import re
import vserver
import os
+from time import strftime
dryrun = 0
vinidir = "/usr/share/vini/"
return subprocess.call(cmd, shell=True);
+"""
+Subnet used for virtual interfaces by setup-egre-link script
+"""
+def iias_network():
+ return "192.168.0.0 255.255.0.0"
+
+
"""
Check for existence of interface d<key>x<nodeid>
"""
else:
return False
-
"""
Create a "virtual link" for slice between here and nodeid.
The key is used to create the EGRE tunnel.
"""
-def setup_virtual_link(slice, key, rate, myid, nodeid, ipaddr):
+def setup_virtual_link(slice, key, rate, myid, nodeid, ipaddr, virtip, vnet):
logger.log("%s: Set up virtual link to node %d" % (slice, nodeid))
- if myid < nodeid:
- virtip = "10.%d.%d.2" % (myid, nodeid)
- else:
- virtip = "10.%d.%d.3" % (nodeid, myid)
-
- run(setup_link_cmd + " %s %s %s %s %s %s" % (slice, nodeid, ipaddr,
- key, rate, virtip))
+ run(setup_link_cmd + " %s %s %s %s %s %s %s" % (slice, nodeid, ipaddr,
+ key, rate, virtip, vnet))
return
return
+"""
+IP address of the NAT interface created inside the slice by the
+setup-nat script.
+"""
+def nat_inner_ip(key):
+ return "10.0.%s.2" % key
+
+
"""
Check for existence of interface natx<key>
"""
"""
Update virtual links for the slice
"""
-def update(slice, myid, topospec, key, netns):
+def update_links(slice, myid, topospec, key, netns):
topolist = convert_topospec_to_list(topospec)
- for (nodeid,ipaddr,rate) in topolist:
+ for (nodeid, ipaddr, rate, myvirtip, remvirtip, virtnet) in topolist:
if not virtual_link(key, nodeid):
if netns:
- setup_virtual_link(slice, key, rate, myid, nodeid, ipaddr)
+ setup_virtual_link(slice, key, rate, myid, nodeid,
+ ipaddr, myvirtip, virtnet)
else:
logger.log("%s: virtual link to node %s exists" % (slice, nodeid))
refresh_virtual_link(nodeid, key)
if not nat_exists(key):
- setup_nat(slice, myid, key)
+ if netns:
+ setup_nat(slice, myid, key)
else:
logger.log("%s: NAT exists" % slice)
refresh_nat(key)
try:
os.mkdir(SPACESDIR)
except os.error:
- logger.log("netns: could not create %s\n" % SPACESDIR)
+ logger.log("topo: could not create %s\n" % SPACESDIR)
return
f = open("%s/net" % SPACESDIR, "w")
f.write("%s\n" % value)
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)
+
+ 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)
+
+ f.write ("""!
+ router ospf
+ ospf router-id %s
+""" % ifaces[name]['local-ip'])
+
+ for name in ifaces:
+ f.write (" neighbor %s\n" % ifaces[name]['remote-ip'])
+
+ for name in ifaces:
+ net = ifaces[name]['network']
+ f.write (" network %s area 0\n" % net)
+
+ f.write(""" redistribute kernel
+!
+access-list vty permit 127.0.0.1/32
+!
+line vty
+""")
+ return
+
+
+"""
+Write config files directly into the slice's file system.
+"""
+def update_quagga_configs(slicename, hostname, myid, topo, key, netns):
+ ifaces = get_ifaces(hostname, myid, topo, key)
+
+ quagga_dir = "/vservers/%s/etc/quagga/" % slicename
+ if not os.path.exists(quagga_dir):
+ try:
+ # Quagga not installed. Install it here? Chkconfig, sym links.
+ os.mkdir(quagga_dir)
+ except os.error:
+ logger.log("topo: could not create %s\n" % quagga_dir)
+ return
+
+ write_zebra(quagga_dir + "zebra.conf.generated", hostname, ifaces,
+ myid, key)
+ write_ospf(quagga_dir + "ospfd.conf.generated", hostname, ifaces)
+
+ # Start up Quagga if we installed it earlier and netns = 1.
+
+ return
+
+
+"""
+Write /etc/hosts in the sliver
+"""
+def update_hosts(slicename, hosts):
+ hosts_file = "/vservers/%s/etc/hosts" % slicename
+ f = open(hosts_file, 'w')
+ f.write(hosts)
+ f.close()
+ return
+
+
def start(options, config):
+ run ("echo 1 > /proc/sys/net/ipv4/ip_forward")
pass
else:
netns = 0
- try:
- if vserver.VServer(sliver['name']).is_running():
- if 'egre_key' in attrs and 'topo_rspec' in attrs:
- logger.log("topo: Update topology for slice %s" % \
- sliver['name'])
- update(sliver['name'], data['node_id'],
- attrs['topo_rspec'], attrs['egre_key'], netns)
- except:
+ if vserver.VServer(sliver['name']).is_running():
+ if 'egre_key' in attrs and 'topo_rspec' in attrs:
+ logger.log("topo: Update topology for slice %s" % \
+ sliver['name'])
+ update_links(sliver['name'], data['node_id'],
+ attrs['topo_rspec'], attrs['egre_key'], netns)
+ update_quagga_configs(sliver['name'], data['hostname'],
+ data['node_id'], attrs['topo_rspec'],
+ attrs['egre_key'], netns)
+ if 'hosts' in attrs:
+ update_hosts(sliver['name'], attrs['hosts'])
+ else:
logger.log("topo: sliver %s not running yet. Deferring." % \
sliver['name'])
clean_up_old_virtual_links()
+ return