+ logger.log("%s: virtual link to node %s exists" % (slice, nodeid))
+ refresh_virtual_link(nodeid, key)
+
+
+"""
+Update NAT interface for the slice
+"""
+def update_nat(slice, myid, key, netns):
+ if not nat_exists(key):
+ if netns:
+ setup_nat(slice, myid, key)
+ else:
+ logger.log("%s: NAT exists" % slice)
+ refresh_nat(key)
+
+
+"""
+Write /etc/vservers/<slicename>/spaces/net.
+Restart the vserver if there are any changes.
+"""
+def write_spaces_net(slicename, value):
+ SLICEDIR="/etc/vservers/%s/" % slicename
+ SPACESDIR="%s/spaces/" % SLICEDIR
+ FILENAME="%s/net" % SPACESDIR
+ if os.path.exists(SLICEDIR):
+ if not os.path.exists(SPACESDIR):
+ try:
+ os.mkdir(SPACESDIR)
+ except os.error:
+ logger.log("topo: could not create %s\n" % SPACESDIR)
+ return
+
+ if os.path.exists(FILENAME) != value:
+ sliver = vserver.VServer(slicename)
+
+ sliver.stop()
+
+ if value:
+ STATUS="ON"
+ f = open(FILENAME, "w")
+ f.close()
+ else:
+ STATUS="OFF"
+ os.remove(FILENAME)
+
+ sliver.start()
+
+ logger.log("%s: network namespace %s\n" % (slicename, STATUS))
+
+
+"""
+Generate information for each interface in the sliver, in order to configure
+Quagga.
+"""
+def get_ifaces(hostname, myid, topospec, key):
+ ifaces = {}
+ topolist = convert_topospec_to_list(topospec)
+ for (nodeid, ipaddr, rate, myvirtip, remvirtip, virtnet) in topolist:
+ name = "a%sx%s" % (key, nodeid)
+ ifaces[name] = {}
+ ifaces[name]['remote-ip'] = remvirtip
+ ifaces[name]['local-ip'] = myvirtip
+ ifaces[name]['network'] = virtnet
+ ifaces[name]['short-name'] = hostname.replace('.vini-veritas.net', '')
+ return ifaces
+
+
+def write_header(f, myname, password):
+ f.write ("""! Configuration for %s
+! Generated at %s
+
+hostname %s
+password %s
+
+""" % (myname, strftime("%Y-%m-%d %H:%M:%S"), myname, password))
+ return
+
+
+"""
+IP address of NAT gateway to outside world
+"""
+def nat_gw(key):
+ return "10.0.%s.1" % key
+
+"""
+IP address of the NAT interface inside the slice
+"""
+def nat_inner(key):
+ return "10.0.%s.2" % key
+
+
+"""
+Write zebra.conf file for Quagga
+"""
+def write_zebra(filename, myname, ifaces, myid, key):
+ f = open(filename, 'w')
+ password = "zebra"
+ write_header(f, myname, password)
+
+ f.write ("enable password %s\n" % password)
+
+ for name in ifaces:
+ f.write ("""!
+interface %s
+link-detect
+""" % name)
+
+ f.write ("""!
+access-list vty permit 127.0.0.1/32
+!
+line vty
+!
+""")
+ f.close()
+ return
+
+
+"""
+Write ospfd.conf file for Quagga.
+"""
+def write_ospf(filename, myname, ifaces):
+ f = open(filename, 'w')
+ password = "zebra"
+ write_header(f, myname, password)
+ name = None
+
+ for name in ifaces:
+ f.write ("""!
+ interface %s
+ ip ospf cost 10
+ ip ospf hello-interval 5
+ ip ospf dead-interval 10
+ ip ospf network non-broadcast
+""" % name)
+
+ if name:
+ f.write ("""!
+ router ospf
+ ospf router-id %s
+""" % ifaces[name]['local-ip'])