def on_post(self, req, resp):
rt = Runtime(self._uri, proxy={"subscribe": False})
form = req.get_media()
for part in form:
if part.filename:
ex = Exnode({
'name': part.secure_filename,
'mode': 'file',
'created': int(time.time() * 1000000),
'modified': int(time.time() * 1000000),
'parent': None,
'owner': 'wdln',
'group': 'wdln',
'permission': '744'
})
try:
with DLTFile(ex, "w", bs=self._bs,
dest=self._stage) as dest:
part.stream.pipe(dest)
except AllocationError as exp:
resp.status = falcon.HTTP_500
resp.text = {"errorcode": 1, "msg": esp.msg}
rt.insert(ex, commit=True)
for a in ex.extents:
rt.insert(a, commit=True)
rt.flush()
resp.cache_control = ['no-cache', 'no-store']
resp.status = falcon.HTTP_201
resp.text = {"fid": ex.id, "status": "GOOD", "size": ex.size}
class SDN_Handler(object):
def __init__(self, runtime_url=None, domain_name=None):
# Connect to runtime
try:
if runtime_url is not None:
self.rt = Runtime(runtime_url, name="zof")
else:
print("Connecting to localhost...")
self.rt = Runtime("http://localhost:8888")
except Exception as e:
print(e)
raise Exception("Could not connect to runtime.")
self.switches = []
self.util = UnisUtil(self.rt)
self.link_handler = LinkHandler(self.rt)
def handle_switch_enter(self, event):
try:
dpid = event['datapath'].id
switch = self.util.check_switch_exists(dpid)
except:
switch = None
dpid = event['datapath_id']
if switch is None:
print("Could not find Unis resource for , creating new resource")
switch = self.util.create_new_switch(event)
else:
print("Found Unis resource for Datapath ID %s." % (switch.datapathid))
print("Checking ports")
self.util.check_switch_ports(switch, event)
self.util.check_node_in_domain(switch, self.local_domain)
self.rt.flush()
return
def handle_lldp(self, event):
in_port = event['msg']['in_port']
# checks to see if a node exists, and the corresponding port discovered via lldp
node = self.util.check_lldp_msg(event['msg'], event['datapath_id'])
port_name = node.name + ":" + event['msg']['pkt']['x_lldp_port_descr']
node_port = self.util.check_update_node(node, event['msg'])
#node_port.touch()
node.touch()
self.util.check_node_in_domain(node, self.local_domain)
print("DATAPATH ID: ", event['datapath_id'])
switch_node = self.rt.nodes.first_where({"name": "switch:" + str(event['datapath'].id)})
switch_port = self.util.find_port_in_node_by_port_num(switch_node, in_port)
if switch_port is None:
print("Could not find port in Switch. Continuing.")
return
if node_port is None:
print("Could not find port in Node. Creating..")
node_port = Port({"name":port_name, "properties":{"type":"virtual"}})
self.rt.insert(node_port, commit=True)
node.ports.append(node_port)
self.domain.ports.append(node_port)
self.rt.flush()
return
# checks to see if a link between the src/dst ports via lldp exist.
link = self.link_handler.check_link_connecting_ports(switch_port, node_port)
if link is None:
link = self.link_handler.create_new_link(switch_port, node_port)
self.rt.insert(link, commit=True)
print("New link created between %s and %s" % (switch_port.name, node_port.name))
self.rt.flush()
link.touch()
self.util.check_link_in_domain(link, self.local_domain)
print("Finished LLDP Update.")
return
class SNMP_Manager():
def __init__(self, host, community="aspiringvision", version=2, rt=None):
self.host = host
self.community = community
self.version = version
self.session = Session(hostname=self.host, community=self.community, version=self.version)
self.neighbors = []
self.osiris_service_manifest = [
{ 'name': 'snmpd', 'desc': 'SNMP daemon.', 'unis_name': 'snmp', 'unis_service_type': 'host:snmp'},
{ 'name': 'ryu-manager', 'desc': 'RYU SDN Controller.', 'unis_name': 'ryu', 'unis_service_type': 'nmal:tools:ryu'},
{ 'name': 'lldpd', 'desc': 'LLDP daemon.', 'unis_name': 'lldp', 'unis_service_type': 'host:lldp'},
{ 'name': 'periscoped', 'desc': 'UNIS network resource database.', 'unis_name': 'periscope', 'unis_service_type': 'ps:tools:periscope'},
{ 'name': 'node', 'desc': 'NodeJS web application.', 'unis_name': 'nodejs', 'unis_service_type': 'host:node'},
{ 'name': 'blippd', 'desc': 'BLIPP performance monitoring tool.', 'unis_name': 'blipp', 'unis_service_type': 'ps:tools:blipp'},
{ 'name': 'ntpd', 'desc': 'Network Time Protocol Daemon', 'unis_name': 'ntp', 'unis_service_type': 'host:ntp'},
{ 'name': 'schedular', 'desc': 'PSchedular Service', 'unis_name': 'pschedular', 'unis_service_type': 'ps:tools:pschedular'},
{ 'name': 'archiver', 'desc': 'PerfSONAR Esmond Archive utility', 'unis_name': 'esmond', 'unis_service_type': 'ps:tools:esmond'},
{ 'name': 'owampd', 'desc': 'OWAMP web server', 'unis_name': 'owamp', 'unis_service_type': 'host:owamp'}]
# TODO: make runtime element from config, hardcode placeholder for now
if rt is None:
self.rt = Runtime('http://172.18.0.25:9000')
else:
self.rt = rt
#
# SNMP Query Helpers
#
################
'''
SNMP Query a Host for its IP Routing Table. This OID corresponds to link layer `arp -a` command.
