElement(element_type, element_name, element_path)
def get_rspec_element(self, element_type):
if element_type not in self.elements:
msg = "ElementType %s not registerd for this rspec" % element_type
raise InvalidRSpecElement(element_type, extra=msg)
return self.elements[element_type]
def get(self, element_type, filter={}, depth=0):
elements = self.get_elements(element_type, filter)
elements = [self.xml.get_element_attributes(elem, depth=depth) for elem in elements]
return elements
def get_elements(self, element_type, filter={}):
"""
search for a registered element
"""
if element_type not in self.elements:
msg = "Unable to search for element %s in rspec, expath expression not found." % \
element_type
raise InvalidRSpecElement(element_type, extra=msg)
rspec_element = self.get_rspec_element(element_type)
xpath = rspec_element.path + XpathFilter.xpath(filter)
return self.xml.xpath(xpath)
def merge(self, in_rspec):
self.version.merge(in_rspec)
def filter(self, filter):
if 'component_manager_id' in filter:
nodes = self.version.get_node_elements()
for node in nodes:
if 'component_manager_id' not in node.attrib or \
node.attrib['component_manager_id'] != filter['component_manager_id']:
parent = node.getparent()
parent.remove(node)
def toxml(self, header=True):
if header:
return self.header + self.xml.toxml()
else:
return self.xml.toxml()
def save(self, filename):
return self.xml.save(filename)
def to_pg_rspec(rspec, content_type = None):
if not isinstance(rspec, RSpec):
sfa_rspec = RSpec(rspec)
else:
sfa_rspec = rspec
if not content_type or content_type not in \
['ad', 'request', 'manifest']:
content_type = sfa_rspec.version.content_type
version_manager = VersionManager()
pg_version = version_manager._get_version('protogeni', '2', 'request')
pg_rspec = RSpec(version=pg_version)
# get networks
networks = sfa_rspec.version.get_networks()
for network in networks:
# get nodes
sfa_node_elements = sfa_rspec.version.get_node_elements(network=network)
for sfa_node_element in sfa_node_elements:
# create node element
node_attrs = {}
node_attrs['exclusive'] = 'false'
if 'component_manager_id' in sfa_node_element.attrib:
node_attrs['component_manager_id'] = sfa_node_element.attrib['component_manager_id']
else:
node_attrs['component_manager_id'] = hrn_to_urn(network, 'authority+cm')
if 'component_id' in sfa_node_element.attrib:
node_attrs['compoenent_id'] = sfa_node_element.attrib['component_id']
if sfa_node_element.find('hostname') != None:
hostname = sfa_node_element.find('hostname').text
node_attrs['component_name'] = hostname
node_attrs['client_id'] = hostname
node_element = pg_rspec.xml.add_element('node', node_attrs)
if content_type == 'request':
sliver_element = sfa_node_element.find('sliver')
sliver_type_elements = sfa_node_element.xpath('./sliver_type', namespaces=sfa_rspec.namespaces)
available_sliver_types = [element.attrib['name'] for element in sliver_type_elements]
valid_sliver_types = ['emulab-openvz', 'raw-pc']
# determine sliver type
requested_sliver_type = 'emulab-openvz'
for available_sliver_type in available_sliver_types:
if available_sliver_type in valid_sliver_types:
requested_sliver_type = available_sliver_type
if sliver_element != None:
pg_rspec.xml.add_element('sliver_type', {'name': requested_sliver_type}, parent=node_element)
else:
# create node_type element
for hw_type in ['plab-pc', 'pc']:
hdware_type_element = pg_rspec.xml.add_element('hardware_type', {'name': hw_type}, parent=node_element)
# create available element
pg_rspec.xml.add_element('available', {'now': 'true'}, parent=node_element)
# create locaiton element
# We don't actually associate nodes with a country.
# Set country to "unknown" until we figure out how to make
# sure this value is always accurate.
location = sfa_node_element.find('location')
if location != None:
location_attrs = {}
location_attrs['country'] = location.get('country', 'unknown')
location_attrs['latitude'] = location.get('latitude', 'None')
location_attrs['longitude'] = location.get('longitude', 'None')
pg_rspec.xml.add_element('location', location_attrs, parent=node_element)
return pg_rspec.toxml()