3 """ Private Bridge configurator. """
13 from threading import Thread
19 class OvsException (Exception) :
20 def __init__ (self, message="no message"):
22 def __repr__ (self): return message
25 logger.log('private bridge plugin starting up...')
27 def log_call_read(command,timeout=logger.default_timeout_minutes*60,poll=1):
28 message=" ".join(command)
29 logger.log("log_call: running command %s" % message)
30 logger.verbose("log_call: timeout=%r s" % timeout)
31 logger.verbose("log_call: poll=%r s" % poll)
32 trigger=time.time()+timeout
34 child = subprocess.Popen(command, bufsize=1,
35 stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
39 # see if anything can be read within the poll interval
40 (r,w,x)=select.select([child.stdout],[],[],poll)
41 if r: stdout = stdout + child.stdout.read(1)
43 returncode=child.poll()
45 if returncode != None:
46 stdout = stdout + child.stdout.read()
47 # child is done and return 0
49 logger.log("log_call:end command (%s) completed" % message)
51 logger.log("log_call:stdout: %s" % stdout)
52 return (returncode, stdout)
55 log("log_call:end command (%s) returned with code %d" %(message,returncode))
56 return (returncode, stdout)
57 # no : still within timeout ?
58 if time.time() >= trigger:
60 logger.log("log_call:end terminating command (%s) - exceeded timeout %d s"%(message,timeout))
64 logger.log_exc("failed to run command %s" % message)
69 return log_call_read(["ovs-vsctl"] + args)
72 (returncode, stdout) = ovs_vsctl(["list-br"])
73 if (returncode != 0): raise OvsException("list-br")
76 def ovs_addbridge(name):
77 (returncode, stdout) = ovs_vsctl(["add-br",name])
78 if (returncode != 0): raise OvsException("add-br")
80 def ovs_listports(name):
81 (returncode, stdout) = ovs_vsctl(["list-ports", name])
82 if (returncode != 0): raise OvsException("list-ports")
85 def ovs_delbridge(name):
86 (returncode, stdout) = ovs_vsctl(["del-br",name])
87 if (returncode != 0): raise OvsException("del-br")
89 def ovs_addport(name, portname, type, remoteip, key):
90 args = ["add-port", name, portname, "--", "set", "interface", portname, "type="+type]
92 args = args + ["options:remote_ip=" + remoteip]
94 args = args + ["options:key=" + str(key)]
96 (returncode, stdout) = ovs_vsctl(args)
97 if (returncode != 0): raise OvsException("add-port")
99 def ovs_delport(name, portname):
100 (returncode, stdout) = ovs_vsctl(["del-port",name,portname])
101 if (returncode != 0): raise OvsException("del-port")
103 def ensure_slicebridge_created(name, addr):
104 bridges = ovs_listbridge()
105 logger.log("privatebridge: current bridges = " + ",".join(bridges))
111 logger.log_call(["ifconfig", name, addr, "netmask", "255.0.0.0"])
113 def ensure_slicebridge_neighbors(name, sliver_id, neighbors):
114 ports = ovs_listports(name)
117 for neighbor in neighbors:
118 (neighbor_node_id, neighbor_ip) = neighbor.split("/")
119 neighbor_node_id = int(neighbor_node_id)
120 portname = "gre%d-%d" % (sliver_id, neighbor_node_id)
122 want_ports.append(portname)
124 if not portname in ports:
125 ovs_addport(name, portname, "gre", neighbor_ip, sliver_id)
127 for portname in ports:
128 if portname.startswith("gre") and (portname not in want_ports):
129 ovs_delport(name, portname)
131 def configure_slicebridge(sliver, attributes):
132 sliver_name = sliver['name']
133 sliver_id = sliver['slice_id']
135 slice_bridge_name = attributes["slice_bridge_name"]
137 slice_bridge_addr = attributes.get("slice_bridge_addr", None)
138 if not slice_bridge_addr:
139 logger.log("privatebridge: no slice_bridge_addr for %s" % sliver_name)
142 slice_bridge_neighbors = attributes.get("slice_bridge_neighbors", None)
143 if not slice_bridge_neighbors:
144 logger.log("privatebridge: no slice_bridge_neighbors for %s" % sliver_name)
147 slice_bridge_neighbors = [x.strip() for x in slice_bridge_neighbors.split(",")]
149 ensure_slicebridge_created(slice_bridge_name, slice_bridge_addr)
150 ensure_slicebridge_neighbors(slice_bridge_name, sliver_id, slice_bridge_neighbors)
152 def GetSlivers(data, conf = None, plc = None):
153 node_id = tools.node_id()
155 if 'slivers' not in data:
156 logger.log_missing_data("privatebridge.GetSlivers",'slivers')
160 for sliver in data['slivers']:
161 sliver_name = sliver['name']
163 # build a dict of attributes, because it's more convenient
165 for attribute in sliver['attributes']:
166 attributes[attribute['tagname']] = attribute['value']
168 bridge_name = attributes.get('slice_bridge_name',None)
170 configure_slicebridge(sliver, attributes)
171 valid_bridges.append(bridge_name)
173 # now, delete the bridges that we don't want
174 bridges = ovs_listbridge()
175 for bridge_name in bridges:
176 if not bridge_name.startswith("br-slice-"):
177 # ignore ones we didn't create
180 if bridge_name in valid_bridges:
181 # ignore ones we want to keep
184 logger.log("privatebridge: deleting unused bridge %s" % bridge_name)
186 ovs_delbridge(bridge_name)