Returns a list of IP/Mac address values styled {'ip': <ip address value>, 'dict':<mac address value>}
'''
def get_ip_routes(self, host=None):
if host is not None:
self.session = Session(hostname=host, community=self.community, version=self.version)
ret = self.session.walk(ip_table_oid)
result = []
for item in ret:
mac = self.convert_mac_addr(item.value)
ip = self.parse_ip_addr(item.oid_index)
ip_mac_dict = { 'ip': ip, 'mac': mac}
result.append(ip_mac_dict)
self.neighbors.append(ip_mac_dict)
return result
def get_services_list(self, host=None):
session = Session(hostname=host, community=self.community, version=self.version)
try:
query = session.walk(running_procs_oid)
except Exception as e:
print(e)
print('SNMP Service Query Failed')
return
result = []
s_name_track = []
for item in query:
s = self.service_in_manifest(item.value)
if len(s) == 1:
if s[0]['name'] not in s_name_track:
s_name_track.append(s[0]['name'])
result.append(s[0])
return result
#
# Use SNMP information to update resources.
#
##############
'''
Takes a dict { ip: <val>, mac: <val>}.
Generates a new node resource to be added to the topology. Handle link generation.
Links are based off the mac address
'''
def add_discovered_node(self, ip_mac_dict):
ip = ip_mac_dict['ip']
mac = ip_mac_dict['ip']
node = Node({
'name': ip,
'description': ('Discovered by ' + self.host + ' via SNMP'),
'properties': {
'mgmtaddr': ip
}
})
port = Port({
'name': ip + ':' + mac,
'address' : {
'type':'mac',
'address': mac
},
'properties':{
'type':'virtual_link',
}
})
try:
node.ports.append(port)
node = self.rt.insert(node, commit=True)
port = self.rt.insert(port, commit=True)
self.rt.domains[0].nodes.append(node)
self.rt.domains[0].ports.append(port)
self.rt.domains[0].commit()
self.rt.flush()
except:
raise AttributeError("Could not commit Object to Domain")
return node
'''
The SNMP query will give the local routing table for a given resource.
If a node is discovered, ensure there is a valid link for it given the namescheme.
If there is no link describing this connection, make one.
'''
def test_link(self, test_node):
host_node = self.check_node_exists(ip=self.host)
print("Testing for links between ", host_node.name, " and ", test_node.name)
for host_port in host_node.ports:
for test_port in test_node.ports:
test_link_name = host_port.id + ':' + test_port.id
test_link_name2 = test_port.id + ':' + host_port.id
for link in self.rt.links:
if link.name == test_link_name or link.name == test_link_name2:
print("FOUND LINK connecting ", host_node.name, " and ", test_node.name)
return link
print("Could not find link connecting ", host_node.name," and ", test_node.name, " - CREATING LINK.")
# need to determine specific ports for link generation, TODO
link = Link({
'name': host_node.ports[0].id + ':' + test_node.ports[0].id,
'endpoints': [test_node.ports[0], host_node.ports[0]],
'directed': False,
'properties': {
'type':'arp',
}
})
self.rt.insert(link, commit=True)
self.rt.domains[0].links.append(link)
self.rt.domains[0].commit()
self.rt.flush()
print("New link created.")
return link
'''
Query the currently running services for a given host.
Test to see if the service exists. If it does, poke the timestamp.
If it does not, create a new service entry and push it to UNIS.
If there is a service entry no longer running on the Host set the service to
not running.
'''
def update_services(self, ip):
services_list = self.get_services_list(host=ip)
print("Service List for ", ip, " - ", services_list)
node = self.check_node_exists(ip=ip)
unis_services = []
if node is not None:
services = self.rt.services.where({'runningOn': node, 'status':'ON' })
try:
for s in services:
unis_services.append(s)
except:
print('Could not find any existing UNIS entries for services at host ' + node.name)
# check if service exists in UNIS, if not create one
for item in services_list:
matches = list(filter(lambda s: s.name == item['unis_name'], unis_services))
if len(matches) > 0: # if there are matches, touch
print("Found existing service for " + item['unis_name'] + " at host " + node.name + ". Updating timestamp.")
map(lambda s: s.touch(), matches)
else:
# create new services
print('Creating new service for ' + item['unis_name'] + ' at host ' + node.name)
service = Service({'name':item['unis_name'], 'runningOn': {'href': node.selfRef, 'rel': 'full'}, 'status':'ON', 'serviceType': item['unis_service_type']})
self.rt.insert(service, commit=True)
self.rt.flush()
else:
print('Node not found for ' + ip + ', continuing.')
return
'''
apply_snmp_nodes will search through a list of dicts { ip: <val>, mac: <val>} to see if a corresponding node
exists in UNIS. if the node does not exist it will register the node in UNIS.
