def do_info( self, line ):
"Print short info about a VNF or all of them if none is specified."
vnf_catalog = Catalog().get_db()
for metadata in vnf_catalog.itervalues():
try:
if metadata['name'] == line.strip():
for k, v in metadata.iteritems():
output('%s: %s\n' % (k, v))
break
except KeyError:
pass
else:
for metadata in vnf_catalog.itervalues():
try:
info = metadata.get('description', '').split('\n')[0]
output('%s: %s\n' % (metadata['name'], info))
except KeyError:
pass
class VNFClickBuilder():
def __init__(self):
self.catalog = Catalog()
def create_vnf(self, opts, host):
options = copy.deepcopy(opts)
host_name = getattr(host, 'name', None)
if host_name is None:
raise RuntimeError("Unsupported host type: %s" % type(host))
vnf = Store()
del options['name']
vnf.startCmd = self.catalog.make_cmd(options['function'],
name=host_name,
**options)
return vnf
def start(self, nf_g, phy_g=None):
"""
Create the service chain
- Do the resource mapping process
- Starts the virtual network element
- Install the OF routes
Return list of the newly initiated VNFs
"""
# TODO: instead of phy_g, rely on NetworkManager, or simple_topology
# Using NetworkManager to get physical topology if phy_g is not given explicitly
if not phy_g:
phy_g = self.network_manager.get_initial_topology()
# dump(phy_g, 'NetMen converted topo')
if nf_g.number_of_nodes() < 1 or phy_g.number_of_nodes(
) < 1 or not self.network_manager.network_alive():
return []
# Run the resource mapping algorithm
vnf_to_host_list = Mapping.map(nf_g, phy_g, DefaultSorter)
vnf_options = nf_g.node
# Config vnf_manager
vnf_manager = self.network_manager.vnf_manager
vnf_manager.set_vnf_catalog(Catalog().get_db())
# Start mapped VNFs on physical network element
vnf_manager.start_vnfs(vnf_to_host_list, vnf_options)
# Install routes
# update states of VNFs run by netconf agents before route install
# (to make phy_g consistent (containing remote VNFs as well))
self.network_manager.scan_network(forced=True)
# Error: If phy_g contains initial_topo from NetworkManager,
# VNFs are always excluded and no routes will be installed!!
self.rm.install_routes(nf_g, phy_g)
return vnf_to_host_list
def __init__(self):
self.catalog = Catalog()
def __init__ (self):
self.vnf_type = None
self._parse_args()
self.catalog = Catalog()
self.click_proc = None
atexit.register(self.kill_click_proc)
class ClickHelper( object ):
'''
Helper class for starting Click-based VNFs
VNF info is read from VNF catalog
'''
def __init__ (self):
self.vnf_type = None
self._parse_args()
self.catalog = Catalog()
self.click_proc = None
atexit.register(self.kill_click_proc)
def _parse_args(self):
'''
Loading command line args coming from netconfd to a dictionary
Format: arg1=argval1 ar2=argval2 ...