Once all dicts in the supplied list have been processed, query the SNMP query the ip and repeat the function
'''
def apply_snmp_nodes(self, ip_mac_list):
for i in ip_mac_list:
print('Checking - IP: ', i['ip'], " | Mac: ", i['mac'])
n = self.check_node_exists(ip = i['ip'], mac = i['mac'])
if n is None:
print("Node with IP address ", i['ip'], " not found. CREATING NEW NODE resource.")
n = self.add_discovered_node(i)
else:
print("FOUND NODE with IP address ", n.properties.mgmtaddr)
# see if there is a valid link in UNIS for this node.
self.test_link(n)
# find and update service entries in UNIS for this host.
self.update_services(self.host)
return
'''
Main function for learning about the network.
'''
def discover(self):
print("BEGIN discovery of base host ", self.host)
snmp_ip_mac_list = self.get_ip_routes()
self.apply_snmp_nodes(snmp_ip_mac_list)
def discover_neighbors(self):
for ip_mac_dict in self.neighbors:
try:
print("Trying to query ", ip_mac_dict['ip'])
snmp_q = SNMP_Manager(host=ip_mac_dict['ip'], rt=self.rt)
snmp_q.discover()
print("Successful Query of ", ip_mac_dict['ip'])
except:
print("Error querying SNMP for , ", ip_mac_dict["ip"], " - continuing.")
continue
#
# Helper Functions for processing SNMP Results
#
##########
def convert_mac_addr(self, mac_str):
byte_from_string = mac_str.encode()
return byte_from_string.hex()
def parse_ip_addr(self, ip_oid):
ip_addr = '.'.join(ip_oid.split('.')[-4:])
print(ip_addr)
return ip_addr
def service_in_manifest(self, service_string):
result = list(filter(lambda s: s['name'] == service_string, self.osiris_service_manifest))
return result
#
# UNIS Integration
#
#########
def check_node_exists(self, ip = None, mac = None):
if ip is None and mac is None:
raise ValueError('Function check_node_exists must be given an ip=<ip address> or mac=<mac address> parameter.')
for n in self.rt.nodes:
if n.properties.mgmtaddr == ip:
return n
return None
class RegistrationHandler(object):
def __init__(self, local_runtime, remote_runtime_url):
self.local_rt = local_runtime
self.remote_rt = Runtime(remote_runtime_url, name="Remote")
def check_local_topology(self, topology_name):
local_topology = self.local_rt.topologies.first_where(
{"name": topology_name})
if local_topology is not None:
print("Found Local Topology", topology_name)
else:
print("Local Topology not found. Creating new entry in local UNIS")
local_topology = Topology({"name": topology_name})
self.local_rt.insert(local_topology, commit=True)
self.local_rt.flush()
return local_topology
def check_local_domain(self, domain_name, local_topology):
local_domain = self.local_rt.domains.first_where({"name": domain_name})
if local_domain is not None:
print("Found Local Domain - ", domain_name)
else:
print("Local Domain - ", domain_name,
", not found. Creating new entry in local UNIS")
local_domain = Domain({"name": domain_name})
self.local_rt.insert(local_domain, commit=True)
self.local_rt.flush()
for domain in local_topology.domains:
if domain.id == local_domain.id:
return local_domain
print("Domain not in local topology, adding..")
local_topology.domains.append(local_domain)
self.local_rt.flush()
return local_domain
'''
Upload local topology domain to remote UNIS instance.
If no remote UNIS exists create the remote topology instance.
'''
def register_remote(self, topology_name, domain):
remote_topology = self.remote_rt.topologies.first_where(
{"name": topology_name})
if remote_topology is None:
remote_topology = self.add_remote_topology(topology_name)
for d in remote_topology.domains:
if d.id == domain.id:
print("Found domain " + domain.name + " in remote topology " +
remote_topology.name + ".")
return remote_topology
print("Domain " + domain.name + " not found in remote topology " +
remote_topology.name + ", adding it to remote topology.")
remote_topology.domains.append(domain)
self.remote_rt.flush()
return remote_topology
def add_remote_topology(self, topology_name):
remote_topology = Topology({"name": topology_name})
self.remote_rt.insert(remote_topology, commit=True)
self.remote_rt.flush()
return remote_topology
def clean_up(self):
self.local_rt.flush()
self.remote_rt.flush()