'''
self.opts = dict(map(lambda x: x.split('='),sys.argv[1:]))
self.updateDevs()
def updateDevs(self):
'Update devs list based on opts (ex: dev_x=uny_y)'
devs = [(k, v) for k,v in self.opts.iteritems() if k.startswith('dev')]
devs = dict(devs)
devlist = []
for k in sorted(devs.keys()):
devlist.append(devs[k])
self.opts.update({'devs': devlist})
def setVNFType(self):
'Set vnf_type based on opts'
try:
self.vnf_type = self.opts['type']
except KeyError:
self.vnf_type = None
return self.vnf_type
def getVNFType(self):
return self.vnf_type
def logVNFType(self):
if self.vnf_type:
#print self.vnf_type
with open('/tmp/vnftype.log', 'w') as f:
f.write(str(self.vnf_type))
f.close()
def initVNF(self):
'Initialize VNF, make command'
self.setVNFType()
opts = copy.deepcopy(self.opts)
startCmd = self.catalog.make_cmd(opts['type'],
name = opts['vnf_id'],
**self.opts)
startCmd = startCmd.replace('&', ' ')
self.startCmd = startCmd
def getVNFCmd(self):
return self.startCmd
def logVNFCmd(self):
if self.startCmd:
print self.startCmd
with open('/tmp/vnfcmd.log', 'w') as f:
f.write(str(self.startCmd))
f.close()
def startVNF(self):
'''Execute previously assembled VNF command
output: -1: fork failed, high error code: invalid argument'''
print self.startCmd
#return os.system(self.startCmd)
# return subprocess.call(['sh', '-c', self.startCmd])
proc = subprocess.Popen(['sh', '-c', self.startCmd])
self.click_proc = proc
#blocking parent
output, error = proc.communicate()
exitcode = proc.wait()
return output, error, exitcode
def kill_click_proc(self):
if self.click_proc is None:
pass
else:
print "Kill click process, PID: %s" % self.click_proc.pid
self.click_proc.kill()
def do_reload( self, line):
"Reload VNF catalog"
Catalog().load(line)
def complete_info( self, text, line, begidx, endidx):
names = Catalog().get_db().keys()
return [n for n in names if n.startswith(text)]
def add_VNFs():
""" add VNFs to catalog (required parameters should be given) """
#1. First single Click elements are added to the DB
Catalog().add_VNF(vnf_name='FromDevice',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='ToDevice',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Queue',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Tee',vnf_type='Click',hidden='True')
#Catalog().add_VNF(vnf_name='Counter',vnf_type='Click',clickPath='/home/click',
# clickSource=['elements/standard/counter.cc','elements/standard/counter.cc'])
Catalog().add_VNF(vnf_name='Counter',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Classifier',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='IPClassifier',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='StripIPHeader',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='UnstripIPHeadet',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Strip',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Unstrip',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='ICMPPingSource',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='ARPQuerier',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='AggregateIPFlows',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='RFC2507Comp',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='RFC2507Decomp',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='IPAddRewriter',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='TCPOptimizer',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='MarkIPHeader',vnf_type='Click',hidden='True')
Catalog().add_VNF(vnf_name='Print',vnf_type='Click',hidden='True')
#2. Then the VNFs composed of several Click elements are added to the DB
Catalog().add_VNF(vnf_name = 'simpleForwarder',
vnf_type = 'Click',
description = 'receive on the data interface and loop back the packet',
icon = 'forward.png')
Catalog().add_VNF(vnf_name = 'simpleObservationPoint',
vnf_type = 'Click',
description = 'A simple observation point in click',
icon = 'search.png')
Catalog().add_VNF(vnf_name = 'headerCompressor',
vnf_type = 'Click',
description = 'Compress IPv4/TCP headers as defined in RFC2507',
icon = 'decompress_small.png')
Catalog().add_VNF(vnf_name = 'headerDecompressor',
vnf_type = 'Click',
description = 'Decompress IPv4/TCP headers as defined in RFC2507',
icon = 'compress2_small.png')
Catalog().add_VNF(vnf_name = 'nat',
vnf_type = 'Click',
hidden = 'True',
description = 'Provide the functionality of basic network address translator')
Catalog().add_VNF(vnf_name = 'tcpRWINOptimizer',
vnf_type = 'Click',
description = 'TCP Optimizer',
icon = 'forward.png')
Catalog().add_VNF(vnf_name = 'testVNF',
vnf_type = 'Click',
description = 'A test VNF',
icon = 'forward.png')
Catalog().add_VNF(vnf_name = 'RlncOnTheFlyEncoder',
vnf_type = 'Click',
description = 'Rlnc encoder with kodo.',
icon = 'forward.png')
Catalog().add_VNF(vnf_name = 'RlncOnTheFlyDecoder',
vnf_type = 'Click',
description = 'Rlnc decoder with kodo',
icon = 'forward.png')
print Catalog().get_db()
def del_VNFs(vnf_list):
for vnf in vnf_list:
if Catalog().get_VNF(vnf_name = vnf) != []:
Catalog().remove_VNF(vnf_name = vnf)
